SpamAssassin is a powerful and popular open-source spam filter that uses a variety of spam-detection techniques.
Best SpamHero Alternatives ranked by AI · updated Aug 2026
SpamHero is a hosted email filtering service that removes spam, malware, and phishing messages before delivery. It is designed for small businesses and domain administrators who want a simpler alternative to operating a mail-filtering server.
Top 6 SpamHero alternatives
MailScanner is a highly respected open-source email security system design for Linux-based email gateways.
Proxmox Mail Gateway is a mail security solution for spam and virus filtering. It provides an easy-to-use web-based interface with quarantine, reports,...
Starting at $249/year
Rspamd is an open-source, high-performance spam filtering system for mail servers and hosting providers. It combines statistical analysis, reputation data, antivirus integration,...
Pros
- Faster and more resource-efficient than many traditional content filters
- Strong Bayesian, reputation, DKIM, DMARC, and fuzzy-checking capabilities
- Flexible Lua scripting and HTTP API support advanced mail workflows
Cons
- More complex to configure than hosted spam-filtering services
- Requires mail-server administration and ongoing rule tuning
- Smaller ecosystem and less legacy documentation than SpamAssassin
Free, open source
5
Mimecast offers email security and archiving solutions with a focus on protecting against advanced threats and ensuring data resilience.
Pros
- Advanced threat protection
- Data resilience features
Cons
- Pricing may vary based on feature set
Contact for pricing
6
Sophos Email
Sophos
Sophos Email is a cloud-managed email security service for businesses using Microsoft 365, Google Workspace, or hosted mail infrastructure. It provides anti-spam,...
Pros
- Simpler deployment and maintenance than self-hosted Rspamd
- Strong integration with Sophos Central and broader security products
- Provides managed anti-phishing and impersonation controls
Cons
- Less flexible than Rspamd for custom rules and local processing
- Requires a commercial subscription and vendor dependency
- Advanced controls may depend on plan or ecosystem integration
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