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Deezer vs MusicBrainz

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

APIDeezerNEW—MusicBrainzNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCore data CC0; some supplementary data CC BY-NC-SA 3.0
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublished~1 request/second per IP; descriptive User-Agent required
In directory since2026-07-052026-07-05
operationalpartialdownno data

Deezer vs MusicBrainz: common questions

Which is more reliable, Deezer or MusicBrainz?

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

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

Can I call Deezer and MusicBrainz from the browser?

Only MusicBrainz is browser-friendly — it returns CORS headers over HTTPS. Deezer needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Deezer and MusicBrainz free for commercial use?

Deezer has unclear commercial terms, and MusicBrainz 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.