If you've ever integrated Brevo (formerly Sendinblue) into a Node.js or Next.js SaaS app, you already know the pain:

You copy-paste transactional email logic across three projects

Your webhook handler has no signature verification and breaks randomly

Your "drip sequence" is three setTimeout calls held together with prayer

GDPR right-to-erasure is a TODO comment from six months ago

Every new dev on the team re-implements the same contact sync logic

I've shipped three SaaS products in production using Brevo. After extracting and refining the same patterns over and over, I packaged everything into brevo-saas-kit — a production-grade, zero-opinion email automation library for Node.js SaaS applications.

This isn't a thin wrapper around the Brevo API.…