Cal.com vs Obsidian — Pricing, Plans, and Verified Costs (2026)
Cal.com starts at $15/mo. Obsidian starts at $5/mo. Obsidian is $10/mo cheaper on the entry tier than Cal.com.
Open-source scheduling platform positioned as the alternative to Calendly for teams that want self-hosting, white-label options, or embedded scheduling in their own product. Distinctive for API-first design that lets developers embed scheduling anywhere. YC-backed (W22). Priced free (open source) up to $75/user/mo Enterprise. Popular with developer tools, healthcare apps, and enterprises with data residency requirements Calendly can't meet.
Local-first knowledge management tool positioned as the alternative to Notion and Roam for people who don't want their notes trapped in a SaaS database. Distinctive for storing everything as plaintext markdown files on your own disk (no vendor lock-in) plus a massive community plugin ecosystem. Personal use is free forever; Sync ($4/mo) and Publish ($8/mo) are optional add-ons. Popular with researchers, writers, and privacy-conscious knowledge workers.
All plans compared
| Tier role | Plan | Cal.com monthly | Cal.com annual | Obsidian monthly | Obsidian annual |
|---|---|---|---|---|---|
| Free / starter | Free / App | Free | Free | Free | Free |
| Entry paid | Organizations / Sync | $37 | $28 | $5 | $4 |
| Pro / power | — / Publish | — | — | $10 | $8 |
| Teams | Teams / — | $15 | $12 | — | — |
| Enterprise | Enterprise / — | Custom | Custom | — | — |
Tier names differ across vendors. Rows are aligned by tier role, not name. Full tier structures on each tool's page.
What each is best for
Cal.com is worth it if… com is the open-source Calendly alternative for developers, agencies, and teams that want scheduling under their own domain with unlimited customization. Free covers solo users; Teams adds routing forms and workflows.
Obsidian is worth it if… solo knowledge workers (researchers, writers, developers, PMs) who want offline-first, local-file, plain-Markdown note-taking with a huge plugin ecosystem — particularly if you value data ownership over collaboration. Free forever for personal use; Sync (paid) adds cross-device encrypted sync; Publish adds one-click static site publishing.
Bottom line: Choose based on how you want to pay — Cal.com is per seat, Obsidian is freemium.
Choose Cal.com over Obsidian if…
Choose Cal.com if…
- You want fixed-price predictability (per seat, from $15/mo).
- You match the profile Cal.com is built for: Cal.
- You're building for healthcare.
Choose Obsidian if…
- You want fixed-price predictability (freemium, from $5/mo).
- You match the profile Obsidian is built for: solo knowledge workers (researchers, writers, developers, PMs) who want offline-first, local-file, plain-Markdown note-taking with a huge plugin ecosystem — particularly if you value data ownership over collaboration.
- You need a general-purpose productivity option rather than a vertical-specific one.
At a glance
| Cal.com | Obsidian | |
|---|---|---|
| Free plan | Yes | Yes |
| Entry price | $15/mo | $5/mo |
| Enterprise available | Yes | No |
| Pricing model | Per Seat | Freemium |
| Last verified | September 19, 2026 | September 11, 2026 |
| Full pricing | View full pricing | View full pricing |
Pricing last verified September 19, 2026. Tracked daily.
Frequently asked questions
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Common questions about Cal.com and Obsidian
- How much does Cal.com cost in 2026?
- Does Cal.com have a free plan?
- How often does Cal.com change prices?
- What are the best Cal.com alternatives in 2026?
- How much does Obsidian cost in 2026?
- Does Obsidian have a free plan?
- How often does Obsidian change prices?
- What are the best Obsidian alternatives in 2026?