Cal.com Due Diligence
Run due diligence on Cal.com: check compliance and get alerts when suppliers change.
United States · cal.com · 20 vendors
Cal.com is an open-source and cloud-based scheduling platform that provides infrastructure for managing appointments, meetings, and bookings efficiently. It offers customizable booking workflows, calendar integrations, and API tools for individuals, teams, and businesses. The company aims to connect a billion people by 2031 through calendar scheduling.
Resilience scores
- Digital Sovereignty: 95
- Digital Resilience: 8
- Financial Resilience: 6
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Services catalogue
2 services in catalogue across 2 categories; runs on 20 sub-vendors.
- Cal.com
- Hermes360
Insights
Last updated 2026-05-23 · revision 8
20 direct vendors, 217 subvendors
Direct vendors by controlling owner country (sample)
- United States: 19
- Netherlands: 1
Subvendors by controlling owner country (sample)
- Australia: 3
- Unknown: 1
- UK: 1
Compliance
5 in-scope frameworks identified; showing 3.
SOC 2 (source) — Evidence found
Evidence: https://cal.com/security
ISO 27001 (source) — Evidence found
Evidence: https://cal.com/security
ISAE 3000 (source) — No public evidence
Evidence: https://cal.com/security
Financials
Three-year financials
- 2024:
- 2023: equity $25M
- 2022: revenue $1M, equity $7.4M
Financial Resilience Score: 6/10
Cal.com is a privately held, VC-backed open-source SaaS company with approximately $32M+ in cumulative equity funding from top-tier investors including Sequoia Capital, OSS Capital, a16z, and Bain Capital Ventures. The strong investor base provides credibility and runway, and the company benefits from a capital-light, fully remote operating model and a large open-source community (30,000+ GitHub stars) that lowers customer acquisition costs. Product diversification across self-serve SaaS, Teams/Organizations, Enterprise, Platform/Atoms developer SDK, and the new Cal.ai voice agent provides multiple monetization vectors. However, the company has not publicly disclosed audited financials, revenue, EBIT, or equity in numeric form, limiting visibility into actual financial health. Like most early-stage VC-backed SaaS, Cal.com is almost certainly unprofitable and burning cash. It competes directly against Calendly (~$200M+ ARR) plus large incumbents like Microsoft Bookings, Google Appointments, and HubSpot Meetings. Structural dependencies on Google/Microsoft calendar APIs and the open-core tension between free self-hosting and paywalled features add risk. The mid-range score reflects strong backing balanced against unprofitability, competitive pressure, and limited financial transparency.
Key strengths: Strong VC backing (~$32M+ raised) from Sequoia, OSS Capital, a16z, Bain Capital Ventures, Large open-source community with 30,000+ GitHub stars driving organic growth, Diversified product surface: SaaS, Enterprise, Platform/Atoms SDK, Cal.ai, Capital-light fully remote operating model with no physical offices, Strong brand momentum and public transparency via Open Startup page
Risk factors: Entrenched competition from Calendly (~$200M+ ARR) and incumbents (Microsoft, Google, HubSpot), Likely unprofitable with ongoing monthly burn typical of VC-backed SaaS, Structural dependence on Google and Microsoft calendar APIs, Open-core tension between free self-hosting and paywalled enterprise features, No audited financials limiting creditor/partner due-diligence, Key-person concentration in two highly public founders
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