Mailjet

Mailjet is an email service (part of Sinch) that handles both marketing campaigns and transactional email in one platform. Marketers build newsletters and automations with a drag-and-drop editor and templates, while developers send transactional email — password resets, receipts, notifications — through Mailjet's SMTP relay and REST API. This combination of a marketer-friendly UI and a developer-friendly API makes it a flexible choice for teams that need both promotional and system-generated email. A distinguishing feature is real-time collaboration: multiple team members can work on the same email at once (like a shared document), with commenting and approval workflows, which is useful for teams and agencies. Mailjet includes segmentation, A/B testing, dynamic personalization, sub-account management, and detailed analytics, plus deliverability tools and dedicated IPs for higher volumes. Notably, its paid plans include unlimited contacts and price by email volume, which can be cost-effective for businesses with large lists that send moderately. Mailjet serves small businesses, developers, and marketing teams that want combined marketing plus transactional email. Pricing is volume-based (emails per month, unlimited contacts): a Free plan (6,000 emails/month, 200/day), Essential from about $17/month (15,000 emails, removes branding), and Premium from about $27/month (adds automation, landing pages, and advanced stats), plus a custom Enterprise tier. It competes with SendGrid, Mailchimp, Brevo, and Postmark, differentiating on real-time collaboration, unlimited contacts, and combined marketing-plus-API email.