Knock vs Lettermint

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

Knock

See full pricing history

USD · US · source: knock.app

Plan	Pricing	Charged by	Offer type
Developer	Free $0/month	Flat · monthly subscription	Standalone · Free
Starter	USD 250 monthly $250/month including 50,000 messages; then $0.005/message	Usage · monthly platform fee plus message usage	Standalone · Usage based
Enterprise	Contact sales Contact us	Flat · monthly subscription	Standalone · Contact sales

Lettermint

See full pricing history

EUR · US · source: lettermint.co

Plan	Pricing	Charged by	Offer type
Free	Free Free	Flat	Standalone · Free
Starter Highlighted	EUR 10 monthly · EUR 1.5 per 1.000 emails €10 /mo 10.000 emails/month Extra emails: €1.50 / 1.000	Flat · /mo	Standalone · Fixed
Growth	EUR 13 monthly · EUR 1.15 per 1.000 emails €13 /mo 10.000 emails/month Extra emails: €1.15 / 1.000	Flat · /mo	Standalone · Fixed
Pro	EUR 15 monthly · EUR 1.1 per 1.000 emails €15 /mo 10.000 emails/month Extra emails: €1.10 / 1.000	Flat · /mo	Standalone · Fixed

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

Knock

Developer

Official plan card Messages: 10,000/month

Limited
Official plan card Notification workflows: Unlimited

Limited
Official plan card Delivery channels: Unlimited

Limited

Starter

Official plan card Messages: 50,000/month included

Limited
Official plan card Additional messages: $0.005 each

Limited
Official plan card Guides active users: 2,500

Limited

Enterprise

Official plan card Volume discounts: Included
Official plan card Custom roles and permissions: Included
Official plan card Enterprise controls: Included

Lettermint

Free

Volume and limits Monthly emails included: 300

Included
Volume and limits Monthly Limit: 300

Limited
Domains and IPs Sending Domains: 1

Included
Domains and IPs Projects: 1

Included
Team and access Users: 1

Included
Developer tools SMTP Relay: Included
Developer tools Integrations and SDKs: Included
Highlights No credit card required: Included

Starter

Volume and limits Monthly emails included: 10.000

Included
Volume and limits Monthly Limit: No limit

Included
Domains and IPs Sending Domains: 5

Included
Domains and IPs Projects: Unlimited

Included
Team and access Users: Unlimited

Included
Support Basic customer support: Included
Analytics Essential analytics: Included

Growth

Volume and limits Monthly emails included: 10.000

Included
Volume and limits Monthly Limit: No limit

Included
Domains and IPs Sending Domains: 30

Included
Domains and IPs Projects: Unlimited

Included
Team and access Users: Unlimited

Included
Support Basic customer support: Included
Analytics Essential analytics: Included

Pro

Volume and limits Monthly emails included: 10.000

Included
Volume and limits Monthly Limit: No limit

Included
Domains and IPs Sending Domains: Unlimited

Included
Domains and IPs Projects: Unlimited

Included
Team and access Users: Unlimited

Included
Support Priority customer support: Included
Analytics Advanced analytics: Included

How their prices changed

Each date shows when a public price was observed, not when it took effect. An archived region or currency can differ, so a currency change is not necessarily a price increase.

Knock

August 27, 2026
Official pricing page
- Developer: Free
- Starter: USD 250 monthly
- Enterprise: Contact sales

Lettermint

September 21, 2026
Official pricing page
- Free: Free
- Starter: EUR 10 monthly · EUR 1.5 per 1.000 emails
- Growth: EUR 13 monthly · EUR 1.15 per 1.000 emails
- Pro: EUR 15 monthly · EUR 1.1 per 1.000 emails
August 31, 2026
Official pricing page
- Free: Free
- Starter: EUR 10 monthly
- Growth: EUR 13 monthly
- Pro: EUR 15 monthly
August 27, 2026
Official pricing page
- Free: Free
- Starter: EUR 10 monthly
- Growth: EUR 13 monthly
- Pro: EUR 15 monthly