Open-source alternatives to Calendly
Calendly shares your availability and books meetings into your calendar. The list below is every catalog tool tagged Booking and Scheduling, which is the closest the catalog gets to the same job; none of them has been checked feature by feature against Calendly.
| Tool | Stars |
|---|---|
Online appointment scheduling system. MIT · released 2026-03-01 | 48,264 |
Customizable and intuitive web-based hotel reservation system and a booking engine. OSL-3.0 · released 2025-07-04 | 14,340 |
Create polls to vote on dates and times (alternative to Doodle). AGPL-3.0 · released 2026-09-03 | 5,248 |
Allows your customers to book appointments with you via the web. GPL-3.0 · released 2026-09-07 | 4,359 |
Event management and ticketing platform for conferences, concerts, and more. Offering customizable event pages and embeddable ticket widgets. AGPL-3.0 · released 2026-08-27 | 4,014 |
Ticket reservation system. GPL-3.0 · released 2026-06-02 | 1,608 |
Resource scheduling solution offering a flexible, mobile-friendly, and extensible interface for organizations to manage resource reservations. GPL-3.0 · released 2026-08-03 | 803 |
Presentation and assembly system for managing and projecting agenda, motions and elections of an assembly. MIT · released 2026-08-24 | 640 |
Webbased app to book seats, desks and rooms for offices. GPL-3.0 · released 2026-09-07 | 313 |
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