OpenPLZ API vs Postali
Same instrument, two spec sheets — measured, not claimed.
OpenPLZ API vs Postali: common questions
Which is more reliable, OpenPLZ API or Postali?
On our scheduled checks, Postali leads on measured uptime — OpenPLZ API at 99.02% versus Postali at 100% 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, OpenPLZ API or Postali?
Postali has the lower median latency in our checks — OpenPLZ API responds in 561 ms versus Postali at 69 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 OpenPLZ API and Postali need an API key?
Neither needs a paid key — OpenPLZ API is callable with no signup, and Postali is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call OpenPLZ API and Postali from the browser?
Yes — both OpenPLZ API and Postali 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 OpenPLZ API and Postali free for commercial use?
OpenPLZ API has unclear commercial terms, and Postali 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.