Slack vs Telegraph
Same instrument, two spec sheets — measured, not claimed.
Slack vs Telegraph: common questions
Which is more reliable, Slack or Telegraph?
On our scheduled checks, Telegraph leads on measured uptime — Slack at —% versus Telegraph 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 Slack and Telegraph need an API key?
Both ask you to authenticate — Slack 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 Slack and Telegraph from the browser?
Yes — both Slack 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 Slack and Telegraph free for commercial use?
Slack 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.