F

Fabraix

Red-teaming AI agents that continuously probe customer-facing AI for security, logic and alignment weaknesses: its Nyx harness attacks a chatbot, browser, voice or coding agent as a black box over many turns and returns findings with steps to reproduce.

StageUndisclosed

Founded2026

HeadquartersSan Francisco, USA

StatusPrivate

Product

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• Nyx Platform Sold on its own

  Autonomous adversarial-testing harness for AI agents: Nyx probes chatbots, autonomous, multi-agent, browser, voice and reinforcement-learning systems as a black box across multiple turns, returns findings with reproduction steps and can be run on a schedule or in CI; free for non-commercial research by application, with one-off scans and continuous plans priced by quote.

Similar products 72

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

PAPalo Alto NetworksPublicNyx and Prisma AIRS AI Red Teaming both list guardrails and safety; both also serve buyers who need to test and evaluate an AI agent and use AI to attack our own systems first; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareEAEnkrypt AIAcquiredNyx and Enkrypt AI both list guardrails and safety; both also serve buyers who need to use AI to attack our own systems first; Fabraix's scale not recorded; Enkrypt AI is acquired, with no independent scale; ships API service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareMMicrosoftPublicNyx and AI Red Teaming Agent both list guardrails and safety; both also serve buyers who need to test and evaluate an AI agent and use AI to attack our own systems first; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareZZscalerPublicNyx and Zscaler AI Red Teaming both list guardrails and safety; both also serve buyers who need to use AI to attack our own systems first; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareAAArthur AIEarly-stageNyx and Arthur Agent Development Toolkit both list guardrails and safety; both also serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareITInvisible TechnologiesLate-stageNyx and Synapse both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareJJFrogPublicNyx and JFrog AI Catalog both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareDDataikuLate-stageNyx and Dataiku Agent Management both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareHHiddenLayerEarly-stageNyx and HiddenLayer AI Attack Simulation both serve buyers who need to use AI to attack our own systems first; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareAAnacondaLate-stageNyx and AI Security & Guardrails both list guardrails and safety; both also serve buyers who need to use AI to attack our own systems first; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareSSAPPublicNyx and SAP AI Agent Hub both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareIIBMPublicNyx and IBM DataPower Interact Gateway both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareMAMaxim AIUndisclosedNyx and Maxim both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareCPCheck Point Software TechnologiesPublicNyx and AI Red Teaming both list guardrails and safety; both also serve buyers who need to use AI to attack our own systems first; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareHAHippocratic AILate-stageNyx and AI Call Supervisor both list guardrails and safety; both also serve buyers who need to test and evaluate an AI agent; Fabraix's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareGGlean (Glean Technologies)Late-stageNyx and Glean AI Gateway both list guardrails and safety; Fabraix's scale not recorded.1 of 2 capabilitiesShared product typeCompareSServiceNowPublicNyx and AI Control Tower both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareCCoArenaUndisclosedNyx and CoArena both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareCCyeraLate-stageNyx and Cyera Agent Guardian both list guardrails and safety; Fabraix's scale not recorded.1 of 2 capabilitiesShared product typeCompareLLiteLLMEarly-stageNyx and AI Gateway (LiteLLM Proxy) both list guardrails and safety; scale not recorded for either; ships AI agent, application and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareLLatentUndisclosedNyx and Latent both list guardrails and safety; scale not recorded for either; ships developer tool rather than the same layer.2 of 2 capabilitiesDifferent layerCompareSStacktraceUndisclosedNyx and Stacktrace Fleet both list guardrails and safety; scale not recorded for either; ships developer tool rather than the same layer.2 of 2 capabilitiesDifferent layerCompareWWorkdayPublicNyx and Agent Passport both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareWWriterLate-stageNyx and WRITER AI Studio both list guardrails and safety; Fabraix's scale not recorded.1 of 2 capabilitiesShared product typeCompareLLogosGuardUndisclosedNyx and LogosGuard AI Privacy Shield both list guardrails and safety; scale not recorded for either; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerComparePParloaLate-stageNyx and Parloa Lens both list guardrails and safety; Fabraix's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareHHueUndisclosedNyx and Hue both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareNNVIDIAPublicNyx and NVIDIA Open Agent Safety Platform both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareJJasperUndisclosedNyx and Jasper Brand IQ both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareSSentinelOnePublicNyx and Prompt Security both list guardrails and safety; Fabraix's scale not recorded.1 of 2 capabilitiesShared product typeCompareSSalesforcePublicNyx and MuleSoft Agent Fabric both list guardrails and safety; Fabraix's scale not recorded; ships AI agent, API service and 3 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareVLVeria LabsUndisclosedNyx and Veria both serve buyers who need to use AI to attack our own systems first; scale not recorded for either; ships AI agent rather than the same layer.Different layerComparePPapayaUndisclosedNyx and Papaya both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareCCodeRabbitLate-stageNyx and CodeRabbit Security both list guardrails and safety; Fabraix's scale not recorded; ships AI agent and developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareFAFiddler AILate-stageNyx and Fiddler AI Governance, Risk Management, and Compliance both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareLLemmaUndisclosedNyx and Lemma both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRRequestyEarly-stageNyx and Requesty AI Gateway both list guardrails and safety; scale not recorded for either; ships API service rather than the same layer.2 of 2 capabilitiesDifferent layerCompareOOpenHackUndisclosedNyx and OpenHack both serve buyers who need to use AI to attack our own systems first; scale not recorded for either; ships AI agent rather than the same layer.Different layerCompareTTolmoUndisclosedNyx and Tolmo both serve buyers who need to use AI to attack our own systems first; scale not recorded for either; ships AI agent rather than the same layer.Different layerCompareDDecaworkUndisclosedNyx and Decawork both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareOOktaPublicNyx and Okta for AI Agents both list guardrails and safety; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareGGuild.aiUndisclosedNyx and Guild agent control plane both list guardrails and safety; scale not recorded for either; ships agent platform and developer tool rather than the same layer.2 of 2 capabilitiesDifferent layerCompareMMicro1UndisclosedNyx and Cortex both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships data service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAAgnost AIUndisclosedNyx and Agnost AI both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareVVectaraEarly-stageNyx and Vectara Guardian Agents both list guardrails and safety; scale not recorded for either; ships AI agent, agent platform and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareOAORO AIUndisclosedNyx and ORO both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships data service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareTTrueFoundryEarly-stageNyx and TrueFoundry MCP Gateway both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareAHAll Hands AIEarly-stageNyx and Agent Control Plane both list guardrails and safety; scale not recorded for either; ships AI agent, agent platform and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerComparePPolyAIUndisclosedNyx and Wren both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships AI agent and agent platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRARetell AIUndisclosedNyx and Retell AI Conductor both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships agent platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAAutomation AnywhereUndisclosedNyx and AI Governance both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareRRogoLate-stageNyx and Watchtower both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareHHarnessLate-stageNyx and AI Evals both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.2 of 2 capabilitiesShared product typeComparePPalantirPublicNyx and AIP Evals both serve buyers who need to test and evaluate an AI agent; Fabraix's scale not recorded.1 of 2 capabilitiesShared product typeCompareAAmazonPublicNyx and AWS Continuum both serve buyers who need to use AI to attack our own systems first; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareDDatadogPublicNyx and Agent Observability both list guardrails and safety; Fabraix's scale not recorded; ships AI agent, API service and 3 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareSSonarLate-stageNyx and Sonar Vortex both list guardrails and safety; Fabraix's scale not recorded; ships AI agent and developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRAResemble AIEarly-stageNyx and Resemble Watermarker both list guardrails and safety; scale not recorded for either; ships API service and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAntigenUndisclosedNyx and Antigen both serve buyers who need to use AI to attack our own systems first; scale not recorded for either; ships AI agent rather than the same layer.Different layerCompareDDecagonLate-stageNyx and Experiments both serve buyers who need to test and evaluate an AI agent; Fabraix's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareKKore.aiLate-stageNyx and Arch AI both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships agent platform and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareLLivePersonAcquiredNyx and LivePerson Syntrix both serve buyers who need to test and evaluate an AI agent; Fabraix's scale not recorded; LivePerson is acquired, with no independent scale; ships AI agent, agent platform and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareEeGainPublicNyx and eGain Smart Evaluator both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareKKimptonUndisclosedNyx and Kimpton Koliseum and EvalRouter both serve buyers who need to test and evaluate an AI agent; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareBBroadcomPublicNyx and AgentMinder both list guardrails and safety; Fabraix's scale not recorded.1 of 2 capabilitiesShared product typeCompareDDatabricksLate-stageNyx and Unity Gateway both list guardrails and safety; Fabraix's scale not recorded.2 of 2 capabilitiesShared product typeCompareCClayLate-stageNyx and Claygent Builder both serve buyers who need to test and evaluate an AI agent; Fabraix's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareCCrescendoEarly-stageNyx and Optimization Agent both serve buyers who need to test and evaluate an AI agent; Fabraix's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareTTolokaUndisclosedNyx and Toloka Platform both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareHHoneyHiveEarly-stageNyx and HoneyHive both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareLLunaryUndisclosedNyx and Lunary both serve buyers who need to test and evaluate an AI agent; scale not recorded for either; ships developer tool rather than the same layer.1 of 2 capabilitiesDifferent layerCompareSSamaUndisclosedNyx and Sama GenAI both list guardrails and safety; scale not recorded for either.2 of 2 capabilitiesShared product typeCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Total funding

Not found · 19 Oct 2026

Pages read for this record state no funding total. Tried the home content, pricing and terms and the company's YC profile.

Valuation

Not found · 19 Oct 2026

Pages read for this record state no valuation. Tried the home content, pricing and terms and the company's YC profile.

Founded

Company disclosure · 19 Oct 2026

Own YC profile lists Founded: 2026; fabraix.com states no founding year.

Public listing

Not found · 19 Oct 2026

No listing on the pages read; treated as private.

Description

Official documentation · 19 Oct 2026

Site content file behind the script-rendered home page: "Fabraix builds frontier red-teaming AI agents that continuously find security vulnerabilities in customer-facing AI."

Open Fabraix in the directory

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