Side-by-side open source comparison

Cal.comOpen Source

Open source scheduling infrastructure — the Calendly alternative for individuals and teams

Open source project management software with Gantt charts, agile boards, and time tracking

Overview

Cal.comOpenProject

TypeOpen SourceOpen Source

CategoryProject ManagementProject Management

PricingFree (self-hosted)Free (self-hosted)

Self-Hostable

LicenseAGPL-3.0GPL-3.0

GitHub Metrics

Cal.comOpenProject

Stars41.5k14.9k

Forks12.9k3.2k

Contributors438285

Open Issues1.3k213

Last CommitApr 2026Apr 2026

Latest Release----

Cal.comOpenProject

Health Score

93Excellent

80Excellent

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