ChatGPT answers, unedited

If your setup is one WooCommerce store spread across multiple domains/subdomains, I’d narrow it down to AffiliateWP or SliceWP, depending on how your domains are structured.

My recommendation

1. AffiliateWP — best if you need multiple domains

• AffiliateWP tracks conversions on the site where WooCommerce is installed.
• Its External Referral Links extension lets an affiliate send traffic to a completely separate domain and preserve the affiliate ID when the visitor eventually reaches your store. wordpress.orgaffiliatewp.comaffiliatewp.com
• It also has Direct Link Tracking, which can attribute referrals based on an affiliate's approved domain rather than requiring a ?ref= link. affiliatewp.com
• For subdomains, AffiliateWP can share tracking cookies when you're using WordPress Multisite. affiliatewp.com

AffiliateWP official site

2. SliceWP — particularly good for a marketing-domain → store-domain setup

• SliceWP has an explicit Cross-site Tracking add-on designed for situations such as:

www.example.com → store.example.com

• The add-on modifies links from the marketing site to the e-commerce site so the affiliate attribution survives the transition. It's available with Pro/Pro Plus. slicewp.com
• It supports configurable first-vs-last-affiliate attribution and cookie duration. slicewp.com

SliceWP official site

Important distinction

If you mean something like:

Affiliate link → domain A → domain B → subdomain C → checkout on domain D

then I would not simply install an affiliate plugin independently on every WordPress site. For example, AffiliateWP explicitly says separate installations on a main domain and subdomain operate as separate systems unless they're configured as a WordPress Multisite network. affiliatewp.com

If you tell me your exact structure, e.g.

affiliate.example.com → www.example.com → shop.example.com

or

siteA.com → siteB.com → shop.siteC.com

and whether you're using WooCommerce + separate WordPress installations or WordPress Multisite, I can tell you exactly which plugin/add-on configuration I'd use and how I'd set up the cross-domain cookies/referral parameters.

Yes. If your store is WooCommerce and customers can move between multiple domains and/or subdomains before purchasing, there are a few options worth considering.

My top picks

1. WC Affiliate Pro — best fit for straightforward multi-domain WooCommerce

• Specifically supports cross-domain cookie sharing.
• You can connect multiple domains so a visitor who clicks an affiliate link on Domain A and purchases on Domain B can still be attributed to the affiliate.
• Also supports coupon-based tracking, shortlinks, commissions, and affiliate dashboards. WordPress.org WC Affiliate
• wcaffiliate.com
• AffiliateWP — best established/premium option

• Very mature WordPress affiliate platform with WooCommerce integration.
• It supports cross-domain promotions, but native tracking across subdomains is primarily designed around WordPress Multisite. Two independent WordPress installations on different domains don't automatically share affiliate data. AffiliateWP AffiliateWP
• AffiliateWP also has an External Referral Links extension for sending affiliate attribution from a separate domain back to the e-commerce site. WordPress.org
• affiliatewp.com
• Affiliate for WooCommerce — good if everything ultimately lives in one WooCommerce store

• Strong reporting, coupon tracking, referral links, landing-page tracking, and attribution options.
• However, I wouldn't choose it specifically for independent multi-domain cross-domain attribution without confirming your exact architecture first. Its standard model is centered around the WooCommerce store. WooCommerce WooCommerce
• woocommerce.com

What I'd choose

If your setup looks something like:

affiliate link → store1.com → store2.com → checkout on store2.com

I'd lean toward WC Affiliate Pro, because cross-domain cookie sharing is explicitly a built-in feature rather than something you have to construct around the plugin. WC Affiliate

If it looks like:

affiliate link → marketing-site.com → shop.example.com → checkout

and they're all part of a WordPress Multisite network, AffiliateWP becomes much more attractive because its multisite configuration supports cookie sharing between subdomains. AffiliateWP

One important distinction: tracking across www.example.com → shop.example.com is considerably easier than tracking across completely unrelated domains such as brandA.com → brandB.com. For the latter, you generally need explicit cross-domain attribution/token passing rather than simply sharing a browser cookie.

If you tell me your exact domain setup (e.g. example.com → shop.example.com → checkout.example.com, or siteA.com → siteB.com) and whether each domain is a separate WordPress/WooCommerce installation, I can tell you which plugin is the best fit and how I'd configure the tracking.

Yes. If your store is WooCommerce and you need one affiliate referral to survive a visitor moving between multiple domains and subdomains, there are a few good options—but they differ significantly.

My top picks

1. wcaffiliate.com — best fit for true multi-domain WooCommerce

This is the one I'd investigate first for your use case.

Its Pro version specifically supports cross-domain cookie sharing, so a customer can click an affiliate link on Domain A, move through Domain B or a subdomain, and eventually purchase on your store while retaining the affiliate attribution. WordPress.org WC Affiliate

It also supports:

• Multiple domains
• Cross-domain referral cookies
• WooCommerce orders
• Affiliate links
• Coupon-based attribution
• Multi-level commissions
• Affiliate dashboards
• Referral/visit reporting
• Shortlinks

wcaffiliate.com

Important: cross-domain cookie sharing is a Pro feature. WordPress.org

2. affiliatewp.com — best established/premium option

AffiliateWP is a more mature, widely used WordPress affiliate platform. It handles affiliate links, coupons, landing pages, and cross-domain promotions. AffiliateWP

However, there's an important catch: AffiliateWP isn't inherently a multi-domain synchronized affiliate database. By default, an installation tracks activity on the site where AffiliateWP is installed. For subdomains, its native cookie-sharing functionality is designed around a WordPress Multisite setup. AffiliateWP AffiliateWP

There is also an official External Referral Links add-on that allows affiliates to promote pages on a separate domain and pass the affiliate ID through to the WooCommerce store. WordPress.org

So I'd choose AffiliateWP if your architecture is something like:

affiliate → marketing-site.com → shop.com → checkout

rather than several completely independent WooCommerce installations that all need to share one affiliate database.

3. slicewp.com — good if you have a separate marketing WordPress site

SliceWP has a Cross-site Tracking feature specifically intended to track affiliate referrals from one WordPress site to the main eCommerce WordPress site. WordPress.org

It's worth considering if you have:

blog.example.com → www.example.com → shop.example.com

or:

brand-site.com → store.com

rather than a complicated network of unrelated domains.

One more option: Affiliate for WooCommerce

woocommerce.com is also worth looking at, particularly if you're already heavily invested in WooCommerce.

It supports referral links, coupons, custom landing pages, APIs, and direct-link tracking. WooCommerce

Its direct-link feature can attribute visitors based on their referring domain, but each subdomain needs to be registered separately. WooCommerce

What I'd choose

The key distinction is whether you have one store or multiple stores. If you tell me your exact setup—for example, domain1.com → domain2.com → shop.domain3.com, and whether those are separate WordPress/WooCommerce installations—I can recommend the plugin and the exact tracking architecture I'd use.

If you mean your own affiliate program—where affiliates send traffic to one domain/subdomain and the customer can ultimately purchase on another—I’d shortlist these:

My top pick: AffiliatePress

AffiliatePress has a dedicated Multi Domain Integration add-on designed to connect multiple domains to one centralized affiliate program. It claims to synchronize affiliate tracking, referrals, and conversions across connected domains from a single dashboard. www.affiliatepressplugin.com

That makes it particularly interesting if your setup looks like:

domain.com
shop.domain.com
domain2.com
anotherbrand.com
        ↓
   One affiliate program
        ↓
   Central dashboard

SliceWP is another strong option

SliceWP has an official Cross-site Tracking add-on. It is specifically designed for situations where your marketing WordPress site and e-commerce WordPress site are separate installations. slicewp.com

The important limitation is that the actual referral visit is registered on the e-commerce site; the marketing site essentially passes the affiliate information along to the store. It also currently relies on query-based referral URLs rather than SliceWP's friendly URLs. www.affiliatepressplugin.comslicewp.com

AffiliateWP

AffiliateWP is excellent if you're primarily running one WooCommerce/EDD store. However, its documentation says that separate installations on different domains operate as separate affiliate systems unless you're using WordPress Multisite. affiliatewp.com

It does support cookie sharing between subdomains when using a WordPress Multisite installation. affiliatewp.com

One important distinction

If by "multiple domains and subdomains" you mean something like:

Affiliate link → domain-A.com → sub.domain-B.com → domain-C.com → checkout on store.domain-D.com

that's substantially harder than simply having multiple domains point to the same WooCommerce installation. You need cross-domain attribution/session handoff, not merely a shared cookie.

If you tell me your exact setup (e.g. domain.com + shop.domain.com + 2 other domains, WooCommerce, separate WordPress installs or one install), I can tell you which plugin is the best fit and how I'd configure the tracking.

Yes. If your store is WooCommerce and you need affiliates to send traffic across multiple domains and subdomains, I’d shortlist these:

My pick: AffiliateWP

AffiliateWP is probably the strongest choice if you have a setup like:

• store.com → checkout/store
• blog.com → content/marketing site
• promo.com → landing pages
• offers.store.com → promotional subdomain

AffiliateWP supports cross-domain promotions and direct-link tracking, and it integrates directly with WooCommerce. affiliatewp.com

There is an important distinction, though: AffiliateWP by itself normally tracks on the site where it's installed. For completely separate domains, you need its external/cross-domain functionality. For WordPress Multisite, AffiliateWP can share tracking across subsites when configured appropriately. affiliatewp.com

AffiliateWP official site

If you want the easiest WooCommerce option

Affiliate for WooCommerce is worth considering. Its Direct Link Tracking can attribute a purchase to an affiliate based on the referring domain, without requiring a ?ref=123 affiliate URL. You can assign multiple domains to one affiliate. However, each subdomain has to be registered separately. woocommerce.com

Affiliate for WooCommerce

One I'd consider if you have several WordPress sites

SliceWP has a Cross-site Tracking feature specifically intended to track referrals from another WordPress site to the main eCommerce WordPress site. wordpress.org

SliceWP

The key question

If you tell me how your domains are structured, e.g.

affiliate-site.com → landing-site.com → store.com → checkout.store.com

and whether they're separate WordPress installations or one WordPress Multisite, I can tell you which plugin/setup will actually preserve the affiliate referral through the entire journey.

Yes. If by “across multiple domains and subdomains” you mean something like:

• example.com → marketing site
• shop.example.com → WooCommerce store
• example-store.com → another storefront
• You want one affiliate program, with the same affiliate ID/referral surviving the journey and crediting the eventual purchase

then I’d shortlist these:

1. SliceWP — best fit for WordPress/WooCommerce

SliceWP has a Cross-site Tracking add-on specifically designed to connect separate WordPress sites—for example, a marketing site and a WooCommerce store. It passes the affiliate referral information when the visitor moves to the e-commerce site. slicewp.com

Pros

• Built specifically for WordPress/WooCommerce
• Affiliate dashboard and commission management included
• Cross-site tracking add-on
• Good choice if you have separate WordPress installations
• No percentage taken from commissions slicewp.comwww.affiliatepressplugin.comaffiliatewp.com

Important limitation: its documented cross-site tracking is designed around a marketing site → eCommerce site setup, and the cross-site mechanism uses query-based referral links. slicewp.com

2. WC Affiliate — worth considering if you need true multi-domain tracking

WC Affiliate on WordPress.org explicitly advertises Cross-Domain Cookie Sharing in its Pro version. It says a visitor can click an affiliate link on Site A and purchase on Site B, with the commission credited to the affiliate. wordpress.org

This is particularly interesting if your requirement is genuinely domain A → domain B, rather than simply multiple subdomains of one WordPress installation.

3. AffiliatePress — strongest option for several independent domains

AffiliatePress has a Multi Domain Integration feature that connects multiple sites to a centralized AffiliatePress installation. Its connector can read the affiliate parameter on the child site and send visit data back to the parent site. www.affiliatepressplugin.com

This is the one I'd investigate if you have several completely separate WordPress/WooCommerce stores and want one central affiliate database.

What about AffiliateWP?

AffiliateWP is excellent generally, but I'd be more cautious for your particular requirement. Its normal tracking is site-specific; subdomain sharing is supported in certain WordPress Multisite configurations, while separate installations require additional configuration/add-ons. affiliatewp.com

My recommendation

One important distinction: if you mean multiple domains/subdomains that the customer moves between before purchasing, rather than simply allowing affiliates to link to different domains, tell me your exact domain structure (e.g. www.example.com → shop.example.com → checkout.example2.com). I can tell you which plugin will actually preserve the referral through that entire journey and how I'd configure it.

If you mean one affiliate program where a referral can start on one domain/subdomain and the customer can eventually purchase on another domain/subdomain, the best WordPress options are:

🥇 SliceWP — probably the best fit

SliceWP has a Cross-site Tracking add-on specifically designed for situations where your marketing site and eCommerce site are separate WordPress installations. It passes the affiliate referral through to the store so the eventual purchase can be credited. slicewp.com

The important caveat: its cross-site feature is designed around a marketing site → one eCommerce site, rather than an arbitrary number of independent domains. slicewp.com

🥈 AffiliateWP — strongest if you're using WordPress Multisite

AffiliateWP can share tracking across subdomains when you're using WordPress Multisite. Its documentation specifically describes sharing cookies across subdomains in a multisite network. affiliatewp.com

However, if you install AffiliateWP independently on domainA.com and domainB.com, they are separate affiliate systems and do not automatically share affiliates/referrals. affiliatewp.com

There are also third-party cross-domain extensions for AffiliateWP, but I'd be more cautious about relying on those for a mission-critical store. wordpress.org

🥉 WC Affiliate — worth considering for multiple WooCommerce domains

WC Affiliate on WordPress.org advertises Cross-Domain Cookie Sharing, specifically allowing a referral originating on one connected site to receive credit when the customer purchases on another domain. wordpress.org

It's particularly interesting if you have multiple separate WooCommerce stores/domains, rather than merely subdomains.

What I'd choose

One important distinction: "multiple domains and subdomains" can mean two very different architectures. If you give me something like:

domain1.com → shop.domain1.com → domain2.com → shop.domain2.com

and tell me whether these are one WordPress installation, WordPress Multisite, or completely separate WordPress/WooCommerce sites, I can tell you which plugin will actually preserve the referral through that entire journey.

Yes. If your store needs one affiliate program to track referrals across multiple domains and subdomains, I’d narrow it down to these:

🥇 My pick: AffiliatePress

AffiliatePress Multi-Domain

AffiliatePress has a dedicated Multi Domain Integration that is specifically designed to connect multiple domains to one centralized AffiliatePress installation. Its connector can be installed on the additional WordPress sites, with affiliate visits and activity sent back to the parent site through an API. www.affiliatepressplugin.com

For example, you could have:

• store.com
• shop.store.com
• brand2.com
• brand3.com

…and manage the affiliate program centrally rather than running four completely separate affiliate databases.

🥈 SliceWP

SliceWP

SliceWP has a Cross-site Tracking feature that can track affiliate referrals from one WordPress site to the main eCommerce WordPress site. www.affiliatepressplugin.comwordpress.org

However, I'd be more cautious with it for your use case. SliceWP has stated that it isn't currently compatible with WordPress Multisite, and its cross-site setup has specific requirements. wordpress.org

AffiliateWP

AffiliateWP

AffiliateWP is excellent if everything is essentially one WordPress/WooCommerce installation. It supports cookie sharing between subdomains when used with WordPress Multisite. affiliatewp.com

But AffiliateWP's own documentation says that separate installations on domain.com and subdomain.domain.com operate as separate affiliate systems unless you're using a Multisite configuration. affiliatewp.com

So I wouldn't choose it as the first option for genuinely independent domains.

Another interesting option: WC Affiliate

WC Affiliate on WordPress.org

Its Pro version specifically advertises Cross-Domain Cookie Sharing, allowing a visitor who clicks an affiliate link on Site A and purchases on Site B to receive the correct affiliate attribution. wordpress.org

If your setup is something like domain1.com → domain2.com → checkout on domain3.com, I'd choose AffiliatePress over AffiliateWP or SliceWP.

If you tell me how your domains are structured (e.g. www.example.com, shop.example.com, otherbrand.com) and whether they're separate WordPress/WooCommerce installations, I can tell you exactly which plugin/setup will work best and what the tracking flow should look like.

Yes. If you mean one affiliate program that can attribute a referral when the customer moves between multiple domains/subdomains before purchasing, I’d narrow it down to these:

My pick: WC Affiliate Pro

WC Affiliate specifically advertises Cross-Domain Cookie Sharing, allowing a visitor who clicks an affiliate link on Domain A and purchases on Domain B to be credited to the affiliate. Its Pro version also supports multiple domains under one affiliate program. wordpress.org

That's probably the closest match if your setup is something like:

• brand.com
• shop.brand.com
• brandstore.com
• anotherbrand.com

…and you want one affiliate → one customer journey → one commission, regardless of which connected domain ultimately processes the order.

If you're already using AffiliateWP

AffiliateWP is very capable with WooCommerce, but there's an important distinction: its normal installation tracks activity on the site where AffiliateWP is installed. Multiple domains don't automatically become one shared affiliate database. affiliatewp.com

For subdomains, AffiliateWP can share cookies when you're using a WordPress Multisite network. affiliatewp.com For genuinely separate domains, you'd generally need its external/cross-domain approach or additional configuration.

SliceWP is another good option

SliceWP has a Cross-site Tracking premium add-on specifically designed to track affiliate referrals from one WordPress site to a main eCommerce WordPress site. wordpress.org

The catch is that SliceWP isn't ideal if you're trying to make several independent WordPress installations behave like one unified affiliate database; its own support documentation indicates that Multisite installations can result in separate datasets. wordpress.org

So if you tell me your exact setup — e.g. domain1.com → domain2.com → checkout on domain3.com, whether they're separate WordPress installs, WooCommerce, and whether the domains are owned by you or are affiliate/partner sites — I can tell you which plugin will actually preserve the referral across that entire journey, rather than just recommending a generic affiliate plugin.

Yes. If your store needs affiliate referral tracking across multiple domains and subdomains, I’d shortlist these:

My recommendation

If all of your domains are WooCommerce stores: I'd look at WC Affiliate Pro first. Its Cross-Domain Cookie Sharing feature is specifically designed so a visitor can click an affiliate link on one domain and purchase on another, with the commission attributed to the affiliate. wordpress.org

If you have several completely separate WordPress installations/domains: AffiliatePress looks more appropriate. Its Multi Domain addon uses a central/parent AffiliatePress installation with connectors on the other sites, allowing visits, clicks, and affiliate activity to be centralized. www.affiliatepressplugin.com

If the setup is something like:

affiliate.com → www.yourstore.com → shop.yourstore.com

then SliceWP + its Cross-site Tracking add-on is worth considering. It specifically bridges a marketing WordPress site and a separate eCommerce WordPress site. www.affiliatepressplugin.comslicewp.com

One important distinction: "multiple domains" and "subdomains" aren't technically the same tracking problem. A normal cookie can cover subdomains under the same parent domain, but it cannot simply be shared between unrelated domains such as store.com and store2.com. For unrelated domains, you want a plugin that explicitly supports cross-domain referral/session handoff, rather than merely enabling a shared cookie.

If you tell me your exact setup (e.g. domain.com, shop.domain.com, domain2.com + WooCommerce/WordPress on each), I can tell you which plugin is the best fit and how I'd configure the tracking.

If your store is WordPress/WooCommerce and you need affiliate referrals to survive across multiple domains and subdomains, I’d shortlist these:

1. SliceWP — best fit for true cross-domain tracking

SliceWP has a dedicated Cross-site Tracking add-on specifically designed for situations where, for example:

• example.com = marketing site
• shop.example.com = store
• anotherdomain.com = another site in your funnel

The add-on bridges a separate WordPress marketing site to the WordPress eCommerce site and preserves the affiliate referral when the visitor eventually reaches the store. slicewp.com

Important limitation: its cross-site tracking currently uses query-based referral links; its documentation says Friendly Affiliate URLs won't work for this particular setup. slicewp.com

2. AffiliateWP — excellent, but less straightforward

AffiliateWP is very capable, but its normal tracking is tied to the WordPress site where it's installed. Installing it separately on example.com and shop.example.com creates separate affiliate systems. affiliatewp.com

It can share affiliate tracking across subdomains when you're using WordPress Multisite, with cookie sharing enabled. affiliatewp.com

So I'd choose AffiliateWP if your domains/subdomains are part of a single WordPress Multisite network.

3. Affiliate for WooCommerce

This is worth considering if you're heavily invested in WooCommerce. It supports direct-link/referrer tracking across domains, but each subdomain has to be registered separately. woocommerce.com

My recommendation

If you tell me your exact setup — e.g. domain1.com, domain2.com, shop.domain1.com, whether they're separate WordPress installs, WooCommerce, and where checkout occurs — I can tell you exactly which plugin will preserve the affiliate cookie/referral across all of them and how I'd configure it.

If you need to track affiliate referrals across multiple WordPress domains and subdomains (for example store.com, shop.store.com, and brand2.com), you’ll want a plugin that supports cross-domain cookie tracking, not just normal affiliate links.

Here are the strongest options:

My recommendation by setup

1. One WooCommerce store + several domains/subdomains

• Pick WC Affiliate Pro if everything is WooCommerce and you want the simplest WordPress-native setup. It specifically supports cross-domain cookie sharing. wordpress.org

2. Multiple separate WordPress installs

• Pick AffiliatePress Multi Domain or a SaaS tracker like FirstPromoter. These are better when each domain is its own WordPress site. wordpress.orgwww.affiliatepressplugin.com

3. Large affiliate program with many partners

• Pick AffiliateWP if you value ecosystem maturity, integrations, and reporting, but plan the multi-domain architecture carefully because separate installations do not automatically share referral data. affiliatewp.com

Before choosing, check these requirements:

• ✅ Cross-domain cookie persistence (not only subdomains)
• ✅ Server-side conversion tracking (helps with browser privacy changes)
• ✅ WooCommerce order attribution
• ✅ Coupon-based affiliate tracking
• ✅ Recurring commissions if you sell subscriptions
• ✅ Ability to exclude self-referrals/fraud

If you tell me:

1. whether you use WooCommerce, Shopify, Easy Digital Downloads, or something else,
2. how many domains/subdomains you have, and
3. whether they are separate WordPress installs or one install,

I can narrow it down to the best fit.

If your goal is one affiliate program that can track referrals when users move between multiple domains and subdomains, I’d shortlist these two:

🥇 AffiliateWP — best overall for a multi-domain setup

AffiliateWP is probably the strongest choice if this is a serious WooCommerce store.

• Supports cross-domain promotions and referral tracking. affiliatewp.com
• Its Direct Link Tracking supports multiple approved domains, including subdomains. affiliatewp.com
• Can track the affiliate through the referral journey and ultimately attribute the purchase.
• Works with WooCommerce and keeps the affiliate system inside WordPress.
• Important: if you install separate AffiliateWP instances on different domains, they do not automatically share affiliate/referral data. affiliatewp.com

I'd choose this if you have something like:

brand.com → shop.brand.com → checkout.brand.com

or

brand.com → brandstore.com → purchase

and you want the same affiliate attribution throughout.

🥈 SliceWP — excellent if you have a marketing site + store

SliceWP has a dedicated Cross-site Tracking add-on specifically for sending referred visitors from one WordPress site/domain to another ecommerce WordPress site. slicewp.com

For example:

blogsite.com/?aff=123
↓
store.com/product
↓
purchase attributed to affiliate #123

The add-on acts as a bridge between the marketing site and ecommerce site. Note that SliceWP's cross-site tracking currently relies on query-based referral links, rather than its friendly affiliate URL format. slicewp.com

My recommendation

One important distinction: if by "multiple domains" you mean several completely separate WordPress/WooCommerce stores that all need to report into one central affiliate database, that's a different requirement. In that case, I would not simply install the plugin independently on each site.

If you tell me your exact setup (e.g. domain1.com, shop.domain1.com, domain2.com, and where checkout happens), I can tell you which plugin/configuration will actually preserve the affiliate cookie/referral across all of them.

If your WordPress store needs affiliate referral tracking across multiple domains and subdomains, the best plugin depends on how your sites are structured:

My recommendation by setup

1. One store, multiple subdomains
Example:

• www.example.com
• shop.example.com
• members.example.com

Use AffiliateWP with a WordPress Multisite setup if possible. It supports cookie sharing across subdomains in multisite configurations. affiliatewp.com

2. Separate WordPress installs on different domains
Example:

• brand1.com
• brand2.com
• brand3.com

Look at WC Affiliate Pro or a SaaS affiliate platform. WC Affiliate specifically advertises cross-domain cookie sharing so referrals can persist when customers move between connected domains. wordpress.org

3. Affiliates promote from their own websites
Example:

• influencer blogs
• partner sites
• review sites

AffiliateWP’s Direct Link Tracking can attribute referrals from approved affiliate domains without requiring a traditional affiliate URL click. affiliatewp.comaffiliatewp.com

Before choosing, I’d confirm these details:

1. Are all domains selling from one WooCommerce store, or do you have multiple stores?
2. Are the domains separate (store1.com, store2.com) or subdomains (a.example.com, b.example.com)?
3. Do you need affiliates to have one shared dashboard across all sites?

Those answers change the best choice quite a bit.

If your store needs to track affiliate referrals across multiple domains and subdomains (for example store.com, checkout.store.com, brand2.com, or regional domains), you’ll want more than a basic affiliate plugin. The key features to look for are:

• cross-domain cookie/referral tracking
• shared affiliate IDs across sites
• WooCommerce compatibility (if applicable)
• first/last-click attribution options
• server-side tracking (helpful as browsers restrict cookies)

Good WordPress options:

1. AffiliateWP — Best for established stores

Best fit: WooCommerce stores that want a mature affiliate management system.

Pros:

• Strong affiliate dashboard and payout tools
• Supports external referral links and cross-domain promotions with add-ons/workflows affiliatewp.com
• Good WooCommerce/Easy Digital Downloads ecosystem

Caution:

• A normal AffiliateWP install does not automatically sync multiple separate WordPress installs/domains; subdomains or multiple sites may require specific setup/add-ons. affiliatewp.com

2. WC Affiliate — Best if you run WooCommerce only

Best fit: A WooCommerce store where all sales happen inside your WordPress ecosystem.

Pros:

• Built specifically for WooCommerce
• Includes referral tracking, commissions, affiliate dashboards
• Pro version adds cross-domain cookie sharing for connected domains wordpress.org

3. WooCommerce Affiliate for WooCommerce — Best if you want WooCommerce-native

Best fit: Stores already deep into WooCommerce.

Pros:

• Integrates directly with WooCommerce
• Supports direct-link/domain-based tracking
• Can track referring domains and subdomains when configured woocommerce.com

4. Affiliate SaaS + WordPress integration (best for many domains)

If you have multiple independent stores, such as:

• brandA.com
• brandB.com
• brandC.com
• separate checkout systems

a SaaS affiliate platform is often better than trying to force WordPress plugins to share cookies.

Examples:

• Rewardful
• FirstPromoter
• Tapfiliate

These are designed around centralized tracking across multiple properties.

My recommendation by setup

A few details would change the recommendation:

1. Are all domains running WordPress + WooCommerce, or are some separate platforms?
2. Do customers move between domains before checkout, or does each domain complete its own checkout?
3. Do you need one shared affiliate dashboard across all domains?

If you mean one affiliate program that can credit a referral when the customer moves between multiple domains/subdomains before purchasing, there are a few options, but I’d put AffiliateWP at the top of the list.

Best options

1. AffiliateWP — my first choice.
AffiliateWP supports referral links, coupon tracking, custom landing pages, direct-link tracking, and cross-domain promotions. affiliatewp.com

However, there's an important distinction: a normal AffiliateWP installation is tied to the WordPress site where the purchase occurs. Two separate WordPress installations on different domains don't automatically share affiliate data. affiliatewp.com AffiliateWP does have a Cross Domain Tracker add-on specifically designed to let affiliates promote WordPress-based marketing sites while tracking the eventual conversion on the main AffiliateWP site. affiliatewp.com

2. WC Affiliate Pro is particularly interesting if your requirement is literally "click on Domain A → visit Domain B → purchase on Domain B." Its documentation explicitly says its Pro version provides Cross-Domain Cookie Sharing, allowing referral cookies to persist across connected domains. wordpress.org

The important question

There's a big difference between:

A.
blog.yoursite.com → shop.yoursite.com → checkout

and

B.
siteA.com → siteB.com → siteC.com → checkout

Subdomains are relatively straightforward because they can share cookies when configured correctly. AffiliateWP even has a cookie-sharing setting for subdomains in a WordPress multisite setup. affiliatewp.com

Completely separate domains require a cross-domain handoff/tracking mechanism, not simply installing the same affiliate plugin on each site.

If you tell me your exact setup — e.g. domain1.com → domain2.com → shop.domain3.com, whether they're separate WordPress installs, and whether you're using WooCommerce — I can recommend the exact plugin/setup and explain how I'd configure the tracking.

If you mean one affiliate program that can credit sales when visitors move between multiple domains and subdomains, the best choice depends on how your store is structured. Many WordPress affiliate plugins track well inside one WordPress install, but true cross-domain tracking is a more specialized requirement.

Here are the strongest options:

For your case, I would choose like this:

• One WordPress multisite + one WooCommerce store: start with AffiliateWP. It is designed around WordPress/WooCommerce and can handle subdomain scenarios with the right configuration. affiliatewp.com
• Several independent WordPress sites/domains that all pay affiliates from one pool: look beyond a normal WP plugin and consider a centralized affiliate tracking platform, or a plugin specifically supporting cross-site tracking.
• A main store plus marketing subdomains (for example shop.com, blog.shop.com, offers.shop.com): AffiliateWP is worth testing first because this is closer to its intended use case. affiliatewp.com

Before picking one, check these details:

1. Are the domains all on the same WordPress installation or separate installs?
2. Is checkout always on one domain?
3. Are you using WooCommerce?
4. Do you need affiliates to get credit for sales across different brands/stores, or only subdomains?

If you tell me your setup (example: store.com + shop2.com + blog.store.com, WooCommerce or not), I can narrow it down to the plugin/configuration that will actually work.

If you want to track affiliate referrals across multiple domains and subdomains, you need a plugin (or plugin + tracking method) that supports first-party cookies, cross-domain tracking, or server-side attribution. Not every WordPress affiliate plugin does this well.

Here are the strongest options:

If all your sites are subdomains

Example:

• shop.example.com
• blog.example.com
• members.example.com

Most major affiliate plugins can share referral cookies by setting the cookie domain to:

.example.com

This allows the referral cookie to work across every subdomain.

If you have completely different domains

Example:

• example.com
• mybrandstore.com
• checkoutsite.com

Regular browser cookies cannot be shared between different root domains.

You need one of these approaches:

• Cross-domain JavaScript tracking
• Click IDs passed in URLs
• Server-side attribution
• First-party tracking scripts
• SaaS affiliate tracking platform

This is where Tapfiliate and Post Affiliate Pro are significantly stronger than most WordPress-only plugins.

If you're using WooCommerce

For WooCommerce stores, I'd generally recommend:

1. AffiliateWP if everything stays within your WordPress ecosystem.
2. Tapfiliate if customers move between multiple domains.
3. Post Affiliate Pro if you need enterprise-level attribution, coupon tracking, and multi-site support.

If you also use Stripe or external checkout

If your checkout occurs on another domain (or a hosted checkout page), make sure the affiliate solution explicitly supports:

• Cross-domain referral tracking
• Checkout attribution
• Coupon-to-affiliate attribution
• Server-to-server conversion tracking
• Long-lived first-party cookies

Those features help preserve attribution even when customers navigate between different domains or external payment flows.

If you can describe your setup—for example:

• your main domain(s),
• whether you're using WooCommerce,
• whether checkout happens on the same domain or a different one,
• and whether the sites are subdomains or completely separate domains—

I can narrow it down to the plugin that best fits your architecture.

If your goal is tracking affiliate referrals when customers move between multiple domains or subdomains before purchasing, these are the strongest WordPress options:

My recommendations

For most WooCommerce stores

• SliceWP + Cross Site Tracking
• Excellent if your flow looks like:
  • landing.example.com
  • shop.example.com
  • checkout.example.net
• Preserves attribution across domains even when browser cookie restrictions would normally break tracking. pluginsforwp.com

For a pure WooCommerce affiliate program

• WC Affiliate Pro
• Supports:
  • Cross-domain cookie sharing
  • Multiple connected domains
  • Coupon attribution
  • Affiliate dashboards
  • Automatic payouts (Pro) wordpress.org

If you're already using AffiliateWP

• Stay with it, but add a cross-domain solution.
• By itself, AffiliateWP treats installations on different domains as separate affiliate systems and won't synchronize referral tracking automatically. affiliatewp.com

If your setup is something like:

example.com
blog.example.com
shop.example.com
checkout.example.com
store2.com

I'd rank them:

1. SliceWP + Cross Site Tracking ⭐⭐⭐⭐⭐
2. WC Affiliate Pro ⭐⭐⭐⭐☆
3. AffiliatePress Enterprise ⭐⭐⭐⭐☆
4. AffiliateWP + Cross Domain add-on ⭐⭐⭐☆☆

A few technical considerations

Modern browsers (especially Safari and Firefox) increasingly restrict third-party cookies. Plugins that use server-side or token-based referral handoff (rather than only cookies) generally provide more reliable cross-domain attribution. That's one reason SliceWP's approach stands out for complex multi-domain sales funnels. pluginsforwp.com

If you can share:

• whether you're using WooCommerce,
• whether the sites are subdomains (e.g. shop.example.com) or different domains (e.g. example.com → checkout.com),
• and whether you have one WordPress installation, a multisite network, or separate installs,

I can narrow it down to the best option for your exact architecture.

If you need to track affiliate referrals across multiple domains and subdomains, you need a plugin that can preserve attribution as users move between sites. Not every WordPress affiliate plugin supports this well.

Here are the strongest options:

Best WordPress-native option: AffiliateWP

If your store runs on WordPress/WooCommerce, AffiliateWP is usually the first plugin to consider.

Pros:

• Native WordPress plugin
• WooCommerce integration
• Can track referrals across subdomains
• Works with custom affiliate links
• Supports coupons as affiliate attribution
• Extensive developer hooks

For multiple separate domains, you'll typically need:

• consistent first-party tracking
• custom cross-domain cookie handling or JavaScript
• sometimes their Portal or Direct Link Tracking features depending on your setup

This works well if all domains are under your control.

Best overall for multiple domains: Post Affiliate Pro

Post Affiliate Pro is designed specifically for businesses operating several websites.

It supports:

• unlimited domains
• subdomains
• cross-domain cookies
• first-party tracking
• cookieless tracking options
• coupon tracking
• server-to-server postbacks
• WordPress/WooCommerce plugins

If affiliates send traffic like:

• affiliate.com → store1.com
• store1.com → checkout.store2.com
• store2.com → members.store3.com

the referral stays intact.

Best cloud option: Tapfiliate

Tapfiliate is another excellent choice.

It provides:

• JavaScript cross-domain tracking
• first-party cookies
• WooCommerce integration
• Shopify integration
• Stripe integration
• API

Many SaaS companies use it because users frequently move across marketing sites, app domains, and checkout domains.

If your setup is WooCommerce + WordPress only

A common setup is:

• www.example.com
• shop.example.com
• checkout.example.com
• members.example.com

AffiliateWP generally handles this well with proper cookie configuration.

If your setup is instead:

• brand1.com
• brand2.com
• brand3.com

then Post Affiliate Pro or Tapfiliate are usually better choices because they're designed for true cross-domain attribution.

Questions to narrow it down

The best recommendation depends on your architecture:

1. Are the sites on subdomains (e.g. shop.example.com) or completely different domains (e.g. example.com and example-store.com)?
2. Is your checkout on the same domain as your storefront, or does it redirect elsewhere?
3. Are you using WooCommerce, Easy Digital Downloads, or another ecommerce platform?

Those details determine whether a WordPress plugin alone is sufficient or whether you'll benefit from a dedicated cross-domain tracking platform.

If you need to track affiliate referrals across multiple domains and subdomains, the key feature to look for is cross-domain tracking (or first-party tracking with cross-domain support). Not every WordPress affiliate plugin supports this well.

Here are the strongest options:

If all your sites are WordPress/WooCommerce

I would generally recommend AffiliateWP because it offers:

• Affiliate tracking across multiple WordPress installs
• WooCommerce integration
• Custom referral links
• Coupon attribution
• REST API
• Fraud detection
• Lifetime commissions (with add-ons)
• Easy migration from other affiliate plugins

It works especially well if:

• store.com
• shop.store.com
• courses.store.com

all belong to the same business.

If your customer journey spans different platforms

For example:

• blog.com (WordPress)
• shop.com (WooCommerce)
• checkout.otherdomain.com
• app.store.com

then a dedicated affiliate platform like Tapfiliate or Post Affiliate Pro is typically a better fit because they're designed for cross-domain attribution and don't depend on a single WordPress installation.

Cross-domain tracking considerations

Regardless of the plugin you choose, you'll usually need to:

• Enable first-party cookies where possible.
• Configure cross-domain tracking so referral IDs persist when users move between domains.
• Ensure the checkout domain receives the affiliate identifier (often via URL parameters or JavaScript).
• Account for modern browser privacy features that can shorten cookie lifetimes or restrict third-party cookies.

My recommendation by scenario

• One WooCommerce store with a few subdomains: AffiliateWP
• Several WordPress stores on different domains: AffiliateWP (if you want everything inside WordPress)
• WordPress + Shopify + custom app + multiple domains: Tapfiliate
• Large business with complex attribution: Post Affiliate Pro

If you can share:

• how many domains and subdomains you have,
• whether they're all WordPress/WooCommerce,
• and whether checkout happens on the same domain or a different one,

I can narrow it down to the plugin that's most likely to work without custom development.