Zelda vs PotterDB
Same instrument, two spec sheets — measured, not claimed.
Zelda vs PotterDB: common questions
Which is more reliable, Zelda or PotterDB?
On our scheduled checks, PotterDB leads on measured uptime — Zelda at —% versus PotterDB 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 Zelda and PotterDB need an API key?
Neither needs a paid key — Zelda 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 Zelda and PotterDB from the browser?
Yes — both Zelda 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 Zelda and PotterDB free for commercial use?
Zelda 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.