8 Best HexStrike AI MCP Agents Alternatives in 2026 (Open Source)
HexStrike AI MCP Agents is an advanced MCP server that lets AI agents (Claude, GPT, Copilot, etc.) autonomously run 150+ cybersecurity tools for automated pente. Specialized MCP server focused exclusively on cybersecurity tool integration for AI agents.
These 8 open-source tools do the same job. They are ordered by how closely they match HexStrike AI MCP Agents, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit |
|---|---|---|---|
| HexStrike AI MCP Agents(original) | 12.3k | +1,022 | 2026-08-03 |
| PentAGI | 25.1k | +2,096 | 2026-09-29 |
| Anthropic-Cybersecurity-Skills | 33.6k | +2,802 | 2026-08-31 |
| SWE-agent | 20.4k | +254 | 2026-07-16 |
| agentic-radar | 1.1k | +20 | 2025-11-27 |
| SkillSpector | 18.8k | +1,565 | 2026-09-30 |
| Promptfoo | 25.6k | +1,117 | 2026-09-30 |
| Activepieces | 24.8k | +2,068 | 2026-09-30 |
| Kestra | 28.6k | +2,380 | 2026-09-30 |
1. PentAGI
Fully autonomous AI Agents system capable of performing complex penetration testing tasks
What sets it apart: Combines autonomous AI agents with professional penetration testing capabilities in fully isolated Docker environments.
Best for: security professionals conducting automated penetration tests; AI researchers building autonomous security agents; ethical hackers needing isolated testing environments
2. Anthropic-Cybersecurity-Skills
817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud
What sets it apart: The largest open-source library of cybersecurity skills specifically structured for integration into AI agents.
Best for: Enhancing AI agents with cybersecurity knowledge; Security research and authorized penetration testing simulations; Educational purposes in cybersecurity
3. SWE-agent
SWE-agent takes a GitHub issue and tries to automatically fix it, using your LM of choice. It can also be employed for offensive cybersecurity or competitive coding challenges. [NeurIPS 2024]
What sets it apart: Princeton/Stanford research project achieving SoTA on SWE-bench — the most rigorous benchmark for automated software engineering — with a simple, hackable design that leaves maximal agency to the LLM
Best for: Automated bug fixing and issue resolution in GitHub repos; Research on AI-driven software engineering capabilities
4. agentic-radar
A security scanner for your LLM agentic workflows
What sets it apart: The first dedicated security scanner specifically designed for agentic AI workflows, combining static analysis with runtime adversarial testing and automatic prompt hardening — no other tool maps agent vulnerabilities to OWASP AI security frameworks
Best for: Security teams auditing agentic AI systems before production deployment; DevOps teams integrating AI security scanning into CI/CD pipelines
5. SkillSpector
Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, security risks, prompt injection, data exfiltration, and supply-chain risks in
What sets it apart: Specialized security scanner focused exclusively on AI agent skills with 71 vulnerability patterns across 17 risk categories.
Best for: Security teams vetting agent skills; Developers installing third-party agent skills; Organizations implementing agent skill governance
6. Promptfoo
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, Llama, and more. Simple declarative configs with command line and
What sets it apart: Unlike LangSmith (production observability) or Langfuse (logging), promptfoo is the only open-source tool combining eval + red teaming + CI/CD code scanning — now backed by OpenAI while remaining fully MIT-licensed
Best for: Teams hardening LLM apps against prompt injection and jailbreaks with automated red teaming; Engineering teams adding LLM eval regression tests to CI/CD pipelines
7. Activepieces
AI Agents & MCPs & AI Workflow Automation • (~400 MCP servers for AI agents) • AI Automation / AI Agent with MCPs • AI Workflows & AI Agents • MCPs for AI Agent
What sets it apart: Largest open source MCP toolkit with 280+ pieces automatically available as MCP servers for LLM integration.
Best for: Building AI agents with MCP integration; Creating extensible AI workflows; Technical users wanting TypeScript customization
8. Kestra
Event Driven Orchestration & Scheduling Platform for Mission Critical Applications
What sets it apart: Combines traditional workflow orchestration with AI-native features including built-in MCP server and AI agent task types.
Best for: Orchestrating AI agent workflows; Building RAG pipelines; Integrating AI agents with MCP tools
FAQ
- What are the best alternatives to HexStrike AI MCP Agents?
- The closest open-source alternatives to HexStrike AI MCP Agents are PentAGI, Anthropic-Cybersecurity-Skills and SWE-agent, followed by agentic-radar, SkillSpector and Promptfoo. They are ranked by how closely they match what HexStrike AI MCP Agents does.
- Which HexStrike AI MCP Agents alternative is the most popular?
- Anthropic-Cybersecurity-Skills has the most GitHub stars among HexStrike AI MCP Agents alternatives, with 33,622 stars.
- Which HexStrike AI MCP Agents alternative is the most actively maintained?
- By recent activity, Kestra (1,455 commits in the last 90 days) is the most actively developed alternative.