CISO Tribune

Vendor comparison · 2 companies

Bay vs Fiddler AI

Bay is an AI agent security platform that gives enterprises visibility into every agent across devices, browsers and cloud workloads, and control over what those agents do in real time. Fiddler AI sells the AI Control Plane, a platform for first-party and third-party agents from the creation layer to production. CISO Tribune files both under AI model and agent security. This page sets the two records side by side: what each sells, where it is based, who owns and funds it, the customers it names and its recent news, each fact numbered to its source.

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  • Bay
  • Fiddler AI
Bay vs Fiddler AI: Products, Customers and Funding Compared
BayBay is an AI agent security platform that gives enterprises visibility into every agent across devices, browsers and cloud workloads, and control over what those agents do in real time.bay.ioFiddler AIFiddler AI sells the AI Control Plane, a platform for first-party and third-party agents from the creation layer to production.fiddler.ai
What it sells
  • Bay[1][2][3][4][5][6][7][8][9]Bay is an AI agent security platform covering agents on devices, in browsers and in cloud workloads. Bay returns allow, ask, steer or block decisions on agent actions at runtime.
  • Lighthouse[6]Lighthouse is Bay's embedded agentic system that drafts policy from an organization's own agent activity.
  • Wave[3]Wave is the ephemeral binary Bay uses to deploy through an existing MDM or EDR.
  • Agentic Observability[2][4]Monitors every layer of the agentic hierarchy, from application health to agent interactions to individual spans.
  • ML Observability[2][5]Detects data and concept drift in predictive models and provides root cause analysis and fairness metrics.
  • Fiddler Centor Models[2][3][6]Power guardrails and evaluations in-environment, with no external LLM API calls.
  • Agent Registry[7]Lists every agent application in Fiddler, including first-party, third-party and coding agents.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
Not stated on its pages2018[1]
Ownership and funding
Not stated on its pagesPrivately held[12]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
Not stated on its pages
  • January 27, 2026Fiddler AI announced a $30 million Series C funding round led by RPS Ventures.[1]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 10, 2026[12]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
Not written yetFrom its own pages, Fiddler AI sells mainly to organizations deploying AI agents and predictive models, across all industries and in regulated industries such as financial services, healthcare, insurance and government. The typical users are software and AI engineers, data scientists, platform and DevOps teams, and security and compliance teams. Its pages address insurers, healthcare organizations and financial institutions deploying AI across underwriting, fraud and trading. Deployment options on the Enterprise plan are SaaS, VPC or on-premises.
Last verified
November 5, 2026November 6, 2026

Where they overlap

  • AI model and agent security is the primary category of both Bay and Fiddler AI.

Where they differ, field by field

  • Bay is also filed under Endpoint management and application control and Workforce AI usage security. Fiddler AI is also filed under AI governance and AI firewalls and guardrails.
  • Bay lists Bay, Lighthouse and Wave. Fiddler AI lists Agentic Observability, ML Observability, Fiddler Centor Models and Agent Registry.
  • Fiddler AI was founded in 2018.
  • Fiddler AI is privately held.

How they differ

CISO Tribune files both Bay and Fiddler AI under AI model and agent security as their primary category. Bay sells an AI agent security platform covering agents on devices, in browsers and in cloud workloads, and it returns allow, ask, steer or block decisions on agent actions at runtime. Fiddler AI sells Agentic Observability, ML Observability, Fiddler Centor Models and Agent Registry, and it describes itself as the Control Plane for AI Agents.

Bay maps every agent, MCP server, extension, model and skill on devices on its first scan, and it deploys through an existing MDM or EDR using Wave, an ephemeral binary, with no proxy in the path. Its Lighthouse system drafts policy from an organization's own agent activity, and Bay replays 30 days of agent history before enforcement. Fiddler AI monitors every layer of the agentic hierarchy and also covers predictive models, with drift detection, root cause analysis and fairness metrics. Its guardrails enforce policy inline in under 80ms and run in the customer's own environment, and it is offered in SaaS, VPC and AWS GovCloud.

Bay is a Series A stage company, and its enterprise customers include Micron Technology, Peloton and ClickUp. Fiddler AI was founded in 2018, is privately held, and announced a $30 million Series C funding round led by RPS Ventures on January 27, 2026. Fiddler AI says it is used in financial services, healthcare, insurance and government, and that Fortune 100 organizations use it.

What it sells: Bay

What Bay does[1][2][3][4][5][6][7][8][9]
Bay maps every agent, MCP server, extension, model and skill on devices on its first scan. Bay builds a contextual entity graph of the users, MCP servers, SaaS apps and access connected to each agent. Bay deploys with one script through an existing MDM and does not require a proxy. Bay keeps full transcripts of prompts, actions and MCP calls.
What Lighthouse does[6]
Lighthouse drafts policy from an organization's own agent activity. Users answer 7 questions about risk appetite, and Lighthouse recommends a setting for each question and builds the policy. Bay replays 30 days of agent history to show what a policy would do before enforcement.
What Wave does[3]
Bay is agentless and deploys through an existing MDM or EDR using Wave, an ephemeral binary. There is no persistent agent to maintain and no proxy in the path.

What it sells: Fiddler AI

What Agentic Observability does[2][4]
Fiddler Agentic Observability monitors every layer of the agentic hierarchy from application health to agent interactions to individual spans. Fiddler gives aggregated and granular visibility from application to session to agent to trace to span.
What ML Observability does[2][5]
Fiddler ML Observability provides root cause analysis and fairness metrics such as disparate impact, demographic parity and equal opportunity. Fiddler tracks performance, drift, data integrity and model bias to observe and improve model health.
What Fiddler Centor Models does[2][3][6]
Fiddler Centor Models power guardrails and evaluations in-environment, with no external LLM API calls. Customers can choose Fiddler Centor Models that run in their environment, custom evaluators for domain-specific logic, or external judges for advanced reasoning.
What Agent Registry does[7]
Agent Registry lists every agent application in Fiddler, including first-party, third-party and coding agents. Fiddler records evaluation and policy outcomes with full traceability and generates audit evidence aligned with frameworks such as GDPR, HIPAA, NAIC, SR 11-7, NIST AI RMF, ISO/IEC 42001 and the EU AI Act.

Questions about Bay and Fiddler AI

What do Bay and Fiddler AI sell?
Bay sells Bay, Lighthouse and Wave. Fiddler AI sells Agentic Observability, ML Observability, Fiddler Centor Models and Agent Registry.
Are Bay and Fiddler AI in the same category?
Yes. AI model and agent security is the primary category of both on CISO Tribune.
When were Bay and Fiddler AI founded?
Fiddler AI was founded in 2018.
Who owns Bay and Fiddler AI?
Fiddler AI is privately held.
Who are Bay and Fiddler AI sold to?
From its own pages, Fiddler AI sells mainly to organizations deploying AI agents and predictive models, across all industries and in regulated industries such as financial services, healthcare, insurance and government.
What have Bay and Fiddler AI announced recently?
January 27, 2026: Fiddler AI announced a $30 million Series C funding round led by RPS Ventures.

About Bay

Bay is an AI agent security platform that gives enterprises visibility into every agent across devices, browsers and cloud workloads, and control over what those agents do in real time. Bay describes AI endpoint security as protection for the AI agents, coding assistants and MCP servers running on employee devices. Bay was founded by three engineers who spent their careers in endpoint and API security. Bay is a Series A stage company.[2][3]

Teams run agents like Claude Code, Codex, Gemini CLI and GitHub Copilot in clusters, cloud workspaces and hosted sessions.[5]

Bay finds and maps agents first. On the first scan, Bay maps every agent, MCP server, extension, model and skill on devices, including ones nobody approved. Bay finds every agent, extension, CLI tool, MCP server, skill and model on employee devices. Bay builds a contextual entity graph of how everything connects: the user behind each agent, the MCP servers and SaaS apps it touches, and the access it holds. Bay scans every agent, package, extension, MCP server and skill for malicious indicators before approval. In the browser, Bay brings shadow AI into view, covering chatbots, extensions and embedded SaaS agents. In cloud environments, Bay discovers agents across virtual machines, Kubernetes, Coder workspaces and hosted sessions.[1][3][5][6][7]

Lighthouse, Bay's embedded agentic system, drafts policy from an organization's own agent activity. Users answer 7 questions about risk appetite, and Lighthouse recommends a setting for each question and builds the policy. Policies can be scoped by IdP group, device or runtime, and can set which MCP servers can read or write. Before enforcement, Bay replays 30 days of agent history to show what a policy would do before any user is affected. Bay also lets teams run any policy in simulation mode to see what it would allow, ask or block. At runtime, Bay enforces guardrails inline with the agentic action and returns allow, ask, steer or block in milliseconds. Bay can also prevent prompt injection attempts at runtime.[6]

Bay keeps records of agent activity. Bay keeps full transcripts of prompts, actions and MCP calls, traceable to the person behind each session. A metadata-only mode in Bay keeps prompts on the device when they must not leave it. Bay ties every prompt and agent action to a real identity, corporate or personal. Bay logs every policy change and agent action with who approved it and whether a person or an agent took it. Every decision in Bay is logged against the policy behind it, ready for auditors. Bay connects to an identity provider, so every policy applies to the right people and groups.[5][6][7][8]

Bay also checks configuration. Bay checks how every agent and AI tool is set up, across devices and cloud workloads, so risky settings can be fixed before an agent puts them to use. Bay spots bypass-permissions mode, sandboxes switched off and unrestricted tool access, rates how serious each one is and shows how to fix it. Bay finds the credentials, tokens and secrets that agents and MCP servers can read.[9]

Bay deploys with one script through an existing MDM and does not require a proxy to route traffic through. Bay deploys through an existing MDM or EDR using Wave, an ephemeral binary, so there is no persistent agent to maintain. Bay tells corporate AI accounts from personal ones, including in personal Chrome profiles. Bay's enterprise customers include Micron Technology, Peloton and ClickUp.[1][2][3][6][7][8]

Bay on the record

Sources

Bay full record

  1. [1]bay.ioBay · bay.io · undated page, accessed November 5, 2026 · Tier A
  2. [2]Security Researcher — Careers at BayBay · undated page, accessed November 10, 2026 · Tier A
  3. [3]AI Endpoint Security — BayBay · undated page, accessed November 10, 2026 · Tier A
  4. [4]About — BayBay · undated page, accessed November 10, 2026 · Tier A
  5. [5]Cloud Workspaces — BayBay · undated page, accessed November 10, 2026 · Tier A
  6. [6]Platform — BayBay · undated page, accessed November 10, 2026 · Tier A
  7. [7]Browser — BayBay · undated page, accessed November 10, 2026 · Tier A
  8. [8]AI Governance & Compliance — BayBay · undated page, accessed November 10, 2026 · Tier A
  9. [9]AI Security Posture — BayBay · undated page, accessed November 10, 2026 · Tier A

Fiddler AI full record

  1. [1]Fiddler Raises $30M Series C to Deliver the First Control Plane for AIFiddler AI · published January 27, 2026 · Tier A
  2. [2]fiddler.aiFiddler AI · fiddler.ai · undated page, accessed November 6, 2026 · Tier A
  3. [3]Fiddler AI: The Control Plane for Enterprise AI AgentsFiddler AI · undated page, accessed November 10, 2026 · Tier A
  4. [4]Fiddler AI Observability for Healthcare LLM ApplicationsFiddler AI · undated page, accessed November 10, 2026 · Tier A
  5. [5]Fiddler AI Control Plane for Financial Services | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  6. [6]Customer Experience AI Observability for Agents | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  7. [7]AI Governance, Risk Management, and Compliance (GRC) | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  8. [8]Fiddler AI Observability for Insurance LLM Applications | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  9. [9]AI Observability for Lending and Trading | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  10. [10]Government | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  11. [11]About Us | Fiddler AIFiddler AI · undated page, accessed November 10, 2026 · Tier A
  12. [12]Fiddler AI Reviews 2026: Details, Pricing, & FeaturesG2 · undated page, accessed November 10, 2026 · Tier C

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