Mailjet Review

Overview

Mailjet is a Paris-founded email platform launched in 2010, now owned by Sinch (which also owns Mailgun). It occupies an interesting middle ground: developer-friendly API tools for transactional email, combined with a marketing campaign builder that includes real-time team collaboration — a feature no other email tool does as well. Over 100,000 companies use Mailjet, including DHL, Microsoft, and American Express.

The free plan allows 6,000 emails per month with a 200-email daily cap and includes the email builder, analytics, and basic automation. Paid plans start at $17/month for 15,000 emails, and pricing scales by email volume rather than subscriber count — you can store unlimited contacts on every plan. That volume-based model is a genuine advantage for businesses with large lists but moderate send frequency. The Premium plan ($27/mo for 15,000 emails) adds A/B testing, segmentation, and marketing automation.

Built-in GDPR compliance matters here. As a French company operating under EU data protection law from day one, Mailjet stores data in EU data centers and includes consent management tools out of the box. For European businesses or anyone selling to EU customers, this removes a compliance headache that US-based tools often handle as an afterthought.

Ease of Use

Mailjet’s standout UX feature is real-time collaborative editing. Multiple team members can work on the same email simultaneously, leave comments on specific sections, and lock content blocks to prevent unauthorized changes. It works like Google Docs for email, and it’s genuinely useful for teams where marketing, design, and compliance all need to review campaigns before they go out.

The drag-and-drop email builder is solid — not as polished as Campaign Monitor’s or MailerLite’s, but functional with a reasonable template library. Creating and sending a basic campaign is straightforward. Where Mailjet gets confusing is in its deeper settings: configuring automation triggers, setting up transactional templates, and navigating between the marketing and developer-focused sections of the dashboard can feel disjointed. Multiple reviewers note that the most important features are sometimes hard to find.

For developers, the API is well-documented with libraries for PHP, Python, Ruby, Node.js, Java, and Go. SMTP relay setup is simple, and the Parse API handles inbound email processing — useful for apps that need to receive and process emails, not just send them.

Automation & Features

Mailjet’s automation covers the essentials: welcome sequences, re-engagement campaigns, and date-triggered sends. The workflow builder is visual but basic — think straight-line sequences rather than complex branching trees. Triggers based on opens or clicks are available but reportedly tricky to configure, and abandoned cart workflows require connecting Zapier or a similar tool.

A/B testing (on Premium plans) supports subject line, content, and sender name variations. Segmentation works with contact properties and engagement data. The Email Validation API checks addresses before sending to protect your sender reputation. Dedicated IP addresses are available for high-volume senders who want full control over their deliverability.

The integration story is a weakness. Mailjet’s native integrations are limited — most connections to CRMs, ecommerce platforms, and other marketing tools require Zapier or the API. There’s no built-in landing page builder, and signup form options are basic compared to tools like MailerLite or ConvertKit.

Deliverability

Mailjet delivers a 94% inbox placement rate in our testing. That’s acceptable but below the industry leaders — ConvertKit (98%), Postmark (99%), and MailerLite (97%) all outperform it. Being part of the Sinch/Mailgun family gives Mailjet access to serious email infrastructure, but the shared IP pools mean your reputation depends partly on other senders on the same IPs.

Domain authentication (DKIM, SPF, DMARC) setup is guided and well-documented. The built-in email validation service helps maintain list hygiene, and Mailjet provides deliverability dashboards showing bounce rates, spam complaints, and inbox placement estimates. Dedicated IPs on higher plans let you isolate your reputation from the shared pool.

Support

Free plan users get access to the knowledge base and community resources only — no direct support. The Essential plan ($17/mo) adds online support, while Premium ($27/mo) includes priority support. Phone support and a dedicated account manager are reserved for custom enterprise plans.

The knowledge base is thorough, and the API documentation is among the better-organized in the industry. Mailjet Academy offers free email marketing courses that go beyond platform tutorials. But for time-sensitive issues on lower-tier plans, the lack of live chat or phone access means you’re waiting on email responses, which multiple users report can take 12-24 hours.

Who Should Use Mailjet

Mailjet fits best for teams that need both transactional and marketing email in one platform, especially if collaboration is important to your workflow. The real-time collaborative editor is a genuine differentiator for marketing teams with multiple stakeholders. European businesses will appreciate the native GDPR compliance and EU data hosting. Developers who need a reliable API for transactional email alongside a marketing tool for campaigns get both without managing two separate services.

It’s not the right choice if you need advanced automation — ActiveCampaign, Drip, and even MailerLite offer significantly more depth. Solo marketers or small businesses that don’t need team collaboration won’t benefit from Mailjet’s main differentiator and will find better value at Brevo (also French, also GDPR-compliant, with a more generous free plan of 300 emails/day). And if deliverability is your top priority, tools like ConvertKit or Postmark consistently outperform Mailjet in inbox placement testing.