Brevo

Brevo (formerly Sendinblue) bundles transactional, marketing, CRM, and SMS. The 300-emails-per-day free tier is one of the most generous in the market. Best as an all-in-one for small businesses; pure-API users may find the surface broader than they need.

The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.

Against password resets, receipts, and magic links shipped from application code, Brevo covers developer experience, SDK breadth, event stream, and webhook coverage, and does not cover idempotency keys and operating track record. Whether that gap matters depends on how central those are to the build.

• DX score: 7/10
• SDKs: node, python, go, ruby, php, java, dotnet
• Idempotency keys: No
• Operating since: 2012
• Event stream: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Webhooks: Yes
• Deliverability: Reliable for marketing and transactional; per-day free-tier limits prevent spam abuse.
• Free tier: 300/day permanent

Reliable for marketing and transactional; per-day free-tier limits prevent spam abuse.

Small businesses that need email plus marketing plus SMS in one place.