Which Security AI Agents tools are open source?

1 of the 9 we track have a public repository: Promptfoo (MIT). 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 $29 to $29, averaging about $29/month across 4 tools that publish a figure. 5 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 9 AI Tools

SOC platforms, threat triage, alert correlation and deduplication, incident response, vulnerability management, agent-l… 9 tracked on AgentsIndex, with pricing and licences checked.

9 listed5 free1 open source

Reviewed by AgentsIndex · Updated Aug 13, 2026

The Security AI Agents catalog on AgentsIndex lists 9 tools built for this job. Most are built for engineers, data scientists, enterprises. Open source is rarer here than elsewhere on the index — 1 of 9, against 27% overall — so most choices are a vendor relationship rather than a repository.

Security AI Agents compared

The 5 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
Simbian	$29/mo	Yes	Self-Hosted · SOC 2 · ISO 27001
Straiker Defend AI	$29/mo	Yes	SOC 2
Vijil	$29/mo	Yes	Self-Hosted · SOC 2
NeuralTrust	$29/mo	Yes	—

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.

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.

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.

CalypsoAI

AI security controls for models, apps, and agents.

Security AI Agents

CalypsoAI secures AI models, apps, and agents with adversarial testing, runtime protection, and observability.

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 9 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?