Cal.com vs Appwrite
Open-source scheduling infrastructure — the self-hostable Calendly alternative
vs. Open-source BaaS for building full-stack apps
Pricing tiers
Cal.com
Free (Cloud)
$0. 1 user. Unlimited event types. Unlimited meetings. Cal branding.
Free
Self-Hosted (OSS)
Free forever. AGPL-3.0. Docker/K8s deploy. Full feature parity with cloud.
$0 base (usage-based)
Teams
$12/user/mo. Round-robin, collective events, routing forms, Cal Video, Workflows.
$12/mo
Organizations
$37/user/mo. SSO, advanced routing, dashboards, analytics, dedicated support.
$37/mo
Enterprise
Custom. SAML, HIPAA, dedicated deployments, security reviews.
Custom
Appwrite
Self-Hosted
Run Appwrite on your own infrastructure. MIT licensed — no usage limits.
$0 base (usage-based)
Cloud Free
Managed cloud. Hard caps: 1 team member, 1 database per project.
Free
Cloud Pro
From $15/member/month. 2 TB bandwidth, 150 GB storage, 200k MAU, 3.5M executions, unlimited databases + team members.
$15/mo
Cloud Scale
$599/month flat for the org. Higher included usage + advanced security. Deprecated in some regions — check.
$599/mo
Enterprise
Custom pricing. SOC 2, HIPAA (on request), dedicated infra, SLAs.
Custom
Free-tier quotas head-to-head
Comparing free on Cal.com vs free on Appwrite.
| Metric | Cal.com | Appwrite |
|---|---|---|
| bandwidth gb month | — | 5 GB/month |
| databases per project | — | 1 databases |
| function duration s | — | 30 seconds |
| function executions | — | 750000 exec/month |
| mau | — | 75000 users/month |
| storage gb | — | 2 GB |
| team members | — | 1 members |
Features
Cal.com · 16 features
- Availability — Multiple schedules per user.
- Buffer Time — Padding between meetings.
- Cal Video — Built-in video conferencing.
- Embed — Inline/popup/floating-button embeds.
- Event Types — One-on-one, group, collective, round-robin.
- Insights Dashboard — Booking trends + team analytics.
- Paid Bookings — Stripe integration for paid appointments.
- Platform API — Embed scheduling in your SaaS.
- Recurring Events — Weekly/monthly recurring bookings.
- Round-Robin — Distribute bookings across team.
- Routing Forms — Route leads by answers.
- Self-Host — Deploy to your infra.
- SSO — SAML + OIDC.
- Timezone Detection — Auto-detect viewer timezone.
- Webhooks — Outbound events.
- Workflows — Automated email/SMS reminders.
Appwrite · 13 features
- Account (Auth) — User authentication: email/password, magic URLs, phone OTP, anonymous, 30+ OAuth…
- Avatars — Generated avatars, country flags, credit-card icons, QR codes, favicons.
- Databases — NoSQL collections with attribute types, indexes, permissions per document/collec…
- Events System — Unified event bus: subscribe in Functions, Webhooks, Realtime using event string…
- Functions — Serverless functions in 13+ runtimes (Node, Python, Go, Ruby, PHP, Dart, Deno, S…
- Messaging — Multi-channel messaging: Push (FCM/APNs), SMS (Twilio/Vonage/Msg91), Email (Mail…
- Migrations — Import from Firebase, Supabase, NHost, or another Appwrite project.
- Permissions (ACLs) — Per-document / per-collection ACLs: Role.user(), Role.team(), Role.any(), Role.g…
- Realtime — WebSocket subscriptions to events: database changes, auth, storage, function exe…
- Sites — Deploy static and SSR frameworks (Next, Nuxt, SvelteKit, Astro, Remix) direct fr…
- Storage — File buckets with access control, auto-transforms (image preview), antivirus, en…
- Teams — Group users with shared access + roles. Used for row-level permissions on resour…
- Webhooks — HTTP callbacks on any Appwrite event. Signed with x-appwrite-webhook-signature.
Developer interfaces
| Kind | Cal.com | Appwrite |
|---|---|---|
| CLI | cal CLI (self-host) | Appwrite CLI |
| SDK | @calcom/embed-react | Android SDK (Kotlin), Apple SDK (Swift), Dart Server SDK, Deno SDK, Flutter SDK, Kotlin Server SDK, .NET Server SDK, Node.js Server SDK, PHP Server SDK, Python Server SDK, React Native SDK, Ruby Server SDK, Swift Server SDK, Web SDK (browser) |
| REST | Cal.com REST API v2, Platform API (embed in SaaS) | REST API |
| GRAPHQL | — | GraphQL API |
| MCP | — | Appwrite MCP Server |
| OTHER | Cal.com Dashboard, Cal.com Webhooks | Realtime WebSocket |
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