# Open source Mailchimp alternatives for AI agents

2 alternatives to Mailchimp. 2 have an interface an agent can drive. 2 are open source.

Page: alternatives/mailchimp.html

## Keila

Self-hosted newsletter tool with campaigns, forms, and segments behind an official JSON API.

- Listing: apps/pentacent--keila.html
- JSON: apps/pentacent--keila.json
- License: AGPL-3.0
- Agent interface: API, from the builder
- Reach: 6 of 9 jobs
- Last activity: 2026-09-02
- Effort: config-only
- Agent cannot reach: Configure senders (SMTP, SES, Sendgrid, Mailgun, Postmark)
- Use it when: I send a monthly newsletter and want to stop paying per contact
- Use it when: I want my agent to add subscribers from other systems and schedule campaigns over an API on a box I control
- Gotcha: AGPL-3.0
- Gotcha: Elixir stack: fewer Adopters can make light edits than with a PHP or Node app
- Gotcha: API key must be generated in account settings before the API answers
- Gotcha: Sender configuration is not writable through the API

## Mautic

Self-hosted marketing automation: contacts, segments, campaigns, and email, with an official REST API.

- Listing: apps/mautic--mautic.html
- JSON: apps/mautic--mautic.json
- License: GPL-3.0
- Agent interface: API, from the builder
- Reach: 9 of 10 jobs
- Last activity: 2026-09-03
- Effort: config-only
- Use it when: I want HubSpot-style drips and segments on my own server, with contacts I own
- Use it when: I need my agent to add leads, tag them into segments, and trigger campaigns over an API
- Gotcha: GPL-3.0 (GitHub shows NOASSERTION; composer.json says GPL-3.0)
- Gotcha: The REST API is disabled by default and must be switched on in Configuration > API Settings
- Gotcha: Segments, campaigns, and email sends depend on cron jobs; without them nothing moves
- Gotcha: README warns against running from the GitHub source in production; use the mautic.org package or Composer
- Gotcha: Requires PHP and MySQL versions matching the release's supported versions page

## Questions

### Is there an open source alternative to Mailchimp?

Yes. Both listings here are open source: Keila (AGPL-3.0), Mautic (GPL-3.0).

### Which Mailchimp alternatives have an MCP server?

None of these has an MCP server from its builder on record. The recorded interface is API.

### Which Mailchimp alternative can an agent do the most with?

Mautic: 9 of 10 recorded jobs reachable. Jobs differ by listing, so read each list before you choose.