Kroki vs QuickChart
Same instrument, two spec sheets — measured, not claimed.
Kroki vs QuickChart: common questions
Which is more reliable, Kroki or QuickChart?
Both are neck-and-neck — Kroki and QuickChart 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 QuickChart?
QuickChart has the lower median latency in our checks — Kroki responds in 633 ms versus QuickChart at 318 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 QuickChart need an API key?
Neither needs a paid key — Kroki is callable with no signup, and QuickChart is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Kroki and QuickChart from the browser?
Only Kroki is browser-friendly — it returns CORS headers over HTTPS. QuickChart needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Kroki and QuickChart free for commercial use?
Kroki has unclear commercial terms, and QuickChart 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.