Free Windows Security Alternatives

The best free alternative to Windows Security is Malwarebytes Anti-Malware. If that doesn't suit you, our users have ranked more than 100 alternatives to Windows Security and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Windows Security are Clam AntiVirus, Avast Free Antivirus, Spybot - Search & Destroy and Avira Antivirus.

Windows Security alternatives are mainly Anti-Virus Apps but may also be Anti-Malware Apps or Firewalls. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Windows Security.

Windows Security alternatives page was last updated

Windows Security

146

Free Personal • Proprietary
Anti-Malware App

Windows Security (known as Windows Defender Antivirus before Windows 10 May 2020 Update, Windows Defender before Windows 10...

More about Windows Security

Malwarebytes Anti-Malware
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Anti-Malware App
Anti-Virus App
Mac
Windows
Android
iPhone
Chrome OS
Android Tablet
iPad
Kindle Fire
118 Malwarebytes Anti-Malware alternatives
Malwarebytes Premium is smarter, faster, and lighter than ever before. Go beyond antivirus and stop worrying about online threats.
- - Malwarebytes Anti-Malware is the most popular Windows, Android, Mac & iPhone alternative to Windows Security.
- - Malwarebytes Anti-Malware is the most popular free alternative to Windows Security.
Suggest and vote on features
Malwarebytes Anti-Malware Features
1. Ad-freeMalwarebytes Anti-Malware doesn't contain any form of external advertising.
2. Block TrackersMalwarebytes Anti-Malware has a feature to block trackers from tracking you.
3. Built-in VPNMalwarebytes Anti-Malware has a built-in VPN feature that enhances your privacy and allows you to browse the web from anywhere.
4. LightweightMalwarebytes Anti-Malware consumes less device resources compared to similar apps.
5. Malware AnalysisMalwarebytes Anti-Malware can inspect a suspicious file or URL to detect potential threats.
6. PortableMalwarebytes Anti-Malware can be used from a USB stick or similar with no prior installation.
Process scanning
Heuristic Detection
Real-time protection
Multiple languages
CloudAV
Machine Learning Analyze
Ransomware Protection
Comments about Malwarebytes Anti-Malware as a Alternative to Windows Security
Most users think Malwarebytes Anti-Malware is a great Windows Security alternative.
brta2818
Its real-time scanner (if you've shelled out for the premium version) uses less system resources than that of Microsoft Defender.
Positive comment•
0

Guest
Malwarebytes is very popular and works well.
Positive comment•
-4
Clam AntiVirus
Is this is a good alternative?
Yes
No
Free • Open Source
Anti-Virus App
Anti-Malware App
Mac
Windows
Linux
BSD
108 Clam AntiVirus alternatives
Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic...
- - Clam AntiVirus is the most popular Linux alternative to Windows Security.
- - Clam AntiVirus is the most popular Open Source alternative to Windows Security.
Suggest and vote on features
Clam AntiVirus Features
1. Ad-freeClam AntiVirus doesn't contain any form of external advertising.
2. LightweightClam AntiVirus consumes less device resources compared to similar apps.
3. No TrackingClam AntiVirus will not track you or use your personal data.
4. Privacy focusedClam AntiVirus is considered a privacy friendly alternative.
5. Malware AnalysisClam AntiVirus can inspect a suspicious file or URL to detect potential threats.
Graphical User Interface
Avast Free Antivirus
Is this is a good alternative?
Yes
No
Free Personal • Proprietary
Anti-Malware App
Anti-Virus App
Mac
Windows
Android
iPhone
Android Tablet
iPad
158 Avast Free Antivirus alternatives
Avast Free Antivirus a the free for non-commercial and home usage antivirus solution from AVAST Software.
Suggest and vote on features
Avast Free Antivirus Features
1. No TrackingAvast Free Antivirus will not track you or use your personal data.
2. Malware AnalysisAvast Free Antivirus can inspect a suspicious file or URL to detect potential threats.
Browser Protection
Run file in a Sandbox
Heuristic Detection
Zero-Day Protection
Comments about Avast Free Antivirus as a Alternative to Windows Security
Almost everyone thinks Avast Free Antivirus is a great Windows Security alternative.
Guest
Don't trust these big-name security suites, they're crap and full of bloatware. Same goes for AVG, Avira, Comodo. When they get on your system they just take over and nag you to buy whatever...
Negative comment•
21
Spybot - Search & Destroy
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Anti-Malware App
Windows
Symbian S60
PortableApps.com
106 Spybot - Search & Destroy alternatives
Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications.
Suggest and vote on features
Spybot - Search & Destroy Features
1. PortableSpybot - Search & Destroy can be used from a USB stick or similar with no prior installation.
Multiple languages
Avira Antivirus
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Anti-Virus App
Anti-Malware App
Mac
Windows
86 Avira Antivirus alternatives
Avira Free Antivirus offers basic protection for your computer against dangerous viruses, worms, spy-ware, trojans and costly dialers.
Suggest and vote on features
Avira Antivirus Features
1. Built-in VPNAvira Antivirus has a built-in VPN feature that enhances your privacy and allows you to browse the web from anywhere.
Real-time protection
Built-in Antivirus
Promotion 😀
Get a 40% discount on Avira Prime for the first year

Opinions about Avira Antivirus as a Alternative to Windows Security
Some users think Avira Antivirus is a great Windows Security alternative, some don't.
Kaspersky AntiVirus
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Anti-Virus App
Anti-Malware App
Windows
92 Kaspersky AntiVirus alternatives
Kaspersky AntiVirus offers protection from a range of IT threats and provides the basic tools needed to keep your PC secure.
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Kaspersky AntiVirus Features
Built-in Firewall
On-screen Keyboard
Comments about Kaspersky AntiVirus as a Alternative to Windows Security
Most users think Kaspersky AntiVirus is a great Windows Security alternative.
Guest
Kaspersky Security Cloud Free Blocks non-dangerous Web Sites. It blocked Push Pay Web Site my church uses to make donations. It blocked my AT&T Digital Home phone site as well. Whitelisting did not help. November, 2020
Negative comment•
0

Nitsu29
Very good signature database and probably the best protection against Malware and Ransomware. Worth the money if you usually visit sites that can easily screw you over
Positive comment•
0
AdwCleaner
Is this is a good alternative?
Yes
No
Free • Proprietary
Anti-Malware App
Windows
62 AdwCleaner alternatives
AdwCleaner is an easy-to-use OS security utility that allows you to get rid of adware on your computer in seconds, by quickly scanning the system.
Suggest and vote on features
AdwCleaner Features
1. PortableAdwCleaner can be used from a USB stick or similar with no prior installation.
2. LightweightAdwCleaner consumes less device resources compared to similar apps.
3. Malware AnalysisAdwCleaner can inspect a suspicious file or URL to detect potential threats.
4. Ad-freeAdwCleaner doesn't contain any form of external advertising.
Standalone
Multiple languages
Comments about AdwCleaner as a Alternative to Windows Security
Almost everyone thinks AdwCleaner is a great Windows Security alternative.
Guest
This was recommended by some geeks.
Positive comment•
0
Bitdefender Antivirus
Is this is a good alternative?
Yes
No
Freemium • Proprietary
Anti-Virus App
Anti-Malware App
Mac
Windows
Android
Android Tablet
57 Bitdefender Antivirus alternatives
Bitdefender comes with real time scanning that is called Virus Shield and an auto-scan mode that checks your system when the computer is idle. Game mode is fully automated and will be enabled when it detects a full screen application running.
Suggest and vote on features
Bitdefender Antivirus Features
1. LightweightBitdefender Antivirus consumes less device resources compared to similar apps.
Minimalistic
Built-in Antivirus
Auto Update
Comments about Bitdefender Antivirus as a Alternative to Windows Security
Almost everyone thinks Bitdefender Antivirus is a great Windows Security alternative.
ImSebi
A good alternative you can get when you need something other than Windows Security....
Positive comment•
0

Guest
Recommended by some serious geeks. Some of them use it and seem happy with it.
Positive comment•
-1
ClamTk
Is this is a good alternative?
Yes
No
Free • Open Source
Anti-Virus App
Anti-Malware App
Linux
72 ClamTk alternatives
ClamTk is a graphical front-end for ClamAV, an open source antivirus engine for detecting trojans, viruses, malware & other malicious threats. It is designed to be an easy-to-use, lightweight, on-demand antivirus scanner for Linux systems.
Suggest and vote on features
ClamTk Features
1. LightweightClamTk consumes less device resources compared to similar apps.
2. Ad-freeClamTk doesn't contain any form of external advertising.
3. Malware AnalysisClamTk can inspect a suspicious file or URL to detect potential threats.
4. Privacy focusedClamTk is considered a privacy friendly alternative.
Comments about ClamTk as a Alternative to Windows Security
pros, cons and recent comments
tibi97427
Simply because it's not available on Windows
Negative comment•
-1
Tron Script
Is this is a good alternative?
Yes
No
Free • Open Source
System Cleaner
Anti-Malware App
Anti-Virus App
Windows
164 Tron Script alternatives
Tron is a collection of programs, tools, utilities, and Windows functions that are all scripted together. Those programs and such are designed to remove malware and bloatware, repair damaged operating systems, update old versions of very common applications, free up drive space...
Suggest and vote on features
Tron Script Features
1. Malware AnalysisTron Script can inspect a suspicious file or URL to detect potential threats.
Bloatware Remover