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Nexmo API vs The SMS Works API

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

APINexmo APIHEALTHY93The SMS Works APIHEALTHY94
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms567518
P95 · ms12211101
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key 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 The SMS Works API: common questions

Which is more reliable, Nexmo API or The SMS Works API?

Both are neck-and-neck — Nexmo API and The SMS Works API 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 The SMS Works API?

The SMS Works API has the lower median latency in our checks — Nexmo API responds in 567 ms versus The SMS Works API at 518 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 The SMS Works API need an API key?

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

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

Are Nexmo API and The SMS Works API free for commercial use?

Nexmo API has unclear commercial terms, and The SMS Works API 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.