Lettr vs Postmark

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.

Lettr

See full pricing history

USD · US · source: lettr.com

Plan	Pricing	Charged by	Offer type
Free	Free $0 /mo	Flat	Standalone · Free
Pro	USD 15 monthly $15 /mo	Flat	Standalone · Fixed
Business	USD 110 monthly $110 /mo	Flat	Standalone · Fixed
Enterprise	Contact sales Contact sales	Flat	Standalone · Contact sales

Postmark

See full pricing history

USD · US · source: postmarkapp.com

Plan	Pricing	Charged by	Offer type
Free — Developer tier	Free $0.00 /mo	Flat · per month	Standalone · Free
Basic — Basic	USD 15 monthly $15.00 /mo	Flat · per month	Standalone · Fixed
Pro — Pro Highlighted	USD 16.5 monthly $16.50 /mo	Flat · per month	Standalone · Fixed
Platform — Platform	USD 18 monthly $18.00 /mo	Flat · per 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.

Lettr

Free

Highlights Monthly emails: 3,000

Included
Highlights Sending domains: 1

Included
Highlights Data retention: 7 days

Included

Pro

Highlights Monthly emails: 50,000

Included
Highlights Sending domains: 10

Included
Highlights Data retention: 30 days

Included

Business

Highlights Monthly emails: 200,000

Included
Highlights Sending domains: Unlimited

Included
Highlights Dedicated IPs: Add-on

Included

Enterprise

Highlights Monthly emails: Unlimited

Included
Highlights SSO/SAML: Included
Highlights SLA guarantee: Included

Postmark

Free — Developer tier

Highlights Emails per month: 100 emails/month

Included
Highlights Daily email limit: Unlimited

Included
Highlights Inbound Email - Transactional Message Streams: Up to 30 streams

Included
Highlights Servers: Up to 10 servers

Included
Highlights Custom sending domains: Up to 10 domains

Included
Highlights Email template editor & import tool: Included

Included
Highlights Full message retention: 45 Days

Included
Highlights Users: Up to 6 users

Included

Basic — Basic

Highlights Emails per month: Starting at 10,000 emails/month

Included
Highlights Extra emails: $1.80 / 1,000

Included
Highlights Daily email limit: Unlimited

Included
Highlights Inbound Email - Transactional Message Streams: Up to 15 streams

Included
Highlights Servers: Up to 5 servers

Included
Highlights Custom sending domains: Up to 5 domains

Included
Highlights Email template editor & import tool: Included

Included
Highlights Full message retention: 45 Days

Included
Highlights Users: Up to 4 users

Included

Pro — Pro

Highlights Emails per month: Starting at 10,000 emails/month

Included
Highlights Extra emails: $1.30 / 1,000

Included
Highlights Daily email limit: Unlimited

Included
Highlights Inbound Email - Transactional Message Streams: Up to 30 streams

Included
Highlights Servers: Up to 10 servers

Included
Highlights Custom sending domains: Up to 10 domains

Included
Highlights Email template editor & import tool: Included

Included
Highlights Full message retention: 45 Days (custom retention available as add-on)

Included
Highlights Users: Up to 6 users

Included
Highlights Inbound email processing: Included

Included

Platform — Platform

Highlights Emails per month: Starting at 10,000 emails/month

Included
Highlights Extra emails: $1.20 / 1,000

Included
Highlights Daily email limit: Unlimited

Included
Highlights Inbound Email - Transactional Message Streams: Unlimited

Included
Highlights Servers: Unlimited

Included
Highlights Custom sending domains: Unlimited

Included
Highlights Email template editor & import tool: Included

Included
Highlights Full message retention: 45 Days (custom retention available as add-on)

Included
Highlights Users: Unlimited users

Included
Highlights Inbound email processing: Included

Included

How their prices changed

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

Lettr

August 27, 2026 Source
- Free: Free
- Pro: USD 15 monthly
- Business: USD 110 monthly
- Enterprise: Contact sales

Postmark

August 27, 2026 Source
- Free — Developer tier: Free
- Basic — Basic: USD 15 monthly
- Pro — Pro: USD 16.5 monthly
- Platform — Platform: USD 18 monthly