easyappointments.org
Self-hosted appointment booking
Open-source web app that lets customers book appointments with you, with services, providers, working plans and Google Calendar sync.
Free alternative to Calendly
| Resource | Pricing | Type | Licence | Platforms | Popularity | Last commit | Link |
|---|---|---|---|---|---|---|---|
| Easy!Appointments | Open source | Tool | GPL-3.0 | web | ★ 4.4k | 1 Oct 2026 | ✓ |
| Cal.diy | Open source | Tool | MIT | web | ★ 49k | 26 Sept 2026 | ✓ |
| listmonk | Open source | Tool | AGPL-3.0 | self-hosted | ★ 24k | 4 Oct 2026 | ✓ |
| NocoBase | Open source | Tool | — | web | ★ 24k | 30 Sept 2026 | ✓ |
| Automatisch | Open source | Tool | — | self-hosted | ★ 14k | 11 Feb 2026 | ✓ |
| Isso | Open source | Tool | MIT | self-hosted | ★ 5.3k | 15 Sept 2026 | ✓ |
| Remark42 | Open source | Tool | MIT | self-hosted | ★ 5.6k | 1 Oct 2026 | ✓ |
The self-hosted community edition of Cal.com
Self-hosted newsletters and mailing lists
Open-source no-code for internal tools
An open-source Zapier alternative
A small self-hosted comment server
Comments that don't track readers
