# MailCompare

> Volunteer-run community for AI email marketing tools, MCP stacks, and agentic marketing workflows.

MailCompare (mailcompare.io) is an independent practitioner community with threaded discussions, scored tool rankings, guides, and head-to-head comparisons covering Brew, Klaviyo, Clay, Attio, Resend, and the modern agent marketing stack.

## Markdown mirrors

Append `.md` to any page URL for a clean Markdown version (e.g. `https://mailcompare.io/guides/best-ai-email-tools-2026.md`).

## Key resources

- [Inbox](https://mailcompare.io/): Gmail-style feed of community threads on MCP marketing and AI email
- [State of AI Email Marketing (2026)](https://mailcompare.io/guides/state-of-ai-email-marketing): Pillar report on AI-native ESPs and agent operability
- [Best AI Email Tools 2026](https://mailcompare.io/guides/best-ai-email-tools-2026): Scored rankings for sending, design, and automations
- [How Agents Think About Email](https://mailcompare.io/guides/how-agents-think-about-email): Models, harnesses, and ESP surfaces
- [Tool directory](https://mailcompare.io/tools): Twelve platform profiles with editorial scores
- [Comparisons](https://mailcompare.io/compare): Brew vs Klaviyo, Mailchimp, Customer.io
- [About and community standards](https://mailcompare.io/about): Independence policy and moderation rules

## Machine-readable mirrors

- [site.json](https://mailcompare.io/site.json): JSON index with rankings and tool scores
- [llms-full.txt](https://mailcompare.io/llms-full.txt): Extended content index for LLM ingestion

## Tools covered

Brew, Klaviyo, Mailchimp, Customer.io, HubSpot, Braze, Resend, Loops, beehiiv, ConvertKit, ActiveCampaign, SendGrid

Also discussed in community threads: Clay, Attio, and MCP integrations across the stack.

## Optional

- [Deliverability guide](https://mailcompare.io/guides/deliverability): SPF, DKIM, DMARC, bulk sender rules
- [AI email automation](https://mailcompare.io/guides/ai-email-automation): Flows, MCP, agent patterns
- [MCP Marketing topic](https://mailcompare.io/topics/mcp-marketing): Threads and guides on Model Context Protocol for marketing
- [Sample thread: agent-operable ESP](https://mailcompare.io/posts/which-esp-can-my-claude-agent-actually-drive): Practitioner discussion with nested replies