Legit.Show measured Upstream's Security frame at 55/100. Security headers present: HSTS, X-Content-Type-Options. Served over HTTPS with a valid certificate.

How does Legit.Show measure Upstream?

Legit.Show scores seven frames — Performance, Accessibility, Security, Privacy, Reliability, Standards and Discoverability — deterministically from the public surface (URL, HTTP headers, real Lighthouse), with no LLM in the scoring path. See legit.show/methodology.

Productivity

Upstream

Last updated 2026-06-24 · benchmark measured 2026-09-20 — deterministic & reproducible

AI-assisted email inbox that organizes messages and drafts replies in your voice.

65/100

7/7 frames

Top 84% of 14,138 measured · #30 of 31 in email client

Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.

Checked 2026-09-20 · scores move as sites change

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To cite this score: legit.show/s/upstream-do/2026-09-20. That address never changes; this page moves with every re-measure.

Legit.Show scored Upstream 65/100 on 2026-09-20, measured across all 7 frames from its public surface. legit.show/s/upstream-do/2026-09-20

Is Upstream production-ready?

Legit.Show scores Upstream 65 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Upstream (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 44/100
Accessibility — 90/100
Security — 55/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 0/100
How this compares across the catalogue: The Privacy Gap
Reliability — 92/100
Standards — 89/100
Discoverability — 85/100

What we measured

Security headers present: HSTS, X-Content-Type-Options.
No Content-Security-Policy.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 233 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 built it

Pablo

Who it's for

Professionals · Teams · Email users · Remote workers

Pricing

Free forever

Sources and updates

Description: Taken from upstream.do's own website on 2026-06-24.
Operator: Upstream Labs, Inc., as named in upstream.do's terms, privacy page or footer.
Benchmark: Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-20.

Put together from public information, without Upstream's involvement. If anything here is wrong, tell us and a person will check it.

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