What Claude (Anthropic) with web search answered for email marketing software (agencies) on 2026-09-07

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-07

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 recommended
   Klaviyo - the default if your clients are ecommerce (Shopify/WooCommerce/BigCommerce).
2. Shopify recommended
   Klaviyo - the default if your clients are ecommerce (Shopify/WooCommerce/BigCommerce).
3. WooCommerce recommended
   Klaviyo - the default if your clients are ecommerce (Shopify/WooCommerce/BigCommerce).
4. BigCommerce recommended
   Klaviyo - the default if your clients are ecommerce (Shopify/WooCommerce/BigCommerce).
5. ActiveCampaign recommended
   ActiveCampaign - the best generalist pick for a mixed client roster (B2B, services, ecommerce).
6. Agency recommended
   Agency sub-accounts live in the Enterprise tier via their Reseller/Agency program - custom-quoted, not public.
7. Campaign Monitor recommended
   Campaign Monitor - the most explicitly agency-shaped product on this list.
8. Brevo recommended
   Brevo - best value when clients need email plus SMS plus transactional sending under one roof, with a usable CRM.
9. MailerLite recommended
   MailerLite - the budget option that isn't embarrassing.
10. BigMailer recommended
    BigMailer - the specialist.
11. Omnisend mentioned
    - 8 best email marketing software for agencies - Omnisend (https://www.omnisend.com/blog/email-marketing-software-for-agencies/)

Sources the engine cited

The answer, as recorded

For agencies the deciding factors are different from what a single brand cares about: client sub-accounts with isolated lists and sending reputation, granular team permissions, white-label/branded logins, reporting you can hand a client without rebuilding it, and reseller/markup billing. Ranked by what I'd actually recommend: **1. Klaviyo** - the default if your clients are ecommerce (Shopify/WooCommerce/BigCommerce). Deepest behavioral segmentation and revenue attribution in the category, and its partner program is built around agencies managing multiple stores. Downside: it's the most expensive per contact, and pricing is contact-based with SMS billed separately. **2. ActiveCampaign** - the best generalist pick for a mixed client roster (B2B, services, ecommerce). Strongest automation-builder-plus-CRM in one tool, so you're not stitching together an ESP and a pipeline tool. Agency sub-accounts live in the Enterprise tier via their Reseller/Agency program - custom-quoted, not public. Notably cheaper than Klaviyo at equivalent contact tiers (~$140/mo less at 50k contacts). **3. Campaign Monitor** - the most explicitly agency-shaped product on this list. Purpose-built agency dashboard with per-client sub-accounts, branded login on your own domain/logo/colors, and flexible billing with markup so you can resell at your own price. Pick this if white-labeling is the point rather than a nice-to-have. **4. Brevo** - best value when clients need email plus SMS plus transactional sending under one roof, with a usable CRM. Sending-volume pricing rather than contact-count pricing helps a lot when clients have big, low-engagement lists. **5. MailerLite** - the budget option that isn't embarrassing. Clean builder, unlimited landing pages on paid plans, genuinely fast to set up a small client. Best for creator/local-business clients where an ActiveCampaign seat can't be justified. **6. BigMailer** - the specialist. Purpose-built white-label platform for agencies and franchises running many brands (up to 100 sub-accounts and team members from one login), and cheap at 100k+ subscribers across locations. Narrow, but excellent at the multi-brand case. **7. HubSpot Marketing Hub** - only worth it when the client is buying the whole CRM-plus-marketing stack and you're a Solutions Partner earning margin on the platform itself. Overkill and overpriced if you just need to send email. Two practical notes: get clients on **dedicated IPs and their own authenticated sending domain** (SPF/DKIM/DMARC) wherever volume justifies it, so one client's bad list can't damage another's deliverability - this is the single most common way agency setups go wrong. And prefer platforms that let the client own the account with you on delegated access; it makes offboarding clean and removes the "you're holding our list hostage" conversation. Sources: - [Email Marketing Software for Agencies: 6 Top Platforms for 2026 - EmailToolTester](https://www.emailtooltester.com/en/blog/email-marketing-software-for-agencies/) - [11 Best Email Marketing Software for Agencies in 2026 - Leadsie](https://www.leadsie.com/blog/best-email-marketing-software) - [11 White-Label Email Marketing Platforms - Campaign Monitor](https://www.campaignmonitor.com/blog/email-marketing/white-label-email-marketing-platforms/) - [9 Best White-Label Email Marketing Platforms - BigMailer](https://www.bigmailer.io/white-label-email-marketing-platforms/) - [ActiveCampaign Pricing 2026: Every Plan Compared - BuyerSprint](https://buyersprint.com/2026/05/08/activecampaign-pricing-2026/) - [8 best email marketing software for agencies - Omnisend](https://www.omnisend.com/blog/email-marketing-software-for-agencies/) - [10 Best Email Marketing Software For Agencies In 2026 - The Digital Project Manager](https://thedigitalprojectmanager.com/tools/email-marketing-software-for-agencies/)

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.