Which Security AI Agents tools are open source?

2 of the 10 we track have a public repository: Promptfoo (MIT), HOL Guard (Apache-2.0). Licence matters more than the label — check whether the licence covers the production server as well as the library.

Can you use Security AI Agents tools for free?

Published monthly prices run from $0.3475 to $29, averaging about $23/month across 5 tools that publish a figure. 6 offer a free tier. The rest quote contact-sales or usage-based pricing, where the sticker price matters less than your usage volume.

Security AI Agents: Browse 10 AI Tools

SOC platforms, threat triage, alert correlation and deduplication, incident response, vulnerability management, agent-l… 10 tracked on AgentsIndex, with pricing and licences checked.

10 listed6 free2 open source

Reviewed by AgentsIndex · Updated Oct 7, 2026

The Security AI Agents catalog on AgentsIndex lists 10 tools built for this job. Most are built for developers, marketers, enterprises. 6 have a free option, 2 are open source.

Security AI Agents compared

The 6 most-used tools in this category, by published pricing. Everything we know about each one is on its listing.

Tool	Price from	Free tier	Deployment & compliance
Promptfoo	Free	Yes	Self-Hosted · Open Source · ISO 27001
Straiker Defend AI	$29/mo	Yes	SOC 2
NeuralTrust	$29/mo	Yes	—
Simbian	$29/mo	Yes	Self-Hosted · SOC 2 · ISO 27001
Vijil	$29/mo	Yes	Self-Hosted · SOC 2
HOL Guard	$0.3475/mo	Yes	Open Source

Foreman Intelligence

Turns existing camera feeds into alerts, evidence, and plain-language answers.

Security AI Agents

API

Foreman Intelligence turns existing camera feeds into alerts, evidence, and answers. Works with up to 32 cameras and supports an API for developers.

HOL Guard

Policy enforcement for AI agents that checks risky actions before execution.

Security AI Agents

Open sourceAPI

HOL Guard checks risky AI agent actions before execution on supported harnesses, with runtime protection, policy routing, and review workbench. Plans start free.

Holistic AI

Enterprise AI governance with discovery, testing, and enforcement.

Security AI Agents

Holistic AI scans AI systems, runs 40+ test types, and enforces guardrails for enterprise governance teams.

Lasso Security

AI security platform for discovering, testing, and protecting agents and MCPs.

Security AI Agents

Lasso Security discovers AI agents and MCP servers, tests risk, and enforces runtime guardrails across enterprise AI stacks.

Vijil

Enterprise AI agent trust platform for testing, guarding, and improving agents.

Security AI Agents

API

Vijil evaluates and protects AI agents with VIJIL DIAMOND, DOME, and DARWIN, plus on-premises deployment and a REST API for any stack.

NeuralTrust

Enterprise AI security for agent behavior, policy enforcement, and monitoring.

Security AI Agents

API

NeuralTrust secures AI agents with Prompt Guard, Behavioral Threat Detection, and policy controls for LangChain, CrewAI, and AutoGen.

Straiker Defend AI

Enterprise AI security for live agents, prompts, and tool calls.

Security AI Agents

API

Straiker Defend AI inspects prompts and tool calls, with AI Agent Discovery, Runtime Security, and MCP Security for enterprise teams.

Simbian

AI security operations with SOC, hunt, and pentest agents.

Security AI Agents

Simbian runs AI SOC, threat hunt, and pentest agents across 100+ tools for security teams.

Lakera Guard

Real-time AI security for prompts, outputs, and workflows.

Security AI Agents

API

Lakera Guard filters AI prompts and outputs in real time with policy controls, starting from API-first deployment and used by Dropbox and Slack.

Promptfoo

AI security testing with red teaming, guardrails, and code scanning.

Security AI Agents

Open source

Promptfoo automates AI security testing with red teaming, guardrails, and code scanning. Community is Free Forever; Enterprise and On-Premise are custom.

Security AI Agents: Browse 10 AI Tools

Security AI Agents compared

About Security AI Agents on AgentsIndex

Which Security AI Agents tools are open source?

Can you use Security AI Agents tools for free?