Halon is a Swedish email infrastructure and security company founded in 2010, serving businesses, service providers, and large-scale email senders globally. The company offers three core products designed to address different aspects of email operations and security. Halon Engage is an email infrastructure platform built for high-volume senders such as email service providers, martech platforms, and large B2C/B2B brands. It focuses on scalability, deliverability control, and operational agility for managing large-scale outbound email flows. Halon Protect is an email security solution targeted at service providers, enabling teams to define and enforce security policies across email flows. It provides protection against spam, phishing, and malware while maintaining visibility and compliance as threats evolve. Halon Classify is a threat detection and email filtering engine that offers carrier-grade performance and spam, phishing, and malware detection. It is built for integration into diverse environments at scale and is GDPR-compliant, developed by teams in Europe with deep threat intelligence capabilities. Halon maintains a partner ecosystem that includes technology partners such as Sophos and Spamhaus, deliverability partners including Postmastery and Email Industries, and industry alliances such as M3AAWG and the Certified Senders Alliance. The company positions its solutions for mission-critical email operations, emphasizing flexibility, scalability, and policy control for service providers and enterprise senders.