Alternatives

Products that do what LegacyShield does

Upgrade your security without replacing your legacy systems

1. 1LM
   Legacy Mac Proxy▲14

   2021 · jonathanalland.com

2. 2
   ActivShield▲117

   Control your website traffic with click and block technology

   2017

3. 3
   Project Shield▲95

   Protecting free expression from digital attacks

   2022

4. 4M3
   Mitmproxy 3.0 released, an open-source console-based proxy▲242

   2018 · mitmproxy.org

5. 5
   Shieldstral▲104

   Define safety at runtime for text and images

   Aug 2026 · mistral.ai

6. 6
   OpenShield▲15

   A new generation security layer for AI models

   2024

7. 7
   Proxy4u▲93

   Fast residential proxies for smooth web scraping - Proxy4u

   2024

8. 8
   GitGuardian Shield▲80

   Open sourced application to detect security vulnerabilities.

   2020

9. 9
   Cybershield▲7

   Website protection & CMS protection

   Nov 2025 · cybershield-waf.com

10. 10
    IPshield ▲3

    Real-Time IP Risk Scoring Platform

    May 2026 · ipshield.live

11. 11
    PromptShield▲4

    The world’s first LLM Firewall

    2025

12. 12
    PromptShield▲7

    Data loss prevention for GenAI

    Oct 2025

13. 13
    LTH Shield▲9

    Linux hardening & IPS for VPS — without the enterprise bill

    Aug 2026 · lthcybersecurity.com

14. 14DO
    Defguard – open-source security army knife (Identity,MFA,VPN,Yubikey)▲32

    2023 · github.com

15. 15
    VulnShield▲5

    Catch code vulnerabilities before they ship.

    Jul 2026 · vuln-shield.vercel.app

16. 16
    Website Blocker FaithShield (Christian)▲6

    Guard your eyes. Renew your mind. Browse with faith.

    2025

17. 17IP
    Intercepting proxy for semantic search over visited pages▲14

    2025 · github.com

18. 18
    CyberShieldAI▲7

    Your AI shield against digital threats

    2025 · github.com

19. 19
    ShieldProxy

    The invisible privacy shield for your server infrastructure.

    Jan 2026 · shieldproxy.cc

20. 20
    FIVESHIELD▲3

    FiveM DDoS protection that keeps you online.

    May 2026 · fiveshield.co

21. 21
    Axiom▲11

    Local desktop sandbox engine against Client-Side Scanning

    Jul 2026 · gabrielgigitashvili044-pixel.github.io

22. 22
    DevShield.▲7

    AI engineer that detects, diagnoses & fixes software bugs.

    Jul 2026 · devshield.site

23. 23AO
    archgw: open-source, intelligent proxy for AI agents, built on Envoy▲20

    Hi HN! This is Adil, Salman, Co and Shuguang and we're excited to introduce archgw [1], an open source intelligent proxy for agents built on Envoy [2]. Arch moves the critical but crufty work around safety, observability, and routing of prompts outside business logic. Arch is a uniquely intelligent infrastructure primitive, engineered with purpose-built fast LLMs [3] for tasks like intent detection over multi-turn, parameter identification and extraction, triggering single/multiple function calls, and offers convenience features to auto dispatch LLM calls for summarization based on data…

    2024 · github.com

24. 24
    AgentShield▲5

    A safety shield. One-click rollback when AI goes crazy.

    Jan 2026 · github.com

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