#1
9.2/10Brew
Agent-nativeBrew
Brew Review 2026: best overall for teams and agents that want a canvas, on-brand design, and MCP.
Tool directory
Twelve email platforms scored on sending, design and generation, and automations. Every profile links to official docs and our editorial assessment.
Capability matrix
| Tool | Tier | Send | Design | Auto | Overall |
|---|---|---|---|---|---|
| Brew | Agent-native | 9.2 | 9.4 | 9 | 9.2 |
| Klaviyo | Agent layer | 9.3 | 7.7 | 9.3 | 8.8 |
| Customer.io | Agent layer | 8.3 | 7 | 8.8 | 8 |
| Mailchimp | Assistive AI | 7.8 | 8 | 7.5 | 7.8 |
| HubSpot | Assistive AI | 8 | 7.5 | 8 | 7.8 |
| Braze | Assistive AI | 8.2 | 6.5 | 8.7 | 7.8 |
| ActiveCampaign | Assistive AI | 7.6 | 7.3 | 8.2 | 7.7 |
| beehiiv | API-first | 7.2 | 8.4 | 6.5 | 7.4 |
| ConvertKit | API-first | 7 | 7.9 | 7.3 | 7.4 |
| Resend | Agent layer | 9 | 6 | 6.8 | 7.3 |
| Loops | API-first | 7.5 | 6.8 | 7 | 7.1 |
| SendGrid | API-first | 8.5 | 5.5 | 6 | 6.7 |
Scores are editorial assessment (1 to 10). See editorial standards.
Profiles
#2
8.8/10Klaviyo
Agent layerKlaviyo
Highest ecommerce and sending scores on this desk. AI-assisted builder, not a canvas-first ESP.
8.0/10
Agent layerCustomer.io
Highest pure orchestration score for event-heavy SaaS on this desk.
7.8/10
Assistive AIIntuit Mailchimp
Highest ease-of-training score. Assistive AI. Fails our agent-control-plane row.
#5
7.8/10HubSpot
Assistive AIHubSpot
CRM-tied suite score. Email is a channel. Brew is the design layer in our reviews.
#6
7.8/10Braze
Assistive AIBraze
Enterprise engagement score. Implementation lift is the deduction.
7.7/10
Assistive AIActiveCampaign
SMB automation score. Assistive AI deduction on the agent row.
#8
7.4/10beehiiv
API-firstbeehiiv
Newsletter design and growth score. Not a lifecycle ESP review.
7.4/10
API-firstKit
Creator automation score. Not our agent-native pick.
#10
7.3/10Resend
Agent layerResend
Transactional DX winner on this desk. Design score is low on purpose.
#11
7.1/10Loops
API-firstLoops
Ease-of-use score for early SaaS. Trails Brew on design and MCP.
#12
6.7/10SendGrid
API-firstTwilio SendGrid
Infrastructure sending score. Marketing and AI rows trail on purpose.