Keila replaces 25 paid apps
One open-source tool, 25 subscriptions it can stand in for. Each pairing below is curated and verified by hand, with the honest catch spelled out. No votes, no pay-to-list.
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Customer.io alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Mara alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all beehiiv alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Loops alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Drip alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Kit alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Flodesk alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Mailchimp alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Sendcore alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all ActiveCampaign alternatives →
A friendly campaign editor, forms and tracking without contact pricing; delivery is your SMTP provider's job.
the catchKeila gives you a friendly campaign editor and tracking, but delivery reputation, SMTP configuration, backups, and upgrades become your responsibility rather than Campaign Monitor's.
the verdict →all Campaign Monitor alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all MailerLite alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Omnisend alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Brevo alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Buttondown alternatives →
A self-hosted list, forms and campaigns without contact caps; you supply deliverability.
the catchKeila removes contact pricing, but you must supply the server, SMTP provider, deliverability monitoring, backups, and updates that EmailOctopus manages.
the verdict →all EmailOctopus alternatives →
Self-hosted newsletters and signup forms with a real visual editor; SMTP setup replaces onboarding calls.
the catchKeila replaces newsletters and signup forms, but SMTP authentication, deliverability, server maintenance, backups, and upgrades replace Constant Contact's guided hosted setup.
the verdict →all Constant Contact alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Audienceful alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Bento alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all FeedBlitz alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Klaviyo alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Letterdrop alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Mailcoach Cloud alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all SendFox alternatives →
Lean newsletter tool in Elixir — campaigns, segments, signup forms. Bring your own SES/SMTP and sending is nearly free.
the verdict →all Substack alternatives →last updated 2026-08-29 · up to $6,264/yr replaced · no votes, no pay-to-list