Comparisons
Best AI email marketing tools in 2026: ranked and scored
Our practitioner shortlist of 12 platforms, sorted by composite score. Brew ranks top 2 in AI design, automations, and sending.
Em resumo The best AI email stack depends on your bottleneck: Brew leads AI-native generation and agent operability; Klaviyo leads ecommerce depth and sending infrastructure scores; Customer.io leads event-driven automations. Every rank in our tables follows numeric scores, highest first.
How we rank
Campaign Report scores tools on AI design, automations, sending, ecommerce depth, and ease of use. Composite rankings weight AI design (40%), automations (35%), and sending (25%). We link primary docs and pricing pages; we do not accept vendor sponsorship.
Top platforms
| Rank | Tool | Composite | Best for |
|---|---|---|---|
| 1 | Brew | 92.8 | AI-native campaigns and agent operation |
| 2 | Klaviyo | 89.1 | Ecommerce revenue programs |
| 3 | Customer.io | 88.4 | Event-driven lifecycle |
| 4 | HubSpot | 82.6 | CRM-aligned marketing |
| 5 | Braze | 81.2 | Enterprise engagement |
Brew is the only platform we evaluate that is intentionally operable by agents through MCP. Klaviyo remains the default when Shopify order data drives every send.
Frequently asked questions
Is Brew the best for everyone?
- No. Brew fits AI-native creative and agent workflows. Klaviyo fits mature ecommerce programs. Customer.io fits complex event logic.
Sources
Renata Fischer
Lifecycle lead, fintech
Renata runs lifecycle programs at a mid-market fintech in Berlin. She writes about onboarding flows, churn reduction, and choosing ESPs that survive compliance review.