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KnockKnock alternatives: 3 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave KnockKnock: on-demand only, with no real-time protection, and lists legitimate apps alongside threats, so results need interpretation. We ranked 3 alternatives by how directly each one replaces KnockKnock, then by reviews, real visits and how recently each app's facts were checked against its own website. BlockBlock currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1BlockBlock logoBlockBlockOpen sourceNomacOS5 of 566.5
2Malwarebytes logoMalwarebytesFree plan + paidNoWindows, macOS, Android +14 of 462.6
  1. BlockBlock logo

    1. BlockBlockTop pick

    Best for: Mac users and admins who want to approve anything that sets itself to run at login or boot

    Open sourcemacOS

    66.5

    score / 100

    Why switch from KnockKnock

    Same developer; watches persistence locations continuously and alerts as new items are added.

    Pros

    • Catches persistence attempts as they happen instead of after a scheduled scan
    • Alerts show the responsible process, signing details and VirusTotal results
    • Free and open source, made by a non-profit with a long Mac security track record

    Cons

    • 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
    Visit BlockBlock 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 BlockBlock a good KnockKnock alternative?

    Verified facts

    5 of 5 verified
    License
    GPL-3.0
    Checked Oct 29, 2026github.com(opens source in a new tab)
    What it monitors
    Persistence locations
    Checked Oct 29, 2026objective-see.org(opens source in a new tab)
    Platforms
    macOS 10.15+
    Checked Oct 29, 2026objective-see.org(opens source in a new tab)
    Monitoring engine
    Apple Endpoint Security Framework
    Checked Oct 29, 2026objective-see.org(opens source in a new tab)
    Owner
    Objective-See Foundation (non-profit)
    Checked Oct 29, 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 KnockKnock

    Scans for and removes known malware automatically instead of only listing startup items.

    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 KnockKnock 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)

The best KnockKnock alternative for…

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

BlockBlock logo

Best KnockKnock alternative for most people

BlockBlock

Same developer; watches persistence locations continuously and alerts as new items are added.

BlockBlock logo

Best KnockKnock alternative for a free option

BlockBlock

Same developer; watches persistence locations continuously and alerts as new items are added.

Malwarebytes logo

Best KnockKnock alternative for a free plan you can upgrade

Malwarebytes

Scans for and removes known malware automatically instead of only listing startup items.

ClamXAV logo

Best KnockKnock alternative for Mac

ClamXAV

Signature-based Mac antivirus with scheduled scans for people who want detection, not just inventory.

Malwarebytes logo

Best KnockKnock alternative for Windows

Malwarebytes

Scans for and removes known malware automatically instead of only listing startup items.

Malwarebytes logo

Best KnockKnock alternative for iPhone and Android

Malwarebytes

Scans for and removes known malware automatically instead of only listing startup items.

KnockKnock alternatives: common questions

What is the best alternative to KnockKnock?

BlockBlock ranks first right now. Same developer; watches persistence locations continuously and alerts as new items are added. Malwarebytes and ClamXAV follow it in our ranking.

Is there a free alternative to KnockKnock?

Yes. BlockBlock (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 KnockKnock?

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

Why do people switch from KnockKnock?

The complaints we hear most: on-demand only, with no real-time protection; lists legitimate apps alongside threats, so results need interpretation; runs only on macOS.

How is this list ranked?

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