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Cutt.ly vs Kroki

Same instrument, two spec sheets — measured, not claimed.

APICutt.lyNEW—KrokiNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Cutt.ly vs Kroki: common questions

Which is more reliable, Cutt.ly or Kroki?

On our scheduled checks, Kroki leads on measured uptime — Cutt.ly at —% versus Kroki at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Cutt.ly and Kroki need an API key?

Kroki needs no key, while Cutt.ly requires a free API key. If you want to start calling without signup, reach for Kroki first.

Can I call Cutt.ly and Kroki from the browser?

Only Kroki is browser-friendly — it returns CORS headers over HTTPS. Cutt.ly needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Cutt.ly and Kroki free for commercial use?

Cutt.ly has unclear commercial terms, and Kroki has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.