Knock vs Plunk pricing

Name: Knock (Email APIs)
Brand: Knock

Verified 2026-10-24 (1 day ago)Source: Knock: knock.app/pricing, Plunk: www.useplunk.com/pricingVerified 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 Plunk aligned by position: free, entry, mid, top
Position	Knock	Plunk
Free	$0 / moFree · 10,000 messages sent (any channel) / mo	$0 / moFree · 1,000 emails sent / mo
Entry	$250 / moStarter · 50,000 messages sent (any channel) / mo	$0 base + usagePay as you grow
Mid	no tier	no tier
Top	Contact salesEnterprise	no tier

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

No changes recorded.

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