Productivity

LetterKing

Last updated 2026-09-25 · benchmark measured 2026-09-25 — deterministic & reproducible

LetterKing is a bid-based leaderboard where newsletters compete for visibility.

Are you the maker of LetterKing? Claim this listing. It is free, takes a meta tag, a DNS record or GitHub admin rights, and never changes the score.

Launched something? Add your product, free.

To cite this score: legit.show/s/letterking-world/2026-09-25. That address never changes; this page moves with every re-measure.

Legit.Show scored LetterKing 63/100 on 2026-09-25, measured across 5 of 7 frames from its public surface. legit.show/s/letterking-world/2026-09-25

Is LetterKing production-ready?

Legit.Show scores LetterKing 63 out of 100 — the simple average of its 5 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on LetterKing (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. 5 of the seven frames returned a score; Performance and Accessibility were not measurable on this service and are recorded as null — not as zero. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — not measurable on this service (null — not scored as 0)
• Accessibility — not measurable on this service (null — not scored as 0)
• Security — 45/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 25/100
  How this compares across the catalogue: The Privacy Gap
• Reliability — 100/100
• Standards — 75/100
• Discoverability — 72/100

What we measured

• Security headers present: HSTS.
• No Content-Security-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 219 ms to first byte.
• Returns a proper 404 for unknown routes.
• 1 of 1 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.

Who it's for

Newsletter publishers · Indie Hackers · Content creators · Substack writers · Business newsletter operators

Pricing

Minimum bid of $10 to enter competition

Sources and updates

Description

Taken from letterking.world's own website on 2026-09-25.

Operator

LetterKing, as named in letterking.world'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 2026-09-25.

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

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