Litmus
The industry-standard email testing and optimization platform for high-performance marketing teams.
The collaborative email service provider for high-volume marketing and transactional delivery.
Mailjet, a Sinch company, has evolved by 2026 into a sophisticated enterprise-grade email infrastructure provider that bridges the gap between marketing agility and developer-centric API reliability. Its architecture is built upon a high-concurrency SMTP relay and a RESTful API capable of processing millions of messages per hour with sub-second latency. A key differentiator is its MJML framework integration, which has become the industry standard for responsive email coding, allowing teams to bypass CSS-inlining headaches. The platform's 2026 market position is defined by its 'Real-Time Collaboration' suite, which functions similarly to Google Docs for email design, enabling legal, design, and marketing teams to edit templates simultaneously. With a heavy focus on European data sovereignty, Mailjet maintains extensive GDPR-compliant server clusters within the EU, making it a preferred choice for financial services and healthcare providers requiring strict data residency. The technical stack supports advanced webhooks for event tracking (opens, clicks, bounces, blocks) in real-time, feeding directly into modern data warehouses or CRMs like Salesforce and HubSpot.
Native support for the MJML open-source framework, allowing for semantic, responsive email component development.
The industry-standard email testing and optimization platform for high-performance marketing teams.
The intelligent customer data platform for automated e-commerce growth.
Premium email verification and deliverability suite for high-volume enterprise senders.
The intelligent CRM and automation platform that converts leads into lifelong customers through AI-driven sales orchestration.
Verified feedback from the global deployment network.
Post queries, share implementation strategies, and help other users.
In-editor multi-user state synchronization using operational transformation logic.
High-availability relay service using port 587 or 465 with TLS encryption.
Support for logical operators and variables within templates (If/Else, Loops) via templating language.
Server-side rendering of emails across 50+ devices and clients using integrated screenshot engines.
Trigger-based sequencing logic based on contact behavior or external API events.
Embeddable JS snippets for compliant double-opt-in contact acquisition.
Ensuring high-priority shipping updates don't land in the spam folder.
Registry Updated:2/7/2026
Siloed teams creating inconsistent brand experiences.
Critical security emails delayed by legacy infrastructure.