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Audexum vs MailboxValidator Free Email Checker

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

APIAudexumHEALTHY93MailboxValidator Free Email CheckerHEALTHY94
Uptime · 30d
Uptime · 90d97.1%100%
Uptime · 30d95.0%100%
P50 · ms417527
P95 · ms11031138
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Audexum vs MailboxValidator Free Email Checker: common questions

Which is more reliable, Audexum or MailboxValidator Free Email Checker?

On our scheduled checks, MailboxValidator Free Email Checker leads on measured uptime — Audexum at 97.1% versus MailboxValidator Free Email Checker at 100% 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, Audexum or MailboxValidator Free Email Checker?

Audexum has the lower median latency in our checks — Audexum responds in 417 ms versus MailboxValidator Free Email Checker at 527 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 Audexum and MailboxValidator Free Email Checker need an API key?

Both ask you to authenticate — Audexum uses an API key and MailboxValidator Free Email Checker 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 Audexum and MailboxValidator Free Email Checker from the browser?

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

Are Audexum and MailboxValidator Free Email Checker free for commercial use?

Audexum has unclear commercial terms, and MailboxValidator Free Email Checker 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.