Simkl vs xColors
Same instrument, two spec sheets — measured, not claimed.
Simkl vs xColors: common questions
Which is more reliable, Simkl or xColors?
On our scheduled checks, xColors leads on measured uptime — Simkl at —% versus xColors 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 Simkl and xColors need an API key?
Neither needs a paid key — Simkl is callable with no signup, and xColors is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Simkl and xColors from the browser?
Yes — both Simkl and xColors 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 Simkl and xColors free for commercial use?
Simkl has unclear commercial terms, and xColors 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.