Knock vs turboSMTP

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

turboSMTP

See full pricing history

EUR · US · source: serversmtp.com

Plan	Pricing	Charged by	Offer type
FREE Highlighted	Free €0/	Flat	Standalone · Free
PRO Featured	EUR 79.95 monthly €79.95/ month billed monthly	Flat · / month	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

turboSMTP

FREE

Highlights Up to 200 emails/day: Included
Highlights SMTP Relay and Web API: Included
Highlights SPF / DKIM Authentication: Included
Highlights Dedicated IP (Pro only): Included

PRO Featured

Highlights Up to 15,000 emails/mo: Included
Highlights SMTP Relay and Web API: Included
Highlights SPF / DKIM Authentication: Included
Highlights Dedicated IP & Custom Routing: Included
Highlights Full Analytics Database (365d): Included
Highlights Up to 100 Subaccounts: Included
Highlights VIP Priority Support channels: Included

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

turboSMTP

August 27, 2026 Source
- FREE: Free
- PRO Featured: EUR 79.95 monthly