Best for a self-hosted booking system for a business
License: Open source
Web
Self-hosted
Status: Unknown
Mature PHP app you host yourself; free for personal and commercial use. Built around staff, services and customers rather than personal links. Free version: The software is free for personal and commercial use. Managed hosting and custom development are paid services.
Situational
1 tool
Right for specific needs, or not yet mature enough to recommend widely.
Public MIT repository left after Cal.com closed its production code. Cal.com advises it for personal, non-production use only. No hosted version, and no teams or SSO.
Sponsor this page: $149 for 30 days. Sponsors appear above the ranking, labeled; the ranking itself is not for sale.
Feature parity
How each alternative covers what people use Calendly for. Numbers link to editor notes.
Easy!Appointments, Multiple event types and booking links: Services and providers with working plans instead of event types
Easy!Appointments, Multiple calendar connections: Google Calendar synchronization
Cal.diy, Multiple calendar connections: Google, Outlook, Apple and CalDAV calendars
Easy!Appointments, Automated reminders and follow-ups: Email notifications
Cal.diy, Automated reminders and follow-ups: Booking emails only; the Workflows feature was removed
Easy!Appointments, Payments at booking: No payment feature in the core app
Cal.diy, Payments at booking: Stripe and PayPal apps ship with the code; you set them up yourself
Easy!Appointments, CRM and email marketing integrations: No CRM integrations in the core app
Cal.diy, CRM and email marketing integrations: HubSpot and Salesforce apps are included
Easy!Appointments, Website embeds: Booking page can be added to an existing website
Cal.diy, Website embeds: Inline and popup embeds
Not covered by any free alternative yet: Automated reminders and follow-ups, Payments at booking, CRM and email marketing integrations. See all feature gaps
What switching saves
Switching saves about $120 USD / ≈$171 CAD (estimated from the USD price) a year.Prices checked ; ≈ means converted from USD.
Based on Standard plan, per seat. Price source. USD to CAD at 1.4257 as of Oct 7, 2026.
About this page
Last verified . Ranking: tier first, then the published score.