SaaS Email Protection Against Spam, Phishing, Malware and Ransomware

AltoSpam has specialized in email cybersecurity since 2002, delivering protection as a fully managed SaaS service so organizations can secure their mail flows without deploying hardware or software of their own. Headquartered in Bordeaux, the company protects thousands of businesses and local authorities, and it emphasizes digital sovereignty: its servers are distributed across data centers in France and its support teams operate from French soil. In 2025 the company joined the Hornetsecurity Group, extending its reach as part of a broader European email security portfolio.

The flagship Mailsafe solution filters inbound email through layered defenses that combine more than a dozen anti-spam technologies with multiple antivirus engines, adding anti-phishing, anti-scam, anti-relay, and denial-of-service safeguards on top. Because filtering happens upstream of the mail server, threats are stopped before they ever reach user mailboxes, and the redundant architecture keeps email service highly available even during attacks. The Mailout companion product secures and monitors outgoing mail flows, protecting sender reputation and deliverability, while awareness training rounds out the offering on the human side.

AltoSpam's differentiator is the combination of deep filtering accuracy and strict data localization. Its detection stack applies heuristic and AI-driven analysis tuned over two decades of exclusive focus on email threats, targeting the false-positive rate that plagues generic gateways. For European organizations subject to GDPR and sovereignty requirements, the guarantee that every message is processed and stored on French infrastructure, backed by local support, makes the platform a natural fit for companies, public agencies, and the MSPs that serve them.