Productivity
Cairn
Last updated 2026-07-30 · benchmark checked 2026-08-09 · unchanged since 2026-08-08 — deterministic & reproducible
Cairn is a browser-based diagram builder that requires no account or cloud storage.
Is Cairn production-ready?
Legit.Show scores Cairn 74 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Cairn (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Standards; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 98/100
- Accessibility — 88/100
- Security — 45/100
- Privacy — 25/100
- Reliability — 92/100
- Standards — 100/100
- Discoverability — 70/100
What we measured
- Security headers present: HSTS.
- No Content-Security-Policy.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 168 ms to first byte.
- Returns a proper 404 for unknown routes.
- 0 of 0 sampled routes reachable.
- No privacy policy found.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
Diagram creators · Business analysts · Process documentation teams · Non-technical users · Enterprise teams
Pricing
Free Basic edition; Pro €9/month or €90/year (save 17%)
Visit Cairn → · Alternatives to Cairn → · How this was measured →