Mailjet alternatives
Providers that compete with Mailjet on at least one of: Transactional Marketing
European-focused, GDPR-friendly all-in-one.
Switching as teams building autonomous agents
An agent stack treats email as a two-way primitive. Inbound has to arrive as structured JSON a tool call can consume, sends have to be safe to retry when a model loop repeats itself, and every action needs an audit trail. A provider without inbound parsing only solves half the problem.
Mailjet does not cover idempotency keys, and none of the alternatives below close that gap either. If it is a hard requirement, the shortlist has to widen beyond this category.
ranked for teams building autonomous agents
- 01
Elastic Email
Transactional MarketingLow-cost email API and SMTP relay with marketing features nearby.
Matches Mailjet on every priority weighed here, so the decision is price and preference.
$0/mo test plan with limited sending only to yourself · $19/mo for Email API up to 50,000 emails/mo - 02
SendGrid
Transactional MarketingTwilio-owned veteran with broad SDK coverage.
Matches Mailjet on every priority weighed here, so the decision is price and preference.
60-day free trial only (permanent free tier was removed May 2025) · $19.95/mo for 50,000 emails - 03
Brevo
Transactional MarketingAll-in-one with a generous daily free tier.
Gives up multi-tenant support against Mailjet and adds nothing on these priorities.
300/day permanent · $9/mo for 5,000 emails - 04
Customer.io
Marketing TransactionalBehavior-driven lifecycle messaging.
Gives up inbound parsing against Mailjet and adds nothing on these priorities.
No permanent free tier; trial only · $100/mo (Essentials) - 05
Loops
Marketing TransactionalModern lifecycle and broadcast email for SaaS.
Gives up inbound parsing and multi-tenant support against Mailjet and adds nothing on these priorities.
1,000 contacts and 4,000 sends/mo on the Free plan · $49/mo for 5,000 contacts - 06
Plunk
Self-hosted MarketingOpen-source unified email platform.
Gives up inbound parsing and multi-tenant support against Mailjet and adds nothing on these priorities.
3,000/mo on hosted free plan · $19/mo or self-host - 07
Mailchimp / Mandrill
Marketing TransactionalLegacy marketing giant, transactional via Mandrill.
Gives up inbound parsing and multi-tenant support against Mailjet and adds nothing on these priorities.
500 contacts, 1,000 sends/month · $13/mo Essentials - 08
SendPulse
Transactional MarketingMarketing suite with a generous transactional SMTP tier.
Gives up inbound parsing, SDK breadth, and multi-tenant support against Mailjet and adds nothing on these priorities.
12,000 transactional emails/mo on SMTP Basic, 50 messages/hour · $15 pay-as-you-go for 10,000 emails, or $74.85/mo monthly for Pro 100,000
Mailjet and its alternatives, side by side
Columns are the priorities teams building autonomous agents weigh, in order. Mailjet is the first row so the trade in each direction is readable at a glance.
| Provider | Inbound parsing | Idempotency keys | Webhooks | Operating since | Event stream | Best published rate per 1,000 | Batch sending | SDKs | Multi-tenant |
|---|---|---|---|---|---|---|---|---|---|
| Mailjet | Yes | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, java, dotnet | Yes |
| Elastic Email | Yes | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, python, php, java, dotnet | Yes |
| SendGrid | Yes | No | Yes | 2009 | Yes | $0.40 | Yes | node, python, go, ruby, php, java, dotnet | Yes |
| Brevo | Yes | No | Yes | 2012 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, java, dotnet | No |
| Customer.io | No | No | Yes | 2012 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, java | Yes |
| Loops | No | No | Yes | 2022 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php | No |
| Plunk | No | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, python | No |
| Mailchimp / Mandrill | No | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes | node, python, php, ruby | No |
| SendPulse | No | No | Yes | Not published | Yes | Tiers not published in comparable form | Yes | None | No |
Nothing on this list is a clean upgrade: every alternative trades something away against Mailjet on these priorities, so the choice depends on which of them the build actually needs.