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