Cisco Spark vs Telegraph
Same instrument, two spec sheets — measured, not claimed.
Cisco Spark vs Telegraph: common questions
Which is more reliable, Cisco Spark or Telegraph?
On our scheduled checks, Cisco Spark leads on measured uptime — Cisco Spark 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, Cisco Spark or Telegraph?
Telegraph has the lower median latency in our checks — Cisco Spark responds in 1608 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 Cisco Spark and Telegraph need an API key?
Both ask you to authenticate — Cisco Spark 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 Cisco Spark and Telegraph from the browser?
Yes — both Cisco Spark and Telegraph 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 Cisco Spark and Telegraph free for commercial use?
Cisco Spark 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.