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VATComply vs Frankfurter

Same instrument, two spec sheets — measured, not claimed.

APIVATComplyNEW—FrankfurterHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic data (ECB reference rates)
Free tierFree — limits not publishedUnlimited — abuse-rate-limited only
Rate limitUnpublishedUnpublished, generous
In directory since2026-07-052026-05-02
operationalpartialdownno data

VATComply vs Frankfurter: common questions

Which is more reliable, VATComply or Frankfurter?

On our scheduled checks, Frankfurter leads on measured uptime — VATComply at —% versus Frankfurter 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 VATComply and Frankfurter need an API key?

Neither needs a paid key — VATComply is callable with no signup, and Frankfurter is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call VATComply and Frankfurter from the browser?

Yes — both VATComply 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 VATComply and Frankfurter free for commercial use?

VATComply 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.