Postigo vs Sidemail

Sidemail is an all-in-one email delivery platform for startups that makes sending emails simple. It has everything for delivering and managing emails – email API, transactional emails, email marketing and automation, contact management, no-code email editor, email templates, subscribe forms, and more. Perfect for teams & developers that want reliable deliverability without the bloat. We're based in the EU and GDPR compliant.

Postigo is an advanced email delivery and outreach platform designed to solve the technical challenges of cold email routing and sender reputation management. For growth engineers, marketing ops, and sales operations teams, maintaining high deliverability while scaling outbound campaigns often requires complex IP warming and constant monitoring of spam trap triggers. Postigo abstracts this complexity by providing out-of-the-box, fully warmed-up SMTP servers paired with an AI-driven content generation engine. By dynamically generating unique, personalized email payloads at scale, Postigo prevents campaigns from being flagged by algorithmic spam filters that detect repetitive content. With an emphasis on reliability and compliance, Postigo fits seamlessly into modern sales and marketing stacks, allowing teams to focus on campaign logic rather than underlying email infrastructure.