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Kroki vs PageBolt

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

APIKrokiNEW—PageBoltNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Kroki vs PageBolt: common questions

Which is more reliable, Kroki or PageBolt?

On our scheduled checks, PageBolt leads on measured uptime — Kroki at —% versus PageBolt 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 Kroki and PageBolt need an API key?

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

Can I call Kroki and PageBolt from the browser?

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

Are Kroki and PageBolt free for commercial use?

Kroki has unclear commercial terms, and PageBolt 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.