Helium vs Tax Data
Same instrument, two spec sheets — measured, not claimed.
Helium vs Tax Data: common questions
Which is more reliable, Helium or Tax Data?
On our scheduled checks, Tax Data leads on measured uptime — Helium at —% versus Tax Data 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 Helium and Tax Data need an API key?
Helium needs no key, while Tax Data requires a free API key. If you want to start calling without signup, reach for Helium first.
Can I call Helium and Tax Data from the browser?
Only Tax Data is browser-friendly — it returns CORS headers over HTTPS. Helium needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Helium and Tax Data free for commercial use?
Helium has unclear commercial terms, and Tax Data 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.