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Free SpamTitan alternatives: 3 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rank

3 of the 6 SpamTitan alternatives we track can be used for free (free, open source, or with a free plan). Rspamd, Proxmox Mail Gateway and Apache SpamAssassin rank highest, with facts last verified Nov 8, 2026.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1Rspamd logoRspamdOpen sourceFrom £100 + VAT/monthNoSelf-hosted, Linux4 of 468.8
2Proxmox Mail Gateway logoProxmox Mail GatewayOpen source€540/year per hostNoSelf-hosted, Linux4 of 464.8
3Apache SpamAssassin logoApache SpamAssassinOpen source—NoSelf-hosted, Linux5 of 561.8
  1. Rspamd logo

    1. RspamdTop pick

    Best for: Admins of busy mail servers who want a faster, modern replacement for SpamAssassin

    Open sourceSelf-hosted, Linux

    68.8

    score / 100

    Why switch from SpamTitan

    Free open-source engine you host yourself, with optional paid support from its developers.

    Pros

    • Fast C core that handles high mail volumes
    • Built-in SPF, DKIM, DMARC and ARC checks
    • Loads SpamAssassin rules for gradual migration
    • Free engine, with optional paid support and data feeds

    Cons

    • Many modules and settings to learn
    • Some extra detection data requires a paid plan
    • Needs a mail server and admin skills to run
    Visit Rspamd Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Rspamd a good SpamTitan alternative?

    Verified facts

    4 of 4 verified
    License
    Apache 2.0
    Checked Nov 8, 2026rspamd.com(opens source in a new tab)
    Premium plans
    From £100 + VAT/month
    Checked Nov 8, 2026rspamd.com(opens source in a new tab)
    SpamAssassin rules
    Supported
    Checked Nov 8, 2026rspamd.com(opens source in a new tab)
    Sender authentication
    SPF, DKIM, DMARC, ARC
    Checked Nov 8, 2026rspamd.com(opens source in a new tab)
  2. Proxmox Mail Gateway logo

    2. Proxmox Mail Gateway

    Best for: Companies running their own mail servers who want a packaged filtering gateway with a web UI

    Open sourceSelf-hosted, Linux

    64.8

    score / 100

    Why switch from SpamTitan

    Open-source gateway with public per-host pricing and unlimited users.

    Pros

    • Complete gateway with web UI, quarantine and mail tracking
    • Bundles ClamAV antivirus and SpamAssassin
    • Open source and usable without a subscription
    • Subscriptions cover unlimited users and domains per host

    Cons

    • You run and maintain the gateway yourself
    • Support and the enterprise repository need a paid subscription
    • Relies on SpamAssassin, so it inherits its performance limits
    Visit Proxmox Mail Gateway Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Proxmox Mail Gateway a good SpamTitan alternative?

    Verified facts

    4 of 4 verified
    License
    GNU AGPLv3
    Checked Nov 8, 2026proxmox.com(opens source in a new tab)
    Starting price
    €540/year per host
    Checked Nov 8, 2026proxmox.com(opens source in a new tab)
    Users and domains
    Unlimited per subscription
    Checked Nov 8, 2026proxmox.com(opens source in a new tab)
    Filtering engines
    Postfix, ClamAV, SpamAssassin
    Checked Nov 8, 2026proxmox.com(opens source in a new tab)
  3. Apache SpamAssassin logo

    3. Apache SpamAssassin

    Best for: Mail server admins who want a free, well-documented and widely supported spam filter

    Open sourceSelf-hosted, Linux

    61.8

    score / 100

    Why switch from SpamTitan

    Free filter with no licence costs, if you have the skills to run your own mail server.

    Pros

    • Free and open source with no paid tier
    • Works with most mail transfer agents and control panels
    • Rules and scores are plain text and easy to extend
    • Long track record and plenty of documentation

    Cons

    • Perl-based and slower than newer engines on busy servers
    • Needs a mail server and admin skills to set up
    • Community support only, with no official paid support
    Visit Apache SpamAssassin Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Apache SpamAssassin a good SpamTitan alternative?

    Verified facts

    5 of 5 verified
    License
    Apache-2.0
    Checked Oct 29, 2026github.com(opens source in a new tab)
    Owner
    Apache Software Foundation
    Checked Nov 8, 2026spamassassin.apache.org(opens source in a new tab)
    Detection methods
    Rules, Bayesian filtering, DNS blocklists
    Checked Nov 8, 2026spamassassin.apache.org(opens source in a new tab)
    Latest release
    4.0.2 (30 Aug 2025)
    Checked Nov 8, 2026spamassassin.apache.org(opens source in a new tab)
    Integrations
    Postfix, Sendmail, qmail and more
    Checked Nov 8, 2026spamassassin.apache.org(opens source in a new tab)