PostStack vs Telegraph
Same instrument, two spec sheets — measured, not claimed.
PostStack vs Telegraph: common questions
Which is more reliable, PostStack or Telegraph?
On our scheduled checks, PostStack leads on measured uptime — PostStack at 100% versus Telegraph at 99.02% 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, PostStack or Telegraph?
Telegraph has the lower median latency in our checks — PostStack responds in 1066 ms versus Telegraph at 801 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 PostStack and Telegraph need an API key?
Both ask you to authenticate — PostStack uses an API key and Telegraph uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call PostStack and Telegraph from the browser?
Only Telegraph is browser-friendly — it returns CORS headers over HTTPS. PostStack needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are PostStack and Telegraph free for commercial use?
PostStack has unclear commercial terms, and Telegraph 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.