Helium vs Marketstack
Same instrument, two spec sheets — measured, not claimed.
Helium vs Marketstack: common questions
Which is more reliable, Helium or Marketstack?
On our scheduled checks, Marketstack leads on measured uptime — Helium at —% versus Marketstack 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 Marketstack need an API key?
Helium needs no key, while Marketstack requires a free API key. If you want to start calling without signup, reach for Helium first.
Can I call Helium and Marketstack from the browser?
Neither sends browser-friendly CORS headers reliably, so call Helium and Marketstack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Helium and Marketstack free for commercial use?
Helium has unclear commercial terms, and Marketstack 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.