IPMA vs Open-Meteo
Same instrument, two spec sheets — measured, not claimed.
IPMA vs Open-Meteo: common questions
Which is more reliable, IPMA or Open-Meteo?
On our scheduled checks, IPMA leads on measured uptime — IPMA at 98.0% versus Open-Meteo at 95.1% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, IPMA or Open-Meteo?
Open-Meteo has the lower median latency in our checks — IPMA responds in 1024 ms versus Open-Meteo at 673 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 IPMA and Open-Meteo need an API key?
Neither needs a paid key — IPMA is callable with no signup, and Open-Meteo is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call IPMA and Open-Meteo from the browser?
Yes — both IPMA and Open-Meteo 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 IPMA and Open-Meteo free for commercial use?
IPMA has unclear commercial terms, and Open-Meteo is personal/non-commercial only. 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.