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 Skeptic
Has seen "99% deliverability" with no method behind it, "dedicated IPs" that shared a pool with bulk senders, "EU hosting" that covered the API endpoint but not the logs, and seven days of log retention discovered during an incident on day eight. Reads that a vendor is "trusted by thousands of developers" and asks how bounces are suppressed, what is stored per message, which entity signs the DPA — and what moving away would cost.
Brevo Transactional Email
Mailjet Email API
This judge's pick
Criterion by criterion
Sending API, SMTP & developer experience
Brevo Transactional Email
A REST endpoint, an SMTP relay with its ports and key type spelled out, seven official SDKs named, batch sends up to 1,000 recipients, attachments by URL or base64, idempotency keys with a 30-minute window, scheduled sending, inbound parsing, and rate limits per plan — the sending side is documented well beyond basics, with a live API playground to test endpoints. What keeps it out of the top band is what we found no public information on: an OpenAPI specification or official CLI, framework drivers the vendor maintains itself, and template versioning.
Mailjet Email API
Sending works by REST API or SMTP relay on ports 25, 465, 587 and 2525 with TLS or SSL, official libraries for PHP, Ruby, Python, C#, Java and Node.js, an endpoint-level API reference for all APIs, a templating language with variables, loops and conditionals, and inbound mail parsed by the Parse API and routed to a callback URL. Scheduling is mentioned in a single line. We found no public information on a sandbox or test mode, idempotency keys, batch sending, or per-account rate limits — the 15 million emails per hour figure is an infrastructure capacity claim, not a customer limit.
Deliverability & sender reputation
Brevo Transactional Email
Domain authentication covers SPF, DKIM and DMARC with the DNS records and API endpoints to validate them, transactional and marketing mail can be split into different streams, hard bounces are pooled into automatic suppressions, dedicated IPs come with automated warming, and a Deliverability Center scores performance over six months of history. The "99%" deliverability and inbox-placement figures arrive with no method attached, and we found no public information on feedback loops, blocklist monitoring, DMARC reports, or stated compliance with the Gmail and Yahoo bulk-sender rules.
Mailjet Email API
Authentication is documented properly — SPF, DKIM and DMARC records with DNS set-up guidance, and it is stated plainly that free webmail domains cannot be authenticated — while dedicated IPs come on Premium and Custom plans with a warm-up the support team runs with you, multiple IPs with volume spread across them, blocklist monitoring and deliverability experts on the top tiers, and CSA sender certification since 2014. Spam-marked addresses are removed from lists automatically, per a customer's own account. What tempers it: the platform sells marketing and transactional mail from one product and the guidance says "most customers" separate the streams themselves with different sending addresses and sub-accounts, and we found no public information on shared-pool vetting, feedback loops, or any published delivery or inbox-placement figures with their method.
Message logs, events & webhooks
Brevo Transactional Email
Message logs are searchable by message ID, recipient and subject, an events page supports view, search, filter and export, and the webhook taxonomy is documented down to payload fields like the bounce reason, the clicked link, and a preview link into the UI logs. The captured pages give different figures for how long logs are kept — indefinitely on one product page, deletion at least every 24 months in the terms — and we found no public information on webhook signatures, retry schedules, or alerts on bounce and complaint spikes.
Mailjet Email API
Every message has "detailed logs and status history", opens, clicks, bounces and blocks are tracked in real time, webhooks push events configurable per event type through the API or the interface, and events can be pulled as aggregated data or streamed into Amazon SQS or Google Pub/Sub. The interfaces to search event data, suppressions and retrieve message content tell me content is stored per send. We found no public information on how long logs or message content are kept — my day-eight question — nor on webhook signatures, retry schedules, or the receiving server's answer on a bounce.
Message data, retention & security
Brevo Transactional Email
Retention periods are published item by item, contact deletion erases personal data with a 30-day completion promise, tracking pixels can be removed per message, IP allow-listing and multi-factor authentication are documented, and ISO 27001:2022 is claimed. Points off: the terms state Brevo may use Content and Usage Data to enrich and train its AI features — against logs that store complete message content — unencrypted ports 587 and 2525 make TLS optional, and we found no public information on scoped API keys, an audit log, or the certification's scope.
Mailjet Email API
Stored data is enumerated — name, email, telephone numbers, IP address, contact-list data, message or call content — with message content stored encrypted, AES256 at rest, TLS 1.2 or higher in transit, ISO 27001 and ISO 27701 certification, SOC 2 compliance, a HackerOne bug bounty, an annual independent penetration test, and a DPA under which all personal data is deleted within ninety days of termination. We found no public information on two-factor authentication, scoped API keys, IP allow-listing, SSO, an audit log, or a setting to shorten retention.
Reliability, accounts & support
Brevo Transactional Email
A public status page exists at status.brevo.com, backups run across three geographically distinct servers, an SLA appendix is part of the terms, and plugins or guides cover WordPress, WooCommerce, Shopify, Magento, Zapier and Supabase. Sub-account management sits behind the Enterprise plan, seats rather than roles are what is published, and we found no public information on incident history, service credits, support response times by plan, or mail queueing during outages.
Mailjet Email API
The SLA is unusually concrete: 99.99% availability for the API, SMTP and outbound delivery in a monthly period excluding maintenance, credits of 5% of the monthly fee per thirty minutes of downtime capped at 50%, a thirty-day claim window, interruptions notified on a status page, mail queued through server problems on fully redundant hardware, and sub-accounts from one on Starter to a custom number on Custom, with priority support on Premium. Note the marketing pages give a different uptime figure, 99.9%, and the terms state delivery itself is only commercially reasonable efforts — so the guarantee covers availability, not delivery. We found no public information on status-page incident history, support response times per plan, or migration assistance.
European sovereignty
Brevo Transactional Email
Brevo is a French company registered in Paris and its pages claim EU hosting in France and Germany, with a data processing agreement published as an appendix to the terms and subprocessors listed within it — but the privacy policy itself says personal data may be transferred to the United States of America and India, the controller for some customers is Brevo Inc., and the legal notice names hosts at California addresses. We found no public information on subprocessor locations, so the EU claim cannot be traced end to end through sending, logging, support and payment.
Mailjet Email API
Mailjet SAS contracts under French law before Paris courts, the platform runs on named Google Cloud data centres in Frankfurt and Saint-Ghislain with encrypted daily backups kept in geographically separated environments within the EU, and a DPA is published with standard contractual clauses, Swedish law and the Swedish authority for those clauses, plus a subprocessor-list link. The chain is not European end to end: payments run through Stripe, Chargify, Aria and Authorize.net, support tooling through Zendesk, Salesforce and Gainsight, support desks sit in Atlanta and Melbourne, Mailgun Technologies is certified under the EU-US Data Privacy Framework, and the terms acknowledge affiliates and subcontractors may be based outside the chosen storage jurisdiction. The captured pages also give different statements on hosting — one says EU-only data centres, another describes data centres throughout the United States or Europe — and subprocessor locations themselves are not shown.
Pricing transparency
Brevo Transactional Email
Every tier is published with its volume and price in euros and dollars, VAT treatment, the annual discount and the cancellation and notice periods are in the terms, and the free tier's 300-emails-a-day limit requires no card. But we found no public information on the price of additional emails beyond a tier's volume, on dedicated IP pricing, or on support response times by plan — the numbers that decide a real annual bill.
Mailjet Email API
Tiers are public with volumes and prices: Free $0/month for 6,000 emails/month with 200 emails per day, Starter $9/month for 8,000 emails/month, Essential $19/month for 15,000 emails/month and Premium $29/month for 15,000 emails/month, with no setup fees, monthly terms with thirty days' non-renewal notice, no rollover of unused credits, and VAT stated as excluded and subject to French VAT with an EU exemption on an intra-Community VAT number. The overage is named — billed per 1,000 emails beyond the plan limit — but no figure for it is captured, and dedicated IPs are available on Premium and Custom plans "subject to compliance verification" without a price. We found no public information on what longer log retention, SSO or support plans cost, so a buyer cannot compute the real annual cost from public pages alone.
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.