WHEN TO CONSIDER IT
Consider when transactional email is part of a broader customer messaging workflow.
Marketing + transactional
A customer messaging platform with transactional email API documentation.
WHEN TO CONSIDER IT
Consider when transactional email is part of a broader customer messaging workflow.
WHAT TO CHECK FIRST
Daily free sending caps can constrain bursts; contact allowances, automation and support depend on the selected plan.
Editorial interpretation of the sourced facts; not hands-on testing.
Reviewed pricing does not establish a separate data or attachment transfer rate. This is not confirmation that all such charges are zero.
Reviewed 2026-09-08
Reviewed source 1 ↗Custom sending domains are documented, but a numerical domain allowance was not established.
Reviewed 2026-09-08
Reviewed source 1 ↗Reviewed source 2 ↗Reviewed 2026-09-08. Values are taken from official materials; plan restrictions may apply. Delivery speed, observed uptime and inbox placement have not been independently measured.
Email delivery and editing tools with API, SMTP and marketing features.
6,000/month; 200/day
Email API and SMTP service with a separate marketing product and tiered delivery features.
API Free: up to 3,000/month; verify daily conditions
Hosted open-source platform for transactional email, campaigns and automation.
1,000 emails/month; Plunk branding.