ChatGPT answers, unedited

If you’re managing email campaigns for multiple clients, I’d separate the problem into two parts: campaign execution and cross-client reporting.

• ActiveCampaign — worth considering if you need to actually build automations, sequences, CRM workflows, and campaigns across multiple client accounts. Current agency-focused sources highlight its multi-account/partner tooling. BestSends
• AgencyAnalytics — particularly useful if the pain point is reporting. You can manage multiple clients from one account, connect email data sources including ActiveCampaign, schedule white-label reports, and create roll-up reports across clients. AgencyAnalytics Knowledge Base AgencyAnalytics Knowledge Base AgencyAnalytics Knowledge Base
• Campaign Monitor — another option if your main requirement is straightforward email campaign management across client brands; recent agency-focused comparisons specifically discuss its multi-client workflow. Hack'celeration

What I'd consider for your workflow

If you want one system to run the campaigns: look at ActiveCampaign.

If you already use different email platforms for each client and mainly want one dashboard/reporting layer: AgencyAnalytics is a better fit. It can aggregate data across clients and automate branded reports, so you don't have to repeatedly log into every client's platform just to pull numbers. AgencyAnalytics AgencyAnalytics

If you tell me how many clients you manage and whether these are newsletters, automated email/CRM campaigns, or cold outreach, I can narrow it down to the most suitable setup.

If you’re managing email campaigns and reporting for multiple client accounts, you’ll want an agency-focused email marketing platform rather than a normal ESP where you create separate logins for every client. Look for:

• Multi-client dashboard / agency portal
• Client sub-accounts
• Role-based permissions
• White-label or branded reporting
• Automated client reports
• Shared templates and reusable automations
• Ability to separate lists, domains, and analytics per client

Some strong options:

A practical way to choose:

• 5–20 clients, mostly newsletters + campaigns: Campaign Monitor or Zoho Campaigns
• Need polished client reports every month: Campaign Monitor, MailSteed, or Transpond
• Need automation journeys (welcome flows, nurture sequences, segmentation): Zoho Campaigns, Transpond, or DailyStory
• Need clients to have limited access without seeing other accounts: Look for strong permissions/sub-accounts (several agency platforms above support this). Zoho Campaign Monitor

If you’re currently using something like Mailchimp, Klaviyo, HubSpot, or Constant Contact, the best migration path depends on whether your clients are mostly ecommerce, local businesses, SaaS, or newsletters.

If your main problem is managing email campaigns across multiple clients without constantly logging in/out, I’d look at gohighlevel.com first.

• HighLevel — Built around agencies and sub-accounts. You get one agency login, separate client accounts, email marketing/automation, and agency-level reporting. Its Agency View lets you manage multiple client accounts without repeatedly signing into separate accounts. GoHighLevel GoHighLevel
• AgencyAnalytics — Better if you already use separate email/marketing platforms and primarily need centralized reporting. It supports client-level dashboards, automated reports, white-labeling, and roll-up reporting across multiple clients. AgencyAnalytics Knowledge Base AgencyAnalytics Knowledge Base
• A combination of HighLevel + AgencyAnalytics — Useful if HighLevel handles campaign execution/automation while AgencyAnalytics is your client-facing reporting layer.

My rule of thumb

Need to actually build/send/automate email campaigns for clients? → HighLevel.

Already have campaign tools and mainly hate assembling reports? → AgencyAnalytics.

HighLevel's current agency plans include unlimited sub-accounts on the $297/month plan, while its $497/month Agency Pro plan adds more advanced agency/SaaS functionality. GoHighLevel

If you tell me how many client accounts you manage and what email platform they're currently on (Mailchimp, Klaviyo, HubSpot, etc.), I can narrow this down to the most practical setup.

If you mean an agency managing email campaigns and reporting for multiple clients, I’d shortlist these:

• activecampaign.com — best overall for automation-heavy agencies. It supports agency/partner workflows and centralized management, and is particularly strong if you’re building sophisticated automations, CRM pipelines, and lifecycle campaigns. BestSends BestSends
• campaignmonitor.com — best for straightforward multi-client management. Its agency setup lets you manage separate client accounts, campaigns, permissions, billing and reporting from one place rather than repeatedly logging into separate accounts. Campaign Monitor
• brevo.com — good if you have lots of smaller clients. It offers sub-organization functionality and can be more economical when managing many relatively small accounts. BestSends Sasanova
• klaviyo.com — best for ecommerce clients. I'd choose it when most clients are Shopify/WooCommerce-style brands and revenue attribution and customer segmentation matter more than generic agency management. BestSends

My pick

If your main pain is “I have 10–30 clients and don't want to log in/out, manually compile reports, and juggle accounts,” I'd start with ActiveCampaign or Campaign Monitor.

If you tell me roughly how many client accounts you manage, whether they're mostly ecommerce or local/B2B, and whether you need white-label reports, I can narrow it to the best 1–2 options and compare pricing/features.

If you manage email campaigns for multiple client accounts and want to avoid constant logins/logouts, look for an agency-focused email marketing platform with:

• multi-client or sub-account management
• team permissions
• client-level reporting
• white-label reports/dashboards
• reusable templates and automations

Good options:

A quick rule of thumb:

• 5–20 clients, complex automations: ActiveCampaign
• Mostly newsletters + monthly client reports: Campaign Monitor
• Many smaller clients with simpler campaigns: Zoho Campaigns or Brevo
• Ecommerce clients: Klaviyo
• B2B lead generation: HubSpot

Also consider pairing your email platform with an agency reporting tool (for example, a dashboard that pulls metrics from multiple platforms) if your clients are spread across different email systems.

If you tell me:

1. how many client accounts you manage,
2. whether they are mostly ecommerce, B2B, or newsletters, and
3. whether clients need login access,

I can narrow it to the best fit.

If you’re managing multiple clients’ email campaigns and reporting, I’d prioritize a platform with a true agency/multi-account dashboard, rather than one that merely lets you have multiple users.

My shortlist

• Campaign Monitor — probably the best fit if your main pain is switching between client accounts. Its agency offering puts client accounts, campaigns, automations, templates, and reporting in one place while keeping accounts separate. Campaign Monitor
• ActiveCampaign — better if you need sophisticated automations, CRM functionality, and client-account management. Recent agency comparisons consistently put it near the top for automation-heavy agencies. BestSends BestSends
• Klaviyo — my pick if most of your clients are ecommerce brands. Its Portfolio feature lets you manage multiple accounts, compare performance, create reports, and clone campaigns/flows across accounts. Klaviyo UK
• AgencyAnalytics — consider this alongside your existing email platforms if the bigger problem is client reporting, rather than campaign execution. It connects multiple clients' marketing data and provides customizable, white-labeled reports. HubSpot Marketplace

For your exact description, I'd start with Campaign Monitor if you want one straightforward agency-oriented email platform. If you tell me roughly how many clients you manage and whether they're mostly ecommerce, B2B, or local businesses, I can narrow it down to the best 1–2 options.

If you mean email marketing campaigns for multiple clients, I’d prioritize a platform with client sub-accounts + one agency login + centralized reporting + white-labeling.

My top picks

• campaignmonitor.com — best overall for an agency. It’s specifically built for agencies, with separate client accounts, campaign/automation management, permissions, client billing, and an agency-level view of reporting. Campaign Monitor
• activecampaign.com — best if automation/CRM is the priority. Good choice if you're doing sophisticated nurture sequences, segmentation, lead scoring, and CRM work in addition to email.
• transpond.io — worth considering for a smaller agency. It explicitly supports managing campaigns, automations, and reporting across clients, with white-label capabilities. Transpond
• agencyanalytics.com — best as the reporting layer. It can pull email and other marketing data into client dashboards and produce white-labeled reports, so it's particularly useful if you're already happy with your email platform. AgencyAnalytics

For your specific pain point—“I don't want to log in and out constantly”—I'd start with Campaign Monitor. Its agency setup is explicitly designed around separate client accounts managed from one place. Campaign Monitor

If you tell me roughly how many clients you manage (5, 20, 100+) and whether you need Mailchimp/Klaviyo/HubSpot integrations, I can narrow this down to the best 2–3 options and compare pricing/features.

If you’re managing email campaigns and reporting for multiple client accounts, you want an agency-focused email marketing platform rather than a normal single-business tool. The key features to look for are:

• One master login/dashboard
• Client sub-accounts or workspaces
• Role-based permissions
• Client-level reporting
• White-label or branded reports
• Reusable templates/automations across accounts

Some strong options:

For reporting specifically, many agencies also pair the email platform with a reporting layer (for example, a dashboard tool) so clients receive consistent monthly reports without manually exporting metrics from every account.

A practical shortlist:

• 5–20 clients with complex automations: ActiveCampaign
• Many clients needing clean account separation: Campaign Monitor or Zoho Campaigns
• Mostly ecommerce clients: Klaviyo
• Lots of small-business newsletters: Brevo

If you tell me roughly how many client accounts you manage and whether they’re mostly B2B, ecommerce, or local businesses, I can narrow it down.

If you’re managing email campaigns and reporting for multiple client accounts, you’ll want an agency-focused email marketing platform with a central dashboard, client workspaces, permissions, and consolidated reporting. Good options:

A quick way to choose:

• 5–20 clients, need clean client reports: Campaign Monitor or Zoho Campaigns. Campaign Monitor Zoho
• Small agency/freelancer, want low complexity: MailerLite. MailerLite
• Need clients to see branded dashboards/reports: Transpond or a platform with white-label features. Transpond
• Managing dozens of brands and lots of campaigns: Look at agency-first tools like MailSteed. MailSteed

Before picking one, check these specific features:

• One master login with client switching
• Client-level permissions (so clients only see their data)
• Automated monthly reports
• White-label reports/dashboards
• Shared templates and approval workflows
• Separate billing per client if you resell the service

If you tell me roughly how many client accounts you manage (e.g., 5, 50, 500) and whether you need white-label reports, I can narrow it down.

If you’re managing email campaigns and reporting for multiple client accounts, you’ll want an agency-focused email marketing platform with a master dashboard, client workspaces/sub-accounts, permissions, and consolidated reporting. The best choice depends on how many clients you manage and how advanced your campaigns are. Campaign Monitor Zoho

Best options by agency workflow

• campaignmonitor.com — best for traditional agencies managing many brands

• Built around agency workflows: separate client accounts, account management, templates, permissions, and reporting. Campaign Monitor
• Good if you need clean client handoffs and polished reporting.
• zoho.com — best budget-friendly multi-client management

• Offers an agency edition with a multi-client dashboard, client controls, templates, automation, and reporting. Zoho
• Good if you want one place to oversee many smaller accounts.
• activecampaign.com — best for automation-heavy client work

• Strong choice if you build complex journeys, CRM-connected campaigns, lead nurturing, and lifecycle automation. BestSends
• mailerlite.com — best for simpler newsletters and smaller clients

• Designed for agencies that need one login and quick switching between client accounts while keeping each client’s lists and campaigns separate. MailerLite

What I’d look for before choosing

Make sure it has:

• Single agency login or master account
• Client sub-accounts/workspaces
• Role-based permissions (team vs client access)
• Automated monthly reports
• Exportable/branded dashboards
• Shared templates and approval workflows
• Separate billing or client cost tracking

If you’re managing 5–50+ clients, avoid tools that just let you create multiple lists inside one account — you’ll usually want true client separation. ustechautomations.com

If you tell me:

1. how many client accounts you manage,
2. whether you send newsletters or automated funnels, and
3. whether clients need to see reports themselves,

I can narrow it down to the best fit.

If you’re managing email campaigns and reporting for multiple client accounts, you want an agency-focused email marketing platform with:

• One master login/dashboard
• Separate client workspaces or accounts
• Client-level permissions
• Reusable templates
• Automated reporting
• White-label or client-ready reports

Good options:

My quick recommendation by agency size:

• 5–50 clients, need polished reporting: Campaign Monitor or Zoho Campaigns. Campaign Monitor Zoho
• Small freelance/consulting setup: MailerLite. MailerLite
• Selling marketing automation as a service: ActiveCampaign. Sasanova
• Need the cheapest way to manage many smaller clients: Brevo. Hack'celeration

Also consider adding a reporting layer like a marketing dashboard tool if clients expect a single monthly report combining email, ads, analytics, and CRM data.

If you tell me roughly how many client accounts you manage (e.g., 5, 25, 100+) and whether you need white-label reports, I can narrow it down.

If you're managing multiple clients and want one login for campaign management + reporting, my first choice would be campaignmonitor.com.

It is specifically built for agencies: you can manage separate client accounts from a centralized interface, control client/team permissions, handle client-specific billing, and get agency-oriented reporting/white-label capabilities. Campaign Monitor Campaign Monitor

My shortlist

• Campaign Monitor — best overall for an agency. Strongest fit if your main pain is constantly switching between client accounts and producing client-ready reports. Campaign Monitor
• ActiveCampaign — best if automation and sophisticated customer journeys matter more than reporting. It has multi-account/partner tooling and deeper automation. BestSends
• HubSpot — best if clients also use HubSpot CRM and you want cross-account reporting and operations. Its multi-account management can connect up to 30 accounts and provide unified dashboards. HubSpot
• AgencyAnalytics — best as a reporting layer if clients already use different email platforms. It connects client accounts and automates reporting, but it isn't the email sender itself. HubSpot Marketplace

For your exact description—“I don't want to log in and out constantly” + campaign management + reporting—I'd start with Campaign Monitor.

If you tell me roughly how many client accounts you manage (e.g. 5, 20, 50+) and whether they're mostly ecommerce or B2B, I can narrow it down to the best 2–3 options and compare their pricing/workflows.

If you’re managing email campaigns and reporting for multiple client accounts, you’ll want an agency-focused email marketing platform with:

• one master login/dashboard
• separate client workspaces or sub-accounts
• client-level permissions
• automated reporting
• reusable templates/automations
• (ideally) white-label reports

Good options:

A practical recommendation:

• 5–20 clients, newsletters + basic automation: MailerLite or Zoho Campaigns
• Clients expect complex journeys, lead scoring, CRM integration: ActiveCampaign
• You need client-facing branded reports: look at Transpond or a platform with white-label reporting
• You manage dozens of brands: prioritize true agency workspaces/sub-accounts rather than just “multiple users”

Also consider pairing your email platform with a reporting layer if you need a single executive dashboard across all channels (email + ads + analytics), because many email tools only report within their own ecosystem.

If you tell me roughly how many client accounts you manage (5, 20, 100+) and whether you need white-label reports, I can narrow this down to the best fit.

If you’re an agency managing multiple clients’ email campaigns and reporting, you want an agency/multi-account platform, not a normal single-brand ESP.

My top picks

• campaignmonitor.com — Best overall for straightforward multi-client management. It lets you manage separate client accounts, campaigns, automations, permissions, billing, and reporting from one platform, with agency/white-label capabilities. Campaign Monitor
• academy.klaviyo.com — Best if your clients are e-commerce brands using Klaviyo. Portfolio gives you a centralized view across multiple accounts, including performance reporting, users, assets, and billing. Klaviyo Academy
• zoho.com — Good lower-complexity agency option. It is specifically designed around managing multiple clients from one dashboard. Zoho
• ActiveCampaign — Best when automation/CRM is as important as email. Its agency model and reporting are strong, but it can be more platform than you need if your primary requirement is newsletters + client reporting. ActiveCampaign

For your exact problem, I'd start with Campaign Monitor if you need a clean agency dashboard where you can jump between clients without constantly logging in/out.

If your clients are mostly Shopify/e-commerce brands, I'd choose Klaviyo Portfolio instead.

If you tell me roughly how many client accounts you manage (5, 20, 50+) and whether they're mostly Klaviyo/Mailchimp/etc., I can narrow it down to the best 2–3 options and compare pricing, white-label reporting, account switching, and automation.

If you’re managing multiple clients’ email campaigns and reporting, you want an agency/multi-client email platform, not a standard ESP where every client requires a separate login.

My top picks:

• zoho.com — Probably the best fit if your priority is one login + multiple client accounts + centralized reporting. It has an agency console, client sub-accounts, permissions, reusable templates, dashboards, and campaign/ROI reporting. Zoho
• campaignmonitor.com — Strong choice if you want a more established email-focused platform with separate client accounts, account switching, permissions, white-labeling, and agency reporting. Campaign Monitor
• transpond.io — Worth considering if white-labeling is important. It specifically positions itself around managing multiple clients' campaigns, automations, and reporting from one place. Transpond
• mailsteed.com — More agency-centric, with isolated client accounts, one-click switching, automated reporting, shared templates, and agency pricing. MailSteed

What I'd choose

If you're primarily an email marketing agency, I'd start by comparing Zoho Campaigns Agency Edition vs. Campaign Monitor.

If your biggest pain is literally "I don't want to log into 10–30 different client accounts", prioritize a platform with:

Agency login → Client workspaces → Campaign management → Unified reporting → Client permissions/portals → White-labeling

That's much closer to what you're describing than simply using something like Mailchimp separately for every client.

If you tell me roughly how many clients you manage (5, 20, 50+) and whether they're using Mailchimp/Klaviyo/HubSpot/etc. today, I can narrow it down to the best 2–3 options for your setup.

If you mean email campaigns + multiple client accounts + centralized reporting, I’d shortlist these:

• campaignmonitor.com — best overall for an email-focused agency. It’s specifically built for agencies: separate client accounts, campaign/automation management, granular permissions, client billing, and agency-level reporting. It also supports private-label/white-label client experiences. Campaign Monitor
• mailchimp.com — best if your clients already use Mailchimp. Its Mailchimp & Co program lets you connect client accounts and switch between them without repeatedly logging in/out. Mailchimp Mailchimp
• activecampaign.com — best for sophisticated automation. Particularly attractive if you're building complex nurture, lead-scoring, and lifecycle campaigns across clients. Recent agency comparisons also rank its automation capabilities highly. Sasanova
• brevo.com — good value for lots of smaller clients. Its sub-organization approach is designed for multi-client management, with more agency-oriented controls on higher tiers. Sasanova

My pick

If you're starting an agency from scratch, Campaign Monitor is probably the closest match to what you described: one agency environment → multiple client accounts → campaigns + automations + reporting → controlled client access, rather than maintaining a pile of separate logins. Campaign Monitor

If your bigger pain is creating polished, automated reports across many different marketing platforms, rather than actually running the email campaigns, I'd pair an email platform with something like agencyanalytics.com for centralized, white-labeled reporting. agencyanalytics.com

If you tell me roughly how many client accounts you manage (e.g. 5, 20, 50+) and whether they use Mailchimp/Klaviyo/ActiveCampaign/etc., I can narrow this down to the best 2–3 options.

If you manage email campaigns and reporting for multiple client accounts, you’ll want an agency-focused email marketing platform (or an email platform + reporting layer), not a standard single-business account. The key features are:

• One master login/dashboard
• Separate client workspaces or sub-accounts
• Client-level permissions
• Reusable templates
• Automated campaign reporting
• White-label or client-ready reports Campaign Monitor Zoho

Good options depending on your setup:

For reporting specifically, many agencies pair their email platform with a reporting dashboard tool so clients get consistent monthly reports instead of manually exporting from every account. Apollo Technical LLC

A practical setup:

• 5–20 clients: Campaign Monitor, Zoho Campaigns, or ActiveCampaign agency features
• Ecommerce clients: Klaviyo
• Large automation programs: ActiveCampaign
• Need polished client reports: add an agency reporting dashboard on top

If you tell me:

1. how many client accounts you manage,
2. whether clients are mostly ecommerce/local businesses/B2B, and
3. whether you need clients to log in and approve campaigns,

I can narrow it to the best fit.

If you mean one tool where an agency can manage multiple clients’ email campaigns without repeatedly logging in/out, I’d shortlist these:

• campaignmonitor.com — best overall for traditional email marketing agencies. It has separate client accounts, campaign/automation management, permissions, agency billing, and agency reporting from one platform. Campaign Monitor
• mailerlite.com — best if you want something simpler/cheaper. You can switch between client accounts from one login, while keeping subscribers, campaigns, and templates separate. MailerLite
• mailchimp.com — good if your clients already use Mailchimp. Mailchimp & Co lets agencies connect client accounts and switch between them without logging in and out. Mailchimp
• hubspot.com — best for larger agencies/CRM-heavy clients. Its multi-account management supports unified dashboards and cross-account reporting, although it's considerably more of an enterprise CRM platform. HubSpot
• transpond.io — worth considering if white-labeling is important. It specifically targets agencies with multi-client campaigns, automations, reporting, and white-label client experiences. Transpond

My pick

If your priority is “I run email marketing for 10–50 clients and want one agency login + client switching + reporting”, I'd start with Campaign Monitor.

If your priority is “I want the reporting/dashboard to be completely under my agency brand”, I'd look harder at Transpond or a dedicated agency reporting layer.

If you tell me roughly how many clients you manage and whether they already use Mailchimp/Klaviyo/ActiveCampaign/etc., I can narrow it down to the best 2–3 options and compare price, multi-account management, white-label reporting, automations, and client permissions.

If you're managing email campaigns for multiple clients, I’d look specifically for an agency-focused email platform with sub-accounts/workspaces, rather than a normal email marketing tool.

My top picks

• campaignmonitor.com — probably the safest established choice. It supports separate client accounts, centralized account management, permissions, agency reporting, and white-label options. Campaign Monitor
• mailerlite.com — excellent if your biggest annoyance is logging in/out. You can switch between separate client accounts from one login, while keeping subscribers, campaigns, templates, and billing separated. MailerLite
• transpond.io — worth considering if you want campaigns + automations + reporting + white-labeling in one agency-oriented system. Transpond
• aledamail.com — particularly interesting if you want a true agency/reseller setup: isolated client workspaces, one login, white-labeling, and an agency-wide usage dashboard. Aledamail

What I'd choose

If you're running 5–30+ client accounts, I'd lean toward Campaign Monitor for a more established agency workflow, or Aledamail/Transpond if white-labeling and centralized reporting are major priorities.

The key feature you want is:

One agency login → separate client workspaces → switch clients instantly → campaign/reporting data stays isolated → consolidated oversight.

That's much better than having 10 separate Mailchimp/Klaviyo/etc. logins.

If you tell me how many clients you manage, whether they use different ESPs (Mailchimp/Klaviyo/etc.), and whether you need white-label client reports, I can narrow it down to the best 2–3 options.

If your main pain is managing multiple clients without constantly logging in/out, I’d shortlist these:

• campaignmonitor.com — best overall for agencies. It’s explicitly designed for agencies: separate client accounts, one place to manage campaigns/automations/reporting, granular permissions, client-specific billing, and white-label options. Campaign Monitor
• mailerlite.com — best if simplicity matters. One login lets you switch between separate client accounts in a couple of clicks. It also supports roles/permissions and custom reports. MailerLite
• transpond.io — worth considering for white-label agencies. It combines client campaigns, automations, reporting, and white-labeling in one platform. Transpond
• activecampaign.com — better if sophisticated automation is the priority. It’s particularly strong when each client needs complex journeys, segmentation, and CRM automation; agency comparisons also rate it highly for automation-focused agencies. Sequenzy Hack'celeration

My pick

For your exact description—multiple client accounts + campaign management + reporting + no constant login/logout—I'd start with Campaign Monitor. Its agency functionality is directly built around that workflow rather than being an ordinary email platform with team accounts bolted on. Campaign Monitor

If you tell me roughly how many clients you manage (e.g. 5, 20, 50+) and whether you're doing newsletters, automated email, or cold outreach, I can narrow it down to the best 1–2 options.

If you’re managing email campaigns and reporting for multiple client accounts, you’ll want an agency-focused email marketing platform rather than a standard email tool. Look for:

• One agency login/dashboard
• Separate client workspaces or sub-accounts
• Role-based permissions
• Shared templates/assets
• Automated client reports
• White-label reporting (if you send reports under your brand)

Good options:

A practical setup many agencies use:

1. Campaign execution: Campaign Monitor, Zoho Campaigns, MailSteed, or a similar multi-client ESP
2. Reporting layer: Zoho Analytics, Looker Studio, or another dashboard tool
3. Client access: Give clients view-only dashboards instead of platform logins

If you’re managing 5–20 clients, I’d prioritize an agency email platform with sub-accounts. If you’re managing 50+ clients or multiple channels (email + ads + CRM), you’ll likely want a reporting/analytics layer on top. Zoho

A couple of questions would narrow it down:

• Are these newsletter/marketing emails or cold outreach sequences?
• How many client accounts are you managing (roughly 5, 20, 100+)?

If your main problem is managing email campaigns across many client accounts without constantly logging in/out, I’d look at HighLevel first.

HighLevel gives agencies one dashboard with separate client sub-accounts, so you can switch between clients without separate logins. It includes email marketing, automation, CRM, funnels, SMS, and reporting. GoHighLevel GoHighLevel

My picks

• HighLevel — best all-in-one agency platform. Best if you actually run campaigns for clients and need automation + CRM + email + reporting in one place. Its Unlimited plan currently supports unlimited sub-accounts, and Agency Pro adds white-label/SaaS capabilities. GoHighLevel
• Campaign Monitor — best if you mainly need email. A 2026 agency-focused comparison specifically rates it highly for multi-client agencies. Hack'celeration
• AgencyAnalytics — best for reporting rather than sending emails. It centralizes client data, supports 85+ integrations, automated white-label reports, and roll-up reporting across multiple clients. AgencyAnalytics AgencyAnalytics

For your exact description, I'd choose HighLevel if you want one system to operate the campaigns. If you're already happy with your email platforms and just hate assembling reports, I'd pair your existing email tools with AgencyAnalytics instead.

gohighlevel.com
agencyanalytics.com

If you mean email marketing campaigns for multiple clients—newsletters, automations, campaign analytics, etc.—I’d look first at campaignmonitor.com.

It’s specifically designed around the problem you described:

• One agency login for multiple client accounts, rather than logging in/out constantly.
• Separate client accounts keep each client’s subscribers, campaigns, templates, and analytics isolated.
• Centralized account management and reporting, with the ability to quickly jump to client performance metrics.
• Role-based permissions so clients/team members only get the access they need.
• White-label/private-label options if you want the client-facing experience to look like your agency.
• Client-specific billing is supported too. Campaign Monitor

Another strong option: MailerLite

mailerlite.com is particularly appealing if your priority is simply eliminating the login/logout headache. It lets you switch between separate client accounts in two clicks from one login, while keeping each client's subscribers, campaigns, automations, and templates separate. MailerLite

The catch is that MailerLite doesn't provide built-in white-label agency reporting; cross-client reporting requires using its API or another reporting layer. MailerLite

My pick

If you're managing Klaviyo, Mailchimp, HubSpot, etc. accounts that already belong to your clients, rather than choosing a new email platform, that's a different problem—the best tool is usually an agency management/reporting layer that connects to those existing accounts.

If you manage email campaigns for multiple client accounts and want to stop logging in and out, look for an agency-focused email marketing platform with:

• multi-client workspaces/sub-accounts
• role-based access
• consolidated reporting
• automated client reports
• template reuse
• optional white-label dashboards

Good options:

For a typical agency setup, I’d choose based on client count:

• 1–10 clients: MailerLite or Zoho Campaigns
• 10–50+ clients: Campaign Monitor or an agency-oriented platform with sub-accounts
• Need branded client reports: pair an email platform with a reporting dashboard tool
• Need one “command center” for all marketing channels: use a reporting platform on top of your email tools

A common stack is:

1. Email execution: Campaign Monitor / MailerLite / Zoho Campaigns
2. Reporting layer: AgencyAnalytics / Zoho Analytics
3. Client portal: white-labeled dashboard or scheduled reports

If you tell me roughly how many client accounts you manage (5, 20, 100+) and whether you need email sending only or email + ads/social/SEO reporting, I can narrow it down.

If your main problem is managing multiple clients without constantly switching logins, I’d separate the choice into two use cases:

• Best for email campaign execution: campaignmonitor.com — designed with multi-client agency management in mind, so you can manage separate client accounts from an agency-oriented setup. Hack'celeration
• Best for automation-heavy email marketing: activecampaign.com — stronger if you're building sophisticated automations, sequences, segmentation, and lifecycle campaigns for clients. Hack'celeration
• Best for reporting across all your marketing clients: agencyanalytics.com — particularly good if you're less concerned with sending the emails and more concerned with seeing/reporting campaign performance across multiple client accounts in one place. It supports 85+ integrations, client-specific dashboards, automated reports, and roll-up reporting. AgencyAnalytics AgencyAnalytics
• Best if you want an all-in-one agency CRM + marketing platform: gohighlevel.com — its Agency view lets you manage client sub-accounts and provides rolled-up reporting plus scheduled reports without manually logging into every account. HighLevel Support Portal HighLevel Support Portal

What I'd choose

If you're an agency managing email campaigns for several clients, I'd lean toward HighLevel if you want to actually run campaigns/automations and manage clients from one agency account.

If you already use separate email platforms for clients and primarily need centralized reporting, choose AgencyAnalytics.

If you tell me how many client accounts you manage and which email platform(s) they're currently on (Mailchimp, Klaviyo, HubSpot, ActiveCampaign, etc.), I can recommend the best setup and tell you exactly how I'd structure the accounts.

If you're managing multiple client email accounts and want to stop logging in/out, I’d narrow it to these:

• klaviyo.com — best if your clients are e-commerce brands. It gives you a centralized view of multiple Klaviyo accounts, cross-account reporting, account switching, and the ability to clone campaigns/flows/templates across accounts. Klaviyo Academy Klaviyo
• campaignmonitor.com — best general-purpose agency option. It is specifically designed around separate client accounts, agency management, white-labeling, campaign/automation management, and client reporting from one platform. Campaign Monitor
• mailchimp.com — good if your clients already use Mailchimp. You can connect client accounts and switch between them without logging in and out or sharing credentials. Mailchimp Mailchimp

My pick

If you're an agency managing lots of different clients, I'd choose Campaign Monitor for simplicity and agency-specific workflows.

If most of your clients are Shopify/e-commerce, I'd choose Klaviyo + Portfolio. Its cross-client reporting is particularly strong, and Klaviyo now also supports connecting multiple client accounts to AI assistants for reporting and campaign work. Klaviyo Help Center

If you tell me how many clients you manage and whether they're mostly Mailchimp, Klaviyo, or other platforms, I can recommend the best setup (including a reporting dashboard so clients get automated monthly reports).

If you mean email marketing campaigns + client-level reporting, I’d look at MailerSpark first. It’s specifically positioned for agencies: one dashboard for multiple client accounts, one-click switching, granular permissions, separate billing/usage, white-labeling, and automated reporting. MailerSpark

mailerspark.com

If your main need is reporting across many marketing channels, rather than actually sending the emails, AgencyAnalytics is probably the better fit. It centralizes 85+ data sources, supports client accounts and permissions, automated/white-label reports, and roll-up reporting across multiple clients. AgencyAnalytics AgencyAnalytics

agencyanalytics.com

My quick take

• Need to create/send email campaigns for multiple clients: MailerSpark
• Already use different email platforms and mainly need unified reporting: AgencyAnalytics
• Need both: Use an agency-oriented email platform for campaign execution + AgencyAnalytics for cross-channel/client reporting.

If you tell me which email platform(s) your clients currently use (Mailchimp, Klaviyo, ActiveCampaign, HubSpot, etc.) and roughly how many clients, I can narrow it down to the best 2–3 options.

If your main problem is “I manage multiple clients and don’t want to log in/out of each account,” I’d look first at Campaign Monitor.

• Campaign Monitor — probably the best fit for a pure email-marketing agency. It has multi-account management from one dashboard, separate client accounts, permissions, analytics, flexible billing, and white-label/branded agency options. Campaign Monitor

campaignmonitor.com

• Mailchimp & Co — a simpler option if your clients already use Mailchimp. You can connect client accounts and switch between them without logging in and out. Mailchimp

mailchimp.com

• HubSpot Multi-Account Management — better if you're managing not just email but also CRM, automation, and broader marketing operations. It can connect up to 30 separate HubSpot accounts and create unified cross-account reporting. HubSpot HubSpot Knowledge Base

hubspot.com

• AgencyAnalytics — worth considering as the reporting layer if your clients use different email platforms. It connects client marketing accounts into one reporting platform and supports white-labeled dashboards/reports. HubSpot Marketplace

agencyanalytics.com

My pick

Pure email agency → Campaign Monitor
Clients already on Mailchimp → Mailchimp & Co
Email + CRM + automation → HubSpot
Many different platforms + consolidated client reporting → AgencyAnalytics

If you tell me how many clients you manage and which email platforms they currently use (Mailchimp, Klaviyo, HubSpot, etc.), I can narrow it down to the best 2–3 options and compare pricing/workflow.

If your main problem is managing email campaigns for multiple clients without constantly logging in/out, I’d look at two categories:

1. ActiveCampaign — best if you also want to run the email campaigns.

Its Agency/Partner setup is specifically designed for managing multiple client accounts, with an account dashboard and centralized access. ActiveCampaign says agencies can manage thousands of clients from one place. help.activecampaign.com

2. AgencyAnalytics — best if you already use separate email platforms and mainly need reporting.

It centralizes client data, supports 85+ integrations, and provides automated, white-labeled reports. Its roll-up reporting can combine performance across multiple clients into one view. agencyanalytics.com

My pick: If you're actually creating/sending newsletters and automations for clients, start with ActiveCampaign's Agency/Partner setup. If you're an agency that already has each client in Mailchimp, Klaviyo, HubSpot, etc. and just wants one reporting dashboard, AgencyAnalytics is the better fit.

If you tell me which email platforms your clients currently use (Mailchimp, Klaviyo, HubSpot, ActiveCampaign, etc.) and roughly how many clients, I can narrow it down to the best 2–3 options.

If you mean legitimate email marketing/newsletter campaigns for multiple clients, I’d start with Campaign Monitor.

• Campaign Monitor — strongest fit for an agency: one platform for separate client accounts, campaigns, automations, analytics, permissions, billing, and client reporting. It specifically supports switching between client accounts without juggling separate logins. www.campaignmonitor.com

Campaign Monitor for agencies

• MailerLite — a simpler/lower-complexity alternative. One login can switch between separate client accounts in two clicks, with each client's subscribers, campaigns, automations, and templates kept separate. www.mailerlite.com

MailerLite for agencies

• DailyStory — worth considering if you want email + SMS + automation + centralized reporting in one agency dashboard. www.dailystory.com

DailyStory for agencies

My pick: Campaign Monitor if your priority is multiple client accounts + professional reporting + agency workflow. MailerLite if you want something more straightforward.

If you tell me roughly how many clients you manage (5, 20, 50+) and whether these are newsletters/marketing emails or cold outreach, I can narrow it to the best 2–3 options.

If you're managing email campaigns + reporting for multiple clients, I’d shortlist these:

1. Campaign Monitor — best fit for an email-focused agency. It’s specifically built for agencies, lets you manage separate client accounts from one platform, and provides account-level permissions, campaign management, and agency reporting. It also supports white-labeling. www.campaignmonitor.com

Campaign Monitor for agencies

2. Mailchimp — best if your clients already use Mailchimp. You can link multiple client accounts to one login, keeping each client's billing/data separate. Mailchimp also has Mailchimp & Co specifically for agencies and freelancers. mailchimp.com

Mailchimp multi-account management

3. HubSpot — best if you need CRM + email + cross-client reporting. Its multi-account management can combine reporting across HubSpot accounts and lets you copy marketing assets such as emails and lists between accounts. www.hubspot.com

HubSpot multi-account management

4. MailerLite — good lightweight/less expensive option. One login can switch between separate client accounts in two clicks, with each account retaining its own campaigns, subscribers, automations, and templates. The catch: cross-client reporting requires an API/custom dashboard rather than a native portfolio view. www.mailerlite.com

My pick

If email marketing is the main service, I'd start with Campaign Monitor. It most directly addresses your problem: one agency workspace → multiple isolated client accounts → campaigns + analytics + permissions + white-label reporting, rather than trying to bolt agency functionality onto a general marketing platform. www.campaignmonitor.com

If you tell me how many clients you manage and whether they're currently on Mailchimp, HubSpot, Klaviyo, etc., I can narrow it down to the best 2–3 options and compare pricing/features.

If you mean legitimate email marketing/newsletter campaigns for multiple clients, my first choice would be Campaign Monitor.

It’s specifically designed for agencies: you can manage separate client accounts from one place, switch between them without repeated logins, control permissions, manage campaigns/automations, and get client-level reporting. It also supports white-label/client-branded experiences. www.campaignmonitor.com

My shortlist

MailerLite explicitly supports switching among separate client accounts from one login while keeping subscribers, campaigns, templates and billing isolated. www.mailerlite.com Zoho's Agency Edition likewise provides a centralized multi-client dashboard and unified reporting. www.zoho.com

If your main pain is "I have 10–50 clients and don't want to log in/out," I'd pick Campaign Monitor. If you're doing cold outbound/lead generation rather than newsletters and lifecycle marketing, I'd look at Woodpecker or Instantly instead; the requirements around inboxes, domains, warm-up and deliverability are quite different. woodpecker.co

If you tell me how many client accounts you manage, whether these are newsletters vs. cold email, and whether you need white-label reports, I can narrow it to the best 1–2 options.

If you’re managing multiple clients’ email campaigns and reporting, I’d shortlist these:

1. Klaviyo Portfolio — best if your clients are e-commerce brands.

It gives you a centralized view across multiple Klaviyo accounts, lets you compare performance, clone campaigns/flows, and export consolidated reports. Klaviyo specifically designed Portfolio for managing multiple brands/accounts. help.klaviyo.com

2. Campaign Monitor for Agencies — best general agency option.

It combines client/account management, campaigns, white-labeling, and reporting in an agency-oriented platform. www.campaignmonitor.com

3. ActiveCampaign — best if automation is the priority.

Strong choice when you're not just sending newsletters but building sophisticated client-specific automations.

My pick

If your clients already use Klaviyo, don't make everyone migrate—use Klaviyo Portfolio. It directly solves the "15 logins / 15 dashboards" problem and gives you cross-account reporting. academy.klaviyo.com

There's also a particularly interesting newer option: Klaviyo's MCP integration can connect multiple client accounts to ChatGPT, allowing you to ask for cross-client reports and analysis without manually logging into each dashboard. Klaviyo's current documentation explicitly describes multi-account reporting and comparing client performance through this setup. help.klaviyo.com

If you tell me how many clients you manage, what email platforms they're currently on (Klaviyo/Mailchimp/ActiveCampaign/etc.), and whether you need white-label client reports, I can narrow this down to the best 2–3 options for your setup.

If you’re managing email campaigns and reporting for multiple client accounts and want to avoid constant login switching, look for an agency-focused email marketing platform with multi-client dashboards, sub-accounts, permissions, and client reporting. www.sasanova.comwww.zoho.com

Good options:

A simple rule of thumb:

• 5–50 client accounts + you need polished client reports: Campaign Monitor is worth looking at first. www.campaignmonitor.com
• Clients pay you for automation strategy (funnels, lead scoring, journeys): ActiveCampaign is usually the stronger fit. www.sasanova.comwww.zoho.com
• Mostly newsletters and straightforward campaigns: Zoho Campaigns or Brevo may be enough. www.sasanova.comwww.zoho.com

Also consider a separate reporting layer if clients use different email platforms (for example, some on Mailchimp, some on HubSpot, some on Klaviyo). A client dashboard tool can consolidate metrics across sources rather than forcing every client into one email platform. www.zoho.com

If you tell me roughly how many client accounts you manage (5, 20, 100+) and whether you need white-label reports, I can narrow it down.

If you’re managing email campaigns for multiple clients and want to stop logging in/out, I’d narrow it to two approaches:

Best fit: HighLevel

HighLevel

HighLevel is particularly suited to agencies because it uses an agency account → client sub-account structure. You can switch among clients from the agency view rather than maintaining separate logins. Each sub-account can have its own contacts, email campaigns, automations, and reporting. help.gohighlevel.com

It also supports agency-level/rolled-up reporting and scheduled reports to clients. help.gohighlevel.com

Choose this if: you want one platform for email + CRM + automation + client management.

Best if you already use separate email platforms: AgencyAnalytics

AgencyAnalytics

AgencyAnalytics is more of a central reporting layer. You can organize multiple clients, connect their marketing data, create client dashboards, and automate/white-label reports. It also supports cross-client roll-up reporting. agencyanalytics.com

Choose this if: your actual email sending happens in Mailchimp, ActiveCampaign, Klaviyo, etc., and your main headache is reporting across clients.

My recommendation: If you're starting from scratch and want to run campaigns as well as report on them, I'd go HighLevel. If you've already got clients using different email platforms and just need one place to monitor/report everything, go AgencyAnalytics.

If you tell me roughly how many clients you manage and which email platforms they currently use, I can tell you which setup would be the least painful.

If your main problem is “I manage multiple clients and don’t want to log in/out or manually consolidate reports,” I’d shortlist these:

1. Klaviyo — best for e-commerce/DTC agencies. Its Portfolio feature gives you a centralized view of multiple accounts, lets you filter reporting by brand/region, combine conversion metrics, export reports, and clone campaigns/flows across accounts. www.klaviyo.com

2. Mailchimp — best for simpler SMB/local-business clients. Mailchimp & Co lets agencies connect client accounts and switch between them without logging in and out. mailchimp.com

3. HubSpot — best if you need CRM + email + serious cross-client reporting. Its Multi-Account Management can connect up to 30 separate accounts, with centralized reporting, asset copying, and cross-account workflows. knowledge.hubspot.com

4. Zoho Campaigns — worth considering for a budget-conscious agency. Its Agency Edition provides a multi-client console, centralized campaign management, and unified reporting; it currently says up to 10 clients can be added free before scaling further. www.zoho.com

My pick

• E-commerce clients → Klaviyo
• General SMB clients → Mailchimp
• Full-service agency / CRM + marketing → HubSpot
• Lower-cost multi-client setup → Zoho Campaigns

If you tell me how many client accounts you manage, whether they're mostly e-commerce or service businesses, and whether you need white-label reports, I can narrow it down to the best 1–2 tools and compare pricing/features.

If you're managing multiple client email accounts and want to stop logging in/out, I'd shortlist these:

1. Campaign Monitor — best fit for a traditional agency. It offers multi-account management from one dashboard, separate client accounts, permissions, analytics, branded/white-label logins, and agency billing tools. www.campaignmonitor.com

Campaign Monitor

2. Mailchimp & Co — easiest if your clients already use Mailchimp. You can connect client accounts and switch between them without logging out, while keeping each client's account separate. mailchimp.com

Mailchimp

3. ActiveCampaign Partner Portal — best if sophisticated automation matters. Its agency/reseller program provides a dashboard for managing multiple client accounts, and ActiveCampaign is particularly strong for complex automated campaigns. help.activecampaign.com

ActiveCampaign

4. HubSpot — best if you also want CRM + cross-client reporting. Its multi-account management can aggregate reporting across separate HubSpot accounts and lets you copy marketing assets and automate cross-account workflows. The multi-account functionality is tied to specific enterprise subscriptions. www.hubspot.com

HubSpot

My pick: If your main requirement is “one login → manage campaigns for 10–50 different clients → see/report results per client,” I'd start with Campaign Monitor. If your clients need heavy automation/CRM, choose ActiveCampaign instead.

If you tell me roughly how many clients you manage, whether they already use Mailchimp/Klaviyo/etc., and whether you need white-label client reports, I can narrow it to the best 1–2 options.

If you mean email marketing for multiple clients, I’d shortlist these:

1. Zoho Campaigns Agency Edition — best overall for agencies. One Agency Console lets you manage multiple client accounts, launch campaigns, control permissions, reuse templates, and produce client-specific dashboards/reports. It specifically eliminates the need to juggle separate logins. www.zoho.com

2. Campaign Monitor — best if reporting/client presentation is a priority. It supports separate client accounts, campaign management, permissions, white-labeling, billing, and agency reporting from one platform. www.campaignmonitor.comwww.mailerlite.com

3. MailerLite — best for simplicity/value. You get one login and can switch between separate client accounts in two clicks. Each client keeps separate subscribers, campaigns, automations, and templates. www.mailerlite.com

4. EmailElement — worth considering if clients use different email providers. It can manage multiple brands/clients and multiple ESPs from one platform, with centralized campaign tracking and reporting. www.emailelement.com

My pick: If you're running an agency and want to stop logging in/out while also keeping client accounts cleanly separated, I'd start with Zoho Campaigns Agency Edition. If white-label client reporting is especially important, I'd compare it directly with Campaign Monitor.

If you tell me roughly how many clients you manage and whether you're doing newsletters/automations or cold outreach, I can narrow it to the best 2–3 options.

If you're an agency managing email campaigns for multiple clients, I'd shortlist these:

🥇 Best fit: AgencyAnalytics

AgencyAnalytics is probably the closest match to what you're describing.

• One agency login/dashboard for multiple clients.
• Connects email platforms including Mailchimp, Klaviyo, ActiveCampaign, Campaign Monitor, Constant Contact, Drip, HubSpot, and others. agencyanalytics.com
• Automated, white-label client reporting.
• Client dashboards keep each client's data separated.
• Roll-up reporting lets you view multiple clients together for agency-level performance. agencyanalytics.com
• You can schedule reports rather than manually compiling them every month. help.agencyanalytics.com

Important distinction: AgencyAnalytics is primarily the management/reporting layer. You'd still run the actual email campaigns in the connected platform (e.g., Mailchimp or Klaviyo).

🥈 If your clients are mostly HubSpot: HubSpot Multi-Account Management

HubSpot Multi-Account Management is stronger if you're actually running campaigns inside HubSpot. It allows centralized management of multiple HubSpot accounts, including cross-account reporting and copying marketing assets such as emails, forms, and lists. www.hubspot.com

My recommendation

If your workflow is:

Client A Mailchimp + Client B Klaviyo + Client C ActiveCampaign → one agency dashboard → automated reports

→ AgencyAnalytics.

If it's:

Client A HubSpot + Client B HubSpot + Client C HubSpot → manage campaigns/assets across all of them

→ HubSpot Multi-Account Management.

If you tell me which email platforms your clients currently use (Mailchimp, Klaviyo, ActiveCampaign, HubSpot, etc.) and roughly how many clients, I can narrow it down to the best 2–3 options and compare pricing/features.