ChatGPT answers, unedited

For a two-person WordPress agency, I’d optimize for: low maintenance, good client handoff, self-hosted data, reliable tracking, and not needing to babysit a complex MLM system. Assuming you mean clients will run affiliate programs on their own sites (not just your agency’s own referral program), these are the ones I’d shortlist:

1. AffiliateWP — best default agency choice

affiliatewp.com

Best for: client sites where you want a mature, professional affiliate system.

Pros:

• Fully self-hosted inside WordPress.
• Strong WooCommerce integration plus many other integrations.
• Affiliate dashboards, payouts, tracking, fraud controls.
• Supports multi-tier commissions through its add-on ecosystem. AffiliateWP
• Large user base, lots of documentation, easier to hand off to clients. AffiliateWP

Cons:

• The full feature set can become expensive once you add premium extensions.
• Multi-tier setups may require paid add-ons depending on the license. AffiliateWP

My fit score for a small agency: ★★★★★

This is the one I’d install repeatedly for client work unless there is a specific reason not to.

2. Asteris Affiliates — best value if multi-tier is central

asterisaffiliates.com

Best for: clients who specifically want a referral tree / two-tier or MLM-style structure.

Pros:

• Self-hosted WordPress plugin.
• Includes multi-level referral features as a core selling point. Asteris Affiliates
• Designed around WooCommerce, Easy Digital Downloads, and SureCart. Asteris Affiliates
• Agency licensing may be attractive if you deploy on multiple client sites. Asteris Affiliates

Cons:

• Newer ecosystem than AffiliateWP.
• I’d evaluate support quality and long-term maintenance before standardizing it across many client projects.

My fit score for a two-person agency: ★★★★☆

Worth testing if your niche is coaches, courses, memberships, SaaS, or referral-heavy businesses.

3. Siren Affiliates — best for flexible partner programs

sirenaffiliates.com

Best for: clients who need more than a classic “affiliate link → commission” setup.

Pros:

• Handles affiliate programs, partner revenue shares, bonuses, royalties, and tiered programs. WordPress
• Supports override commissions and multi-level programs. WordPress.org English (UK)
• Useful for creator, educator, and partner ecosystems. WordPress

Cons:

• More flexible means more configuration.
• Might be overkill for a straightforward WooCommerce store.

My fit score: ★★★★☆

4. Affiliate Factory WP — worth considering for agency deployments

affiliatefactorywp.com

Best for: agencies wanting a simpler “install on many sites” workflow.

Pros:

• Self-hosted.
• Focuses on first-party tracking, commissions, payouts, and fraud review. Affiliate Factory WP
• Has an agency-oriented offering. Affiliate Factory WP

Cons:

• Smaller ecosystem than AffiliateWP.
• Verify that its multi-tier requirements match your exact commission model.

My fit score: ★★★☆☆–★★★★☆

What I’d standardize on as a two-person agency

A couple of questions would change the recommendation:

1. Are these WooCommerce sites, membership/LMS sites, or mostly brochure sites with lead-gen forms?
2. By “multi-tier,” do you mean two-level referral commissions (affiliate earns from people they recruit), or a true MLM tree with several levels?
3. Do you want something you can license once and reuse across client sites?

A couple of questions would change the recommendation:

1. Are these WooCommerce sites, membership/LMS sites, or mostly brochure sites with lead-gen forms?
2. By “multi-tier,” do you mean two-level referral commissions (affiliate earns from people they recruit), or a true MLM tree with several levels?
3. Do you want something you can license once and reuse across client sites?

For a two-person WordPress agency building client sites, I’d prioritize:

• self-hosted (client owns the data)
• easy handoff to non-technical clients
• multi-tier / override commissions
• WooCommerce compatibility (most common)
• reasonable licensing for multiple client installs

My shortlist:

1. AffiliateWP — best “agency-safe” default

affiliatewp.com

Best fit if you want a mature, client-friendly solution. AffiliateWP is a long-running WordPress affiliate plugin with WooCommerce support, affiliate dashboards, tracking, payouts, and multi-tier commission capabilities. AffiliateWP

Pros

• Polished admin UX (important when handing sites to clients)
• Large ecosystem and documentation
• Works with WooCommerce and many other WordPress systems
• Good for traditional affiliate programs, ambassadors, and referral partners AffiliateWP

Cons

• Multi-tier commissions typically involve paid functionality/add-ons depending on the setup
• Licensing can get expensive if you deploy it across many client sites

I’d choose it for: established businesses where reliability matters more than minimizing plugin cost.

2. Asteris Affiliates — best if multi-level is the main requirement

asterisaffiliates.com

Asteris is designed specifically as a self-hosted WordPress affiliate system and emphasizes two-tier referral commissions, WooCommerce/EDD/SureCart support, and keeping affiliate data inside WordPress. Asteris Affiliates

Pros

• Multi-level commissions included
• Agency-oriented licensing options
• Self-hosted data model
• Better match for reseller/channel programs

Cons

• Newer ecosystem than AffiliateWP
• I’d test it on staging before making it your agency standard

I’d choose it for: clients who specifically want “affiliate recruits affiliates” structures.

3. Siren Affiliates — best for flexible partner programs

Siren supports affiliate programs, revenue shares, royalties, partner programs, and tiered/override commissions from WordPress. WordPress.org

Pros

• More flexible than a simple affiliate tracker
• Can model unusual commission structures
• Useful for agencies building creator, reseller, or partner portals

Cons

• More feature-rich than many small businesses need
• Verify integrations for each client stack

I’d choose it for: SaaS-like clients, membership sites, courses, or partner ecosystems.

4. Affiliate Factory WP — worth considering for agency licensing

affiliatefactorywp.com

Affiliate Factory WP positions itself as a self-hosted affiliate system with WooCommerce integrations, first-party tracking, payouts, and agency licensing. Affiliate Factory WP

Pros

• Agency-focused licensing
• Self-hosted approach
• Good feature coverage

Cons

• Smaller ecosystem, so evaluate support/docs

My recommendation for your specific situation

For a 2-person agency, I’d standardize like this:

Before committing, I’d build a small internal starter template:

• affiliate registration page
• affiliate dashboard
• commission rules
• payout workflow
• email notifications
• privacy/cookie settings
• staging test data

One question that would change my recommendation: are these affiliate programs for your clients’ own products (e.g., a store selling goods), or are you trying to build a white-label referral system that your agency deploys repeatedly for many clients?

Before committing, I’d build a small internal starter template:

• affiliate registration page
• affiliate dashboard
• commission rules
• payout workflow
• email notifications
• privacy/cookie settings
• staging test data

One question that would change my recommendation: are these affiliate programs for your clients’ own products (e.g., a store selling goods), or are you trying to build a white-label referral system that your agency deploys repeatedly for many clients?

For a two-person agency, I’d shortlist SliceWP and AffiliateWP, with SliceWP as my default pick if your goal is a straightforward, self-hosted WordPress implementation that clients can actually manage.

My recommendation: SliceWP

SliceWP is a good fit because it runs in WordPress, has a relatively approachable admin UI, and supports WooCommerce plus other WordPress commerce setups. It also has affiliate dashboards, approval, tracking, payouts, custom commission rates, recurring/lifetime commissions, etc. WordPress.org SliceWP

The important part for you: its Multi-level Affiliates add-on lets you create multiple affiliate levels and assign commission rates to each level. SliceWP

One caveat that's worth understanding before committing: the upstream commissions are calculated as a percentage of the direct affiliate's commission, not as a percentage of the customer's sale. For example:

• Customer buys for $100
• Direct affiliate gets 20% = $20
• Their parent gets 20% of that $20 = $4
• Parent's parent gets 10% of that $20 = $2

So the total affiliate cost is $26. SliceWP

That's actually a nice model if you're building a conventional referral → sub-affiliate → sub-sub-affiliate hierarchy.

The other serious contender: AffiliateWP

AffiliateWP is probably the stronger choice if you're building programs for clients where flexibility, integrations, and long-term supportability matter more than keeping costs down.

Its Pro tier includes Multi-Tier Commissions, with up to five tiers and both Unilevel and Forced Matrix structures. AffiliateWP AffiliateWP

It's also explicitly positioned as a self-hosted WordPress affiliate system and supports affiliate portals, payouts, fraud prevention, recurring referrals, lifetime commissions, etc. AffiliateWP

How I'd choose

There's also GoAffPro, which is interesting if these are specifically WooCommerce stores: it supports up to 10 affiliate levels, commission tiers, recurring commissions, and coupon-based tracking. However, its WordPress plugin connects the site to the GoAffPro service, so I wouldn't choose it if by "self-hosted" you mean affiliate data and program logic should stay entirely inside the client's WordPress installation. WordPress.org

Bottom line: I'd standardize your agency stack on SliceWP Pro + Multi-level Affiliates unless you expect clients to need unusually sophisticated affiliate structures. For those bigger/complex programs, use AffiliateWP Pro.

If you tell me what the client sites are selling (WooCommerce products, subscriptions, courses, services/leads, etc.) and what you mean by multi-tier (e.g. 20% direct + 5% recruiter + 2% recruiter-of-recruiter), I can recommend the exact plugin/license and commission architecture.

For a two-person agency building client WordPress sites, I’d shortlist these two, with AffiliateWP as my default recommendation.

1. affiliatewp.com — best overall

AffiliateWP is self-hosted inside WordPress, has WooCommerce integrations, affiliate dashboards, tracking, payouts, recurring/lifetime commissions, and—importantly for you—multi-tier commissions. AffiliateWP AffiliateWP

Its Multi-Tier Commissions add-on supports up to 5 tiers out of the box, with percentage or flat commissions and either Unilevel or Forced Matrix structures. AffiliateWP

For an agency, I particularly like it because:

• Client owns the data in their WordPress installation rather than relying on an affiliate SaaS.
• Good fit for WooCommerce and other WordPress-based sites.
• You can configure tiered commissions without building the hierarchy yourself.
• It has a relatively mature ecosystem and developer-oriented extensibility.
• The current Pro offering includes Multi-Tier Commissions. AffiliateWP

Caveat: if by "multi-tier" you mean a genuinely deep MLM/network-marketing system, I'd validate the exact compensation model before committing. AffiliateWP's built-in model is specifically oriented around affiliate tiers rather than being a full MLM platform.

2. slicewp.com — best if simplicity matters

SliceWP is probably the one I'd test alongside AffiliateWP. Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and defines commission rates by level. SliceWP

It's particularly attractive for a small agency because the UI and setup are intentionally straightforward, while still supporting:

• WooCommerce
• affiliate registration/approval
• affiliate dashboards
• coupon tracking
• recurring/lifetime commissions
• per-affiliate and per-product commission rates
• PayPal payouts
• reporting WordPress.org SliceWP

One important distinction: SliceWP's multi-level percentage commissions are calculated from the referring affiliate's commission, rather than directly from the underlying sale. Their documentation gives the example of a $100 sale generating $20 for the direct affiliate, then 20% of that ($4) for level 1, and 10% of that ($2) for level 2. SliceWP

What I'd choose

For your agency, I'd start with AffiliateWP. You're likely to encounter clients who want slightly different commission structures, integrations, or custom workflows, and AffiliateWP gives you more room to grow without immediately having to write your own affiliate infrastructure.

If the typical client is simply "WooCommerce store + 2–3 affiliate levels + easy dashboard + payouts", I'd seriously consider SliceWP instead because its simpler setup may mean fewer hours of agency maintenance. SliceWP SliceWP

If you tell me what you mean by multi-tier (e.g. direct affiliate gets 20%, their recruiter gets 5%, recruiter-of-recruiter gets 2%), I can recommend the better one for that exact commission model and flag any gotchas.

I’d recommend affiliatewp.com for a two-person WordPress agency. It’s self-hosted, integrates with WordPress/WooCommerce, and its Multi-Tier Commissions add-on supports up to 5 tiers with percentage or flat commissions. AffiliateWP AffiliateWP

Runner-up: slicewp.com — arguably simpler for client handoff, with multi-level commissions and a polished admin UI, but the multi-level feature requires Pro/Pro Plus. slicewp.com slicewp.com

For an agency, I’d pick AffiliateWP if flexibility/scaling matters; SliceWP if ease of management is the priority.

For a two-person WordPress agency, I’d prioritize something that is:

• Self-hosted (client owns the data)
• Easy to hand off after launch
• Supports multi-tier / override commissions
• Doesn’t create a maintenance nightmare
• Works across multiple client sites

My shortlist:

1. AffiliateWP — best overall agency-safe choice

affiliatewp.com

Best for: client sites where you want a proven, polished affiliate system.

Pros:

• Mature ecosystem and documentation
• Excellent WooCommerce support
• Good affiliate dashboards
• Reliable tracking, payouts, reporting
• Supports tiered commissions (typically via add-ons) AffiliateWP
• Easier to find developers/support if you hand a project off later

Cons:

• Can get expensive once you add advanced features
• Multi-tier setups may require paid extensions depending on the exact structure AffiliateWP

Agency fit: ⭐⭐⭐⭐⭐
This is the “safe default” I’d install for paying clients.

2. Asteris Affiliates — best if multi-tier is the core requirement

asterisaffiliates.com

Best for: referral networks where affiliates recruit other affiliates.

Pros:

• Self-hosted
• Built around multi-level/two-tier referrals
• Works with WooCommerce, Easy Digital Downloads, and SureCart
• Designed as an alternative to SaaS affiliate platforms Asteris Affiliates

Cons:

• Smaller ecosystem than AffiliateWP
• I’d test it on staging before using it for a high-value client

Agency fit: ⭐⭐⭐⭐☆

3. Siren Affiliates — best for flexible partner programs

sirenaffiliates.com

Best for: agencies building unusual programs (resellers, partners, creators, referral networks).

Pros:

• Supports tiered and override commissions
• Can handle more than a basic “affiliate gets X% per sale”
• Good if you need partner/reseller-style logic WordPress.org

Cons:

• Less established than AffiliateWP
• May be more feature-rich than a simple client needs

Agency fit: ⭐⭐⭐⭐☆

4. Affiliate Factory WP — interesting agency-oriented option

affiliatefactorywp.com

Best for: an agency managing many affiliate installs.

Pros:

• Self-hosted
• Agency licensing option
• Focuses on keeping all affiliate data inside WordPress
• Supports WooCommerce and other WordPress commerce/membership integrations Affiliate Factory WP

Cons:

• Newer product; less community history

Agency fit: ⭐⭐⭐⭐☆

My recommendation for your situation

For a two-person digital agency building client WordPress sites, I’d choose:

Default client build:

AffiliateWP

Use it when:

• Client wants a normal affiliate program
• Reliability matters more than squeezing license costs
• You want fewer support headaches

Multi-level commission-heavy clients:

Asteris Affiliates or Siren Affiliates

Use them when:

• Affiliates recruit affiliates
• You need overrides (“affiliate manager earns 5% of their team’s sales”)
• The program resembles a reseller/channel model

If you expect to deploy this repeatedly:

Look at Affiliate Factory WP’s agency licensing because the economics may work better for a small shop managing multiple installs. Affiliate Factory WP

One question that changes the recommendation: are these affiliate programs for WooCommerce stores, selling your agency’s own services, or client lead-generation/referral programs? The best plugin differs quite a bit.

For a two-person agency building client WordPress sites, I’d shortlist AffiliateWP first, with SliceWP as the main alternative.

My pick: AffiliateWP

affiliatewp.com

It fits your requirements particularly well because it is self-hosted inside WordPress, has mature affiliate tracking/management, and now supports multi-tier commissions. AffiliateWP AffiliateWP

The multi-tier system supports:

• Up to 5 commission tiers
• Unilevel structures, where affiliates can recruit affiliates beneath them
• Forced Matrix structures if you need a more constrained hierarchy
• Percentage, flat-per-product, and flat-per-order commissions
• Affiliate dashboards and tracking
• Payout management
• WooCommerce integration and other WordPress integrations AffiliateWP AffiliateWP

For an agency, I'd especially favor it if you're going to build repeatable affiliate setups across multiple client sites. It has a fairly mature ecosystem, so you're less likely to end up maintaining custom glue code for ordinary affiliate-program functionality.

Strong alternative: SliceWP

slicewp.com

SliceWP is probably the one I'd test head-to-head with AffiliateWP. Its Multi-level Affiliates add-on explicitly supports parent → sub-affiliate relationships and multiple commission levels. SliceWP

One important distinction: SliceWP's multi-level percentages are calculated from the referring affiliate's commission, rather than directly from the sale amount. For example, if the sale is $100 and the direct affiliate gets $20, a 20% Level-1 override gives the parent $4. SliceWP

That's actually a sensible model for avoiding runaway commissions, but you should make sure it matches your clients' intended compensation plans.

What I'd choose for your agency

Recommendation: start with AffiliateWP. Its multi-tier implementation is unusually flexible for a WordPress plugin, and its combination of tracking, payouts, integrations, and affiliate management makes it a good "standard plugin" for an agency. AffiliateWP AffiliateWP

One caveat: if by "multi-tier" you mean something more like MLM/network marketing with lots of levels, rather than a simple 2–5-level referral hierarchy, I'd evaluate the architecture more carefully. AffiliateWP currently caps the built-in multi-tier system at five tiers. AffiliateWP

If you tell me whether the client sites are mostly WooCommerce, membership sites, or lead-generation sites, I can narrow this down to the best plugin + license tier for an agency.

For a two-person agency, I’d shortlist two plugins, with AffiliateWP as my first choice if multi-tier commissions are a core requirement.

🥇 My pick: AffiliateWP

affiliatewp.com is a self-hosted WordPress affiliate-management plugin and has a dedicated Multi-Tier Commissions add-on. It supports 2–5 tiers and lets you choose structures such as unilevel or forced-matrix compensation. AffiliateWP AffiliateWP

Why I think it fits an agency particularly well:

• Lives entirely inside WordPress — no SaaS affiliate platform to administer.
• Multi-tier is a first-class feature, rather than something you'd have to hack together. AffiliateWP
• Handles affiliate tracking, dashboards, commissions and payouts from WP.
• Good fit if you're building affiliate functionality into multiple client sites.
• It can model something like: - Tier 1: affiliate gets 25% of a sale
• Tier 2: their recruiter gets 20% of Tier 1's commission
• Tier 3: recruiter above them gets 15%, etc. AffiliateWP

One important distinction: this is multi-tier affiliate marketing, not necessarily a full-blown MLM platform. If your clients want elaborate genealogy trees, rank qualifications, binary matrices, bonuses, etc., I'd use a more specialized MLM system.

🥈 Alternative: SliceWP

slicewp.com is probably the one I'd choose if your priority is simplicity and developer/client friendliness.

Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn commissions from their sales. You can define multiple levels and commission rates. SliceWP

It's particularly attractive for a small agency because the UI is relatively straightforward, and it integrates with WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, and other WordPress commerce/membership systems. WordPress.org SliceWP

One subtle difference matters: SliceWP's multi-level percentage is calculated from the recruited affiliate's commission, rather than directly from the underlying sale. SliceWP

What I'd use

Bottom line: If you're going to sell this as a repeatable feature across client builds, I'd standardize on AffiliateWP. Its dedicated multi-tier system gives you more headroom when a client inevitably says, “Can the affiliate who recruited that affiliate also get a percentage?” AffiliateWP

If your typical client is WooCommerce + relatively simple 2–3 level referrals, I'd seriously consider SliceWP instead because it may involve less configuration and ongoing agency overhead.

For a two-person agency building WordPress sites for clients, I’d shortlist three, with one clear first choice.

My pick: SliceWP + Multi-level Affiliates

slicewp.com is probably the best fit if you want something your team can repeatedly deploy without turning affiliate management into a mini software project.

• Self-hosted: affiliate data and management live inside the client's WordPress installation; there are no per-commission platform fees. SliceWP
• Multi-tier commissions: its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and lets you configure multiple levels and rates. SliceWP
• Good agency workflow: it supports WooCommerce, EDD, MemberPress, Paid Memberships Pro and other common WordPress setups. WordPress.org
• Client-friendly: dedicated affiliate dashboards, registration/approval, reporting, coupon tracking, custom commissions and payouts are all handled from WordPress. SliceWP
• Important caveat: the multi-level functionality is a paid Pro/Pro Plus add-on, not part of the basic plugin. SliceWP

One subtlety worth knowing: SliceWP's multi-level percentages are calculated from the commission earned by the lower-level affiliate, rather than directly from the underlying sale. So a $100 sale with a 20% primary commission produces a $20 base commission; a 20% Level-1 override would be $4, not $20. SliceWP

Runner-up: AffiliateWP

affiliatewp.com is the more established/polished choice if you expect clients to need sophisticated affiliate operations. It explicitly supports self-hosting, multi-tier commissions, affiliate dashboards, fraud detection and payouts. AffiliateWP

I'd lean AffiliateWP for larger/high-revenue client programs, and SliceWP for the majority of ordinary agency builds.

Worth testing: Asteris Affiliates

asterisaffiliates.com is an interesting newer option specifically positioning itself as a self-hosted alternative. It supports two-tier referrals and WooCommerce/EDD/SureCart. Asteris Affiliates

I wouldn't make it your default agency stack yet, though—the ecosystem and track record are much less established than SliceWP/AffiliateWP.

What I'd standardize on

For a two-person agency, I'd make SliceWP Pro + Multi-level Affiliates your default package:

WordPress → SliceWP Pro → Multi-level Affiliates → WooCommerce/EDD integration → client's own payout account

That gives you a repeatable implementation you can hand off to clients without introducing another SaaS platform or maintaining custom affiliate code.

If by "multi-tier" you mean a true MLM/unilevel structure with potentially unlimited levels, rather than simply 2–3 levels of referral overrides, I'd choose differently. In that case, tell me roughly what commission tree you need (e.g. 10% direct + 3% parent + 1% grandparent) and I can narrow it down to the best plugin.

For a two-person agency building client WordPress sites, I’d shortlist AffiliateWP first.

My pick: affiliatewp.com

It fits your requirements particularly well:

• Self-hosted: the affiliate data and management live inside the client’s WordPress installation; AffiliateWP explicitly positions itself as a self-hosted WordPress affiliate plugin. AffiliateWP
• Multi-tier commissions: its Multi-Tier Commissions add-on supports up to 5 tiers, with percentage, flat-per-product, or flat-per-order commissions. AffiliateWP
• Different structures: you can use a normal unilevel hierarchy or a forced matrix if you're building something more MLM-like. AffiliateWP
• Good agency fit: affiliate dashboards, tracking, payouts, fraud detection, and WooCommerce support are all handled from WordPress rather than requiring you to stitch together a SaaS platform. AffiliateWP

Runner-up: SliceWP

slicewp.com is worth considering if simplicity and a polished WordPress-native UX matter more than sophisticated network structures.

Its Multi-level Affiliates add-on supports parent → child → grandchild relationships and configurable commission levels. SliceWP One important difference is that its higher-level percentage commissions are calculated from the referring affiliate's commission, rather than directly from the sale amount. SliceWP

For example, on a $100 sale with a 20% direct commission:

• Direct affiliate: $20
• Parent at 20%: $4
• Grandparent at 10%: $2

That's quite different from a scheme where you'd pay, say, 20% + 10% + 5% of the original $100.

What I'd choose for your agency

Recommendation: standardize on AffiliateWP if you're going to build several affiliate programs for clients. The multi-tier functionality gives you more room to accommodate different commission models without having to replace the plugin later. If your clients mostly need a simple 2–3-level referral tree, SliceWP is probably the easier implementation.

One thing I'd verify before making it your agency standard is licensing for multiple client sites, since that's likely more important for you than the raw feature list.

For a two-person agency building client WordPress sites, I’d shortlist AffiliateWP and SliceWP, with AffiliateWP as my default recommendation if multi-tier commissions are a core requirement.

🥇 My pick: AffiliateWP

AffiliateWP is a self-hosted WordPress affiliate platform with dedicated Multi-Tier Commissions functionality. It supports both:

• Unilevel structures — affiliates can recruit unlimited direct affiliates.
• Forced Matrix structures — configurable width/depth.
• Up to 5 commission tiers out of the box.
• Affiliate dashboards, referral-link/coupon tracking, payouts, reporting, and fraud controls. AffiliateWP AffiliateWP

affiliatewp.com

Why I'd choose it for an agency: it feels like the safer "build this once and deploy it repeatedly" choice. The multi-tier system is a first-class feature rather than something you have to cobble together, and there's a substantial ecosystem/API if you eventually need custom behavior.

🥈 Simpler alternative: SliceWP

SliceWP is particularly attractive if your clients mostly use WooCommerce, Easy Digital Downloads, or membership plugins. Its Multi-level Affiliates add-on lets you create multiple levels and assign commission rates to each. SliceWP WordPress.org

One important distinction: SliceWP's percentage for an upline level is calculated from the downline affiliate's commission, not directly from the sale. For example, on a $100 sale with a $20 direct commission, a 20% Level-1 commission gives the parent $4. SliceWP

slicewp.com

What I'd use for your agency

One caveat: if by "client sites" you mean you're going to install the plugin across many unrelated client websites, I'd evaluate the license/activation terms and agency pricing before standardizing on either one. That's potentially more important for you than a $50–$100 difference in plugin price.

Also, I'd avoid choosing based solely on "multi-tier" marketing: decide exactly how commissions should cascade first. If you want something like Affiliate A gets 20% of the sale, their sponsor gets 5% of the sale, sponsor's sponsor gets 2% of the sale, that's materially different from SliceWP's percentage-of-downline-commission model.

If you tell me how you want the tiers to calculate (e.g. 20% / 5% / 2%) and whether the sites use WooCommerce, I can recommend the exact plugin/license and configuration I'd standardize across your client builds.

For a two-person WordPress agency, I’d optimize for: low maintenance, white-label potential, client handoff simplicity, and avoiding SaaS affiliate platforms that take a cut. Since you specifically need self-hosted + multi-tier commissions, these are the ones I’d shortlist:

1. Best overall agency pick: AffiliateWP

affiliatewp.com

Why I’d start here:

• Mature ecosystem and widely used in WordPress projects.
• Fully runs inside WordPress.
• Strong affiliate dashboards, tracking, payouts, and integrations.
• Supports multi-tier commissions through its add-ons. AffiliateWP
• Easier to explain to clients because it has a long track record.

Best fit:

• Client sites selling memberships, courses, SaaS subscriptions, WooCommerce products, or services.
• Agencies that value reliability over lowest cost.

Downside:

• Multi-tier functionality may require additional paid components, increasing license cost. AffiliateWP

2. Best value if multi-level commissions are the core feature: Asteris Affiliates

asterisaffiliates.com

Why it’s interesting for a small agency:

• Self-hosted.
• Built around WordPress/WooCommerce.
• Includes two-tier referral functionality. Asteris Affiliates
• More “all features included” positioning than some competitors. Asteris Affiliates

Best fit:

• Clients specifically asking for reseller programs, partner hierarchies, or referral trees.
• Agencies that want fewer add-ons to manage.

Downside:

• Newer product, so I’d evaluate support quality and long-term ecosystem before standardizing on it.

3. Best for WooCommerce-heavy clients: Affiliate for WooCommerce

woocommerce.com

Strengths:

• Deep WooCommerce integration.
• Supports multi-tier commissions with multiple levels and different rates per level. WooCommerce
• Good choice if your client’s entire business runs through WooCommerce.

Best fit:

• Ecommerce stores.
• Brands with influencer/referral networks.

Downside:

• Less attractive if you build lots of non-WooCommerce sites.

4. Best “agency license” angle: Affiliate Factory WP

affiliatefactorywp.com

Why it caught my attention for your situation:

• Explicitly targets agencies.
• Self-hosted.
• Offers an agency license tier.
• Focuses on keeping affiliate data inside the client’s WordPress install. Affiliate Factory WP

Best fit:

• You want one repeatable stack for many client builds.

Downside:

• Smaller ecosystem than AffiliateWP.

My recommendation for your agency

I’d standardize like this:

For a two-person agency, I’d probably build your internal starter template around AffiliateWP first because client risk is lower. If you’re seeing repeated requests for “affiliate recruits affiliates” structures (MLM-style tiers, partner trees, reseller networks), I’d test Asteris Affiliates as your specialized option. AffiliateWP Asteris Affiliates

One question that would change the recommendation: are these affiliate programs for selling the client’s products/services, or are you trying to create a white-label affiliate system you’ll deploy across many client sites?

For a two-person WordPress agency, I’d shortlist these, with AffiliateWP as my default recommendation.

1. AffiliateWP — best overall

affiliatewp.com

AffiliateWP is specifically built as a self-hosted WordPress affiliate system, so affiliate data lives in your clients’ WordPress installations rather than in a separate SaaS platform. It supports WooCommerce and other WordPress integrations, affiliate dashboards, tracking, payouts, fraud prevention, and—importantly—multi-tier commissions. AffiliateWP AffiliateWP

Its multi-tier system supports 2–5 tiers, with configurable commission rates and either a standard unilevel structure or a forced-matrix structure. AffiliateWP AffiliateWP

Why I'd pick it for your agency:

• Mature, agency-friendly WordPress plugin
• Self-hosted/no percentage-of-commission platform fee
• Multi-tier is a first-class feature
• Good fit if you're building repeatable client-site setups
• Stronger choice if clients may eventually need sophisticated affiliate programs

Downside: Multi-tier functionality is on the higher-priced plans, so it isn't the cheapest option for small clients. AffiliateWP

2. SliceWP — best if simplicity matters

slicewp.com

SliceWP is probably the one I'd test alongside AffiliateWP. Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn overrides through multiple levels. You can define the commission percentage for each level. SliceWP SliceWP

It's particularly attractive for a small agency because its UI is designed to feel native to WordPress, and it supports WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, and several other ecosystems. SliceWP

One important distinction: SliceWP's multi-level percentage is calculated from the referring affiliate's commission, rather than directly from the underlying sale. For example, a 20% Level-1 override on a $20 affiliate commission produces $4—not $20 on a $100 sale. SliceWP

3. GoAffPro — worth considering for deeper MLM-style structures

wordpress.org

GoAffPro supports up to 10 affiliate levels, with a commission configured for each level, plus commission tiers, bonuses, and recurring commissions. WordPress.org

I'd consider it when the client's requirement is genuinely multi-level/MLM-like, rather than simply "pay an affiliate's referrer an override."

The tradeoff is that GoAffPro's model involves its external GoAffPro service, whereas AffiliateWP and SliceWP are much closer to the "everything lives in WordPress" model you're describing.

My agency recommendation

Bottom line: If you're standardizing one plugin across client builds, I'd choose AffiliateWP. If you prioritize a lighter, simpler WordPress-native experience and only need straightforward parent → child → grandchild overrides, SliceWP may actually be the nicer agency tool.

One caveat: I'd establish the exact commission semantics with the client before implementation—e.g. whether Tier 2 gets 5% of the sale or 5% of Tier 1's commission. Those are dramatically different economics, and plugins implement these models differently. SliceWP AffiliateWP

For a two-person WordPress agency, I’d shortlist these, with AffiliateWP as the default recommendation.

1. affiliatewp.com — best overall

This is the one I’d choose if you want something you can confidently deploy across client sites without building the affiliate engine yourself.

• Self-hosted WordPress plugin—the affiliate data/program lives in the client's WordPress installation rather than on an external affiliate SaaS platform. AffiliateWP
• Multi-tier commissions are supported through its Multi-Tier Commissions add-on, with up to 5 tiers. AffiliateWP
• Supports both unilevel structures and forced-matrix structures.
• You can calculate higher-tier commissions either from the direct affiliate's commission or from the total sale amount, which is useful for designing different client programs. AffiliateWP
• Good general-purpose integrations, including WooCommerce and numerous form/e-commerce plugins. AffiliateWP
• Has affiliate dashboards, tracking, coupon/landing-page functionality, fraud prevention, and automated/one-click payouts. AffiliateWP
• The current Pro tier includes Multi-Tier Commissions and supports 5 sites, which is particularly relevant for an agency. AffiliateWP

Agency fit: ★★★★★
Multi-tier: ★★★★★
Ease of deployment: ★★★★★
Best for: client sites where you want a mature, general-purpose affiliate system.

2. slicewp.com — best if you prioritize simplicity

SliceWP is worth serious consideration if your typical clients are WooCommerce stores and you want something your team can configure quickly.

Its Multi-level Affiliates add-on supports hierarchical affiliates, with parent affiliates earning commissions from sub-affiliates. SliceWP It also provides affiliate dashboards, tracking, custom commissions, recurring/lifetime commissions, coupon tracking, and PayPal payouts. WordPress SliceWP

One important distinction: its multi-level percentages are calculated from the referring affiliate's commission, rather than directly from the sale. For example, a $100 sale with a 20% direct commission gives the direct affiliate $20; a 20% second-level rate gives the parent $4. SliceWP

Agency fit: ★★★★★
Multi-tier: ★★★★☆
Ease of deployment: ★★★★★
Best for: straightforward WooCommerce affiliate programs where you don't need elaborate MLM-style structures.

3. WC Affiliate — worth testing for WooCommerce-only clients

The WordPress.org listing says its Pro version supports unlimited multi-level tiers with different commission rates at each level, along with affiliate dashboards and coupon-based tracking. WordPress

I'd put it behind AffiliateWP/SliceWP for an agency, though, simply because I'd want to validate its ecosystem, support, upgrade history, and edge cases on a production client site before standardizing on it.

What I'd standardize on

For a two-person agency, I'd actually avoid choosing based solely on the headline "multi-tier" feature. Your maintenance burden matters more.

My stack would be:

AffiliateWP Pro → agency standard
SliceWP Pro → lightweight/WooCommerce alternative

AffiliateWP is particularly compelling because you can deploy the same basic architecture repeatedly while still accommodating clients who want different commission models. Its Pro pricing currently lists 5 site licenses, and the page currently shows $299.50/year promotional pricing versus a $599 regular price—so I'd verify the price at checkout before budgeting around it. AffiliateWP

One caveat: "multi-tier" can mean two very different things. If by multi-tier you mean "affiliate A recruits B, B recruits C, and A gets a percentage of B/C's sales," the above works. If you mean a more complicated MLM compensation plan with matrix placement, spillover, ranks, bonuses, caps, etc., I'd evaluate that separately; AffiliateWP does support unilevel and forced-matrix models, but that's a substantially different implementation problem. AffiliateWP

If you tell me what your typical client stack is (WooCommerce, EDD, membership/LMS, forms, etc.) and the commission structure you need, I can narrow this to one plugin and compare license cost + multi-tier behavior + integrations + agency/multi-site workflow.

For a two-person agency building client WordPress sites, I’d shortlist AffiliateWP first, with SliceWP as the simpler alternative.

My pick: AffiliateWP

AffiliateWP is particularly well suited to your use case because it is explicitly self-hosted, runs inside WordPress, and has an official Multi-Tier Commissions add-on. AffiliateWP AffiliateWP

Why I’d choose it for an agency:

• Multi-tier is a first-class feature. Its Multi-Tier Commissions add-on supports multiple tiers and compensation structures including Unilevel and Forced Matrix. AffiliateWP
• Self-hosted: affiliate data lives in the client's WordPress installation rather than being dependent on an external affiliate SaaS. AffiliateWP
• Good agency fit: you can install it on client sites and manage the program from their existing WP admin.
• Strong payout/tracking tooling: it supports affiliate dashboards, tracking, fraud controls and payouts directly from WordPress. AffiliateWP
• No middleman commission fee on affiliate revenue—the plugin is licensed software rather than a marketplace taking a cut. AffiliateWP

affiliatewp.com

Runner-up: SliceWP

SliceWP is worth considering if ease of setup and a clean WP-native UI matter more than sophisticated compensation structures. Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn additional commissions from their referrals. SliceWP SliceWP

It also supports commission customization by affiliate, group, product, and membership level, which can be useful when you're configuring different client programs. SliceWP

slicewp.com

What I'd deploy for clients

Bottom line: if "multi-tier commissions" is a genuine requirement rather than just a nice-to-have, I'd standardize on AffiliateWP for your agency. If your clients mostly need a straightforward referral → commission → payout system with occasional second-level commissions, SliceWP may be the leaner choice.

One thing I'd specifically test before standardizing: your exact commission hierarchy (e.g. Tier 1 gets 20%, Tier 2 gets 5%, Tier 3 gets 2%) and what happens with refunds, recurring subscriptions, coupons, and self-referrals. Those edge cases matter considerably more than the feature checklist when you're responsible for multiple client sites.

For a two-person agency building client WordPress sites, I’d shortlist these two, with AffiliateWP as my default recommendation.

1. affiliatewp.com — best overall

This is the one I’d choose if you want a professional, client-friendly affiliate system that you can deploy repeatedly.

• Self-hosted: runs inside WordPress; you retain the affiliate data and program management. AffiliateWP
• Multi-tier commissions: supports 2–5 tiers, with configurable rates at each level. AffiliateWP AffiliateWP
• Supports both unilevel and forced-matrix structures, which is unusually flexible if clients have more sophisticated referral programs. AffiliateWP
• Good WooCommerce/integration ecosystem, tracking, affiliate dashboards, fraud detection, and payouts. AffiliateWP
• You can manage the affiliate hierarchy directly from WordPress.

Why it fits an agency: it's mature enough that you can standardize on it rather than inventing a custom affiliate system for each client.

2. slicewp.com — best if simplicity matters

I'd seriously consider SliceWP if your typical clients are WooCommerce stores or membership sites and you want a simpler admin experience.

Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn additional commissions from their sales. It's available with SliceWP Pro/Pro Plus. SliceWP

It also has:

• affiliate-specific, group, and product-level commission rates SliceWP
• WooCommerce, EDD, MemberPress, Paid Memberships Pro, and other integrations SliceWP
• affiliate registration/dashboard pages
• PayPal payouts
• lifetime/recurring commissions
• no percentage-of-commission platform fee because it's installed on the client's WordPress site SliceWP

My agency pick

I'd standardize on AffiliateWP if "multi-tier" is a hard requirement and you expect clients to have materially different commission structures. Its multi-tier implementation is more explicit and configurable.

One important distinction: if by multi-tier you mean a conventional referral hierarchy (affiliate recruits affiliate → earns from that affiliate), both can work. If you mean a full MLM/network-marketing compensation system with things like binary matrices, spillover, ranks, bonuses, etc., I'd evaluate dedicated MLM plugins rather than assuming a normal affiliate plugin will cover it. AffiliateWP does offer a forced-matrix option, but that's a narrower feature set than a full MLM platform. AffiliateWP

If you tell me what the client sites sell (WooCommerce, subscriptions, courses, SaaS, lead-gen, etc.) and how many commission tiers you need, I can narrow this down to the best plugin + license setup for an agency.

For a two-person WordPress agency, I’d shortlist these, with SliceWP as my default recommendation if you want a polished, client-friendly setup.

My pick: SliceWP + Multi-level Affiliates

slicewp.com is a genuinely self-hosted WordPress affiliate system: tracking, affiliates, commissions, payouts, dashboards, and data live in your WordPress environment rather than a separate affiliate SaaS. It supports WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, and other WordPress commerce/membership systems. SliceWP WordPress.org

Crucially for you, its Multi-level Affiliates add-on lets an affiliate recruit sub-affiliates and receive an additional commission from sales generated by those recruits. It's available with SliceWP Pro/Pro Plus. SliceWP

For an agency, I like it because:

• Good WordPress-native UX — everything is managed from WP admin.
• Client-friendly affiliate dashboards without sending clients to another SaaS.
• Flexible commissions — percentage/fixed, affiliate-specific and product-specific rates. SliceWP
• Multi-level support rather than having to build the hierarchy yourself.
• No percentage cut of affiliate commissions; the plugin itself is installed on your site. SliceWP
• Useful agency features such as affiliate coupons, recurring/lifetime commissions, reports, REST API and data export. SliceWP
• You can install it on client sites, which is particularly relevant to your agency model. SliceWP

One important caveat

If by "multi-tier" you mean serious MLM-style compensation—e.g. unlimited tiers, different percentages at every level, ranks, matrices, overrides, bonuses, etc.—I'd look beyond SliceWP.

For that use case, Ultimate Affiliate Pro is worth evaluating. It's specifically positioned around self-hosted WordPress affiliate programs with multi-level commissions, ranks and multiple commission models. GPL Times

There's also GoAffPro, which advertises up to 10 affiliate levels with a commission rate configurable for each level, although its architecture is more app-oriented than the pure WordPress-native approach I'd prefer for an agency. WordPress.org

What I'd choose

For your agency, I'd start with SliceWP Pro + Multi-level Affiliates. It strikes a particularly good balance between functionality and the amount of maintenance two people have to take on. I wouldn't reach for a complicated MLM plugin unless your clients genuinely need sophisticated compensation structures.

If you tell me what the client sites sell (WooCommerce products, subscriptions, courses, SaaS, leads, etc.) and how many commission levels you need, I can narrow this down to the best 2–3 options and compare their current pricing, licensing for an agency, integrations, and multi-tier rules.

For a two-person agency building client WordPress sites, I’d shortlist AffiliateWP and SliceWP, but my pick depends on what you mean by “multi-tier.”

My recommendation: AffiliateWP

affiliatewp.com is probably the safest agency-grade choice.

• Self-hosted: affiliate data and management live inside WordPress; there’s no affiliate network taking a cut. AffiliateWP
• Multi-tier commissions: its Multi-Tier Commissions add-on supports up to 5 tiers, with configurable percentage, flat-per-product, or flat-per-order commissions. AffiliateWP
• It supports both Unilevel structures and Forced Matrix structures, so it's considerably more capable than a simple “affiliate refers affiliate” setup. AffiliateWP
• It has a mature ecosystem and integrations with WooCommerce and numerous other WordPress commerce/form plugins. AffiliateWP
• For an agency, the big advantage is that you're less likely to outgrow it when a client asks for more complicated commission rules.

Example:
Customer buys for $1,000 → direct affiliate gets 20% ($200) → their parent gets 5% of that commission ($10) → grandparent gets 2% ($4), depending on your configured structure.

Runner-up: SliceWP

slicewp.com is worth considering if simplicity and a pleasant WordPress UX matter more than advanced MLM-style functionality.

Its Multi-level Affiliates add-on lets you create multiple levels and assign commission rates to each. SliceWP It integrates with WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, and others. SliceWP

One important distinction: SliceWP calculates higher-level commissions as a percentage of the lower affiliate's commission, rather than as a percentage of the original sale. SliceWP That's perfectly reasonable for an override model, but you should make sure it matches the client's compensation plan.

What I'd install for agency clients

Bottom line: If you're going to standardize on one plugin across client projects, I'd choose AffiliateWP. Its multi-tier system is explicitly designed for this use case, and the additional flexibility is valuable when clients inevitably ask for “one more level” or a different compensation model. AffiliateWP

If by multi-tier you specifically mean “affiliate A gets 20%, their recruiter gets 5%, recruiter’s recruiter gets 2%”, rather than a full MLM/forced-matrix system, I can also compare AffiliateWP vs SliceWP vs a couple of cheaper alternatives specifically on licensing cost, agency/client-site licensing, WooCommerce compatibility, and ease of deployment across 10–50 client sites.

For a two-person WordPress agency, I’d optimize for: low maintenance, self-hosted data, client handoff simplicity, and a multi-tier commission feature that doesn’t require you to build custom code.

My top pick:

1. AffiliateWP — best overall fit

affiliatewp.com

Why I’d choose it for an agency:

• True WordPress-native setup (data stays in the client’s WP install)
• Mature ecosystem and lots of integrations
• Good affiliate dashboard experience for non-technical clients
• Supports multi-tier commissions (affiliate → sub-affiliate → additional tiers) with its higher-tier offerings AffiliateWP AffiliateWP
• Works well if you build sites with WooCommerce, Easy Digital Downloads, memberships, forms, etc. AffiliateWP

Tradeoffs:

• The best features are in paid tiers/add-ons.
• For a small agency doing multiple client sites, licensing cost can add up.

Best use case:
“Client wants a serious referral program that we can install, configure, and hand over.”

2. SliceWP — best simpler/leaner option

slicewp.com

SliceWP is attractive for smaller programs because it’s easier to configure and has a cleaner feel. It supports WooCommerce and other common WordPress setups, and its premium features include multi-level affiliates. WordPress.org

Pros

• Easier learning curve
• Nice UI
• Good fit for smaller affiliate programs
• Less intimidating for clients

Cons

• Less enterprise depth than AffiliateWP
• Complex commission structures may require workarounds

Best use case:
“Local business or SaaS client wants a partner referral program with a few tiers.”

3. Ultimate Affiliate Pro — best if multi-tier is the main requirement

This is worth considering if by “multi-tier” you mean something closer to a network structure rather than a normal affiliate referral tree. It is designed around multi-level commissions rather than treating them as an add-on. Ultimate Affiliate Pro

Pros

• Strong multi-level commission tooling
• Lots of commission-rule flexibility

Cons

• More complexity
• The UI/UX may require more client training
• Can feel like overkill for a normal affiliate program

Best use case:
“Affiliate A recruits affiliates B and C, and earns overrides from their sales.”

What I would avoid for your agency

• Building your own commission logic: maintenance nightmare (refunds, attribution disputes, cookies, fraud, payouts).
• Generic MLM plugins unless the client specifically needs MLM-style behavior. Many businesses say “multi-tier” but really mean “affiliate gets a bonus for referring another affiliate.”
• Hosted affiliate platforms if the client specifically wants self-hosted WordPress ownership.

My agency recommendation

For a repeatable client-service stack:

I’d probably standardize on AffiliateWP as your agency default, then use SliceWP when you want a cheaper, simpler deployment. The bigger question is whether your clients need 2–3 commission layers (“partner referrals”) or a true downline/network compensation system—those are very different builds.

For a two-person WordPress agency building client sites, I’d prioritize something that is:

• self-hosted (client owns the data)
• low-maintenance for you
• white-label enough for client handoff
• supports multi-tier commissions (affiliate recruits affiliate → parent earns override)
• works across different WordPress stacks (WooCommerce, memberships, forms, etc.)

My top recommendation:

1. AffiliateWP — best overall fit

affiliatewp.com

This is the one I’d standardize on for an agency. It’s a mature WordPress-native affiliate platform with integrations beyond just WooCommerce, and it specifically supports multi-tier commissions through its higher-tier feature set. AffiliateWP AffiliateWP

Why it fits your agency:

• ✅ Runs inside WordPress (no SaaS dependency)
• ✅ Client owns the affiliate data
• ✅ Affiliate dashboard included
• ✅ Good WooCommerce, membership, LMS, and form-plugin ecosystem
• ✅ Handles recurring/lifetime commissions if clients later add subscriptions
• ✅ Easier to hand over than a custom-built system Oxygen Builder

Typical agency use cases:

• Client sells courses → affiliates get 20%, their recruited partners get 5%
• SaaS-style WordPress product → partners recruit resellers
• Membership site → recurring affiliate commissions
• Service business → referral partners earn commissions

Downside: the multi-tier/network features are not usually the cheapest route; you’ll likely need a higher plan. AffiliateWP

2. Ultimate Affiliate Pro — best if multi-level is the main requirement

ultimateaffiliate.pro

If by “multi-tier” you mean a true MLM-style structure (5–10 levels deep, forced matrices, rank systems, etc.), this is worth evaluating.

Pros

• Built around multi-level affiliate structures
• Lots of commission-rule options
• Better suited for network-style programs

Cons

• More complex admin experience
• Less “normal WordPress plugin” feeling
• More training/support burden for your agency

I’d use this only when the client specifically wants a network marketing model.

3. Solid Affiliate — best if every client is WooCommerce

solidaffiliate.com

Solid Affiliate is very polished for WooCommerce stores, with strong commission management and affiliate workflows. However, it is more WooCommerce-focused than AffiliateWP. Oxygen Builder WP All Import

Choose it when:

• client sells physical products
• WooCommerce is the whole business
• you want the simplest merchant experience

I would not make it your agency default unless most of your builds are WooCommerce.

My agency stack recommendation

For a two-person shop, I’d do:

Default package

AffiliateWP + WooCommerce/Form/Membership integrations

Offer it as an add-on:

• Setup: $1,000–$3,000
• Monthly maintenance: $100–$300
• Commission strategy consulting: separate line item

Only use alternatives when:

• Ultimate Affiliate Pro → client wants MLM/network marketing
• Solid Affiliate → WooCommerce-only store and simplicity matters

A couple of questions would change my recommendation:

1. Are these affiliate programs for your agency’s clients, or are you trying to create a referral program for your own agency?
2. By “multi-tier,” do you mean affiliate → sub-affiliate overrides (MLM-style), or just different commission levels/groups (VIP affiliates, partners, etc.)?

For a two-person WordPress agency, I’d recommend AffiliateWP.

It’s particularly strong for your use case because it is self-hosted, has a mature admin UI, and—most importantly—has a dedicated Multi-Tier Commissions add-on rather than requiring custom commission logic. AffiliateWP AffiliateWP

Why AffiliateWP is my first choice

• Multi-tier commissions: supports 2–5 tiers, with each tier configurable as a percentage, flat-per-product, or flat-per-order commission. AffiliateWP
• Actual referral hierarchy: affiliates can recruit affiliates, and the recruits automatically become part of the referrer's network. AffiliateWP
• Unilevel or forced-matrix structures: useful if a client eventually wants something more sophisticated than simple "affiliate gets 10%, their recruit gets 3%." AffiliateWP
• Good agency fit: the Pro license currently supports 5 sites, which is considerably more useful for an agency than a one-site license. AffiliateWP
• WooCommerce and other integrations: AffiliateWP supports WooCommerce plus numerous other WordPress commerce/form integrations. AffiliateWP
• Self-hosted: the affiliate program runs inside the client's WordPress installation rather than being dependent on an external affiliate SaaS platform. AffiliateWP
• It also covers the boring-but-important stuff: affiliate dashboards, tracking, fraud prevention, reporting, recurring/lifetime commissions and payouts. AffiliateWP AffiliateWP

affiliatewp.com

The main alternative: SliceWP

SliceWP is worth considering if your priority is simplicity and a lightweight client experience. It has a Multi-level Affiliates add-on where affiliates recruit sub-affiliates and receive additional commissions. SliceWP WordPress.org

slicewp.com

The distinction I'd make is:

One important terminology trap: "multi-tier" can mean two different things. AffiliateWP distinguishes multi-tier commissions (your affiliate recruits another affiliate and earns from their sales) from tiered affiliate rates (an individual affiliate's rate increases when they hit sales milestones). AffiliateWP

My pick for an agency: AffiliateWP Pro if you're building programs for multiple clients and expect anything beyond a basic referral scheme. The current Pro plan includes 5 sites and Multi-Tier Commissions. AffiliateWP

If you tell me whether your client sites are mostly WooCommerce, memberships, or lead-gen sites, I can narrow this down further and flag the licensing/setup issues I'd care about as an agency.

For a two-person agency building client sites on WordPress, I’d shortlist these:

🥇 My pick: AffiliateWP

AffiliateWP is probably the best fit if you want something you can standardize across client builds. It is explicitly self-hosted, runs inside WordPress, has WooCommerce integrations, affiliate dashboards, tracking, payouts, fraud controls, and a Multi-Tier Commissions add-on. affiliatewp.comaffiliatewp.com

The multi-tier add-on supports:

• Unilevel structures — essentially unlimited direct recruits and depth.
• Forced Matrix structures — configurable width and depth.
• Commission rules across the different levels. affiliatewp.comaffiliatewp.com

AffiliateWP official site

Why I'd choose it for an agency: it's mature enough that you can build a repeatable implementation pattern rather than introducing a niche plugin on every project.

🥈 SliceWP — simpler/admin-friendly alternative

SliceWP is worth considering if your priority is ease of setup and a clean client-facing experience. Its Multi-level Affiliates add-on lets you define multiple levels and commission rates. slicewp.com

One important distinction: SliceWP's percentage for an upper-level affiliate is calculated from the downline affiliate's commission, rather than directly from the sale. So if the sale is $100, the direct affiliate earns $20, and the next level gets 20% of that $20 = $4. slicewp.com

SliceWP official site

What I'd use for your agency

Bottom line: If "multi-tier" is a genuine requirement rather than just "affiliate gets a bonus for recruiting someone," I'd go with AffiliateWP. If your typical clients need a relatively straightforward 2–3-level referral program and you value simplicity more, SliceWP may be the nicer implementation.

One other option worth evaluating is Siren Affiliates, particularly if your clients aren't all WooCommerce sites; it supports tiered/override commissions and integrations beyond WooCommerce. wordpress.org

If you tell me what the client sites are selling (WooCommerce products, subscriptions, courses, services/leads, etc.) and what you mean by multi-tier (e.g. 20% direct + 5% recruiter + 2% recruiter-of-recruiter), I can narrow this to one plugin and the appropriate license/add-ons.

For a two-person WordPress agency, I’d shortlist AffiliateWP first, with SliceWP as the leaner alternative.

My pick: AffiliateWP

affiliatewp.com is probably the best fit if multi-tier commissions are a core requirement, rather than an occasional add-on.

• Self-hosted: runs directly inside the client's WordPress install, with affiliate data managed in WP.
• Multi-tier: its Multi-Tier Commissions add-on supports up to 5 tiers, with configurable percentages or flat commissions. It supports both Unilevel and Forced Matrix structures. AffiliateWP AffiliateWP
• Good agency fit: you can deploy it on client sites rather than introducing another SaaS platform.
• WooCommerce-friendly: particularly sensible if the sites sell products/subscriptions.
• Payouts: supports one-click/automated payouts, including Stripe and PayPal. AffiliateWP
• Fraud/tracking features: useful when you're going to be responsible for the program after launch.

The main downside is that multi-tier is a Pro/add-on feature, so it's not the cheapest option if your clients only need basic affiliate tracking. AffiliateWP

Alternative: SliceWP

slicewp.com is worth considering if you prioritize a simpler WordPress admin experience.

Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and configure multiple commission levels. SliceWP It also supports WooCommerce, EDD, MemberPress, Paid Memberships Pro and several other WordPress commerce/membership systems. SliceWP

One important distinction: SliceWP calculates percentage-based upline commissions from the referring affiliate's commission, rather than directly from the original sale. For example, with a $100 sale and a 20% direct commission, a 20% level-1 commission would be $4—not $20. SliceWP

So I'd choose:

For your agency specifically, I'd standardize on AffiliateWP if you're going to build several client affiliate programs. The more important question is whether your clients mean "two/three levels of referral commissions" or a genuine MLM-style compensation tree—AffiliateWP's current multi-tier functionality explicitly supports both unilevel and forced-matrix structures. AffiliateWP

If you tell me whether these sites are mostly WooCommerce, memberships, or lead-gen, I can narrow it down further and suggest the best license/setup for an agency deploying it across multiple clients.

For a two-person WordPress agency, I’d shortlist AffiliateWP first, with SliceWP as the simpler alternative.

My pick: AffiliateWP

AffiliateWP is particularly well suited to your requirement because it is explicitly self-hosted on WordPress and has a dedicated Multi-Tier Commissions add-on. It supports up to five tiers, with either a Unilevel structure or a Forced Matrix, and lets you configure commissions at each tier. affiliatewp.comaffiliatewp.com

For example, you could configure:

• Tier 1/referrer: 20%
• Tier 2/recruiter: 5%
• Tier 3: 2%
• etc.

You can also choose whether higher-tier commissions are calculated from the total sale or from the lower affiliate's commission, which is useful when you're designing the economics of the program. affiliatewp.comaffiliatewp.com

It also gives you the stuff I'd want an agency to have: WooCommerce and other integrations, affiliate dashboards, referral/coupon tracking, automated or one-click payouts, fraud detection, and flexible commission rules. affiliatewp.com

Runner-up: SliceWP

SliceWP is worth considering if your priority is simplicity and a pleasant WordPress-native admin experience. Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn additional commissions from their referrals. slicewp.com

It's particularly attractive for WooCommerce/client sites: it supports percentage or fixed commissions, affiliate-specific and product-specific rates, coupon tracking, reporting, and payouts. wordpress.org

What I'd deploy as an agency

Bottom line: If “multi-tier commissions” is a hard requirement rather than a nice-to-have, I'd standardize on AffiliateWP. Its multi-tier functionality is much more explicit and configurable, so you won't paint yourselves into a corner when a client eventually asks for 3–5 levels, different tier rates, or a matrix structure. affiliatewp.comaffiliatewp.com

One caveat: if by “multi-tier” you mean true MLM/network marketing with sophisticated matrix, rank, volume, bonuses, genealogy, etc., I'd evaluate dedicated MLM plugins rather than assuming a conventional affiliate plugin is sufficient. AffiliateWP's Forced Matrix support makes it more capable here, but the business rules should be tested carefully before standardizing it.

For a two-person agency building WordPress sites for clients, I’d shortlist these two, with AffiliateWP as my default recommendation.

1. AffiliateWP — best overall

This is probably the best fit if you want something you can confidently deploy on client sites and hand over to nontechnical clients.

• Self-hosted WordPress plugin — affiliate data lives in the client's WordPress installation; there are no platform commission fees. affiliatewp.comaffiliatewp.com
• Multi-tier commissions support 2–5 tiers, with configurable commission rates. affiliatewp.comaffiliatewp.com
• Supports both unilevel structures and forced-matrix structures if you need a more MLM-like hierarchy. affiliatewp.comaffiliatewp.com
• Strong WooCommerce integration, affiliate dashboard, tracking, fraud prevention, reporting, and payouts. affiliatewp.com
• The pricing is relatively agency-friendly: its current plans include licenses for 1, 2, or 5 sites, depending on tier. affiliatewp.comaffiliatewp.com

Why I'd choose it for an agency: it's mature enough that you're less likely to end up maintaining custom affiliate logic for every client, while still keeping everything inside WordPress.

2. SliceWP — best if simplicity is the priority

SliceWP is particularly appealing for a small agency because its UI and setup are intentionally straightforward.

Its Multi-level Affiliates add-on lets you create parent/sub-affiliate relationships and configure multiple commission levels. slicewp.comaffiliatewp.com It also supports WooCommerce, EDD, MemberPress, Paid Memberships Pro, and several other WordPress commerce/membership systems. slicewp.com

One important distinction: SliceWP's multi-level percentages are calculated from the referring affiliate's commission, rather than directly from the sale. For example, a $100 sale at 20% gives the direct affiliate $20; a 20% Level-1 commission would then give their parent $4. slicewp.comaffiliatewp.com

That can be exactly what you want, but it's worth understanding before choosing it.

What I'd pick

My recommendation: AffiliateWP if you're building this into multiple client sites and want a robust, reusable agency solution. SliceWP if your clients mostly need a straightforward referral program and you value a simpler WordPress-native experience.

One caveat: if by “multi-tier” you mean something unusual like unlimited depth, binary trees, forced matrices, spillover, rank bonuses, or MLM-style compensation, I'd evaluate the exact commission model before selecting the plugin. AffiliateWP explicitly supports unilevel and forced-matrix structures, while SliceWP's model is more straightforward parent → sub-affiliate levels. slicewp.comaffiliatewp.com

If you tell me whether the client sites are WooCommerce, membership sites, or lead-gen sites, I can narrow this down to the best plugin + licensing approach for a two-person agency.

For a two-person WordPress agency building client sites, I’d optimize for:

• self-hosted (client owns the data)
• easy handoff to non-technical clients
• multi-tier commissions (affiliate → sub-affiliate → parent commission)
• WooCommerce + membership/LMS compatibility
• minimal maintenance burden

My top pick would be:

1. AffiliateWP — best overall agency choice

affiliatewp.com

Why I’d choose it for an agency:

• Mature WordPress-native affiliate platform
• Strong ecosystem and documentation
• Works with WooCommerce, Easy Digital Downloads, memberships, forms, and other WordPress stacks
• Supports multi-tier commissions through its advanced features/add-ons
• Good affiliate dashboards, tracking, reporting, and payouts AffiliateWP

Best fit: clients selling services, courses, memberships, digital products, or WooCommerce products.

Downside: the more advanced commission structures can push you into higher-priced tiers/add-ons. Oxygen Builder

2. SliceWP — best value / easier client handoff

slicewp.com

Good if your clients need something simpler:

• clean UI
• easier setup
• WooCommerce support
• recurring commissions and multi-level affiliate features are available depending on configuration/tier WP All Import

Best fit: smaller businesses that want an affiliate program but don’t need a giant marketing system.

Downside: less of an “enterprise affiliate platform” feel than AffiliateWP.

3. Solid Affiliate — best if most clients are WooCommerce stores

solidaffiliate.com

Strong WooCommerce-first option:

• deep WooCommerce integration
• product/category/affiliate commission rules
• polished admin experience Breakdance

Best fit: ecommerce clients where affiliates promote products.

Downside: less attractive if you build lots of non-WooCommerce sites.

My agency recommendation

For your situation, I’d standardize on:

If you want one plugin you can deploy repeatedly across client sites, I’d pick AffiliateWP because it gives you the fewest “we need a different plugin for this client” situations. AffiliateWP Oxygen Builder

One question that changes the recommendation: when you say multi-tier commissions, do you mean:

1. affiliate groups (different commission rates by partner level), or
2. true MLM-style recruiting (Affiliate A earns 5% from Affiliate B’s sales)?

Those are handled very differently in WordPress plugins.

My agency recommendation

For your situation, I’d standardize on:

For a two-person agency building client WordPress sites, I’d recommend affiliatewp.com.

It’s particularly well suited if by “multi-tier” you mean a genuine referral hierarchy—e.g. Affiliate A recruits B, and A gets an override commission when B makes a sale.

Why AffiliateWP

• Self-hosted: It runs inside WordPress, with your affiliate data living on the client’s site rather than in a separate affiliate SaaS. AffiliateWP
• Actual multi-tier support: Its Multi-Tier Commissions add-on supports up to five tiers, with percentage or flat commissions. It also supports either a unilevel structure or a forced matrix. AffiliateWP
• Good agency fit: You can install it on client sites and manage the affiliate program from the WordPress admin. AffiliateWP
• WooCommerce support: It integrates with WooCommerce and supports affiliate tracking and payouts. AffiliateWP
• Payouts: Current versions support automated/one-click payouts, including Stripe and PayPal. AffiliateWP
• Commission flexibility: You can use global, affiliate-specific, and product-specific rates; an additional Product Rates extension provides even finer-grained control. WordPress.org

One alternative worth considering

slicewp.com is probably the one I'd compare directly against it. It's nicely designed and particularly pleasant for small agencies, with WooCommerce, EDD and membership integrations. WordPress.org SliceWP

However, AffiliateWP wins for your specific requirement because multi-tier commissions are a first-class, documented feature with configurable tier structures. SliceWP also has a “Multi-level Affiliates” add-on, but I'd choose AffiliateWP if the multi-tier hierarchy itself is a core requirement. AffiliateWP WordPress.org

My agency-oriented pick

Bottom line: If you're going to standardize one affiliate solution across client builds, I'd make AffiliateWP + Multi-Tier Commissions your default. If most clients just need a straightforward one-level referral program and you value a particularly simple admin experience, keep SliceWP in your toolkit too. AffiliateWP AffiliateWP

If you tell me what your clients are selling (WooCommerce products, subscriptions, SaaS referrals, services/leads, courses, etc.), I can narrow this down further and suggest the cheapest license/add-on combination for an agency.

For a two-person agency building client WordPress sites, my first pick would be SliceWP, specifically with its Multi-Level Affiliates add-on.

Why SliceWP fits

• Self-hosted: the affiliate data and management live inside the client's WordPress installation; SliceWP explicitly says there are no additional commission fees. slicewp.comslicewp.comaffiliatewp.com
• Multi-tier: its Multi-Level Affiliates add-on lets affiliates recruit sub-affiliates and earn additional commissions from their sales. wordpress.org
• Good agency fit: it supports installation on client sites, and integrates with WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, etc. slicewp.comslicewp.comaffiliatewp.com
• Flexible commissions: percentage or fixed commissions, with customization at affiliate/product/group levels. slicewp.com
• Reasonable operational UX: affiliate registration, dashboards, tracking, approvals, reporting and payouts are handled from WordPress rather than requiring a separate SaaS. slicewp.com

One alternative I'd seriously consider

AffiliateWP is worth evaluating if you expect clients to build more sophisticated MLM-style structures. Its Multi-Tier Commissions add-on supports both Unilevel and Forced Matrix compensation plans, including configurable matrix width/depth. affiliatewp.com

That's considerably more elaborate than most ordinary "affiliate recruits affiliate" programs, though—and potentially more complexity than a two-person agency wants to maintain.

One I'd skip for this requirement

Solid Affiliate has a very polished WooCommerce experience, but it explicitly does not support multi-level marketing, so it doesn't meet your multi-tier requirement. solidaffiliate.com

My shortlist:

GoAffPro supports up to 10 affiliate levels with separate commissions per level, but its WordPress plugin setup continues through a GoAffPro account, so I'd favor SliceWP if "self-hosted" means the program should fundamentally live on the client's own WordPress stack. wordpress.org

Bottom line: for your agency, I'd standardize on SliceWP + Multi-Level Affiliates unless a particular client needs a true forced-matrix/MLM compensation plan.

For a two-person agency building WordPress sites, I’d shortlist AffiliateWP first, with SliceWP as the main alternative.

My pick: AffiliateWP

AffiliateWP is particularly well-suited if multi-tier commissions are a core requirement rather than an occasional add-on.

• Self-hosted: runs inside WordPress, with your affiliate data in your site rather than on a separate affiliate SaaS platform. affiliatewp.com
• Multi-tier commissions: its Multi-Tier Commissions add-on supports up to 5 tiers, with percentage, flat-per-product, or flat-per-order commissions. affiliatewp.com
• Supports both Unilevel structures and Forced Matrix structures, so you have room to implement more sophisticated referral hierarchies if a client needs them. affiliatewp.com
• Has affiliate dashboards, tracking, fraud detection, reporting, and payout tooling, which reduces the amount of custom admin work your agency has to maintain. affiliatewp.com
• It integrates with WooCommerce and a fairly broad set of other WordPress commerce/form plugins. affiliatewp.com

For an agency, I'd value the maturity + breadth of integrations over saving a little on the plugin license.

Strong alternative: SliceWP

SliceWP is worth considering if you prioritize simplicity and a clean WordPress-native UX.

Its Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn commissions from their downline. slicewp.com It also has WooCommerce, EDD, MemberPress, Paid Memberships Pro, and other integrations. affiliatewp.comwordpress.org

One important distinction: SliceWP's multi-level percentages are calculated from the referring affiliate's commission, rather than directly from the underlying sale. For example, on a $100 sale with a $20 primary commission, a 20% level-1 commission would be $4. slicewp.com

So I'd choose:

Bottom line: For your agency, I'd standardize on AffiliateWP + Multi-Tier Commissions if clients genuinely need multi-level/downline commissions. If most clients just need a straightforward affiliate program with 2–3 referral levels, SliceWP may be the leaner, nicer-to-administer choice.

One thing I'd clarify before committing: if by "multi-tier" you mean performance tiers (e.g. 10% until $5k sales, then 15%), rather than multi-level/downline commissions, that's a different requirement and I'd choose differently.

For a two-person WordPress agency, I’d optimize for: low maintenance, self-hosted data, good WooCommerce/client-site compatibility, and a clean admin experience you can hand off to clients. For multi-tier commissions, my shortlist would be:

1. AffiliateWP — best overall choice

AffiliateWP official website

My top recommendation for an agency building client sites.

Why it fits:

• Fully self-hosted in WordPress (client owns the data)
• Mature ecosystem and documentation
• Strong WooCommerce + form/membership integrations
• Affiliate dashboards, tracking, payouts, fraud controls
• Multi-tier commissions are available via its add-on, including configurable tiers and compensation structures. affiliatewp.com

Good agency use cases:

• SaaS-style WordPress products
• Membership sites
• Course creators
• WooCommerce stores
• Clients who may need a “real” affiliate program rather than a referral coupon system

Downside:

• More expensive than simpler plugins
• Some advanced features are add-ons

2. SliceWP — best value / easiest client handoff

SliceWP official website

This is probably the one I’d pick if your agency frequently launches smaller client sites.

Strengths:

• Very WordPress-native UI
• Easier for non-technical clients to understand
• Good WooCommerce support
• Multi-level affiliate add-on supports parent/sub-affiliate structures and commission levels. slicewp.com

Good fit:

• Local businesses
• Small ecommerce stores
• Creators/influencers
• Clients who need “affiliate partners” rather than a complex network

Downside:

• Less enterprise-oriented than AffiliateWP

3. Solid Affiliate — consider for WooCommerce-heavy clients

Solid Affiliate official website

Worth considering if most of your builds are WooCommerce.

Strengths:

• Built specifically around WooCommerce
• Polished merchant workflows
• Good for stores where affiliates are a major sales channel

Downside:

• Less broadly useful if your clients aren't ecommerce-focused

What I would avoid for your agency

• Hosted SaaS affiliate platforms (Rewardful, FirstPromoter, etc.) unless the client specifically wants SaaS tooling — you lose WordPress-native ownership.
• Old MLM plugins that market “unlimited levels” but have poor code quality/support. Multi-tier affiliate programs are already complex; plugin reliability matters.

My agency pick

If I were standardizing a plugin stack for a two-person WordPress agency:

One practical agency tip: build a reusable starter install with your affiliate plugin, payout workflow, email templates, and reporting configuration. Affiliate systems tend to become support-heavy if every client gets a different setup.

For a two-person WordPress agency, my first choice would be AffiliateWP.

It’s a particularly good fit if you want the affiliate system to live entirely inside the client’s WordPress installation rather than depending on an external SaaS platform.

My shortlist

Why AffiliateWP: It has a mature WordPress-native setup, affiliate dashboards, reliable referral tracking, payouts, fraud controls, and—crucially—its Multi-Tier Commissions add-on supports both Unilevel networks and Forced Matrix structures. affiliatewp.com

For example, you can configure:

Affiliate A → recruits B → recruits C
A gets 5% override on B's sales
B gets 10% on C's sales
C gets 20% on their own sales

That is much closer to what I'd expect you mean by "multi-tier" than merely having different commission rates for different affiliate tiers.

One alternative I'd seriously consider

SliceWP is attractive if your agency values simplicity and a clean client-facing UI over elaborate compensation structures. Its premium Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn additional commissions from their sales. It also supports WooCommerce, EDD, memberships, recurring commissions, affiliate coupons, etc. wordpress.org

What I'd pick for your agency

• Mostly WooCommerce client sites + conventional 2–3 level commissions: AffiliateWP
• You want the least admin complexity: SliceWP
• Clients will ask for MLM-style matrices, unilevel trees, ranks, spillover, etc.: AffiliateWP or Affilia
• You need broader partner/reseller/revenue-share logic, not just affiliates: Siren Affiliates wordpress.org

One important agency consideration: license economics and whether one license can cover all your client installs can change the recommendation substantially. If you tell me roughly how many client sites you'd deploy it on, whether they're WooCommerce, and how many commission levels you need, I can narrow this down to the best plugin/license setup for an agency.

For a two-person WordPress agency, I’d shortlist these:

1. AffiliateWP — best overall fit
   • Self-hosted/native WordPress.
   • Explicitly supports multi-tier commissions, so it fits your requirement without cobbling together an MLM add-on. affiliatewp.com
   • Strong WooCommerce support, affiliate dashboards, tracking, fraud controls, and payouts.
   • Particularly attractive if you’ll deploy it across multiple client sites and want a mature, agency-friendly product.
   • My pick if “multi-tier” is a hard requirement and you want the least architectural fuss.

2. SliceWP — best if simplicity matters
   • Very WordPress-native and designed around a straightforward admin experience.
   • Supports WooCommerce, EDD, MemberPress, Paid Memberships Pro, etc. slicewp.com
   • Its Multi-level Affiliates feature allows affiliates to recruit sub-affiliates and earn additional commissions. wordpress.org
   • Good choice if your client sites aren't all WooCommerce stores.

3. GoAffPro — strongest explicit multi-level option
   • Supports up to 10 affiliate levels, with commission rates configurable for each level. wordpress.org
   • Worth considering if your clients specifically want a fairly deep referral hierarchy.
   • The tradeoff is that its WordPress plugin leans on the GoAffPro service/account, so it's less compelling if by “self-hosted” you mean all affiliate-program data and logic must live on the client's WordPress installation. wordpress.org

One I'd skip

Solid Affiliate is otherwise an excellent agency/client-site choice, but its own documentation explicitly says it does not support multi-level marketing. solidaffiliate.com

What I'd choose

If your requirement is something like:

Affiliate A recruits Affiliate B → B makes a sale → B gets 20%, A gets a 5% override

I'd go with AffiliateWP first, and SliceWP second.

One important distinction: if by “multi-tier” you mean simple tiered commission rates (e.g. affiliates at Bronze/Silver/Gold levels), rather than upline/downline commissions, several plugins can do that. If you mean actual A → B → C referral hierarchy with overrides, I'd prioritize the latter functionality when evaluating.

If you tell me whether the client sites are WooCommerce, EDD, membership/subscription sites, or mostly lead-gen, I can narrow this to one plugin and compare license cost, multi-tier mechanics, agency/multisite licensing, and client handoff.

For a two-person WordPress agency, I’d recommend AffiliateWP as the default choice.

Why AffiliateWP

• Self-hosted: the affiliate data and management live inside the client’s WordPress installation, rather than being dependent on an external affiliate SaaS. affiliatewp.com
• Multi-tier commissions: its Multi-Tier Commissions add-on supports up to 5 tiers, with configurable percentage or flat commissions at each level. It supports both Unilevel and Forced Matrix structures. affiliatewp.com
• Good agency fit: it integrates with WooCommerce plus a broad range of ecommerce/form plugins, so you aren't locked into one type of client site. affiliatewp.com
• Client-friendly operations: affiliate registration/approval, dashboards, tracking, reporting, coupons, and payouts are managed from WordPress. affiliatewp.com
• No transaction percentage: AffiliateWP says it doesn't take a cut of affiliate commissions. affiliatewp.com

Runner-up: SliceWP

SliceWP is worth considering if you prioritize a particularly simple UI and primarily build WooCommerce/EDD sites. Its paid Multi-level Affiliates add-on lets affiliates recruit sub-affiliates and earn additional commissions from their sales. wordpress.org

For an agency, though, I'd lean AffiliateWP because the multi-tier system is more explicitly configurable: you can define 2–5 tiers and choose Unilevel vs. Forced Matrix. affiliatewp.com

My pick: AffiliateWP + Multi-Tier Commissions.

One important distinction: if by “multi-tier” you mean something like Affiliate A gets 20% of their own sale, Affiliate B gets 5% of A's referred sales, Affiliate C gets 2% above that, AffiliateWP is a strong fit. If you instead need a highly customized MLM compensation plan with complex ranks, bonuses, spillover rules, etc., I'd evaluate dedicated MLM software rather than a conventional WordPress affiliate plugin.

For a two-person WordPress agency, I’d optimize for something that is:

• self-hosted (client owns the data)
• easy to hand off to non-technical clients
• supports multi-tier commissions (affiliate → sub-affiliate → deeper levels)
• doesn’t create a maintenance burden

My shortlist:

wordpress.orgwpmayor.com

My recommendation: AffiliateWP + Multi-Tier Commissions

For an agency building client sites, I’d usually choose AffiliateWP. It has a mature WordPress ecosystem, good integrations, and keeps everything inside the client’s WordPress install. Its multi-tier add-on supports layered commissions, and it has tooling around payouts, tracking, and affiliate management. affiliatewp.com

A typical setup could be:

• Level 1 affiliate: 20% commission on referred sales
• Level 2 recruiter: 5% override when their affiliate makes a sale
• Level 3: optional 2% override

That’s usually enough for partner/referral programs without drifting into full MLM complexity.

When I’d pick Ultimate Affiliate Pro instead

If your clients specifically want:

• unlimited/downline-style structures
• rank systems
• bonus rules
• more MLM-like incentives

then Ultimate Affiliate Pro is worth evaluating. It is more focused on multi-level setups out of the box, whereas many mainstream affiliate plugins treat tiers as an extension of a normal affiliate program. wordpress.orgwpmayor.com

When I’d pick SliceWP

For a small business client that says:

“We just need a referral program where partners can sign up and earn commissions”

SliceWP is attractive because it is simpler to configure and has a polished affiliate dashboard. Its multi-level affiliate capability is available as a premium feature. wordpress.orgaffiliatewp.com

Agency workflow suggestion

For your stack, I’d standardize:

1. AffiliateWP as your default build
2. Create a reusable onboarding checklist:
   • commission rules
   • cookie duration
   • payout schedule
   • approval workflow
   • affiliate terms/privacy language
3. Build a staging template with:
   • affiliate registration page
   • dashboard page
   • email templates
   • test affiliate accounts

I’d avoid building client programs on SaaS affiliate platforms unless they specifically need cross-site tracking or want someone else handling infrastructure.

One caveat: if by “multi-tier” you mean true MLM compensation (unlimited genealogy trees, ranks, team volume bonuses), I’d avoid promising that a normal affiliate plugin can handle it cleanly. That’s usually where custom development or a dedicated MLM platform becomes necessary. ultimateaffiliate.pro

For a two-person agency, I’d recommend SliceWP + its Multi-level Affiliates add-on.

SliceWP official site

Why SliceWP fits your setup

• Self-hosted: it runs inside WordPress and keeps affiliate data on the client’s site; SliceWP explicitly says there are no commission fees charged by SliceWP itself. slicewp.com
• Multi-tier commissions: the Multi-level Affiliates add-on lets an affiliate recruit sub-affiliates and earn overrides on their sales. You can define multiple levels and rates. slicewp.com
• Good agency workflow: you can install it on client sites, and it integrates with WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, and other WordPress commerce/membership systems. slicewp.com
• Normal affiliate-program features: affiliate registration/approval, tracking, commission management, dashboards, reporting, payouts, coupon attribution, etc. wordpress.org
• Flexible commissions: direct affiliates can use percentage or fixed commissions, with custom rates possible at affiliate/product/category level. slicewp.com

One important gotcha

SliceWP's multi-level percentages are calculated as a percentage of the referring affiliate's commission, rather than as a percentage of the underlying sale.

For example, if a $100 sale produces a $20 direct commission and your Level 1 override is 25%, the parent gets $5, not $25. slicewp.com

So if your intended structure is something like:

Customer → Affiliate gets 20% → Affiliate's parent gets 5% of the sale → Grandparent gets 2%

I'd test the exact math before committing.

Alternatives I'd consider

WC Affiliate Pro is worth looking at if your clients are overwhelmingly WooCommerce stores. It advertises unlimited affiliate tiers with different commission rates per level, plus coupon tracking, automated PayPal/Stripe payouts, and cross-domain tracking. wordpress.org

GoAffPro supports up to 10 affiliate levels, with separate commissions for each level, but its architecture is more service/app-oriented than what I'd choose if "self-hosted" is a hard requirement. wordpress.org

My pick

For a small agency, I'd standardize on SliceWP unless your clients specifically need a commission model that SliceWP's percentage-of-commission calculation can't represent. The fact that it is WordPress-native, has no per-commission fee, and has a dedicated multi-level add-on makes it a particularly sensible agency-stack choice. slicewp.com

If you tell me how many tiers you need and an example commission structure (e.g. direct = 20%, parent = 5%, grandparent = 2%), I can tell you which plugin actually models the math correctly rather than just supporting "multi-level" in marketing terms.

For a two-person agency managing client WordPress sites, I’d shortlist these, with SliceWP as the best overall fit.

1. SliceWP — my pick

It runs directly inside WordPress, so the affiliate data and management live on the client’s site rather than in a separate SaaS platform. It supports WooCommerce, Easy Digital Downloads, MemberPress, Paid Memberships Pro, and other common WordPress commerce/membership setups. slicewp.comslicewp.com

Most importantly for you, its Multi-level Affiliates add-on supports parent → sub-affiliate relationships and configurable commission levels. You can define multiple levels and specify either percentage or fixed commissions. slicewp.comslicewp.com

Why I'd choose it for an agency:

• Self-hosted in WordPress
• Multi-tier commissions are a first-class feature
• Affiliate registration/approval and dashboards
• Per-affiliate, product, and category commission rules
• PayPal payouts
• No percentage fee on commissions
• Reasonably approachable for a small agency to deploy repeatedly across client sites slicewp.com

One important gotcha: multi-level percentages are calculated from the referring affiliate's commission, rather than directly from the sale amount. So if the direct affiliate gets 20% and their parent gets 10% of that commission, the parent effectively receives 2% of the sale. slicewp.comslicewp.com

2. GoAffPro — worth considering if you need deeper MLM-style tiers

GoAffPro on WordPress.org supports up to 10 affiliate levels, with a commission setting for each level. It also has recurring commissions, commission tiers, bonuses, and targets. wordpress.org

The tradeoff is that it feels more like a service/app integrated with WooCommerce than a purely WordPress-native affiliate-management system, which I'd consider if multi-level complexity is more important than keeping everything comfortably inside WP.

3. Siren Affiliates — interesting for sophisticated partner structures

Siren Affiliates specifically supports tiered programs, senior-partner overrides, VIP/standard rates, and manager overrides. It also supports WooCommerce and several non-WooCommerce integrations. wordpress.org

I'd look at this if your clients are doing agency/reseller/channel-partner programs, rather than conventional "affiliate sends customer → affiliate gets commission."

My recommendation

For your agency, I'd start with SliceWP Pro + Multi-level Affiliates. It's the best balance of native WordPress operation, reasonable complexity, and enough functionality that you won't have to build an affiliate system yourself. slicewp.comslicewp.com

One architectural question I'd settle before standardizing it for clients is whether your "multi-tier" model means A recruits B, A receives an override on B's sales or something more like tiered commission rates based on affiliate performance. SliceWP handles the former particularly well; the latter may push you toward a different choice.

For a two-person WordPress agency, I’d shortlist these:

My pick: AffiliateWP

AffiliateWP is probably the safest choice if you want something you can deploy repeatedly for clients and not babysit.

• Self-hosted: affiliate data and management live in WordPress; there’s no external affiliate marketplace/platform fee. affiliatewp.comaffiliatewp.com
• Multi-tier commissions: its Multi-Tier Commissions add-on supports up to 5 tiers, with percentage, flat-per-product, or flat-per-order commissions. affiliatewp.com
• Supports both unilevel networks and forced-matrix structures, so it can handle more sophisticated referral programs if a client eventually needs them. affiliatewp.com
• WooCommerce integration, affiliate dashboards, tracking, fraud prevention, and automated/one-click payouts are already covered. affiliatewp.comaffiliatewp.com
• The Pro plan currently lists 5 site licenses, which is particularly relevant for an agency managing several client sites. affiliatewp.comaffiliatewp.com

The downside: it isn't the cheapest option, and its breadth can mean more configuration than a small client actually needs.

Runner-up: SliceWP

SliceWP is worth serious consideration if your agency prioritizes a simpler WordPress-native experience. It has a free core plugin, and its premium Multi-level Affiliates feature lets affiliates recruit sub-affiliates and earn additional commissions from their sales. slicewp.com

It also has useful agency/client features such as custom affiliate rates, product-specific rates, recurring/lifetime commissions, PayPal payouts, reporting, and CSV data export. slicewp.com

What I'd choose

For your agency, I'd buy AffiliateWP Pro if you expect multi-tier affiliate programs to be a recurring client requirement. The 5-site license plus the mature tracking/payout/fraud tooling makes it easier to standardize your implementation across clients. affiliatewp.comaffiliatewp.com

One important caveat: if by “multi-tier” you simply mean “affiliate gets 20%, their referrer gets 5%”, both products can handle that. If you mean a genuine MLM-style structure with depth/width rules, AffiliateWP is the one I'd favor, because its forced-matrix and unilevel models are explicitly designed for that. affiliatewp.com

If you tell me whether your client sites are mostly WooCommerce, membership/subscription sites, or custom WordPress sites, I can narrow this down further and suggest the cheapest agency-friendly stack.

For a two-person WordPress agency building client sites, I’d optimize for: low maintenance, good WooCommerce/member integrations, client-friendly dashboards, and not having to babysit a SaaS affiliate platform.

My top picks:

1. WordPress affiliate management plugin — best overall for agency work

urlAffiliate

For a two-person agency managing client WordPress sites, I’d shortlist these:

1. AffiliateWP — my overall pick

This is probably the safest choice if you want something you can deploy repeatedly for clients.

• Self-hosted: runs inside WordPress; affiliate data stays on the site.
• Multi-tier commissions: supports up to 5 tiers, with percentage or flat commissions. affiliatewp.comslicewp.com
• Strong WooCommerce integration and a mature ecosystem.
• Includes affiliate portals, tracking, reporting, coupons, recurring/lifetime commissions and payout options.
• The Pro plan currently includes multi-tier commissions and licenses for 5 sites. affiliatewp.com
• Good fit if you expect your clients' programs to become sophisticated.

Downside: it can be more feature-heavy than you need for a small client site, and the pricing is relatively high.

2. SliceWP — best for simplicity

I'd seriously consider this if your agency values quick implementation and a clean WordPress-native experience.

Its Pro version supports multi-level affiliates, where affiliates can recruit sub-affiliates and earn additional commissions from their sales. wordpress.orgslicewp.com

It also supports WooCommerce, EDD, MemberPress, Paid Memberships Pro and several other WordPress commerce systems. slicewp.com

Why it appeals to a 2-person agency: less infrastructure to learn and administer, while still giving you affiliate registration, tracking, commissions, reporting and payouts.

3. Solid Affiliate — best if WooCommerce is central

Solid Affiliate has very flexible commission rules—per affiliate, product or group—and supports recurring commissions and revenue sharing. solidaffiliate.com

I'd put it behind AffiliateWP/SliceWP specifically because multi-tier is a key requirement for you; I'd verify the exact hierarchy behavior you need before standardizing on it.

What I'd standardize on

My recommendation: standardize on SliceWP Pro if most clients just need a straightforward 2–3-level referral program; choose AffiliateWP Pro if you want one "agency standard" capable of handling more complicated programs.

One important distinction: if by multi-tier you mean "affiliate A recruits B, B recruits C, and A gets a percentage of B/C's sales", rather than merely different commission rates for different affiliate tiers, make sure you're buying the multi-level/multi-tier referral feature, not just a plugin's "tiered commission rates." SliceWP and AffiliateWP both explicitly support the former. affiliatewp.comslicewp.com

If you tell me what your clients use for checkout (WooCommerce, MemberPress, SureCart, Stripe, etc.) and whether you need 2, 3, or 5+ levels, I can narrow it to one.

For a two-person WordPress agency, I’d optimize for: low maintenance, client-friendly dashboards, predictable licensing, and a plugin you can hand off without becoming their affiliate-program support desk.

My shortlist:

slicewp.com

My recommendation for your situation: SliceWP Pro + Multi-level Affiliates

For a two-person agency doing client builds, I’d lean this way.

Why:

• Native WordPress plugin (self-hosted; data stays in the client WP install)
• Less “enterprise” overhead than AffiliateWP
• Multi-tier commissions are supported through their add-on: affiliates can recruit sub-affiliates and earn commissions from referred sales. slicewp.com
• Easier to explain to clients who just want “affiliate tracking + payouts” rather than a huge affiliate platform

A typical setup:

• Tier 1 affiliate: 20% direct sale commission
• Tier 2 recruiter: 5% override on sales from affiliates they brought in
• Optional Tier 3: 2% override

When I’d choose AffiliateWP instead

Pick AffiliateWP if you’re building:

• membership/referral systems
• SaaS-like products
• large affiliate networks
• sites needing many integrations

It’s more mature and has multi-tier commissions included in higher-tier offerings. slicewp.comaffiliatewp.com

When I’d choose Solid Affiliate

Pick Solid Affiliate if your client sites are mostly:

• WooCommerce stores
• product catalogs
• subscription shops

It has strong WooCommerce-focused features like flexible commission rates, affiliate portals, payouts, and recurring/lifetime commission options. solidaffiliate.com

One thing I’d avoid

I’d avoid building client affiliate programs around SaaS platforms that inject tracking externally unless the client specifically wants that. For a WordPress agency, a self-contained plugin makes migrations, ownership, and maintenance much cleaner.

If you’re mainly building brochure sites with referral programs for agencies/consultants rather than WooCommerce stores, my ranking would change slightly.

For a two-person agency building WordPress sites for clients, I'd prioritize a plugin that's:

• Self-hosted (client owns the data)
• Easy to hand off to non-technical clients
• Supports multi-tier commissions (2+ levels)
• Actively maintained
• Works well with WooCommerce and common membership/payment plugins

Here's how I'd rank the current options:

1. AffiliateWP (my recommendation)

For agency work, this is the safest long-term choice.

Pros:

• Mature product with a large install base
• Multi-tier commissions
• Excellent WooCommerce integration
• Easy affiliate dashboard
• One-click payouts
• Lots of add-ons and developer hooks
• Easy to customize for client projects

It's also one of the plugins clients are most likely to recognize later, which makes support and future maintenance easier. affiliatewp.com

2. Siren Affiliates

This is interesting if your clients aren't running a classic affiliate program.

It supports:

• affiliate programs
• agency referral programs
• revenue sharing
• royalties
• partner incentives
• manager overrides
• multi-level commissions

If you have SaaS, coaching, creator, or marketplace clients, Siren is arguably more flexible than AffiliateWP because it isn't limited to "affiliate marketing" as the core model. www.sirenaffiliates.com

3. FluentAffiliate

Worth watching if you're already using FluentCRM, FluentForms, or the WPManageNinja ecosystem.

It's newer but focuses on:

• self-hosting
• performance
• straightforward UI
• integrations with modern WordPress plugins

I'd be comfortable deploying it on newer projects, but for mission-critical affiliate programs I'd still lean toward AffiliateWP today. wordpress.org

4. WC Affiliate

If every client is on WooCommerce and cost matters, this is a solid option.

Pro features include:

• unlimited commission levels
• coupon attribution
• PayPal/Stripe payouts
• cross-domain tracking
• custom registration forms

It packs a lot into the Pro version. wordpress.org

What I'd standardize on as an agency

• 80% of clients: AffiliateWP
• Clients with complex partner/revenue-sharing models: Siren Affiliates
• Budget WooCommerce projects: WC Affiliate Pro

That gives you a consistent stack without locking clients into a SaaS platform or recurring per-affiliate fees.

One question that affects the recommendation: are your clients mostly WooCommerce stores, membership/course sites, or lead-generation businesses?

For a two-person WordPress agency, I’d optimize for: low maintenance, good client handoff, self-hosted data, and a multi-level commission tree that doesn’t require custom development.

My shortlist:

My recommendation for your agency: AffiliateWP

For a two-person shop building sites for clients, I’d pick AffiliateWP Pro if the affiliate program is a meaningful revenue channel. It gives you:

• self-hosted WordPress data
• affiliate dashboards you can hand off to clients
• multi-tier commissions
• recurring/lifetime commission options
• fraud controls
• payout workflows
• broad ecosystem support affiliatewp.com

A typical agency use case:

• Client sells a SaaS product/course/membership
• Affiliate recruits another affiliate
• Tier 1 gets 20% of direct sales
• Tier 2/upline gets 5% override
• You manage approvals and payouts inside WP

When I’d choose SliceWP instead

If most of your clients are small businesses and you want something your team can deploy quickly, SliceWP is attractive. Its multi-level add-on handles affiliate recruitment trees without the heavier feature set. wordpress.org

One caution

Avoid plugins marketed as “MLM” systems unless the client specifically needs a network structure. Many affiliate programs only need two-level overrides, not a full multi-level marketing engine.

For an agency workflow, I’d probably standardize on:

1. AffiliateWP Pro as your default package
2. SliceWP as the budget/simple option
3. Custom development only when a client needs unusual commission rules

If you tell me whether these affiliate programs are for WooCommerce stores, SaaS subscriptions, memberships, or lead-generation sites, I can narrow it down further.

For a two-person agency building WordPress sites, I'd prioritize a plugin that's:

• Self-hosted (affiliate data stays on your client's site)
• Stable and actively maintained
• Easy for non-technical clients to manage
• Supports multi-tier (MLM-style) commissions if that's a hard requirement
• Integrates with WooCommerce, Easy Digital Downloads, Stripe, etc.

Here are the strongest options:

1. AffiliateWP (my top recommendation)

Pros:

• Mature and well-maintained
• Excellent developer documentation
• Clean database structure
• Good reporting
• Easy for clients to understand
• Agency-friendly licensing

Multi-tier support:

• Available through their Multi-Tier Commissions add-on
• Configure parent/child affiliate relationships
• Set different commission percentages for each level

Good if your clients want:

• Professional affiliate management
• Reliability over hundreds of affiliates
• Future integrations

Potential downside:

• Several advanced features are separate add-ons.

2. SliceWP

A strong newer alternative.

Pros:

• Cleaner interface than many legacy plugins
• Multi-level affiliate support in Pro
• WooCommerce integration
• Easy onboarding

I often recommend it for smaller businesses because clients tend to learn it quickly.

3. Solid Affiliate

Especially good if almost every client uses WooCommerce.

Pros:

• Built specifically for WooCommerce
• Modern UI
• Good fraud prevention
• Multi-tier commissions
• Lifetime commissions
• Automatic payouts

If your agency mostly builds WooCommerce stores, this is worth serious consideration.

4. Ultimate Affiliate Pro

If the client specifically asks for:

• MLM-like structures
• Multiple commission levels
• Rank systems
• Bonuses
• Performance rewards
• Matrix or forced-matrix style payouts

...this plugin probably has the most built-in functionality.

Trade-offs:

• Much larger feature set
• More configuration
• UI isn't as polished
• More support requests from clients

What I'd use for different client types

Small WooCommerce store

• SliceWP
• Solid Affiliate

Growing SaaS or membership site

• AffiliateWP

Large affiliate marketing business

• AffiliateWP

Client specifically wants MLM or 5+ commission levels

• Ultimate Affiliate Pro

Agency perspective

If you're supporting many client sites, standardizing on AffiliateWP usually pays off because:

• predictable updates
• good documentation
• fewer support headaches
• easier developer customization
• strong ecosystem

If multi-tier commissions are a core requirement on every project, I'd compare AffiliateWP and Ultimate Affiliate Pro first. AffiliateWP is generally the cleaner long-term choice, while Ultimate Affiliate Pro offers more built-in commission models without custom development.

For a two-person WordPress digital agency, I’d prioritize something that is:

• Self-hosted (data stays in WordPress, no SaaS affiliate network)
• Client-friendly (you can hand off management)
• Reliable tracking
• Supports multi-tier commissions (affiliate → sub-affiliate/upline)
• Doesn’t become a maintenance burden

My top recommendation:

1. AffiliateWP — best overall choice

AffiliateWP official site

Best fit for: agencies building client sites where the affiliate program needs to feel professional.

Pros:

• True WordPress-native/self-hosted affiliate management
• Good admin UX for non-technical clients
• Affiliate dashboards included
• Referral link + coupon tracking
• WooCommerce and many membership/payment integrations
• Multi-tier commissions available in higher plans/add-ons affiliatewp.comaffiliatewp.com
• No transaction percentage taken from commissions affiliatewp.comaffiliatewp.com

Cons:

• Multi-tier functionality is not the cheapest tier
• If you need a complex MLM structure (binary trees, rank bonuses, etc.), it may feel limited

My agency use case recommendation:
Sell it as part of your “affiliate system setup” package. Install it, configure commission rules, create onboarding pages, and hand the client a clean dashboard.

2. WC Affiliate — good if clients are WooCommerce-heavy

WC Affiliate official site

Best for:

• Ecommerce stores
• WooCommerce product commissions
• Clients who specifically want multi-level affiliate trees

It supports multi-level commissions in its Pro version and is more focused around WooCommerce workflows. wordpress.org

Pros:

• Strong WooCommerce fit
• Multi-level setup
• Affiliate dashboards

Cons:

• Less established ecosystem than AffiliateWP
• I’d be more cautious putting it on a high-value client site without testing their exact workflow

3. Affilia – Affiliate Program — only if they mean “MLM”

If by “multi-tier” you mean something like:

• Recruiter earns 10%
• Their recruiter earns 5%
• Their recruiter’s recruiter earns 2%

then you’re getting closer to MLM/network marketing territory.

Some plugins focus specifically on that model, including multi-level chains and MLM-style structures. wordpress.org

I’d only use these when the business model genuinely requires a downline. For normal referral programs, they often add unnecessary complexity.

What I’d choose for your agency

For a two-person agency, I’d avoid plugins that require you to become the affiliate-program administrator forever. A mature plugin with a clean client handoff will save you more time than chasing a cheaper option.

One question that changes the recommendation: are these affiliate programs for your agency’s own referrals, or are you installing them for clients (e.g., ecommerce/SaaS clients)?

For a two-person WordPress agency, I’d prioritize something that is:

• self-hosted (client owns the data)
• low maintenance
• easy to hand off to clients
• supports multi-tier commissions (affiliate → sub-affiliate → parent commissions)
• works without building a custom system

My shortlist:

1. Best fit: urlSliceWPturn0search2

Recommended for your situation

Why:

• Native WordPress plugin (data stays on the client site)
• Clean UI that non-technical clients can manage
• Good fit for agencies because you can install it across client sites
• Supports multi-level affiliates through its Multi-level Affiliates add-on slicewp.comslicewp.com
• Handles affiliate registration, tracking, commissions, reports, and payouts slicewp.com

The multi-tier model is fairly straightforward:

• Affiliate A refers Affiliate B
• B generates sales
• A earns a parent commission from B’s activity slicewp.com

Good agency use case:
“Client sells courses/services/products and wants ambassadors to recruit other ambassadors.”

Potential downside:

• The multi-tier functionality is a paid add-on, so budget accordingly. slicewp.comslicewp.com

2. Best if clients are WooCommerce-heavy: urlSolid Affiliateturn1search1

Strong choice if your agency mostly builds WooCommerce stores.

Pros:

• Very polished WooCommerce integration
• Affiliate portal included
• Flexible commission rules
• Payout tools included solidaffiliate.com
• Good developer/client handoff experience

Cons:

• It is more WooCommerce-centric; I’d be less inclined to use it for a membership site, lead-gen site, or custom checkout flow. solidaffiliate.com

3. More established ecosystem: AffiliateWP

A solid option if you expect complex affiliate programs.

Pros:

• Mature WordPress affiliate ecosystem
• Lots of integrations/extensions
• Good for custom setups

Cons:

• Can become an add-on-management project, which may not be ideal for a two-person agency trying to keep client maintenance simple.

My agency-oriented recommendation

For your stack, I’d standardize on:

If you only want to learn and maintain one plugin across many client sites, I’d pick SliceWP because it covers more general WordPress use cases and its multi-tier feature is directly supported. slicewp.comslicewp.com

One thing I’d confirm before selling a multi-tier program to clients: whether they mean a legitimate referral hierarchy (e.g., “partners recruit partners”) or true MLM-style compensation. The accounting, compliance, and commission rules can get much more complicated in the second case.