CongressInvests vs Frankfurter
Same instrument, two spec sheets — measured, not claimed.
CongressInvests vs Frankfurter: common questions
Which is more reliable, CongressInvests or Frankfurter?
On our scheduled checks, CongressInvests leads on measured uptime — CongressInvests at 100% versus Frankfurter at 88.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, CongressInvests or Frankfurter?
Frankfurter has the lower median latency in our checks — CongressInvests responds in 615 ms versus Frankfurter at 370 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 CongressInvests and Frankfurter need an API key?
Frankfurter needs no key, while CongressInvests requires a free API key. If you want to start calling without signup, reach for Frankfurter first.
Can I call CongressInvests and Frankfurter from the browser?
Yes — both CongressInvests and Frankfurter send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are CongressInvests and Frankfurter free for commercial use?
CongressInvests has unclear commercial terms, and Frankfurter allows commercial use on its free tier. 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.