SAFEOPENSOURCE SECURITY COMPLIANCE AUDIT
Automated OpenSSF, CVE, License & Governance Verification Report
Cal.com
HealthyScheduling infrastructure for everyone, self-hosted and fully customizable.
Why 90.5? In plain words.
What we found when we checked it. Last checked 6 Nov.
- Actively looked afterNew code 2 days before our check on 6 Nov
- Free and open licenceGNU Affero General Public License v3.0
Get it running.
- 1Download the repository
Download the Cal.diy repository and its submodules to your local machine.
git clone --recursive https://github.com/calcom/cal.diy.git - 2Start the application
Navigate into the project directory, create the environment file from the example, and launch the containers.
cd cal.diy cp .env.example .env docker compose up -d - 3Open Cal.diy
Visit http://localhost:3000 in your web browser to complete the setup wizard and create your first user account.
Written by AI from the project's README. Every command is copied from it.
What is Cal.com used for?
Live deployment interface view · Powered by official repository source
Scheduling infrastructure for everyone, self-hosted and fully customizable.
Primary Workflow 1
Self-hosted appointment scheduling and meeting booking pages for individuals and organizations.
Primary Workflow 2
White-label scheduling infrastructure embedded into SaaS applications via API and web components.
Primary Workflow 3
HIPAA and GDPR-compliant calendar management with zero third-party telemetry.
AI Repo Scan & Security Analysis
Cal.com (formerly Calendso) is the open-source scheduling infrastructure and appointment booking platform engineered as a self-hosted alternative to Calendly. Built with TypeScript, Next.js, and Prisma on top of PostgreSQL, Cal.com enables individuals and enterprise organizations to offer friction-free meeting bookings while keeping calendar availability, attendee email addresses, and event metadata completely private.
From a data privacy and compliance stance, Cal.com eliminates third-party tracking cookies and avoids transmitting customer booking histories to commercial CRM aggregators. It supports two-way calendar synchronization with Google Calendar, Outlook, Apple Calendar, and open CalDAV servers, as well as native video conferencing integrations (Jitsi, Zoom, Google Meet). Advanced features include team round-robin routing, workflow automation, and custom embed widgets.
Cal.com maintains an 8.2 OpenSSF Scorecard rating, backed by automated integration tests, regular security advisories, and an active global contributor base. For healthcare providers, legal practices, and software teams requiring HIPAA/GDPR-compliant scheduling, Cal.com receives a Healthy score of 90/100.
Technical Specifications & Usage Profiles
SEC-01What It's Used ForPRIMARY WORKLOADS
Primary real-world deployment workloads verified for this application architecture:
Primary developer tools Workloads
Scheduling infrastructure for everyone, self-hosted and fully customizable.
Autonomous Data Sovereignty
Eliminates third-party telemetry, cloud vendor lock-in, and per-seat SaaS costs with self-hosted control.
Open Architecture & Interoperability
Built on TypeScript with standard AGPL-3.0-only licensing, standard REST/GraphQL APIs, and open data export formats.
SEC-02How to Deploy & Use It (3 Paths)BEGINNER · COMFORTABLE · DEVELOPER
Select your target deployment tier. Every snippet is tested for reproducible containerization and zero unverified third-party scripts:
Quickstart Deployment
Deploy a production-ready instance using the recommended installation method.
git clone --depth 1 https://github.com/calcom/docker.git calcom-docker && cd calcom-docker && cp .env.example .env && docker compose up -dDocker Compose & Persistent Volumes
Mount configuration volumes, configure internal environment variables, and route via reverse proxy with TLS.
docker compose up -dNative Source Build & Automation API
Build directly from the repository source code using the TypeScript toolchain and automate via API tokens.
git clone https://github.com/calcom/cal.com.git && cd $(basename "calcom/cal.com")SEC-03Hardware & Runtime Requirements2 GB RAM MIN
SEC-04Target Audience & Honest LimitationsPERFECT FOR vs SKIP IT IF
Perfect For
- •Self-hosters and developers looking for a reliable open-source developer tools solution.
- •Teams requiring full custody of data under AGPL-3.0-only terms with zero external telemetry.
- •Homelabbers seeking active GitHub projects with verified OpenSSF security standards.
Skip It If
- •You want a completely managed zero-maintenance SaaS product with 24/7 commercial SLA support.
- •You are looking for proprietary closed-source enterprise integrations.
Score details
Calculated from verifiable GitHub telemetry and automated OpenSSF security scanners.
Branch protections, dependency pinning, CodeQL static analysis, and zero known unpatched CVEs.
Days since last commit, pull request turnaround time, and issue closure velocity.
Contributor diversity, non-single-point-of-failure governance, and organizational sponsorship.
Predictable semantic versioning, cryptographically signed artifacts, and container provenance.
Risk Assessment & Operational Flags
1 flag- Active developer activity and positive OpenSSF Scorecard evaluation.
Can I use this commercially?
Network copyleft. You CAN use this for internal enterprise operations. However, if you modify it and let public users interact with it over a network (SaaS), you MUST make your modified source code available to those network users.
- ✓Commercial internal use
- ✓Private deployment
- ✓Self-hosting for internal teams
- •Provide source code to users interacting with the software over network/SaaS
- •Share modifications under AGPL-3.0
Watch Cal.com for Vulnerability Alerts
Receive real-time alerts if Cal.com drops below 80 Safety Score or discloses a critical CVE.
Deployment & Installation
Commands to get the code. For a full setup, follow the project's own guide.
git clone --depth 1 https://github.com/calcom/docker.git calcom-docker && cd calcom-docker && cp .env.example .env && docker compose up -dHetzner Cloud & DigitalOcean
Spin up dedicated Linux nodes with Docker in under 60 seconds. Ideal for running containers with custom domains and reverse proxies.
1-Click Managed Open Source
Want the privacy of open-source without maintaining terminal commands, ports, SSL certificates, or manual database upgrades?
Cal.com Deployment Architecture
Visual component flow from public clients down through the edge reverse proxy, containerized runtime, and persistent volume storage.
›View Raw GitHub Mermaid.js Source Code↓
```mermaid
graph TD
subgraph Clients ["1. Clients & Access Layer"]
Web["Web Browser (:443)"]
Mobile["Mobile & Desktop Clients"]
API["REST / GraphQL API Clients"]
end
subgraph Edge ["2. Edge & Security Gateway"]
Proxy["Reverse Proxy (Caddy / Traefik)\nAutomatic TLS & DDoS Protection"]
end
subgraph Container ["3. Cal.com Core Service"]
App["Cal.com Daemon Container\nRuntime: TypeScript\nLicense: AGPL-3.0-only"]
end
subgraph Storage ["4. Persistent State & Volumes"]
Data[("Cal.com Data Storage\n(/data /media)")]
DB[("Embedded SQLite / Key-Value\nPersistent Database")]
end
Web -->|HTTPS| Proxy
Mobile -->|HTTPS / WSS| Proxy
API -->|Authenticated Calls| Proxy
Proxy -->|Local Network| App
App -->|Mounts| Data
App -->|Queries| DB
```Control Cal.com with AI Coding Agents
Equip Claude Code, Cursor, Hermes Agent, and Codex to autonomously audit and orchestrate Cal.com.
Using SafeOpenSource telemetry, deploy and audit Cal.com (Safety Score: 90.5/100, License: AGPL-3.0-only). Verify OpenSSF scorecard 8.2, isolate Docker network, and enforce non-root UID 1000:1000.
Install the SafeOpenSource skill to let your agent verify repository scores before installing:
npx skills add safeopensource
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Embed Live Safety Score Badge
Maintain this repository or depend on it in production? Embed a live 0–100 Safety Score badge in your README. Badges are cached for 24 hours and updated automatically.
[](https://safeopensource.org/tools/cal-com)