Kroki vs npm Registry
Same instrument, two spec sheets — measured, not claimed.
Kroki vs npm Registry: common questions
Which is more reliable, Kroki or npm Registry?
Both are neck-and-neck — Kroki and npm Registry each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, Kroki or npm Registry?
npm Registry has the lower median latency in our checks — Kroki responds in 633 ms versus npm Registry at 243 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do Kroki and npm Registry need an API key?
Neither needs a paid key — Kroki is callable with no signup, and npm Registry is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Kroki and npm Registry from the browser?
Yes — both Kroki and npm Registry send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Kroki and npm Registry free for commercial use?
Kroki has unclear commercial terms, and npm Registry 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.