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Head-to-head · Anti-spam Software

Rspamd vs SpamBrella

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Rspamd #1 in Anti-spam Software 9.1/10 Free plan Free plan✓ 0 of 5 features Visit Rspamd
SpamBrella #5 in Anti-spam Software 8.5/10 Pricing on request · 30-day trial Free trial✓ 5 of 5 features Visit SpamBrella

Rspamd leads on 1 check, SpamBrella on 0, and 5 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreRspamd · 9.1/10
  • Free planonly Rspamd
  • Free trialonly SpamBrella
  • Most featuresSpamBrella · 5 of 5

Rspamd scores higher on our rubric for anti-spam software: 9.1 against 8.5 out of 10; our editors rank them #1 and #5.

Rspamd offers free plan; SpamBrella doesn't.

Rspamd is the better fit for admins wanting configurable, open-source gateway filtering. SpamBrella is the better fit for teams needing filtering plus continuity and archiving.

  • Rspamd fits best

    Admins wanting configurable, open-source gateway filtering

  • SpamBrella fits best

    Teams needing filtering plus continuity and archiving

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Rspamd 9.1/10 Visit ↗ SpamBrella 8.5/10 Visit ↗
At a glance
Editor score 9.1 8.5
Ranking #1 in Anti-spam Software #5 in Anti-spam Software
Best for Admins wanting configurable, open-source gateway filtering Teams needing filtering plus continuity and archiving
Pricing model Free plan + paid Paid
Starting price £100/mo Pricing on request · 30-day trial
Free plan ✓ (best) —
Free trial — 30 days
Deployment Desktop, Self-hosted Cloud
Platforms Linux, macOS Web
Integrations 11 integrations 6 integrations
Features Rspamd 0/5 · SpamBrella 5/5
Phishing protection Not checked yet ✓ (best)
Malware scanning Not checked yet ✓ (best)
Quarantine controls Not checked yet ✓ (best)
API access Not checked yet ✓ (best)
Email continuity Not checked yet ✓ (best)
Specs
Deployment Not checked yet Cloud
Users included Not checked yet Not checked yet
Our review
Pros
  • Open-source filtering with Bayesian classification and machine learning
  • Validates SPF, DKIM, and DMARC while detecting phishing URLs
  • Integrates with major mail transfer agents through HTTP or Milter
  • AI phishing detection includes scan-time and click-time URL defense
  • Continuity adds emergency inbox, failover, spooling and 30-day replay
  • Supports Microsoft 365, Google Workspace and a REST administration API
Cons
  • Paid Scale access starts at £100/month for 5K mailboxes
  • Gateway deployment demands responsibility for mail infrastructure
  • Advanced Lua rules and configurable scoring add administration work
  • Pricing requires contacting sales or a partner
  • No perpetual free plan; access is through a 30-day trial
  • Cloud deployment may not suit teams seeking another deployment model
Our verdict

Rspamd is an open-source email filtering engine for enterprises, email service providers, hosting providers, and mail-server operators. It analyzes inbound and outbound messages with statistical learning, reputation data, authentication…

Read the review →

SpamBrella is a cloud-based email security service for organizations and managed service providers that need to filter inbound and outbound mail. It covers spam, bulk mail, malware, phishing, spoofing and impersonation, with configurable…

Read the review →
  1. RspamdAnti-spam Software 9.1Free plan
  2. SpamBrellaAnti-spam Software 8.5Pricing on request · 30-day trial

Strengths and trade-offs

  • Rspamd — where it wins

    • Open-source filtering with Bayesian classification and machine learning
    • Validates SPF, DKIM, and DMARC while detecting phishing URLs
    • Integrates with major mail transfer agents through HTTP or Milter

    Where it doesn't

    • Paid Scale access starts at £100/month for 5K mailboxes
    • Gateway deployment demands responsibility for mail infrastructure
    • Advanced Lua rules and configurable scoring add administration work

  • SpamBrella — where it wins

    • AI phishing detection includes scan-time and click-time URL defense
    • Continuity adds emergency inbox, failover, spooling and 30-day replay
    • Supports Microsoft 365, Google Workspace and a REST administration API

    Where it doesn't

    • Pricing requires contacting sales or a partner
    • No perpetual free plan; access is through a 30-day trial
    • Cloud deployment may not suit teams seeking another deployment model
  • Rspamd9.1/10 · Free plan

    Configurable gateway filtering with machine learning and broad mail-server integration.

    Visit RspamdFull verdict →
  • SpamBrella8.5/10 · Pricing on request · 30-day trial

    Cloud filtering pairs threat defense with continuity, replay and archiving.

    Visit SpamBrellaFull verdict →

More comparisons

All anti-spam software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update