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CustomGPT.ai vs Stytch

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

APICustomGPT.aiNEW—StytchNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CustomGPT.ai vs Stytch: common questions

Which is more reliable, CustomGPT.ai or Stytch?

On our scheduled checks, Stytch leads on measured uptime — CustomGPT.ai at —% versus Stytch at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do CustomGPT.ai and Stytch need an API key?

Both ask you to authenticate — CustomGPT.ai uses an API key and Stytch 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 CustomGPT.ai and Stytch from the browser?

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

Are CustomGPT.ai and Stytch free for commercial use?

CustomGPT.ai has unclear commercial terms, and Stytch 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.