Mailjet

Mailjet (Sinch) offers transactional plus marketing with EU data residency. Drag-and-drop builder is among the better ones. API is solid but not differentiated.

Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.

Against high-frequency programmatic sends where a missed delivery is a product failure, Mailjet covers webhook coverage, event stream, the suppressions API, batch sending, and SDK breadth, and does not cover idempotency keys. Whether that gap matters depends on how central those are to the build.

• Idempotency keys: No
• Webhooks: Yes
• Event stream: Yes
• Operating since: Not published
• Suppressions API: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Batch sending: Yes
• SDKs: node, python, go, ruby, php, java, dotnet
• Deliverability: Solid for European-routed mail.

Solid for European-routed mail.

EU-based teams with GDPR-sensitive recipients.