Is Prompt Builder secure?

Legit.Show measured Prompt Builder's Security frame at 100/100. Security headers present: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy. Served over HTTPS with a valid certificate.

How does Legit.Show measure Prompt Builder?

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

Prompt Builder

Last updated 2026-08-26 · benchmark measured 2026-09-27 — deterministic & reproducible

Prompt Builder is a workspace for creating, organizing, and testing AI prompts.

87/100

7/7 frames

Top 21% of 14,148 measured · #2 of 25 in ai prompt library

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 2026-09-27 · scores move as sites change

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To cite this score: legit.show/s/promptbuilder-space/2026-09-27. That address never changes; this page moves with every re-measure.

Legit.Show scored Prompt Builder 87/100 on 2026-09-27, measured across all 7 frames from its public surface. legit.show/s/promptbuilder-space/2026-09-27

Is Prompt Builder production-ready?

Legit.Show scores Prompt Builder 87 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Prompt Builder (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Security; its weakest is Performance. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 45/100
Accessibility — 91/100
Security — 100/100
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

Security headers present: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 727 ms to first byte.
Returns a proper 404 for unknown routes.
1 of 1 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

AI practitioners · Teams and professionals · Prompt engineers · Developers · Content creators

Pricing

Free plan with limits (3 saved prompts, 5 blocks per prompt, 2 folders); Pro at $10/month or $75/year (unlimited everything)

Sources and updates

Description: Taken from promptbuilder.space's own website on 2026-08-26.
Operator: Prompt Builder Inc., as named in promptbuilder.space'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 2026-09-27.

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

Visit Prompt Builder → · Alternatives to Prompt Builder → · How this was measured →