Tax Data vs Unirate
Same instrument, two spec sheets — measured, not claimed.
Tax Data vs Unirate: common questions
Which is more reliable, Tax Data or Unirate?
On our scheduled checks, Unirate leads on measured uptime — Tax Data at —% versus Unirate 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 Tax Data and Unirate need an API key?
Both ask you to authenticate — Tax Data uses an API key and Unirate uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call Tax Data and Unirate from the browser?
Yes — both Tax Data and Unirate 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 Tax Data and Unirate free for commercial use?
Tax Data has unclear commercial terms, and Unirate 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.