Chess.com vs PotterDB
Same instrument, two spec sheets — measured, not claimed.
Chess.com vs PotterDB: common questions
Which is more reliable, Chess.com or PotterDB?
Both are neck-and-neck — Chess.com and PotterDB each measure 99.44% 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, Chess.com or PotterDB?
Chess.com has the lower median latency in our checks — Chess.com responds in 121 ms versus PotterDB at 326 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 Chess.com and PotterDB need an API key?
Neither needs a paid key — Chess.com is callable with no signup, and PotterDB is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Chess.com and PotterDB from the browser?
Yes — both Chess.com and PotterDB 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 Chess.com and PotterDB free for commercial use?
Chess.com has unclear commercial terms, and PotterDB 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.