Aare.guru API vs Website Carbon
Same instrument, two spec sheets — measured, not claimed.
Aare.guru API vs Website Carbon: common questions
Which is more reliable, Aare.guru API or Website Carbon?
Both are neck-and-neck — Aare.guru API and Website Carbon each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, Aare.guru API or Website Carbon?
Website Carbon has the lower median latency in our checks — Aare.guru API responds in 1025 ms versus Website Carbon at 37 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 Aare.guru API and Website Carbon need an API key?
Neither needs a paid key — Aare.guru API is callable with no signup, and Website Carbon is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Aare.guru API and Website Carbon from the browser?
Only Aare.guru API is browser-friendly — it returns CORS headers over HTTPS. Website Carbon needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Aare.guru API and Website Carbon free for commercial use?
Aare.guru API has unclear commercial terms, and Website Carbon 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.