Productivity
Skim
Last updated 2026-07-21 · benchmark measured 2026-08-12 — deterministic & reproducible
Skim is a free, open-source AI email client for Windows built on a native Rust core.
Is Skim production-ready?
Legit.Show scores Skim 80 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Skim (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Privacy; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 54/100
- Accessibility — 97/100
- Security — 25/100
- Privacy — 100/100
- Reliability — 92/100
- Standards — 92/100
- Discoverability — 100/100
What we measured
- No Content-Security-Policy and no HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 200 ms to first byte.
- Returns a proper 404 for unknown routes.
- 0 of 0 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: structured data, sitemap, OpenGraph image, canonical URL.
Who built it
justin cesman
Who it's for
Windows users · Email power users · Privacy-conscious professionals · Developers · People seeking lightweight alternatives
Pricing
Free and open source (MIT license); optional AI features use your own API key billed directly by provider
Visit Skim → · Alternatives to Skim → · How this was measured →