Knock vs SMTP2GO pricing

Name: Knock (Email APIs)
Brand: Knock

Verified 2026-10-23 (2 days ago)Source: Knock: knock.app/pricing, SMTP2GO: www.smtp2go.com/pricing/Verified shows the older of the two.

Monthly cost at three volumes

These services do not bill on a shared metric, so a like-for-like cost is unlisted.

Tiers of Knock and SMTP2GO aligned by position: free, entry, mid, top
Position	Knock	SMTP2GO
Free	$0 / moFree · 10,000 messages sent (any channel) / mo	$0 / moFree Plan · 1,000 emails sent / mo
Entry	$250 / moStarter · 50,000 messages sent (any channel) / mo	$15 / moStarter · 10,000 emails sent / mo
Mid	no tier	no tier
Top	Contact salesEnterprise	$75 / moProfessional · 100,000 emails sent / mo

Tightest documented rate limit of each service
Measure	Knock	SMTP2GO
Tightest limit	unlisted	unlisted

No changes recorded.

No change detected for either service in the last 90 days.