Lewsnetter is a newsletter platform where every action a human can take, an AI agent can take too. Visual segment builder, MCP-native, ships through your own Amazon SES.
43 tools across campaigns, subscribers, segments, sending. Connect Claude or any MCP-compatible client and your agent can draft, segment, schedule, and send — using the same APIs the UI does. No second integration to build.
Plug your Amazon SES credentials in once via the guided setup wizard. Every campaign ships from your account, your sending reputation, your bill. We never see the outbound mail.
Nested AND/OR groups, type-aware operators, live match count + sample rows as you build. Sync subscribers from your Rails app with the
lewsnetter-rails
gem and segment on anything you push.
The guided setup wizard walks you through AWS SES credentials, sender verification, and a test send — so you know everything works before you ever queue a campaign.
Paste your AWS access keys. We verify them with SES, list your verified identities, and you import one as a sender — one click.
CSV upload, JSON API, or the
lewsnetter-rails
gem for live sync from your app. Subscribers come in with whatever attributes you want to segment on.
MJML templates, Markdown body, Liquid for personalization. Or hand the whole thing to an agent over MCP. Bounce + complaint tracking works automatically.
No tiers, no per-subscriber pricing, no surprise overages. One flat fee per team.
Cancel anytime.
lewsnetter-rails gemYou operate it.
The whole app — campaigns, subscribers, segments, MCP, API — is free until you connect Amazon SES. The $10/mo unlocks sending.
MIT-licensed. Rails 8 + SQLite + Litestream + Kamal. One-box deploy. Use the hosted version if you don't want to operate it; clone the repo if you do.
Sign up, connect SES, send yourself a test — about 5 minutes. Then queue something real.
Start free