Knock vs SMTP2GO

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

SMTP2GO

See full pricing history

USD · US · source: www.smtp2go.com

Plan	Pricing	Charged by	Offer type
Starter	USD 10 monthly $10/mo	Flat · /mo	Standalone · Fixed
Professional	USD 75 monthly $75/mo	Flat · /mo	Standalone · Fixed
Free	Free $ 0/	Flat	Standalone · Free

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

SMTP2GO

Starter

Highlights 10,000 emails/mo: Included
Highlights 30 days of email reporting: Included
Highlights Ticket/chat/phone support: Included
Highlights Subaccount management: Included
Highlights SMS messaging: Included

Professional

Highlights 100,000 emails/mo: Included
Highlights 30 days of email reporting: Included
Highlights Ticket/chat/phone support: Included
Highlights Subaccount management: Included
Highlights Dedicated IP address: Included
Highlights Email testing tools: Included
Highlights SMS messaging: Included

Free

How their prices changed

Each dated row shows the public prices observed when that vendor’s pricing page changed.

Knock

August 27, 2026 Source
- Developer: Free
- Starter: USD 250 monthly
- Enterprise: Contact sales

SMTP2GO

August 27, 2026 Source
- Starter: USD 10 monthly
- Professional: USD 75 monthly
- Free: Free