AI & Agents
Gutter
Last updated 2026-07-27 · benchmark measured 2026-08-11 — deterministic & reproducible
AI-powered book formatting service for Amazon KDP and Kindle publishing.
Is Gutter production-ready?
Legit.Show scores Gutter 62 out of 100 — the simple average of its 6 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Gutter (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. 6 of the seven frames returned a score; Accessibility was not measurable on this service and is recorded as null — not as zero. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 60/100
- Accessibility — not measurable on this service (null — not scored as 0)
- Security — 25/100
- Privacy — 25/100
- Reliability — 100/100
- Standards — 75/100
- Discoverability — 87/100
What we measured
- No Content-Security-Policy and no HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 2368 ms to first byte.
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- No privacy policy found.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: structured data, sitemap, canonical URL.
Who it's for
Self-published authors · KDP publishers · eBook creators · Independent writers · Print-on-demand publishers
Pricing
Per-page pricing calculated on upload; free analysis available
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