Lettr 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.

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

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.

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

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.

Lettr

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

turboSMTP

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