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Cal.comRun Projects & Operations

STOA rating

7.1 / 10

Openness

OPENNESS 4/10API 2/3 · Export 0/3 · Contract 0/2 · Integrations 2/2

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Cal.com documents a public API with keys you manage in account settings, and the docs do not state which plans include it. cal.com, checked 8 Oct 2026 (opens in a new tab)

Connections

Zapier lists a Cal.com integration with triggers for new, cancelled and rescheduled bookings. zapier.com, checked 8 Oct 2026 (opens in a new tab)

Cal.com runs its own app store for connecting calendar, video, CRM and payment apps. cal.com, checked 8 Oct 2026 (opens in a new tab)

What it does

Cal.com is an open-source scheduling platform that lets people book time with you without back-and-forth emails. You set your availability, share a booking link, and clients pick a time. It connects to your calendar and video tools so everything stays in sync. The free plan is generous for individuals — unlimited event types, calendars, and integrations. Teams plan at $12/user/month adds round-robin scheduling and analytics. Cal.com is open-source and self-hostable. Two-way sync with Salesforce and HubSpot included free. Supports 65+ languages.

Strengths

Generous free plan with unlimited event types, calendars, and integrations
Open-source — inspect the code, self-host, and avoid vendor lock-in
Built-in payment collection through Stripe and PayPal
Supports 65+ languages for international businesses
Teams plan at $12/user/month undercuts Calendly

Weaknesses

Self-hosting requires technical knowledge
AI phone agent (Cal.ai) still early-stage
Free plan limited to one user — need $12/month Teams to add colleagues
Fewer pre-built templates than Calendly
Interface can feel less intuitive for first-time users

Key features

Create custom booking links and embed scheduling directly on your website
Sync with Google Calendar, Outlook, Zoom, Teams, and 100+ apps
Accept payments through Stripe or PayPal right when someone books
Two-way sync with Salesforce and HubSpot keeps your CRM updated
Open-source and self-hostable for full data control

AI features

Cal.com offers Cal.ai, an AI-powered phone agent that answers calls, checks your availability, and books meetings for you. The feature is still early-stage.

STOA verdict

Cal.com is one of the best scheduling tools for small businesses that want flexibility without overpaying. The free plan is truly useful for solo operators, and the $12/month Teams plan undercuts Calendly with comparable features. If you value open-source principles or need to embed scheduling into your product, Cal.com is the clear winner.