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 Agency Lead
Technical lead at a web agency in Cologne that builds and runs thirty client applications, from a booking portal to a membership site, each sending its own mail from the client's domain. Wants one account with a sub-account, keys and limits per client, domains verified by API, roles so a client can see their own logs and nothing else, and a price per client that can be written into a maintenance contract.
Brevo Transactional Email
Mailjet Email API
This judge calls it a tie.
Criterion by criterion
Sending API, SMTP & developer experience
Brevo Transactional Email
A documented REST API and SMTP relay with official SDKs for all seven named languages, batch sending up to 1,000 messages per request, attachments, templates with variables and API template creation, idempotency keys, scheduled sending, a sandbox mode, inbound parsing, stated rate limits, and domain verification and validation by API — which is exactly how I would onboard thirty client domains.
Mailjet Email API
A documented REST API and 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, a templating language with variables, loops and conditionals, scheduled sending and inbound parsing to a callback URL cover the languages our client stack runs on. We found no public information on idempotency keys, a sandbox mode, an OpenAPI specification or migration guides, which keeps it below the top level.
Deliverability & sender reputation
Brevo Transactional Email
SPF, DKIM and DMARC are set up through published DNS records with three verification routes, transactional and marketing mail are split by stream and IP, dedicated IPs come with automated warming on Professional and Enterprise, hard bounces and complaints are suppressed automatically, and a Deliverability Center shows a score with six months of history alongside published delivery-speed figures and access to deliverability specialists. We found no public information on feedback loops, blocklist monitoring, DMARC reports, custom return paths, or a stated position on the Gmail and Yahoo bulk-sender requirements.
Mailjet Email API
Guided SPF, DKIM and DMARC set-up with documentation, dedicated IPs warmed up from a neutral reputation under a customized plan, multiple dedicated IPs with Mailjet managing volume per IP, automatic removal of addresses that mark mail as spam, CSA certification since 2014 and named deliverability experts and consulting are all published. We found no public information on shared-IP vetting, feedback loops, Gmail and Yahoo bulk-sender compliance statements, custom tracking domains or published delivery times, so the verification layer is missing.
Message logs, events & webhooks
Brevo Transactional Email
Every message is searchable by message ID, recipient or subject with the technical history from API request to delivery, and the webhook payloads carry the full event set with bounce reasons, device and link fields plus a mirror link into the dashboard logs; webhooks can be created and updated via the API, with failure alerts and event export. The captured pages give different figures for log retention — the product pages describe indefinite transactional logs while the terms state deletion at least every 24 months — and we found no public information on webhook signatures and retry schedules, raw SMTP responses, read-only roles for support staff, or bounce and complaint spike alerts.
Mailjet Email API
"Track every message with detailed logs and status history", real-time webhooks for opens, clicks, bounces and blocks configurable per event type by API or interface, a pull option for aggregated event data plus push into Amazon SQS or Google Pub/Sub, and real-time statistics dashboards give our team enough to debug a client send. We found no public information on log retention, webhook signing or retry schedules, the raw SMTP response per message or read-only roles for support staff, and activity logs are only listed on the Custom plan.
Message data, retention & security
Brevo Transactional Email
ISO 27001:2022, multi-factor authentication and IP allow-listing down to CIDR ranges — with unknown IPs blocked even when the key is valid — sit beside per-message tracking-pixel removal, published and configurable retention periods, GDPR deletion tools and a data processing agreement. We found no public information on scoped API keys, an audit log, or an option to enforce TLS per domain, and the terms state Brevo may use content and usage data to enrich and train its AI features, which I would have to clear with clients before routing their transactional mail here.
Mailjet Email API
Encryption at rest (AES256 minimum) and in transit (TLS 1.2 or higher), message content stored encrypted, ISO 27001, ISO 27701 and SOC 2, a published DPA with the 2021 standard contractual clauses, deletion within ninety days of termination, a HackerOne bug-bounty programme, anonymous tracking and recipient tracking consent are stated.
Reliability, accounts & support
Brevo Transactional Email
There is a public status page, a service level agreement appendix in the terms with 99.9% uptime, ten seats and phone support on Professional, backups across three geographically separate servers, and plugins for WordPress, Shopify, WooCommerce and Magento plus a Supabase integration. Sub-account management is an Enterprise feature at a custom price, which pushes my per-client separation out of any contract I could price on paper, and we found no public information on incident history, service credits, queueing during outages, granular roles, or per-plan response times.
Mailjet Email API
A published 99.99% SLA with 5% credit per 30 minutes of downtime capped at 50%, status-page notifications, mail queueing on fully redundant hardware across two EU regions and six data centres, sub-accounts (one on Starter, a custom number on Custom) and advanced permissions on higher plans give me much of the multi-tenant picture I need for thirty clients. We found no public information on incident history, sub-account keys and limits manageable by API, support response times per plan, migration help or plugins for platforms like WordPress or Shopify, and support hours are published only as phone lines for the Americas and Australia.
European sovereignty
Brevo Transactional Email
The contracting entity is Brevo SAS in Paris, data hosting is stated as France and Germany on EU-based servers with backups across three geographically separate servers, the data processing agreement is published as an appendix, subprocessors are listed in it, and ISO 27001:2022 is stated. The privacy policy itself says personal data may be transferred to the United States and India, the legal notice names hosts in California, and subprocessor locations along the sending chain are not shown on the captured pages — for my Cologne clients I would want that list before signing.
Mailjet Email API
Mailjet SAS in Paris under parent Sinch AB in Stockholm, data stored and processed on named Google Cloud Platform regions in Frankfurt and Saint-Ghislain, daily encrypted backups in geographically separated EU environments, and a published DPA with Swedish governing law and the Swedish supervisory authority are workable for German client contracts. Subprocessors such as Stripe, Salesforce, Zendesk and Google Analytics are listed by name but without locations, the terms route through US-based Mailgun entities certified under the EU-US Data Privacy Framework with acknowledged global intra-group transfers, and Sinch claims an independent-controller role over email transmission, so the end of the chain is not fully evidenced.
Pricing transparency
Brevo Transactional Email
The free tier (300 emails per day, forever, no credit card) and paid tiers from €7 per month for 5,000 emails up to €499 per month for 150,000 are public, with a 10% yearly discount, pay-as-you-go credits that do not expire, and VAT treatment plus notice periods stated in the terms. The pieces I need to compute a per-client cost in a maintenance contract are the gaps: we found no public information on the price per additional thousand emails, a dedicated IP, longer log retention, SSO or sub-accounts, with Enterprise at a custom price.
Mailjet Email API
Tier prices are public — Free at $0/month with 6,000 emails/month and 200 per day, Starter $9/month for 8,000, Essential $19/month and Premium $29/month for 15,000 each — with no setup fees, a one-month self-service term, no credit rollover and VAT treatment stated (prices exclude French VAT; EU companies can be exempt with an intra-Community VAT number). The captured pages give no figure for the per-additional-1,000-email rate, dedicated IPs are "upon request" and "subject to compliance verification" rather than priced, and we found no public pricing for extra sub-accounts, SSO, longer log retention or support levels, so I cannot compute a per-client price for a maintenance contract from these 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.