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Bluesky vs mail.tm

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

APIBlueskyHEALTHY96mail.tmHEALTHY82
Uptime · 30d
Uptime · 90d97.1%84.3%
Uptime · 30d100%75.0%
P50 · ms268709
P95 · ms12002351
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — public AppView, no keyFree — temporary mailboxes
Rate limitUnpublishedRate limited (429 on exceed); exact policy per docs.mail.tm
In directory since2026-07-052026-07-05
operationalpartialdownno data

Bluesky vs mail.tm: common questions

Which is more reliable, Bluesky or mail.tm?

On our scheduled checks, Bluesky leads on measured uptime — Bluesky at 97.1% versus mail.tm at 84.3% 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, Bluesky or mail.tm?

Bluesky has the lower median latency in our checks — Bluesky responds in 268 ms versus mail.tm at 709 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 Bluesky and mail.tm need an API key?

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

Can I call Bluesky and mail.tm from the browser?

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

Are Bluesky and mail.tm free for commercial use?

Bluesky has unclear commercial terms, and mail.tm 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.