Helium vs VATComply
Same instrument, two spec sheets — measured, not claimed.
Helium vs VATComply: common questions
Which is more reliable, Helium or VATComply?
On our scheduled checks, VATComply leads on measured uptime — Helium at —% versus VATComply 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 VATComply need an API key?
Neither needs a paid key — Helium is callable with no signup, and VATComply is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Helium and VATComply from the browser?
Only VATComply 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 VATComply free for commercial use?
Helium has unclear commercial terms, and VATComply 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.