Looking for a free or open-source alternative to Mailchimp? Postbird is the closest direct swap — MIT-licensed source on GitHub, or a $59 one-time packaged install. Since you're already auditing what you pay Mailchimp every month, here are four more pay-once tools from the same catalog worth a look while you're at it — different jobs, same idea: buy the software once instead of renting it forever.
1. Postbird — replaces Mailchimp
Lists, segments, a drag-block builder, throttled sending & open/click tracking — no per-contact pricing. $59 once vs Mailchimp's $20+/mo (grows with your list). Free on GitHub, or the packaged installer on Whop.
See Postbird → · Source on GitHub
2. Castport — Upload episodes, get a valid RSS feed, public pages, embeddable player & download stats. Pay once.
Replaces Transistor ($19/mo). $39 once. See Castport →
3. Inkpress — Split-pane markdown editor, 3 themes, server-side highlighting, RSS & SEO — one SQLite file.
Replaces Ghost ($9/mo). $29 once. See Inkpress →
4. Feedloft — Self-hosted Feedly alternative — folders, OPML, full-text search, one SQLite file.
Replaces Feedly ($8/mo). $24 once. See Feedloft →
5. Reelsnag — Paste a URL, pick a quality, queue it. Trim, MP3, subtitles, batch — all local.
Replaces Downloader subscription sites ($10–15/mo). $24 once. See Reelsnag →
Why this list is worth bookmarking
Every app above is a one-time purchase with MIT-licensed source, no accounts with us and no telemetry. None of them are trying to be the next Mailchimp — they're trying to be the last subscription you pay for that specific job.
Try Postbird — $59, once
Lists, segments, a drag-block builder, throttled sending & open/click tracking — no per-contact pricing.