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