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Head-to-head · Email Anti-Spam Software

MX Guarddog vs N-able Mail Assure

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score MX Guarddog #3 in Email Anti-Spam Software 8.7/10 Free plan · 30-day trial Free planFree trial✓ 2 of 3 features Visit MX Guarddog
N-able Mail Assure #4 in Email Anti-Spam Software 8.6/10 Pricing on request · 30-day trial Free trial✓ 0 of 3 features Visit N-able

MX Guarddog leads on 1 check, N-able Mail Assure on 0, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMX Guarddog · 8.7/10
  • Free planonly MX Guarddog
  • Free trialboth
  • Most featuresMX Guarddog · 2 of 3

MX Guarddog scores higher on our rubric for email anti-spam software: 8.7 against 8.6 out of 10; our editors rank them #3 and #4.

MX Guarddog offers free plan; N-able Mail Assure doesn't.

MX Guarddog is the better fit for budget-conscious domain owners. N-able Mail Assure is the better fit for MSPs managing multiple protected mail environments.

  • MX Guarddog fits best

    Budget-conscious domain owners

  • N-able Mail Assure fits best

    MSPs managing multiple protected mail environments

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 MX Guarddog 8.7/10 Visit ↗ N-able Mail Assure 8.6/10 Visit ↗
At a glance
Editor score 8.7 8.6
Ranking #3 in Email Anti-Spam Software #4 in Email Anti-Spam Software
Best for Budget-conscious domain owners MSPs managing multiple protected mail environments
Pricing model Free plan + paid Paid
Starting price $0.25/unit/mo Pricing on request · 30-day trial
Free plan ✓ (best) —
Free trial 30 days 30 days
Free trial length 30 days · no card needed 30 days
Deployment Cloud Cloud
Platforms Web Web
Integrations 3 integrations 2 integrations
Features MX Guarddog 2/3 · N-able Mail Assure 0/3
Phishing detection ✓ (best) Not checked yet
Malware scanning ✓ (best) Not checked yet
Attachment scanning Not checked yet Not checked yet
Specs
Quarantine access User_and_admin Not checked yet
Supported mail platforms Standard SMTP email servers for owned domains; not consumer Gmail or Hotmail accounts Not checked yet
Quarantine retention 7 days Not checked yet
Deployment type Cloud_gateway Not checked yet
Our review
Pros
  • Spam, phishing, malware and virus scanning
  • Quarantine access with message release and reports
  • 168-hour outage spooling with TLS encryption
  • Filters inbound and outbound email with machine learning and threat intelligence
  • Combines continuity, encrypted archiving, quarantine, and authentication controls
  • Supports multitenant management, Microsoft 365, Google Workspace, and an API
Cons
  • Does not support consumer Gmail or Hotmail accounts
  • Designed for owned domains using standard SMTP servers
  • Free access requires visible website text links to earn tokens
  • Pricing requires contacting sales rather than selecting a published numeric plan
  • The 30-day offer is a trial, not a perpetual free plan
  • Cloud deployment may not suit organizations requiring an on-premises model
Our verdict

MX Guarddog is a hosted email security service for organizations, individuals and domain owners operating their own email servers. It routes incoming mail through MX Guarddog data centers, scans messages for spam, phishing, malware and…

Read the review →

N-able Mail Assure is a cloud-based email security service designed primarily for managed service providers and their customers. It filters inbound and outbound email against spam, malware, phishing, ransomware, spoofing, and other…

Read the review →
  1. MX GuarddogEmail Anti-Spam Software 8.7Free plan · 30-day trial
  2. N-able Mail AssureEmail Anti-Spam Software 8.6Pricing on request · 30-day trial

Strengths and trade-offs

  • MX Guarddog — where it wins

    • Spam, phishing, malware and virus scanning
    • Quarantine access with message release and reports
    • 168-hour outage spooling with TLS encryption

    Where it doesn't

    • Does not support consumer Gmail or Hotmail accounts
    • Designed for owned domains using standard SMTP servers
    • Free access requires visible website text links to earn tokens
  • N-able Mail Assure — where it wins

    • Filters inbound and outbound email with machine learning and threat intelligence
    • Combines continuity, encrypted archiving, quarantine, and authentication controls
    • Supports multitenant management, Microsoft 365, Google Workspace, and an API

    Where it doesn't

    • Pricing requires contacting sales rather than selecting a published numeric plan
    • The 30-day offer is a trial, not a perpetual free plan
    • Cloud deployment may not suit organizations requiring an on-premises model
  • MX Guarddog8.7/10 · Free plan · 30-day trial

    A low-cost cloud gateway for domain owners who run their own email servers.

    Visit MX GuarddogFull verdict →
  • N-able Mail Assure8.6/10 · Pricing on request · 30-day trial

    A broad, MSP-focused email security service with filtering, continuity, archiving, and multitenant control.

    Visit N-ableFull verdict →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update