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 Platform Engineer
Platform engineer at a fintech in Frankfurt whose customers sign in with a one-time code sent by email, so a delay of three minutes is an outage. Is on call for it. Reads the status page history before the feature list, wants the SLA in writing with credits, mail queued and retried during an incident, delivery latency per mailbox provider, alerts on bounce spikes, and scoped API keys that can be rotated without a deploy.
Brevo Transactional Email
Mailjet Email API
This judge's pick
Criterion by criterion
Sending API, SMTP & developer experience
Brevo Transactional Email
The REST API and SMTP relay are documented to a level I could build on: seven official SDKs, batch sending up to 1,000 messages per request, scheduled sending, idempotency with a 30-minute TTL, a sandbox mode, inbound parsing, and rate limits of 1,000 requests per second stated by plan. What keeps it off the top of the scale: the SMTP relay is documented as not supporting batch sending, and we found no public information on a versioning or deprecation policy or an OpenAPI specification.
Mailjet Email API
The sending path is well documented: REST endpoints and an SMTP relay on ports 25, 465, 587 and 2525 with TLS or SSL, ready-made libraries for PHP, Ruby, Python, C#, Java and Node.js, a templating language with variables, loops, conditionals and functions, scheduled sending, a 25MB message size limit in the terms, and an inbound Parse API that parses headers, content and attachments to a callback URL, backed by endpoint-level API reference documentation. I found no public information on idempotency keys, a sandbox or test mode, or per-account sending limits — the only throughput figure is an infrastructure ceiling of 15M emails per hour per user.
Deliverability & sender reputation
Brevo Transactional Email
Domain authentication for SPF, DKIM and DMARC is documented down to the DNS records and endpoints, dedicated IPs with automated warming ship on Professional and Enterprise, transactional and marketing mail are split by sender and IP, and hard bounces are pooled into automatic suppressions, backed by a Deliverability Center with a score and six months of history. Delivery speed is published only in aggregate (99.98% of SMTP mail under 20 seconds), and we found no public information on feedback loops, blocklist monitoring, or delivery figures per mailbox provider — the number I would page on.
Mailjet Email API
Guided SPF, DKIM and DMARC set-up with DNS instructions, dedicated IPs with a gradual warm-up plan and multiples managed per IP, deliverability specialists and consulting calls, blocklist monitoring, and CSA certification since 2014 are all on record. Separation of transactional and marketing traffic is described as something customers arrange themselves with different sending addresses or sub-accounts rather than enforced streams, and I found no public information on shared-pool vetting, feedback loops with mailbox providers, or published delivery times — which is what I would want before routing login codes through them.
Message logs, events & webhooks
Brevo Transactional Email
Every message is searchable by message ID, recipient or subject with the full technical history from API request to inbox, the webhook payloads carry the deferred reason, the clicked link, device and user agent, and events can be exported. For the on-call side we found no public information on webhook signing, retry schedules, or alerts when bounces spike; the captured pages also give different figures for how long logs are kept (indefinite versus deletion within 24 months).
Mailjet Email API
Every message carries detailed logs and status history, webhooks push opens, clicks, bounces and blocks in real time and can alert as those events occur, and events can be pulled or streamed into Amazon SQS or Google Pub/Sub with real-time statistics behind them. I found no public information on how long logs are kept, whether webhooks are signed and retried, or the raw SMTP answer per message, so incident forensics would rest on the dashboards and the event stream alone.
Message data, retention & security
Brevo Transactional Email
IP allow-listing is genuinely strong — CIDR ranges, blocking unknown addresses even when the key is valid — alongside MFA, ISO 27001:2022, per-message tracking-pixel removal, configurable log retention rules and erasure within 30 days on request. But the terms state Brevo may use content and usage data to enrich and train its AI features, and we found no public information on scoped API keys, an audit log or a vulnerability disclosure programme.
Mailjet Email API
The posture is stated clearly — AES256 at rest, TLS 1.2 or higher in transit, message content stored encrypted, ISO 27001, ISO 27701 and SOC 2, annual independent penetration tests and a HackerOne bug bounty — and open and click tracking can be decoupled via anonymous tracking and recipient tracking consent, with personal data deleted within ninety days of termination.
Reliability, accounts & support
Brevo Transactional Email
There is a public status page, an SLA published as an appendix to the terms, backups across three geographically distinct servers, seats on paid plans, official plugins for WordPress, WooCommerce, Shopify and Magento, and named migrations from Mailchimp and Klaviyo. But we found no public information on service credits, mail queueing and retry during incidents, per-plan response times or granular roles — exactly the items I need in writing before routing login codes through a provider.
Mailjet Email API
They meet an on-call engineer's basic demands in writing: a 99.99% SLA covering the API, SMTP and outbound delivery with a 5% credit per thirty minutes of downtime capped at 50% of the monthly fee, interruptions notified via a status page, all mail queued when servers hit problems, fully redundant hardware, and resources across two regions and six European data centres. Sub-accounts, multiple users with advanced permissions, a support ticket system with published phone hours, and sending through Postfix, Exim or Exchange round it out. I found no public information on published incident history, post-mortems, per-plan response times or migration help — and the SLA covers availability, not the delivery latency my one-time codes live or die by.
European sovereignty
Brevo Transactional Email
The contracting entity is Brevo SAS in Paris with a trade-register number, hosting is described as France and Germany on EU-based servers, a data processing agreement is published with the subprocessors listed in it, and ISO 27001 is stated. The captured pages give a mixed picture beyond that: the privacy policy names transfers to the United States and India, the legal notice lists US hosts (Kinsta and Vercel), and we found no public information on subprocessor locations or exactly what the EU region covers.
Mailjet Email API
Mailjet SAS in Paris with French law and Paris courts is the contracting route, hosting is described as Google Cloud data centres in Frankfurt and Saint-Ghislain with storage and processing in the EU across two regions and six data centres, a data processing agreement with standard contractual clauses is published, and ISO 27001, ISO 27701 and SOC 2 are stated. The privacy policy, though, describes operating the platform through Google Cloud Platform, AWS, MacStadium and Rackspace with a United States region option, and names engagement and payment providers such as Zendesk, Salesforce, Snowflake, Stripe and Authorize.net; a sub-processor list is published at its own address, and on the pages I read the locations of the named providers are not stated.
Pricing transparency
Brevo Transactional Email
The tiers are public with their volumes — free at 300 emails a day, Starter at €7 per month for 5,000 emails, Standard at €15, Professional at €499 for 150,000 — with VAT treatment, billing periods, notice periods and cancellation terms stated, and one add-on priced (branding removal at €8.10 per month). But we found no public information on the rate for emails beyond plan volume or the price of a dedicated IP, and Enterprise is a custom price, so I cannot compute a full annual cost from public pages.
Mailjet Email API
Four tiers are public with volumes — free at $0 for 6,000 emails a month and 200 a day, Starter at $9/month for 8,000, Essential at $19/month for 15,000, Premium at $29/month for 15,000 — with contact limits, per-tier extras, credits that do not roll over, monthly terms with thirty-day notice, and prices excluding French VAT with an EU VAT-number exemption. Dedicated IPs are available on Premium and Custom plans subject to compliance verification and I found no public information on their price, the Custom plan is on request, and the pages I read state that overage is billed per additional 1,000 emails without stating the rate. Enough to budget a low-volume year, not enough to compute one at scale without talking to sales.
Sovereignty, side by side
Dimension
Brevo Transactional Email
Mailjet Email API
Legal entity
Not determined
Not determined
Hosting location
Not determined
Not determined
Hosting options
Not determined
Not determined
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.