Best Open Source Scheduling Tools in 2026

Calendly Teams costs $16/user/month. Here are the best open source scheduling alternatives for booking pages, team scheduling, and appointment management.

Quick Comparison

Tool	Best For	License	Stars	Self-Host
Cal.com	Full Calendly replacement	AGPL-3.0	33K+	Docker
Rallly	Group polls (Doodle alt)	AGPL-3.0	3.5K+	Docker
Easy!Appointments	Service businesses	GPL-3.0	3K+	PHP
Schej	When2meet alternative	MIT	1K+	Docker

Detailed Breakdown

Cal.com — Best Overall

Replaces: Calendly, SavvyCal, TidyCal

Event types with custom durations
Round robin and collective scheduling
Managed event types (team admin control)
Google, Outlook, Apple calendar sync
Zoom, Google Meet, Teams auto-creation
Workflow automations (pre/post meeting)
Embeddable booking widget
Payments (Stripe integration)
Routing forms
Multi-timezone support
API and webhooks

Best for: Any team that needs scheduling. The most complete Calendly replacement.

Rallly — Best for Group Polls

Replaces: Doodle

Create polls to find the best meeting time
Participants vote on available slots
No account needed for participants
Time zone support
Clean, simple interface

Best for: Finding meeting times across groups. Perfect Doodle replacement.

Easy!Appointments — Best for Service Businesses

Replaces: Acuity Scheduling, Square Appointments

Multiple services and providers
Customer booking page
Google Calendar sync
Email notifications
Working hours management
Service categories

Best for: Salons, clinics, consultants — businesses that book appointments for services.

Choosing the Right Tool

Need	Choose
Full Calendly replacement	Cal.com
Group scheduling polls	Rallly
Service appointment booking	Easy!Appointments
When2meet alternative	Schej
Team round-robin	Cal.com

Cost Savings

Team Size	Calendly Teams	Self-Hosted Cal.com	Annual Savings
5 users	$960/year	$54/year (VPS)	$906
20 users	$3,840/year	$96/year (VPS)	$3,744

Compare all scheduling tools on OSSAlt — features, integrations, and pricing side by side.