Is Substructure secure?

Legit.Show measured Substructure'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 Substructure?

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.

AI & Agents

Substructure

Last updated 2026-08-15 · benchmark measured 2026-09-16 — deterministic & reproducible

Substructure is a hosted engine for building and running AI agents in the cloud.

81/100

7/7 frames

Top 40% of 14,148 measured · #5 of 16 in ai agent hosting

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 2026-09-16 · scores move as sites change

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To cite this score: legit.show/s/substructure-ai/2026-09-16. That address never changes; this page moves with every re-measure.

Legit.Show scored Substructure 81/100 on 2026-09-16, measured across all 7 frames from its public surface. legit.show/s/substructure-ai/2026-09-16

Is Substructure production-ready?

Legit.Show scores Substructure 81 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Substructure (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 72/100
Accessibility — 95/100
Security — 25/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 75/100
How this compares across the catalogue: The Privacy Gap
Reliability — 100/100
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 — 257 ms to first byte.
Returns a proper 404 for unknown routes.
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 built it

product account @substructureai

Who it's for

Developers · Small teams · Companies running multiple agents · Team leads · Operations teams

Pricing

Dev $29/month (1,500 turns), Pro $99/month (25,000 turns), Scale $299/month (100,000 turns); 14-day free trial

Sources and updates

Description: Taken from substructure.ai's own website on 2026-08-15.
Operator: Substructure, as named in substructure.ai'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 2026-09-16.

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

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