QuickChart vs RSQ API
Same instrument, two spec sheets — measured, not claimed.
QuickChart vs RSQ API: common questions
Which is more reliable, QuickChart or RSQ API?
Both are neck-and-neck — QuickChart and RSQ API 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, QuickChart or RSQ API?
QuickChart has the lower median latency in our checks — QuickChart responds in 318 ms versus RSQ API at 783 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 QuickChart and RSQ API need an API key?
Neither needs a paid key — QuickChart is callable with no signup, and RSQ API is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call QuickChart and RSQ API from the browser?
Neither sends browser-friendly CORS headers reliably, so call QuickChart and RSQ API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are QuickChart and RSQ API free for commercial use?
QuickChart has unclear commercial terms, and RSQ API 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.