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Guerrilla Mail vs Ntropy Transaction API v1

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

APIGuerrilla MailHEALTHY92Ntropy Transaction API v1HEALTHY79
Uptime · 30d
Uptime · 90d95.1%98.0%
Uptime · 30d98.3%96.7%
P50 · ms2981223
P95 · ms16854484
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Guerrilla Mail vs Ntropy Transaction API v1: common questions

Which is more reliable, Guerrilla Mail or Ntropy Transaction API v1?

On our scheduled checks, Ntropy Transaction API v1 leads on measured uptime — Guerrilla Mail at 95.1% versus Ntropy Transaction API v1 at 98.0% 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, Guerrilla Mail or Ntropy Transaction API v1?

Guerrilla Mail has the lower median latency in our checks — Guerrilla Mail responds in 298 ms versus Ntropy Transaction API v1 at 1223 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 Guerrilla Mail and Ntropy Transaction API v1 need an API key?

Neither needs a paid key — Guerrilla Mail is callable with no signup, and Ntropy Transaction API v1 is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Guerrilla Mail and Ntropy Transaction API v1 from the browser?

Only Guerrilla Mail is browser-friendly — it returns CORS headers over HTTPS. Ntropy Transaction API v1 needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Guerrilla Mail and Ntropy Transaction API v1 free for commercial use?

Guerrilla Mail has unclear commercial terms, and Ntropy Transaction API v1 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.