What Claude (Anthropic) with web search answered for email marketing software (agencies) on 2026-09-13

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-13

Coverage: Claude (Anthropic) with web search. Other engines not included.

The question asked, verbatim: best email marketing software for agencies

Brands named, in the order the engine gave

1. Klaviyo mentioned
   Klaviyo - default for ecommerce clients.
2. Shopify mentioned
   Deepest Shopify/WooCommerce integration, behavior-based segmentation, and revenue-attribution reporting you can hand to a client without rebuilding it.
3. WooCommerce mentioned
   Deepest Shopify/WooCommerce integration, behavior-based segmentation, and revenue-attribution reporting you can hand to a client without rebuilding it.
4. ActiveCampaign mentioned
   ActiveCampaign - default for B2B, SaaS, and service clients.
5. GoHighLevel mentioned
   GoHighLevel - if you want to resell email as your own product.
6. Campaign Monitor mentioned
   Campaign Monitor - best pure multi-client management.
7. Brevo mentioned
   Brevo - best price-per-send when clients are cost-sensitive.
8. Constant Contact mentioned
   Constant Contact - worth it mainly for the partner program, not the product.
9. MailerLite mentioned
   Also worth a look: MailerLite if you want something cheap and genuinely pleasant for small clients (paid plans strip its branding from emails and forms, but there's no rebranded platform on your domain), and Moosend as a low-cost option with real agency sub-accounts and flexible billing.
10. Moosend mentioned
    Also worth a look: MailerLite if you want something cheap and genuinely pleasant for small clients (paid plans strip its branding from emails and forms, but there's no rebranded platform on your domain), and Moosend as a low-cost option with real agency sub-accounts and flexible billing.

Sources the engine cited

The answer, as recorded

## Short answer There's no single winner - the right pick depends mostly on whether your clients are ecommerce or B2B/service, and whether you need to resell under your own brand. Here's how I'd rank them. **1. Klaviyo - default for ecommerce clients.** Deepest Shopify/WooCommerce integration, behavior-based segmentation, and revenue-attribution reporting you can hand to a client without rebuilding it. Its agency partner program gives you a client dashboard and referral revenue, but note it's *not* white-label - Klaviyo branding stays visible, and per-contact pricing compresses your margin as client lists grow. ([emailsendx.com](https://emailsendx.com/blog/best-white-label-email-marketing-platforms-2026), [omnisend.com](https://www.omnisend.com/blog/email-marketing-software-for-agencies/)) **2. ActiveCampaign - default for B2B, SaaS, and service clients.** The best automation logic of the mainstream tools, plus a usable built-in CRM, so it covers lead nurture as well as broadcast. The catch is agency economics: you pay per client account (Plus tier ~$49/mo each, so ~$490+/mo across ten clients) with no white-labeling. ([builts.ai](https://builts.ai/blog/gohighlevel-vs-activecampaign/), [capterra.com](https://capterra.com/compare/79367-156699/ActiveCampaign-vs-Klaviyo)) **3. GoHighLevel - if you want to resell email as your own product.** Flat ~$297/mo Unlimited plan covering unlimited sub-accounts with genuine white-label branding, which is by far the best margin structure of anything here. Trade-off: it's an all-in-one agency OS, not a best-in-class ESP - email automation and deliverability tooling are shallower than ActiveCampaign or Klaviyo, and you own more of the support burden. ([clonepartner.com](https://clonepartner.com/blog/activecampaign-vs-gohighlevel-2026-the-ctos-technical-comparison/)) **4. Campaign Monitor - best pure multi-client management.** Its team/client hub lets you run many client accounts from one login with granular roles and permissions, and it's built for agency-style volume sending. Weaker automation depth than the top two. ([campaignmonitor.com](https://www.campaignmonitor.com/blog/email-marketing/email-marketing-platforms-for-agencies/)) **5. Brevo - best price-per-send when clients are cost-sensitive.** Send-volume pricing rather than contact-count pricing, which is a big deal for clients with large but low-engagement lists. Sub-accounts exist, but real white-labeling is gated to Enterprise tiers - Brevo branding persists on unsubscribe pages and tracking domains by default. ([blog.mailfence.com](https://blog.mailfence.com/white-label-email-marketing-platforms/), [emailsendx.com](https://emailsendx.com/blog/best-white-label-email-marketing-platforms-2026)) **6. Constant Contact - worth it mainly for the partner program, not the product.** The Multi-Account Solution gives you client sub-accounts and a central portal, and the Agency Partner Program pays ~18% referral commission plus lead flow. The platform itself is entry-level; I'd only recommend it for small local-business clients. ([leadsie.com](https://www.leadsie.com/blog/best-email-marketing-software), [emailtooltester.com](https://www.emailtooltester.com/en/blog/email-marketing-software-for-agencies/)) **Also worth a look:** **MailerLite** if you want something cheap and genuinely pleasant for small clients (paid plans strip its branding from emails and forms, but there's no rebranded platform on your domain), and **Moosend** as a low-cost option with real agency sub-accounts and flexible billing. ([blog.mailfence.com](https://blog.mailfence.com/white-label-email-marketing-platforms/), [emailtooltester.com](https://www.emailtooltester.com/en/blog/email-marketing-software-for-agencies/)) ## The thing I'd actually optimize for Ignore template editors - every one of these is fine there. The features that determine whether an agency setup falls apart at 10+ clients are: **isolated sending reputation per client** (so one client's bad list doesn't tank everyone's deliverability), **per-account billing** so you can pass costs through cleanly, **an open API** for reporting, and **client-ready reports you don't rebuild by hand each month**. Two caveats on the above: a lot of "best email software for agencies" content is affiliate-driven, and the specific dollar figures I cited come from comparison blogs rather than vendor pricing pages - verify current pricing directly with each vendor, and ask about unadvertised agency/bulk discounts, which most of these platforms offer but don't list publicly. **Sources:** - https://www.leadsie.com/blog/best-email-marketing-software - https://www.emailtooltester.com/en/blog/email-marketing-software-for-agencies/ - https://www.campaignmonitor.com/blog/email-marketing/email-marketing-platforms-for-agencies/ - https://emailsendx.com/blog/best-white-label-email-marketing-platforms-2026 - https://blog.mailfence.com/white-label-email-marketing-platforms/ - https://builts.ai/blog/gohighlevel-vs-activecampaign/ - https://clonepartner.com/blog/activecampaign-vs-gohighlevel-2026-the-ctos-technical-comparison/ - https://www.omnisend.com/blog/email-marketing-software-for-agencies/ - https://capterra.com/compare/79367-156699/ActiveCampaign-vs-Klaviyo

Markdown edition · the question page, with every recording · Answer Watch · AEO Watch

Answer Watch records what one AI answer engine said on one date, nothing more. Each page names the engine and the model, carries the date the question was asked, and lists the brands that appeared in the answer in the order the engine gave them, with the sources it cited. It is a measurement, not a ranking, not a recommendation and not a claim about the world. Brands that did not appear in an answer are not named on any public page. Coverage: Claude (Anthropic) with web search. Other engines not included.