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Open-source alternatives to Square Appointments

Compare community-driven replacements for Square Appointments in appointment scheduling & booking platforms workflows. We curate active, self-hostable options with transparent licensing so you can evaluate the right fit quickly.

Square Appointments logo

Square Appointments

Square Appointments provides a free plan with a booking site, integrated payments, and staff management—scaling with Plus and Premium tiers.Read more
Appointment Scheduling & Booking Platforms
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Key stats

  • 4Alternatives
  • 3Support self-hosting

    Run on infrastructure you control

  • 4Active development

    Recent commits in the last 6 months

Counts reflect projects currently indexed as alternatives to Square Appointments.

All open-source alternatives

Easy!Appointments logo

Easy!Appointments

Self-hosted appointment scheduler with Google Calendar sync

Self-host friendlyActive developmentPrivacy-firstPHP

Why teams choose it

  • Two-way Google Calendar synchronization for seamless schedule management
  • Customizable working plans and booking rules for complex workflows
  • Self-hosted deployment with full data ownership and control

Watch for

Requires server administration knowledge for installation and maintenance

Migration highlight

Medical Practice Scheduling

Patients book appointments online while doctors sync schedules with Google Calendar and receive automated reminders, reducing no-shows and administrative overhead.

Cal.com logo

Cal.com

Open-source scheduling infrastructure you control and customize

Self-host friendlyActive developmentPrivacy-firstTypeScript

Why teams choose it

  • Self-hosted or cloud: deploy on your domain or use managed hosting
  • White-label by design: full control over branding and appearance
  • API-driven architecture: integrate scheduling into any workflow

Watch for

Self-hosting requires Node.js, PostgreSQL, and DevOps expertise

Migration highlight

SaaS product embedded booking

Integrate native scheduling into your application without redirecting users to third-party tools

Rallly logo

Rallly

Open-source scheduling tool for effortless group meeting coordination

Self-host friendlyActive developmentPrivacy-firstTypeScript

Why teams choose it

  • Meeting polls that aggregate participant availability to find optimal times
  • Self-hosting support with comprehensive documentation for full data control
  • Built on Next.js, Prisma, tRPC, and PostgreSQL for type-safe reliability

Watch for

AGPL-3.0 license requires source disclosure for modified hosted versions

Migration highlight

Team Sprint Planning

Coordinate recurring sprint planning sessions across distributed teams by polling availability and locking in times that maximize attendance.

Atom logo

Atom

Your AI-powered personal and business assistant in one place

Active developmentPrivacy-firstIntegration-friendlyPython

Why teams choose it

  • Unified calendar and smart scheduling across personal and work accounts
  • Cross‑platform communication hub with AI‑prioritized inbox
  • Voice‑driven task and project automation with extensive integrations

Watch for

Requires Node.js environment and sufficient hardware resources

Migration highlight

Cross‑calendar meeting scheduling

Atom finds a mutually available 30‑minute slot across personal and work calendars and sends invites automatically.

Choosing a appointment scheduling & booking platforms alternative

Teams replacing Square Appointments in appointment scheduling & booking platforms workflows typically weigh self-hosting needs, integration coverage, and licensing obligations.

  • 3 projects let you self-host and keep customer data on infrastructure you control.
  • 4 options are actively maintained with recent commits.

Tip: shortlist one hosted and one self-hosted option so stakeholders can compare trade-offs before migrating away from Square Appointments.