Knock vs ZidiMail

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

ZidiMail

See full pricing history

USD · US · source: zidimails.com

Plan	Pricing	Charged by	Offer type
Free	Free $0 forever	Flat · published subscription	Standalone · Free
Pro Highlighted	USD 10.5 monthly $10.50/month	Flat · published subscription	Standalone · Fixed
Scale	USD 45 monthly $45/month	Flat · published subscription	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

ZidiMail

Free

Official plan card Emails: 3,000/month

Limited
Official plan card Verified domains: 2

Limited
Official plan card REST API and SMTP relay: Included

Pro

Official plan card Emails: 30,000/month

Limited
Official plan card Custom domains: 10

Limited
Official plan card Webhooks and event logs: Included

Scale

Official plan card Emails: 65,000/month

Limited
Official plan card Custom domains: Unlimited

Limited
Official plan card Log retention: 30 days

Limited

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

ZidiMail

August 27, 2026 Source
- Free: Free
- Pro: USD 10.5 monthly
- Scale: USD 45 monthly