Transactional Email · head-to-head
Brevo Transactional Email vs Mailjet Email API
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.
The short answer
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 bench's picks
Same scores, different priorities: each judge's weighting applied to both products. The split is the finding.
- The SaaS Developer Brevo Transactional Email Mailjet Email API picks Brevo Transactional Email
- The Platform Engineer Brevo Transactional Email Mailjet Email API picks Mailjet Email API
- The Shop Operator Brevo Transactional Email Mailjet Email API picks Brevo Transactional Email
- The Data Protection Officer Brevo Transactional Email Mailjet Email API picks Mailjet Email API
- The Agency Lead Brevo Transactional Email Mailjet Email API tie
- The Skeptic Brevo Transactional Email Mailjet Email API picks Mailjet Email API
Criterion by criterion
| Criterion | Brevo Transactional Email | Mailjet Email API |
|---|---|---|
| Sending API, SMTP & developer experience | 3.5 of 5 | 3 of 5 |
| Deliverability & sender reputation | 3 of 5 | 3 of 5 |
| Message logs, events & webhooks | 3 of 5 | 3 of 5 |
| Message data, retention & security | 3 of 5 | 3 of 5 |
| Reliability, accounts & support | 3 of 5 | 3.5 of 5 |
| European sovereignty | 3 of 5 | 3.5 of 5 |
| Pricing transparency | 2.5 of 5 | 2.5 of 5 |
| Criterion | Brevo Transactional Email | Mailjet Email API | The bench leans |
|---|---|---|---|
| Sending API, SMTP & developer experience | Brevo Transactional Email, 6 of 6 judges | ||
| Deliverability & sender reputation | split 0–0 | ||
| Message logs, events & webhooks | Brevo Transactional Email, 2 of 6 judges | ||
| Message data, retention & security | Mailjet Email API, 1 of 6 judges | ||
| Reliability, accounts & support | Mailjet Email API, 5 of 6 judges | ||
| European sovereignty | Mailjet Email API, 4 of 6 judges | ||
| Pricing transparency | split 0–0 |
Stars show the bench average per criterion; the lean counts which product each judge scored higher. Open a judge's tab for their reasoning on both sides.
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.
| Compliance · Certifications | yes · yes · yes · yes1 | yes · yes · EU-based data centers · yes · yes2 |
|---|---|---|
| Compliance · DPA available | yes3 | Standard-AVV (Auftragsverarbeitungsvertrag) · yes4 |
| Compliance · Dpf certification | yes · EU-U.S. Data Privacy Framework · UK · Swiss · U.S. Department of Commerce3 | yes · yes5 |
| Compliance · ISO 27001 | yes · ISO 27001:20226 | yes7 |
| Compliance · ISO 27001 | yes · ISO 27001:2022 · yes8 | yes · yes9 |
| Hosting · Data residency | France · Germany · yes1 | EU · 2 · 69 |
| Hosting · Providers | Kinsta Inc · Vercel Inc.10 | Google Cloud Platform · AWS · MacStadium · Rackspace5 |
| Integrations · API languages | PHP · Node · Python11 | PHP · Ruby · Python · C# · Java · Node.js12 |
| Integrations · Rest API | REST API (JSON) · SMTP relay13 | yes14 |
| Integrations · Webhooks | yes15 | yes · , opens · clicks · bounce · block12 |
| Pricing · Cancel anytime | yes · yes16 | yes14 |
| Pricing · Free no credit card | yes · no15 | no17 |
| Pricing · Free tier | no · yes18 | yes19 |
| Pricing · Payment methods | credit card · PayPal · direct debit (SEPA) · yes20 | yes · yes · 5017 |
| Pricing · Price change notice | 30 · yes20 | Self-service rate changes effective immediately upon Control Panel posting; contract customers at next renewal21 |
| Product · Personalization | yes11 | Personalisierung direkt beim Server mit dynamischen Inhalten19 |
| Product · Sender reputation | Established sender reputation among Gmail, Outlook; strict control over all IP addresses15 | yes14 |
| Product · Unified platform | Transactional emails and marketing campaigns managed on one platform11 | Marketing-Kampagnen und Transaktions-E-Mails in einer Plattform19 |
| Product · Uptime | 99.913 | 99.919 |
| Subprocessors · Payment providers | Adyen · PayPal · GoCardless · Stripe · Chargebee · payment processing · PCI DSS20 | Stripe · Chargify · Aria · Authorize.net5 |
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.