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BlockBlock alternatives: 3 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave BlockBlock: does not detect or remove known malware the way a scanner does, and alerts for legitimate installers need judgement from the user. We ranked 3 alternatives by how directly each one replaces BlockBlock, then by reviews, real visits and how recently each app's facts were checked against its own website. KnockKnock currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1KnockKnock logoKnockKnockOpen sourceNomacOS4 of 466.5
2Malwarebytes logoMalwarebytesFree plan + paidNoWindows, macOS, Android +14 of 462.6
3ClamXAV logoClamXAVPaidNomacOS5 of 559.6
  1. KnockKnock logo

    1. KnockKnockTop pick

    Best for: Mac users and responders checking a machine for anything that persists across restarts

    Open sourcemacOS

    66.5

    score / 100

    Why switch from BlockBlock

    Same developer and also free; scans for everything already set to persist instead of watching for new items.

    Pros

    • No installation; run it from anywhere and delete it when done
    • Clear signed, third-party and unsigned markers make odd items easy to spot
    • Optional VirusTotal checks with a free personal API key

    Cons

    • On-demand only, with no real-time protection
    • Lists legitimate apps alongside threats, so results need interpretation
    • Runs only on macOS
    Visit KnockKnock Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

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

    Is KnockKnock a good BlockBlock alternative?

    Verified facts

    4 of 4 verified
    License
    GPL-3.0
    Checked Nov 1, 2026github.com(opens source in a new tab)
    Platforms
    macOS 10.15+
    Checked Nov 1, 2026objective-see.org(opens source in a new tab)
    Installation
    None needed
    Checked Nov 1, 2026objective-see.org(opens source in a new tab)
    VirusTotal
    Optional, with API key
    Checked Nov 1, 2026objective-see.org(opens source in a new tab)
  2. Malwarebytes logo

    2. Malwarebytes

    Best for: People who want a familiar anti-malware scanner across several platforms

    Free plan + paidWindows, macOS, Android, iOS

    62.6

    score / 100

    Why switch from BlockBlock

    A full scanner with real-time protection that detects known Mac malware rather than leaving each decision to you.

    Pros

    • Free scanner is handy for cleaning up an already infected machine
    • One subscription covers Windows, Mac, Android and iOS devices
    • Paid plans include a scam and ad blocking browser extension

    Cons

    • Real-time protection requires a paid subscription
    • Higher tiers bundle a VPN and identity services some people won't need
    • Feature set differs between operating systems
    Visit Malwarebytes Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

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

    Is Malwarebytes a good BlockBlock alternative?

    Verified facts

    4 of 4 verified
    Free version
    Cleanup scanner
    Checked Nov 1, 2026malwarebytes.com(opens source in a new tab)
    Starting price
    $59.99/year
    Checked Nov 1, 2026malwarebytes.com(opens source in a new tab)
    Money-back guarantee
    60 days
    Checked Nov 1, 2026malwarebytes.com(opens source in a new tab)
    Platforms
    Windows, Mac, Android, iOS
    Checked Nov 1, 2026malwarebytes.com(opens source in a new tab)
  3. ClamXAV logo

    3. ClamXAV

    Best for: Mac-only homes and businesses wanting a light, long-running antivirus subscription

    PaidmacOS

    59.6

    score / 100

    Why switch from BlockBlock

    Mac-only antivirus with scheduled and background scans, for people who want signature detection.

    Pros

    • Made only for macOS, with background and scheduled scanning
    • Business plans add command-line control and central management
    • Long-running product with a 30-day free trial

    Cons

    • No free tier once the trial ends
    • Mac only, with no Windows or mobile apps
    • No bundled VPN or browser protection extension
    Visit ClamXAV Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

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

    Is ClamXAV a good BlockBlock alternative?

    Verified facts

    5 of 5 verified
    Free trial
    30 days
    Checked Oct 30, 2026clamxav.com(opens source in a new tab)
    Home plan
    Up to 3 Macs
    Checked Oct 30, 2026clamxav.com(opens source in a new tab)
    Business features
    Command-line control
    Checked Oct 30, 2026clamxav.com(opens source in a new tab)
    Student discount
    30% off
    Checked Oct 30, 2026clamxav.com(opens source in a new tab)
    Owner
    Canimaan Software Ltd
    Checked Oct 30, 2026clamxav.com(opens source in a new tab)

The best BlockBlock alternative for…

The highest-ranked app in this list for each need.

KnockKnock logo

Best BlockBlock alternative for most people

KnockKnock

Same developer and also free; scans for everything already set to persist instead of watching for new items.

KnockKnock logo

Best BlockBlock alternative for a free option

KnockKnock

Same developer and also free; scans for everything already set to persist instead of watching for new items.

Malwarebytes logo

Best BlockBlock alternative for a free plan you can upgrade

Malwarebytes

A full scanner with real-time protection that detects known Mac malware rather than leaving each decision to you.

ClamXAV logo

Best BlockBlock alternative for Mac

ClamXAV

Mac-only antivirus with scheduled and background scans, for people who want signature detection.

Malwarebytes logo

Best BlockBlock alternative for Windows

Malwarebytes

A full scanner with real-time protection that detects known Mac malware rather than leaving each decision to you.

Malwarebytes logo

Best BlockBlock alternative for iPhone and Android

Malwarebytes

A full scanner with real-time protection that detects known Mac malware rather than leaving each decision to you.

BlockBlock alternatives: common questions

What is the best alternative to BlockBlock?

KnockKnock ranks first right now. Same developer and also free; scans for everything already set to persist instead of watching for new items. Malwarebytes and ClamXAV follow it in our ranking.

Is there a free alternative to BlockBlock?

Yes. KnockKnock (open source) and Malwarebytes (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to BlockBlock?

None of the 3 alternatives in this list is open source.

Why do people switch from BlockBlock?

The complaints we hear most: does not detect or remove known malware the way a scanner does; alerts for legitimate installers need judgement from the user; macOS only, and requires Full Disk Access and system privileges.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces BlockBlock, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.