# Brevo Transactional Email vs Mailjet Email API — Transactional Email

As of 1 Nov 2026, the panel rates [Brevo Transactional Email](https://whats-best.ai/software/transactional-email/brevo-transactional) 3/5 and [Mailjet Email API](https://whats-best.ai/software/transactional-email/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](https://whats-best.ai/methodology#ordering).

- Canonical page: https://whats-best.ai/compare/brevo-transactional-vs-mailjet-email-api
- Brevo Transactional Email: https://whats-best.ai/software/transactional-email/brevo-transactional ([md](https://whats-best.ai/software/transactional-email/brevo-transactional.md))
- Mailjet Email API: https://whats-best.ai/software/transactional-email/mailjet-email-api ([md](https://whats-best.ai/software/transactional-email/mailjet-email-api.md))
- Category: [Transactional Email](https://whats-best.ai/software/transactional-email.md)
- Data as of: 2026-11-06

**AI-generated.** Both products were evaluated from public evidence by the same panel of AI judges under the same rubric; without that, no comparison is published. Not a hands-on test; no score can be bought, on either side. How scores are made: https://whats-best.ai/methodology

## 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.

## Overall

| | Brevo Transactional Email | Mailjet Email API |
|---|---|---|
| Panel rating | 3/5 | 3/5 |
| Provenance | EU-Made | EU-Made |
| Sovereignty | not determined | not determined |

## The bench's picks

| Judge | Brevo Transactional Email | Mailjet Email API | Pick |
|---|---|---|---|
| The SaaS Developer | 3/5 | 3/5 | Brevo Transactional Email |
| The Platform Engineer | 3/5 | 3/5 | Mailjet Email API |
| The Shop Operator | 3/5 | 3/5 | Brevo Transactional Email |
| The Data Protection Officer | 3/5 | 3/5 | Mailjet Email API |
| The Agency Lead | 3/5 | 3/5 | tie |
| The Skeptic | 3/5 | 3/5 | Mailjet Email API |

## Criterion by criterion

Bench average per criterion, out of 5; the lean counts which product each judge scored higher.

| Criterion | Brevo Transactional Email | Mailjet Email API | The bench leans |
|---|---|---|---|
| Sending API, SMTP & developer experience | 3.5/5 | 3/5 | Brevo Transactional Email, 6 of 6 judges |
| Deliverability & sender reputation | 3/5 | 3/5 | split 0–0 |
| Message logs, events & webhooks | 3/5 | 3/5 | Brevo Transactional Email, 2 of 6 judges |
| Message data, retention & security | 3/5 | 3/5 | Mailjet Email API, 1 of 6 judges |
| Reliability, accounts & support | 3/5 | 3.5/5 | Mailjet Email API, 5 of 6 judges |
| European sovereignty | 3/5 | 3.5/5 | Mailjet Email API, 4 of 6 judges |
| Pricing transparency | 2.5/5 | 2.5/5 | split 0–0 |

## 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; each is the vendor's own dated statement ([S*n*] → Sources).

| Fact | Brevo Transactional Email | Mailjet Email API |
|---|---|---|
| Compliance · Certifications | yes · yes · yes · yes [S1] | yes · yes · EU-based data centers · yes · yes [S2] |
| Compliance · DPA available | yes [S3] | Standard-AVV (Auftragsverarbeitungsvertrag) · yes [S4] |
| Compliance · Dpf certification | yes · EU-U.S. Data Privacy Framework · UK · Swiss · U.S. Department of Commerce [S3] | yes · yes [S5] |
| Compliance · ISO 27001 | yes · ISO 27001:2022 [S6] | yes [S7] |
| Compliance · ISO 27001 | yes · ISO 27001:2022 · yes [S8] | yes · yes [S9] |
| Hosting · Data residency | France · Germany · yes [S1] | EU · 2 · 6 [S9] |
| Hosting · Providers | Kinsta Inc · Vercel Inc. [S10] | Google Cloud Platform · AWS · MacStadium · Rackspace [S5] |
| Integrations · API languages | PHP · Node · Python [S11] | PHP · Ruby · Python · C# · Java · Node.js [S12] |
| Integrations · Rest API | REST API (JSON) · SMTP relay [S13] | yes [S14] |
| Integrations · Webhooks | yes [S15] | yes · , opens · clicks · bounce · block [S12] |
| Pricing · Cancel anytime | yes · yes [S16] | yes [S14] |
| Pricing · Free no credit card | yes · no [S15] | no [S17] |
| Pricing · Free tier | no · yes [S18] | yes [S19] |
| Pricing · Payment methods | credit card · PayPal · direct debit (SEPA) · yes [S20] | yes · yes · 50 [S17] |
| Pricing · Price change notice | 30 · yes [S20] | Self-service rate changes effective immediately upon Control Panel posting; contract customers at next renewal [S21] |
| Product · Personalization | yes [S11] | Personalisierung direkt beim Server mit dynamischen Inhalten [S19] |
| Product · Sender reputation | Established sender reputation among Gmail, Outlook; strict control over all IP addresses [S15] | yes [S14] |
| Product · Unified platform | Transactional emails and marketing campaigns managed on one platform [S11] | Marketing-Kampagnen und Transaktions-E-Mails in einer Plattform [S19] |
| Product · Uptime | 99.9 [S13] | 99.9 [S19] |
| Subprocessors · Payment providers | Adyen · PayPal · GoCardless · Stripe · Chargebee · payment processing · PCI DSS [S20] | Stripe · Chargify · Aria · Authorize.net [S5] |

## Sources

- [S1] Vendor homepage (transactional email): https://www.brevo.com/products/transactional-email/ (checked 2026-11-01)
- [S2] Features page (SMTP relay): https://www.mailjet.com/products/email-api/smtp-relay/ (checked 2026-11-01)
- [S3] Privacy policy: https://www.brevo.com/legal/privacypolicy/ (checked 2026-11-01)
- [S4] Message data, retention & security — found from sitemap: https://www.mailjet.com/de/rechtliches/sicherheit-datenschutz/ (checked 2026-11-01)
- [S5] Privacy policy: https://www.mailjet.com/legal/privacy-policy/ (checked 2026-11-01)
- [S6] Security / trust page (data security): https://www.brevo.com/features/data-security/ (checked 2026-11-01)
- [S7] Security / trust page: https://www.mailjet.com/products/data-security-and-privacy/ (checked 2026-11-01)
- [S8] Message data, retention & security — found from sitemap: https://www.brevo.com/de/features/data-security/ (checked 2026-11-01)
- [S9] Reliability, accounts & support — found from sitemap: https://www.mailjet.com/products/email-api/infrastructure/ (checked 2026-11-01)
- [S10] Legal notice: https://www.brevo.com/legal/notice/ (checked 2026-11-01)
- [S11] Features page (transactional email, German): https://www.brevo.com/de/products/transactional-email/ (checked 2026-11-01)
- [S12] Features page (transactional email): https://www.mailjet.com/solutions/use-cases/transactional-email/ (checked 2026-11-01)
- [S13] Sending API, SMTP & developer experience — found from sitemap: https://www.brevo.com/features/email-api/ (checked 2026-11-01)
- [S14] Vendor homepage (email API): https://www.mailjet.com/products/email-api/ (checked 2026-11-01)
- [S15] Features page (SMTP relay): https://www.brevo.com/free-smtp-server/ (checked 2026-11-01)
- [S16] Pricing page: https://www.brevo.com/pricing/ (checked 2026-11-01)
- [S17] Pricing page: https://www.mailjet.com/pricing/ (checked 2026-11-01)
- [S18] Security / trust page (GDPR): https://www.brevo.com/company/gdpr/ (checked 2026-11-01)
- [S19] Sending API, SMTP & developer experience — found from sitemap: https://www.mailjet.com/de/produkte/email-api/smtp-relay/ (checked 2026-11-01)
- [S20] Terms of service: https://www.brevo.com/legal/termsofuse/ (checked 2026-11-01)
- [S21] Terms of service: https://www.mailjet.com/legal/terms/ (checked 2026-11-01)

## Questions

### 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](https://whats-best.ai/methodology).

### 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.

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Cite as: whats-best.ai, "Brevo Transactional Email vs Mailjet Email API", AI panel comparison, as of 2026-11-06. https://whats-best.ai/compare/brevo-transactional-vs-mailjet-email-api