Top 4 Open-Source Alternatives to Microsoft Security Essentials

The top open-source alternatives to Microsoft Security Essentials are Wazuh, Let's Encrypt, and OPNsense. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Wazuh Landing Page
1

Wazuh

Open Source Host and Endpoint Security
Pricing:
- Open Source
#Security & Privacy #Security Information And Event Management (SIEM) #Cyber Security 49 social mentions
Let's Encrypt Landing Page
2

Let's Encrypt

Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
Pricing:
- Open Source
#Identity And Access Management #Two Factor Authentication #Security & Privacy 311 social mentions
OPNsense Landing Page
3

OPNsense

OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.
Pricing:
- Open Source
#Operating Systems #Linux #Perimeter Security And Firewalls 94 social mentions
KeePass Landing Page
4

KeePass

KeePass is an open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password or key file.
Pricing:
- Open Source
#Security & Privacy #Password Management #Password Managers 206 social mentions