Legit.Show measured Viaduct's Security frame at 25/100. No Content-Security-Policy and no HSTS. Served over HTTPS with a valid certificate.

How does Legit.Show measure Viaduct?

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.

MCP & Integrations

Viaduct

Last updated 2026-09-11 · benchmark measured 2026-09-11 — deterministic & reproducible

C4 architecture modelling tool with an MCP server for AI coding agents.

78/100

7/7 frames

Top 51% of 14,148 measured · #5 of 9 in architecture diagram tool

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 2026-09-11 · scores move as sites change

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To cite this score: legit.show/s/c4-quietgridlabs-com/2026-09-11. That address never changes; this page moves with every re-measure.

Legit.Show scored Viaduct 78/100 on 2026-09-11, measured across all 7 frames from its public surface. legit.show/s/c4-quietgridlabs-com/2026-09-11

Is Viaduct production-ready?

Legit.Show scores Viaduct 78 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Viaduct (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 — 93/100
Security — 25/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 100/100
How this compares across the catalogue: The Privacy Gap
Reliability — 75/100
Standards — 100/100
Discoverability — 100/100

What we measured

No Content-Security-Policy and no HSTS.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 1013 ms to first byte.
3 of 3 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 it's for

Engineering teams · Backend engineers · SREs · Tech leads · Platform engineers

Pricing

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Sources and updates

Description: Taken from c4.quietgridlabs.com's own website on 2026-09-11.
Operator: Quiet Grid Labs co., as named in c4.quietgridlabs.com'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 2026-09-11.

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

Visit Viaduct → · Alternatives to Viaduct → · How this was measured →