Rspamd

Fast open-source spam and email security filter for mail servers.

Open sourceEmail spam filters

Updated Oct 30, 2026 · AppBreakup editorial · Self-hosted, Linux

Visit Rspamd See 3 alternatives

Is Rspamd free?

Yes, free and open source

Premium plans:: From £100 + VAT/month

Checked on Rspamd's site Nov 8, 2026

Switch from Rspamd to

All 3

Apache SpamAssassin
Open source
Proxmox Mail Gateway
Starting price: €540/year per host
SpamTitan
Paid

Verified facts: 4 of 4
Alternatives ranked: 3
Approved reviews: 0
Visits sent from here: 0

About Rspamd

Rspamd is a spam and email-threat filter written in C with an asynchronous core, built to scan large volumes of mail quickly. It combines regular-expression rules, DNS blocklists, SPF, DKIM, DMARC and ARC checks, greylisting and rate limiting, Bayesian and neural classifiers, and optional antivirus scanning through ClamAV. Newer modules can ask a GPT model or a local LLM to judge suspicious content. It sits in front of Postfix, Exim, Sendmail and other mail servers and comes with a web interface for stats and tuning. It can read SpamAssassin rules, which makes moving from SpamAssassin easier. The engine is free and open source under the Apache 2.0 licence; paid premium plans add extra detection data, a management console and support with response times. Configuration has many moving parts, so it suits admins comfortable with mail servers.

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

Rspamd pricing (checked Nov 8, 2026)

Each line is quoted from Rspamd's own site, with the page it came from.

Plan or term	What it says	Checked	Source
Premium plans	From £100 + VAT/month	Nov 8, 2026	rspamd.com

What works

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

Why people leave

Many modules and settings to learn
Some extra detection data requires a paid plan
Needs a mail server and admin skills to run

Rspamd vs Apache SpamAssassin, Proxmox Mail Gateway and SpamTitan

From each app's listing and the prices verified on its own site. A dash means we haven't verified it yet.

Attribute	Rspamd	Apache SpamAssassin	Proxmox Mail Gateway	SpamTitan
Pricing	Open source	Open source	Open source	Paid
Verified price	From £100 + VAT/month	—	€540/year per host	—
Free plan	Free app	Free app	Free app	No
Open source	No	No	No	No
Self-hostable	No	No	No	No
Platforms	Self-hosted, Linux	Self-hosted, Linux	Self-hosted, Linux	Web, Self-hosted

Top Rspamd alternatives

See all 3

1
Apache SpamAssassin
Simpler, long-established filter with plenty of guides and wide control-panel support.
68.8
2
Proxmox Mail Gateway
Packaged gateway appliance with a web UI and quarantine, if you'd rather not assemble the stack.
64.8
3
SpamTitan
Hosted filtering with sandboxing and vendor support, with no engine to maintain yourself.
61.8

Why people left Rspamd

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

No switching stories yet. If you moved away from Rspamd, review the app you switched to and tell us why.

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Rspamd: common questions

What is Rspamd?

Rspamd: Fast open-source spam and email security filter for mail servers. Best for admins of busy mail servers who want a faster, modern replacement for SpamAssassin. Available for Linux, and you can host it yourself.

Is Rspamd free?

Yes. Rspamd is free, open-source software.

How much does Rspamd cost?

Rspamd is free and open source. Premium plans: From £100 + VAT/month. Checked on Rspamd's own site, November 2026.

Is Rspamd open source?

No, Rspamd is not open source.

What platforms does Rspamd run on?

Rspamd is available for Self-hosted and Linux.

What are the best alternatives to Rspamd?

The highest-ranked Rspamd alternatives right now are Apache SpamAssassin, Proxmox Mail Gateway and SpamTitan. See the full ranked list for pricing, platforms and verified facts.

Rspamd vs Apache SpamAssassin: what's the difference?

Both Rspamd and Apache SpamAssassin are free and open source. Both run on Linux.

See all 3 Rspamd alternatives

Rspamd facts

4 of 4 verified

License: Apache 2.0; Checked Nov 8, 2026rspamd.com(opens source in a new tab); “detection engine is open source under the Apache 2.0 license”
Premium plans: From £100 + VAT/month; Checked Nov 8, 2026rspamd.com(opens source in a new tab); “Scale Scalable solution for businesses and larger organizations £100 + VAT/month”
SpamAssassin rules: Supported; Checked Nov 8, 2026rspamd.com(opens source in a new tab); “Rspamd loads SA-format rules and scores directly”
Sender authentication: SPF, DKIM, DMARC, ARC; Checked Nov 8, 2026rspamd.com(opens source in a new tab); “Sender Authentication Validate SPF, DKIM, DMARC, and ARC”