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Lobsters vs Slack

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

APILobstersHEALTHY97SlackHEALTHY97
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms243324
P95 · ms1175808
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Lobsters vs Slack: common questions

Which is more reliable, Lobsters or Slack?

Both are neck-and-neck — Lobsters and Slack 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, Lobsters or Slack?

Lobsters has the lower median latency in our checks — Lobsters responds in 243 ms versus Slack at 324 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 Lobsters and Slack need an API key?

Lobsters needs no key, while Slack requires a free API key. If you want to start calling without signup, reach for Lobsters first.

Can I call Lobsters and Slack from the browser?

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

Are Lobsters and Slack free for commercial use?

Lobsters has unclear commercial terms, and Slack 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.