As of 1 Nov 2026, the panel rates Brevo Transactional Email 3/5 and Mailjet Email API 3/5 in Transactional Email. Weighted by what each judge cares about, 2 of the 6 judges pick Brevo Transactional Email and 3 pick Mailjet Email API, 1 calls it a tie. Brevo Transactional Email scores higher on 2 of 7 criteria (Sending API, SMTP & developer experience and Message logs, events & webhooks). Mailjet Email API scores higher on 3 of 7 criteria (Reliability, accounts & support, European sovereignty and Message data, retention & security). Provenance — Brevo Transactional Email: EU-Made; Mailjet Email API: EU-Made. Ratings are the AI panel’s opinion, formed from public evidence: how scores are made.
Brevo Transactional Email's clearest edge is the sending API, 7.3 to Mailjet Email API's 6.2, six judges leaning Brevo and zero Mailjet: documented REST endpoint and SMTP relay, seven official SDKs, batch sending up to 1,000 emails per request, a sandbox mode. Observability leans Brevo two to zero with four ties. Data and security sits near-level, 5.8 to 6.0, one judge leaning Mailjet. Mailjet leads on reliability and accounts, 6.7 to 5.5 with five leans, behind a published 99.99% SLA, and on sovereignty, 7.0 to 6.0 with four leans after its pages state EU storage on Google Cloud in Frankfurt and Saint-Ghislain and a DPA with the 2021 standard contractual clauses. Deliverability and pricing transparency tie, 6.3 versus 6.3 and 5.3 versus 5.3. Weighted totals split: Brevo leads the developer and e-commerce operator, Mailjet the platform engineer, data protection officer and skeptic, and the agency lead is level at 6.3.
Choose Brevo Transactional Email if
You integrate by API and want a documented REST endpoint and SMTP relay with seven official SDKs — six judges lean Brevo on the sending API, zero lean Mailjet (means 7.3 to 6.2).
You send large batches and need batch sending up to 1,000 emails per request, part of the scored sending API detail.
You want a sandbox mode and idempotency keys with a 30-minute window for testing and retried sends.
Your team matches the developer persona (Brevo weighted total 6.3 to Mailjet's 6.2) or the e-commerce operator persona (6.2 to 6.1).
You weigh observability heavily — two judges lean Brevo there, means 6.2 to 5.8, with four ties.
Choose Mailjet Email API if
You need a published 99.99% SLA with 5% credits per thirty minutes capped at 50% of monthly fees — reliability and accounts leans Mailjet five judges to zero with one tie (means 6.7 to 5.5).
Your compliance review wants stated EU storage and processing on Google Cloud in Frankfurt and Saint-Ghislain and a published DPA with the 2021 standard contractual clauses — sovereignty leans Mailjet four judges to zero with two ties (7.0 to 6.0).
You need the stated two regions and six data centres for EU hosting described on the vendor's own pages.
Your team matches the platform engineer, data protection officer or skeptic persona, where Mailjet's weighted totals run 6.3 to 6, 6.3 to 6 and 6.2 to 5.5.
You weigh data and security highly — Mailjet's mean is 6.0 to Brevo's 5.8, with one judge leaning Mailjet and five tied.
Read this comparison as one judge. Each weighs the same scores by what they care about.
The Shop Operator
Runs a Shopware shop for kitchen equipment in Germany and Austria with 900 orders a week. Order confirmations, invoices and shipping notices went out through the hosting provider's mail server until a customer found theirs in spam and the support inbox filled up. Wants guided SPF and DKIM set-up a non-specialist can follow, a plugin for the shop, order mail kept apart from the newsletter, and someone to ask when Gmail starts refusing.
Brevo Transactional Email
This judge's pick
Mailjet Email API
Criterion by criterion
Sending API, SMTP & developer experience
Brevo Transactional Email
The REST API and SMTP relay are documented well enough for my agency to wire order confirmations into the shop: seven official libraries including PHP, batch sending up to 1,000 emails per request, a 25 MB attachment cap, a sandbox mode, idempotency keys with a 30-minute window, and published rate limits with an API playground. The SMTP relay pages are unusually specific about their edges — SMTP keys rather than API keys, non-standard headers only, batch sending reserved for the API. We found no public information on template versioning or an OpenAPI specification, and the named plugins are WordPress, WooCommerce, Shopify, Magento and Zapier, so my Shopware shop would connect through the relay.
Mailjet Email API
We would connect the shop through the documented SMTP relay (ports 25, 465, 587 or 2525 with TLS or SSL) or the REST API, with ready-made libraries for PHP, Ruby, Python, C#, Java and Node.js — PHP being what matters for us. The templating language with variables, loops and conditionals, an endpoint-level API reference, inbound parsing with routing to a callback URL, and scheduling are all documented; we found no public information on a sandbox or test mode, idempotency keys, batch sending, or a Shopware plugin or framework-specific driver.
Deliverability & sender reputation
Brevo Transactional Email
This covers most of my wishlist: SPF, DKIM and DMARC set-up with the DNS records spelled out and endpoints to validate the domain, dedicated IPs with automated warming, automatic suppression of hard bounces and complaints, and transactional mail split from promotional mail by sender and IP address — order confirmations stay clear of the newsletter. A Deliverability Center with a score, recommendations and six months of history, plus a stated team of deliverability experts, gives me somewhere to turn when Gmail starts refusing. We found no public information on a custom return path, how senders on shared IPs are vetted, feedback loops, blocklist monitoring, or a statement on the Gmail and Yahoo bulk-sender requirements.
Mailjet Email API
Guided SPF, DKIM and DMARC set-up with documentation that names the DNS hosts (GoDaddy, 1&1, OVH and the like) is exactly what my non-specialist team needs, backed by a deliverability support team and Technical Account Managers who monitor reputation, avoid blacklists and build a customised IP warm-up plan. Dedicated IPs need around 100,000 emails a month and are warmed gradually, with multiple IPs managed for placement, and the vendor has been a Certified Senders Alliance sender since 2014. Keeping order mail apart from the newsletter is left to us via sending addresses, sub-accounts or custom headers rather than enforced separate streams, and we found no public information on stated compliance with the Gmail and Yahoo bulk-sender rules, published delivery times, or feedback loops.
Message logs, events & webhooks
Brevo Transactional Email
I can trace any order mail afterwards: event logs searchable by message ID, recipient or subject, webhook events for delivered, bounced, opened, clicked and marked spam with the bounce reason, the clicked link and the device, plus an events page with export and webhook failure alerts, and retention rules are configurable. The captured pages give different figures for how long logs are kept — indefinitely on one, unlimited on the pricing page, deletion at least every 24 months in the terms. We found no public information on webhook signatures, retry schedules or read-only access for support staff.
Mailjet Email API
Detailed message logs with status history, webhooks that push opens, clicks, bounces and blocks per event type in real time, and the option to pull aggregated events or stream them into Amazon SQS or Google Pub/Sub cover the basics of what my team must see once the shop hands a mail over. We found no public information on how long logs and message content are kept, on webhook signatures and retry schedules, on viewing the receiving server's raw answer per send, or on read-only access for support staff without developer rights.
Message data, retention & security
Brevo Transactional Email
Two-factor authentication, IP allow-listing with CIDR ranges that rejects requests even with a valid key, ISO 27001:2022, a published data processing agreement, per-message tracking-pixel removal and documented deletion and export cover what my customer data needs on paper. The point I would take to our data protection officer: the terms state Brevo may use content and usage data to enrich and train its AI features, and order mails carry customer names and addresses. We found no public information on scoped API keys, an audit log or a vulnerability disclosure programme.
Mailjet Email API
Message content is stored in encrypted form, encryption at rest is AES256 minimum with TLS 1.2 or higher in transit, ISO 27001 and 27701 plus SOC 2 certifications and a HackerOne bug bounty are stated, and open and click tracking can be decoupled from individuals through anonymous tracking and recipient-set tracking consent — a real plus for our German and Austrian customers.
Reliability, accounts & support
Brevo Transactional Email
There is a public status page, a service level agreement in the terms of service with 99.9% uptime, backups across three geographically distinct servers, multi-user seats, and email support on every plan with phone support higher up. Sub-account management sits in the Enterprise plan, and we found no public information on support response times per plan or how mail is queued during an outage. The named plugins cover WordPress, WooCommerce, Shopify, Magento and Zapier; my Shopware shop would rely on the SMTP relay, which works with any platform that supports it.
Mailjet Email API
A published 99.99% SLA covering API, SMTP and outbound delivery, with credits of 5% of the monthly fee per 30 minutes of downtime capped at half the monthly fee, plus mail queuing on fully redundant hardware and sub-accounts and team permissions, gives us something to hold on to; priority support sits on the Premium plan and tickets go through the control panel. The gaps matter for us: we found no plugin or guide for Shopware or any other shop platform in the captured pages (only MTAs like Postfix, Exim and Exchange are named), the stated phone support hours cover the Americas and Australia, and we found no public information on support response times per plan or on incident history on the status page.
European sovereignty
Brevo Transactional Email
Brevo is a French simplified joint-stock company in Paris with an EU VAT number, states hosting in France and Germany on EU-based servers, publishes a data processing agreement with a subprocessor list, and carries ISO 27001:2022 — a workable starting position for my German and Austrian shops. The chain is not proven end to end: the privacy policy discloses transfers to the United States and India, the legal notice names the US hosts Kinsta and Vercel, and named subprocessors such as OpenAI and the payment providers appear without their locations.
Mailjet Email API
Mailjet SAS in Paris under Sweden's Sinch, with customer data stored and processed in Google Cloud data centres in Frankfurt and Saint-Ghislain in Belgium across six EU data centres, encrypted backups in geographically separated environments within the EU, and a published data processing agreement with standard contractual clauses — a strong starting point for our German and Austrian shop. The sub-processor list is referenced by URL but we found no locations for the sub-processors, the privacy notice names hosting partners including AWS, MacStadium and Rackspace without locations, and the terms acknowledge group companies may sit outside the chosen jurisdiction, with US-based Mailgun covered by the EU-US Data Privacy Framework.
Pricing transparency
Brevo Transactional Email
The free plan of 300 emails per day, Starter at €7 per month with 5,000 emails, and Professional at €499 per month with 150,000 emails are public, prices are stated exclusive of VAT, and renewal and cancellation terms are in the terms of service. I still cannot compute my annual cost: the pay-as-you-go credit price, the dedicated IP price and any overage rate are not stated, and my order-mail volume sits above the Starter allowance. The pages describe credit pricing only as "price based on number of emails."
Mailjet Email API
The free tier ($0/month, 6,000 emails/month, 200 a day) and the paid tiers ($9, $19 and $29 per month with their volumes) are public, prices exclude VAT and are subject to French VAT with an EU exemption via an intra-Community VAT number, there are no setup fees, the monthly term renews with 30 days' notice, unused credits do not roll over, and overage is billed per additional 1,000 emails. Dedicated IPs are offered on Premium and Custom plans upon request subject to compliance verification with no price shown, and we found no public information on the cost of longer log retention or separately priced support plans.
Sovereignty, side by side
Dimension
Brevo Transactional Email
Mailjet Email API
Legal entity
Not determined
Not determined
Hosting location
Not determined
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Hosting options
Not determined
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Open source
Not determined
Not determined
Data processing agreement
Not determined
Not determined
Transfer impact assessment
Not determined
Not determined
Facts, side by side
Only facts both products carry under the same definition — anything else would not be a fair row.
Questions about Brevo Transactional Email and Mailjet Email API
Which is better, Brevo Transactional Email or Mailjet Email API?
As of 1 Nov 2026, the panel rates both 3/5. Weighted by what each judge cares about, 2 of the 6 judges pick Brevo Transactional Email and 3 pick Mailjet Email API, 1 calls it a tie. Which one fits depends on the criteria that matter to you; the table on this page shows both side by side, and each judge’s reading has its own page. Both were scored by the same AI bench under the same rubric, from public evidence only, as the methodology describes.
Is Brevo Transactional Email or Mailjet Email API European?
Brevo Transactional Email is European (EU-Made). Mailjet Email API is European (EU-Made). Provenance is read from each company’s own legal pages: who builds it and who owns it.
Where do Brevo Transactional Email and Mailjet Email API store customer data?
Per the vendors’ own pages as captured — Brevo Transactional Email: Default not stated; pages mention France and Germany. Mailjet Email API: Default not stated; pages mention United States, Europe and the EU.
Do Brevo Transactional Email and Mailjet Email API have a free plan?
As of 1 Nov 2026, both vendors’ own pages state a free plan. Each product page links the pricing page it was read from.