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Cisco Spark vs Nexmo API

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

APICisco SparkHEALTHY80Nexmo APIHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1608567
P95 · ms29361221
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublished10, 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 1
In directory since2026-07-052026-07-05
operationalpartialdownno data

Cisco Spark vs Nexmo API: common questions

Which is more reliable, Cisco Spark or Nexmo API?

Both are neck-and-neck — Cisco Spark and Nexmo 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, Cisco Spark or Nexmo API?

Nexmo API has the lower median latency in our checks — Cisco Spark responds in 1608 ms versus Nexmo API at 567 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 Cisco Spark and Nexmo API need an API key?

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

Only Cisco Spark 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 Cisco Spark and Nexmo API free for commercial use?

Cisco Spark has unclear commercial terms, and Nexmo 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.