Cal.diy
Booking and Scheduling
Online appointment scheduling system.
Actively maintained
Real momentum
MIT
Allows your customers to book appointments with you via the web.
Easy!Appointments is an open-source booking and scheduling project, with 4.3k GitHub stars and a health score of 65/100. It committed 172 times in the last twelve months across 8 of those months, and its status is actively maintained. Licence: GPL-3.0. It has real momentum, so treat it as a live competitor rather than a stale repository.
| Status | Actively maintained — Committed within the last 45 days. |
|---|---|
| Last commit | 2026-07-29 |
| Days since last commit | 19 |
| Commits, last 3 months | 6 |
| Commits, last 12 months | 172 |
| Months with activity | 8 of 12 |
| Last release | 2026-05-27 |
| Archived | No |
| Licence | GPL-3.0 |
| Category | Booking and Scheduling |
Health score combines commit recency, twelve-month commit volume, months with activity, release recency and archive state. Metadata refreshed August 2026.
Copyleft (GPL, AGPL, MPL): derivative work must stay open. AGPL also covers software offered over a network, which blocks most closed SaaS wrappers.
This matters most when you plan to sell a hosted version. A permissive licence means anyone — including a competitor with more capital — can do the same, so your defensibility has to come from distribution, support or data, not from the code.
Easy!Appointments is shipping code consistently, so a buyer comparing your product will find a maintained free option. Price and position against the total cost of self-hosting it, not against the paid incumbent's list price.
Winnable, but differentiation is not optional. Pick one underserved segment and be visibly better for it rather than competing feature-for-feature with a free tool.
Actively maintained. Easy!Appointments recorded 172 commits over the last twelve months, with activity in 8 of those months and 6 commits in the last quarter. Last commit: 2026-07-29. Last release: 2026-05-27. Committed within the last 45 days.
Easy!Appointments is published under GPL-3.0. Copyleft (GPL, AGPL, MPL): derivative work must stay open. AGPL also covers software offered over a network, which blocks most closed SaaS wrappers.
8 open-source implementations, 7 of them actively maintained, led by Cal.diy at 48k stars. Saturation score 47/100 — Contested. Several maintained alternatives exist, but no one owns the category.
Booking and Scheduling
Online appointment scheduling system.
Booking and Scheduling
Customizable and intuitive web-based hotel reservation system and a booking engine.
Booking and Scheduling
Create polls to vote on dates and times (alternative to Doodle).
Booking and Scheduling
Event management and ticketing platform for conferences, concerts, and more. Offering customizable event pages and embeddable ticket widgets.
Booking and Scheduling
Ticket reservation system.
Booking and Scheduling
Resource scheduling solution offering a flexible, mobile-friendly, and extensible interface for organizations to manage resource reservations.
IdeaProof scores your idea against live competitors, market size and 1,000+ documented startup failures in about two minutes.