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Abstract Email Validation vs Notion

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

APIAbstract Email ValidationDEAD0NotionREACHABLE100
Uptime · 30d
Uptime · 90d0.0%100%
Uptime · 30d0.0%100%
P50 · ms—524
P95 · ms—3096
AuthapiKeyoauth
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — 100 requests/monthOAuth — some read routes may be public
Rate limit100 requests/month on free planUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Abstract Email Validation vs Notion: common questions

Which is more reliable, Abstract Email Validation or Notion?

On our scheduled checks, Notion leads on measured uptime — Abstract Email Validation at 0.0% versus Notion at 100% 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 Abstract Email Validation and Notion need an API key?

Both ask you to authenticate — Abstract Email Validation uses an API key and Notion uses OAuth. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Abstract Email Validation and Notion from the browser?

Yes — both Abstract Email Validation and Notion send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Abstract Email Validation and Notion free for commercial use?

Abstract Email Validation has unclear commercial terms, and Notion 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.