Dev tools · alternatives · 2026

24 alternatives to DefendStack Suite Appsec

Open source defense for your entire stack

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Warestack▲444

   Agentic guardrails for safe releases

   2025 · warestack.com · its alternatives →

2. 2
   AppSec360▲53

   Check your application's mapped security controls

   2021 · its alternatives →

3. 3
   Open Source Security Page▲223

   Easily build a security page on your website

   2018 · its alternatives →

4. 4SZ
   SecureBuild – Zero-CVE Images That Pay OSS Projects▲40

   We're launching SecureBuild: https://securebuild.com — a new way for open source projects and maintainers to earn revenue by partnering with and endorsing our Zero-CVE container images of their project. We’ve spent the last decade at Replicated (https://news.ycombinator.com/item?id=9841243) helping commercial and open source software vendors securely distribute their apps to enterprise environments. During that time, we saw firsthand how hard it is for maintainers to fund their work, and how increasingly demanding enterprises have become when it comes to demonstrable…

   2025 · securebuild.com · its alternatives →

5. 5
   Defend▲2

   Open-source guardrails for LLM apps

   Apr 2026 · its alternatives →

6. 6
   The Firewall Appsec Platform▲9

   Democratising Cybersecurity

   2025 · thefirewall.org · its alternatives →

7. 7
   Awesome OSS Developer Security Tools▲100

   A curated list of free OSS developer-first security tools

   2022 · its alternatives →

8. 8WP
   Wallarm – Protect your web apps or APIs with fast Nginx-based instances▲95

   2016 · wallarm.com · its alternatives →

9. 9
   CrowdSec▲74

   The massively multiplayer firewall

   2021 · its alternatives →

10. 10
    The CrowdSec Console▲193

    Monitor cyber threats on your online services

    2022 · its alternatives →

11. 11
    Beagle Security for Enterprises▲259

    Boost enterprise app security with automated AI pentesting

    2024 · its alternatives →

12. 12
    GitGuardian Shield▲80

    Open sourced application to detect security vulnerabilities.

    2020 · its alternatives →

13. 13
    open-appsec▲3

    Automatic web application & API security using ML

    2023 · its alternatives →

14. 14
    Templarbit▲144

    Security for modern teams running software

    2017 · its alternatives →

15. 15
    AppSolid▲108

    Protect Android apps against hackers

    2016 · its alternatives →

16. 16FO
    Free open-source isolated browser for security▲71

    2021 · github.com · its alternatives →

17. 17AB
    App.build, an open-source AI agent that builds full-stack apps▲90

    2025 · app.build · its alternatives →

18. 18
    OTPfy▲65

    Secure your apps with magic links and one time passwords

    2021 · its alternatives →

19. 19
    Autsec▲66

    Automate tool to identify vulnerabilities in smart contracts

    2023 · its alternatives →

20. 20AK
    AppCanary – Keep vulnerable software off your servers▲108

    2015 · appcanary.com · its alternatives →

21. 21
    ThreatSlayer▲85

    Free enterprise grade security for your personal browser

    2023 · its alternatives →

22. 22
    Open Source Security Management by FOSSA▲66

    Automate app security with OSS vulnerability management

    2020 · its alternatives →

23. 23OS
    Open-source Developer Security tools▲15

    2022 · github.com · its alternatives →

24. 24
    AppArmory▲70

    Affordable mobile app protection for everyone

    2021 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →