OPEN-SOURCE EMAIL MARKETING

Newsletters, sequences and product email, sent through your own provider

One platform for broadcasts, drip sequences and transactional email. Connect Amazon SES or any SMTP provider, keep your list and your reputation, and pay your provider's rates instead of a bill that grows with your list.

Building a platform? Give every customer its own email marketing.

Open source. Bring your own SES or SMTP.

Pay for the emails you send, not the size of your list

100,000 subscribers emailed weekly is about 400,000 emails, roughly $40 a month on Amazon SES. List-priced newsletter tools charge hundreds for the same sends.

Everything you need to send, nothing you don't

Broadcasts

Write in a visual editor and send newsletters and campaigns to your whole list or a segment.

Sequences

Welcome series, onboarding and drips that run on their own.

Transactional email

Receipts, resets and alerts from one REST API, with the same templates and tracking.

Your own sender

Bring Amazon SES or any SMTP provider. Your reputation and your rates stay yours.

Built for AI agents

An MCP server lets Claude, Cursor and other assistants manage contacts, templates and sends.

Open source

The core is open source and self-hostable, so you're never locked in.

Embed email in your platform

Course, community and creator platforms can give every customer their own email marketing. Provision teams with one API call, set per-team sending quotas, and drop SendLit's React editor and blocks into your app.