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.

At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.

Against a waitlist, a launch announcement, onboarding email, and the first transactional sends, Brevo covers developer experience, scheduling, SDK breadth, and webhook coverage, and does not cover operating track record. Whether that gap matters depends on how central those are to the build.

• Free tier: 300/day permanent
• Best published rate per 1,000: Tiers not published in comparable form
• Starts at: $9/mo for 5,000 emails
• DX score: 7/10
• Deliverability: Reliable for marketing and transactional; per-day free-tier limits prevent spam abuse.
• Operating since: 2012
• Scheduling: Yes
• SDKs: node, python, go, ruby, php, java, dotnet
• Webhooks: Yes

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.