Templates, sending, and logs - without the $20/month markup
Transactional email APIs are convenient until free tiers cap daily volume - or you pay for SMTP you already have. LetterStack is the developer layer on your own SMTP: Handlebars templates, one REST send endpoint, send logs. Connect Gmail, Amazon SES, Zoho, or self-hosted. Your SMTP, your reputation. No volume caps from us. From $1/mo. First month free through June 30, 2026.
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