Keila vs Mail-in-a-Box
| Tagline | Open-source newsletter tool, an easy Mailchimp alternative in Elixir | Turn any Ubuntu VPS into a complete, self-hosted mail server in one command |
| Category | Email & Newsletters | Email & Newsletters |
| Replaces | Mailchimp, ConvertKit (Kit) | Gmail / Google Workspace, Mailchimp, SendGrid |
| GitHub stars | 2.2k | 15k |
| Language | Elixir | Shell |
| License | AGPL-3.0 | CC0-1.0 |
| Self-host difficulty | 3/5 Moderate | 2/5 Easy |
| Deploy options | One-Click Docker Docker Compose Manual | Manual |
| Managed hosting | ||
| Last updated | 8 days ago | 2 months ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
Keila
- Smaller feature set than Mailchimp — limited automation/journeys
- Fewer template and design tools out of the box
- Smaller community and ecosystem of integrations
- No built-in deliverability/IP warmup; relies on external senders
Mail-in-a-Box
- Requires a dedicated Ubuntu VPS with a clean IP reputation; shared hosting is not supported
- No built-in bulk mailing or newsletter campaign tools
- Limited horizontal scalability; single-server architecture only
- Webmail (Roundcube) is functional but far less polished than Gmail's UI
Bottom line
Choose Mail-in-a-Box if you want the lower-effort setup; choose Mail-in-a-Box for the larger community and ecosystem. Keila has seen more recent development. Open each guide below for deploy steps and the full feature gap.
Mail-in-a-Box
Turn any Ubuntu VPS into a complete, self-hosted mail server in one command