Sendlib is now 100% open source, creator Samuel Tuoyo said in a post on X. Its public code is licensed under the GNU Affero General Public License, Version 3.
Tuoyo built the project after finding the SPF, DKIM and DMARC setup required to send welcome emails for a new MVP frustrating. Sendlib uses Gmail API with OAuth 2.0 for delivery instead of traditional SMTP and domain configuration.
The project is aimed at founders and developers sending transactional messages such as welcome emails, password resets and receipts through a product’s existing Gmail account. Its site says users do not need to add SPF, DKIM, MX or TXT records because messages route through Google’s infrastructure.
The free plan allows up to 200 emails a day per Gmail account, or 1,000 a day for Google Workspace, with a monthly cap of 3,500. The Pro plan costs ₦4,000 a month and raises daily limits to 500 per Gmail account and 2,000 for Workspace, with no monthly cap.
The Sendlib repository shows 10 stars, one fork and 238 commits, with no open issues or pull requests. A separate community-maintained Node.js SDK describes itself as unofficial.
Tuoyo’s GitHub profile identifies him as a Full-Stack & Product Engineer. It also lists Dokugen, an open-source README-generator CLI with 325 stars.
Sendlib is separate from an unrelated enterprise email-delivery platform using the SendLib name at sendlib.com.
