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 Data Protection Officer
In-house data protection officer at a health software company whose appointment reminders and lab-result notices carry patients' names. Treats the sending service as a processor like any other. Reads the DPA, the subprocessor list and the retention section first: whether message bodies are stored and for how long, whether open tracking can be turned off, which entity signs, and whether the EU region covers the logs as well as the mail.
Brevo Transactional Email
Mailjet Email API
This judge's pick
Criterion by criterion
Sending API, SMTP & developer experience
Brevo Transactional Email
Sending is documented to a level my developers could build on: a REST endpoint and SMTP relay with ports, rate limits and attachment size stated, official libraries for PHP, Python, Node.js, Ruby, Go, Java and C#, idempotency keys, scheduled sending, a sandbox mode, inbound parsing of replies and an API playground for live test calls. The SMTP documentation itself states batch sending is not supported on the relay and scheduling there is in public beta, and we found no public information on an OpenAPI specification, a command-line tool, or template versioning.
Mailjet Email API
The developer pages document the SMTP relay and REST endpoints with ready-to-go libraries for PHP, Ruby, Python, C#, Java and Node.js, a template language with variables, loops and conditionals, scheduled sending, and a Parse API that delivers inbound mail with headers, content and attachments to a callback URL, backed by an endpoint-level API reference. We found no public information on batch sending, a sandbox or test mode, or idempotency keys.
Deliverability & sender reputation
Brevo Transactional Email
SPF, DKIM and DMARC set-up is documented with three verification routes, dedicated IPs come with automated warming, hard bounces are pooled and suppressed automatically, transactional and promotional mail are split by sender and IP, and delivery times plus a 99% inbox-placement figure are published. We found no public information on how senders on shared pools are vetted, on feedback loops, blocklist or DMARC monitoring, or on a stated position on the Gmail and Yahoo bulk-sender rules.
Mailjet Email API
SPF, DKIM and DMARC set-up is documented step by step for domains you own, dedicated IPs arrive with a neutral reputation and a supported warm-up plan with multiple IPs managed for you, and addresses marked as spam are suppressed automatically, with deliverability specialists, consulting calls and blocklist monitoring behind it and CSA certification since 2014 claimed. We found no public information on shared-pool vetting, feedback loops, DMARC reports, the Gmail and Yahoo sender requirements, or published delivery times.
Message logs, events & webhooks
Brevo Transactional Email
The event logs search every message by message ID, recipient or subject, webhooks carry the full transactional event set including the bounce reason, the device and the clicked link, events can be filtered and exported from a dedicated logs page, and failed webhook deliveries raise alerts. The captured pages give different figures for log retention — indefinite and unlimited on product pages, deletion at least every 24 months in the terms — which is precisely the question a processor should answer once, and we found no public information on webhook signatures or retry schedules.
Mailjet Email API
Every message is tracked with detailed logs and status history, opens, clicks, bounces and blocks are pushed in real time by webhook or pulled on demand, and events can be streamed into Amazon SQS or Google Pub/Sub with endpoints configurable per event type. For retention, the privacy notice gives thirty days for event timestamps and counts with email addresses held one-way encrypted. We found no public information on webhook signatures and retry schedules, the remote server's bounce answer per message, or configurable log retention.
Message data, retention & security
Brevo Transactional Email
Open and click tracking can be removed per message, multi-factor authentication, IP allow-listing that rejects requests even with a valid key, SSO with SAML on the Enterprise plan and an ISO 27001:2022 certificate are stated, with a data processing agreement published in the terms. Message content sits in searchable logs with configurable retention, but the captured pages give different retention figures, and we found no public information on an audit log, encryption at rest for message bodies, or recipient deletion by API; the terms also state the service was not designed for GDPR Article 9 sensitive data, which any health sender must weigh before signing.
Mailjet Email API
The data processing agreement states message content is stored encrypted, AES256 minimum at rest and TLS 1.2 or higher in transit, open and click tracking can be disconnected from individuals or governed by recipient consent, and APIs exist to search event data and retrieve message content for data subject requests, with ISO 27001, ISO 27701 and SOC 2 stated, an annual penetration test, a HackerOne bounty and HIPAA-ready configurations on request. We found no public information on two-factor authentication, SSO, scoped API keys, IP allow-listing, or configurable message-content retention.
Reliability, accounts & support
Brevo Transactional Email
A public status page, a service level agreement published as an appendix to the terms at 99.9% uptime, backups across three geographically distinct servers, Enterprise sub-accounts with tailored onboarding, multi-user seats on the Professional plan, and official plugins for WordPress, Shopify, WooCommerce, Magento, Zapier and Supabase are all documented. We found no public information on service credits, support response times per plan, or how mail is queued and retried during an outage.
Mailjet Email API
A published SLA guarantees 99.99% availability for the API, SMTP and outbound delivery with 5% credits per thirty minutes capped at 50% of monthly fees, interruptions are notified on a status page, and mail is queued on fully redundant hardware with a disaster recovery protocol and daily encrypted EU backups. Sub-accounts, advanced permissions, a priority support tier, telephone support with stated hours for the Americas and APAC, a technical account manager and tailored onboarding for complex senders are all described. We found no public information on published incident history, support response times per plan, or sub-account management by API.
European sovereignty
Brevo Transactional Email
Brevo is a French simplified joint-stock company registered in Paris, the sending service is described as hosted on EU servers in France and Germany with all data hosted in the EU, and a data processing agreement lists every subprocessor. The privacy policy itself records that personal data may be transferred to the United States and India, and the captured pages name subprocessors such as OpenAI and several payment providers without stating their locations — so the European cover for the mail is stated, but the whole chain is not evidenced end to end.
Mailjet Email API
Mailjet SAS signs under French law before Paris courts, message data is stated to be stored and processed on Google Cloud in Frankfurt and Saint-Ghislain across two EU regions and six data centres with no transfers between regions, and the published DPA incorporates the 2021 standard contractual clauses under Swedish law with the Swedish authority IMY named. The wider chain is not European end to end: the privacy notice lists AWS, MacStadium and Rackspace among the hosting third parties and US providers such as Salesforce, Zendesk and Stripe for support and payment, the terms say affiliates and subcontractors may sit outside the chosen storage jurisdiction, and Sinch Email operates under the EU-US Data Privacy Framework. The sub-processor list is published by URL, but the captured pages do not state each subprocessor's location.
Pricing transparency
Brevo Transactional Email
Every plan is priced publicly with its volume — free at 300 emails a day, Starter at €7 a month from 5,000 emails, Standard at €15, Professional at €499 from 150,000 — with pay-as-you-go credits that do not expire, VAT treatment, payment methods and cancellation terms stated. Dedicated IP addresses carry no published price, the Enterprise plan is custom-priced, and we found no public information on the per-thousand cost of additional emails, so a full annual cost cannot be computed from the public pages.
Mailjet Email API
Four tiers are public — free at $0 for 6,000 emails a month with a 200-per-day cap, $9 for 8,000, and $19 and $29 for 15,000 — with no setup fee, monthly terms, cancellation at any time, no credit rollover, and VAT stated as French VAT with an intra-Community exemption for EU companies. Overage is billed per additional 1,000 emails, but the captured pages do not show the amount, and dedicated IPs are limited to Premium and Custom plans without a stated price. We found no public information on the cost of longer log retention, extra sub-accounts, SSO or support plans.
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.