shipapis
StarSubmit an APISubmit API

Nexmo API vs PostStack

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

APINexmo APIHEALTHY93PostStackHEALTHY87
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms5671066
P95 · ms12211890
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limit10, 120;w=60;name="crd|generic_key^nexmo-gloo.sanity-service-remote-address-120-rpm|remote_address", 10;w=1;name="crd|generic_key^nexmo-gloo.sanity-service-remote-address-10-rps|remote_address" req/window · 9 remaining · resets 1Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Nexmo API vs PostStack: common questions

Which is more reliable, Nexmo API or PostStack?

Both are neck-and-neck — Nexmo API and PostStack each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Nexmo API or PostStack?

Nexmo API has the lower median latency in our checks — Nexmo API responds in 567 ms versus PostStack at 1066 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 Nexmo API and PostStack need an API key?

Both ask you to authenticate — Nexmo API uses an API key and PostStack 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 Nexmo API and PostStack from the browser?

Neither sends browser-friendly CORS headers reliably, so call Nexmo API and PostStack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Nexmo API and PostStack free for commercial use?

Nexmo API has unclear commercial terms, and PostStack 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.