AI Governance Safety & Evaluation Freemium

Fabraix

Adversarial verification and runtime security for AI agents

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PricingFreemium
Starting priceContact sales
Free planYes
Free trialYes
APIYes
Open sourceNo
DeploymentCloud
Last verifiedJuly 30, 2026
Overview

Tool overview

Fabraix is listed under AI Governance Safety & Evaluation AI tools.

Summary

What is Fabraix?

Fabraix builds Nyx for autonomous black-box adversarial testing and Arx for runtime defense of AI agents. It tests security, logic, alignment, prompt injection, tool use, and multi-turn failure modes.

Best fit

Best for

Adversarial testing and runtime defense for AI agents

Audience

Who is it for?

TeamsManagersSpecialistsOperatorsTechnical users
Recommendation

Decision note

Rechecked the product, pricing, documentation, security, terms, and current Y Combinator profile. Nyx black-box red teaming, Arx runtime defense, APIs, CI/CD use, a free application-based Research tier, custom Team/Enterprise plans, Google Cloud hosting, configurable retention, Fabraix, Inc., founders@fabraix.com, and 2026 founding were confirmed. A public free trial and affiliate program were not confirmed.

Capabilities

Key features

Runs autonomous black-box red-team scans

Tests security, logic, and alignment weaknesses

Uses more than 1,000 adversarial strategies

Supports CI/CD retesting and continuous coverage

Provides findings dashboards and remediation support

Offers runtime defense APIs through Arx

Workflows

Use cases

Red-team customer-facing AI agents

Test browser, voice, and multi-agent systems

Measure prompt-injection and tool-use risk

Retest agents after prompt or model changes

Add runtime checks for dangerous actions

Strengths

Pros

  • Requires no source code or model weights for Nyx
  • Publishes transparent pricing tiers
  • Offers both testing and runtime defense
  • Grounded in original adversarial-security research
Considerations

Limitations

Continuous testing can add operational cost. Confirm current product scope, security, retention, and commercial terms before deployment.

Cost

Pricing details

Pricing modelFreemium
Starting priceContact sales
Free planYes
Free trialYes
Pricing context

Billing options

Free research access by applicationCustom per-agent scanCustom monthly usage
Pricing context

Pricing note

Researchers can apply for $0 non-commercial Nyx access. One-off scans are custom-priced per agent, and continuous coverage is custom-priced monthly by usage. No separate time-limited free trial is published.

View official pricing
Compatibility

Supported languages

  • English
Connectivity

Integrations

Agent endpoints

URLs

Phone agents

CI/CD

Nyx API

Arx API

Specs

Technical details

PlatformsWeb, API
Multilingual supportUnknown
Login requiredYes
Open sourceNo
LicenseProprietary service; open-source Playground is separate
DeploymentCloud
CompanyFabraix, Inc.
Launch year2026
Editions / plansResearch Team Enterprise
Data confidenceHigh
Last verifiedJuly 30, 2026
Documentation → Data source →
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Answers

Frequently asked questions

Fabraix builds Nyx for autonomous black-box adversarial testing and Arx for runtime defense of AI agents. It tests security, logic, alignment, prompt injection, tool use, and multi-turn failure modes.
Adversarial testing and runtime defense for AI agents
The listed pricing model for Fabraix is Freemium. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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