CISO Tribune

Vendor comparison · 2 companies

Fiddler AI vs KnowBe4

Fiddler AI sells the AI Control Plane, a platform for first-party and third-party agents from the creation layer to production. KnowBe4 sells attack simulation and training, email and collaboration security, and agent security through the KnowBe4 Platform. 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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  • Fiddler AI
  • KnowBe4
Fiddler AI vs KnowBe4: Products, Customers and Funding Compared
Fiddler AIFiddler AI sells the AI Control Plane, a platform for first-party and third-party agents from the creation layer to production.fiddler.aiKnowBe4KnowBe4 sells attack simulation and training, email and collaboration security, and agent security through the KnowBe4 Platform.knowbe4.com
What it sells
  • 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.
  • Security Awareness Training[4][5][7]Education on recognizing threats, reinforced with phishing and vishing simulations.
  • Cloud Email Security[10]A suite of AI-driven products for inbound and outbound email.
  • Defend[1][4][5][6][10][11]Inbound email protection against phishing, ransomware and business email compromise.
  • Prevent[5][10][12]Outbound email protection and data loss prevention.
  • Compliance Plus[13]Compliance training platform.
  • Student Edition[5]Security awareness training for academic institutions.
  • BreachSim[14]A free tool to identify network vulnerabilities.
  • Weak Password Test[15]A free tool that finds users with weak passwords.
Categories
Headquarters
Not stated on its pagesClearwater, United States
Founded
2018[1]2010[1]
Ownership and funding
Privately held[12]Owned by Vista Equity Partners since 2023[2][4][8][9]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • January 27, 2026Fiddler AI announced a $30 million Series C funding round led by RPS Ventures.[1]
  • May 5, 2026KnowBe4 launched a two-tier Security Awareness Training offering and a new AI defense agent for custom content creation.[7]
  • April 6, 2026Dashlane announced an integration with KnowBe4 that links credential risk detection to security training for at-risk users.[18]
G2 and Gartner Peer Insights
  • G2: listed, seen November 10, 2026[12]
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 4, 2026[8]
  • Gartner Peer Insights: listed, seen November 4, 2026[9]
Who it fits
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. 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.Not written yet
Last verified
November 6, 2026September 27, 2026

Where they overlap

  • Fiddler AI and KnowBe4 are both filed under AI model and agent security.

Where they differ, field by field

  • Fiddler AI's primary category is AI model and agent security; KnowBe4's is Security awareness training.
  • Fiddler AI is also filed under AI governance and AI firewalls and guardrails. KnowBe4 is also filed under Human risk management and Email security.
  • Fiddler AI lists Agentic Observability, ML Observability, Fiddler Centor Models and Agent Registry. KnowBe4 lists Security Awareness Training, Cloud Email Security, Defend, Prevent, Compliance Plus and 3 more.
  • KnowBe4 is headquartered in Clearwater, United States.
  • Fiddler AI was founded in 2018. KnowBe4 was founded in 2010.
  • Fiddler AI is privately held. KnowBe4 is owned by Vista Equity Partners, since 2023.

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.

What it sells: KnowBe4

What Security Awareness Training does[4][5][7]
KnowBe4 says it delivers timely, personalized education that helps people recognize threats. Lessons are reinforced with realistic phishing and vishing simulations.
What Cloud Email Security does[10]
KnowBe4 Cloud Email Security is a suite of AI-driven products designed to detect and prevent advanced email threats across inbound and outbound communication. Contextual banners and prompts are delivered at the point of risk.
What Defend does[1][4][5][6][10][11]
Defend detects and blocks phishing, ransomware and business email compromise with behavioral AI and self-learning threat models. Defend inserts color-coded banners on flagged email and rewrites links, checking them at time of click. Defend integrates with Microsoft Defender for Office 365 through API-based connectivity.
What Prevent does[5][10][12]
Prevent monitors outbound email in real time and alerts users to risky behavior, such as accidental sends or misdirected emails. Prevent is integrated with Microsoft Outlook and Office 365. Prevent Enterprise adds misdirected content detection and custom DLP policies.
What Compliance Plus does[13]
Compliance Plus has a training library of 1000+ items of compliance training content. Compliance Plus offers targeted training for requirements such as HIPAA, PCI and GDPR. Organizations can upload SCORM-compliant content to the KnowBe4 LMS.
What Student Edition does[5]
The KnowBe4 Student Edition enables academic institutions to prepare students to identify and prevent modern cyberattacks. Its training content covers phishing, BYOD risks, password hygiene, social media risks and campus scams.
What BreachSim does[14]
BreachSim is a free tool from KnowBe4 to identify network vulnerabilities. BreachSim tests over 12 realistic data exfiltration scenarios following the MITRE ATT&CK framework.
What Weak Password Test does[15]
The Weak Password Test is a free tool to help IT Administrators know which users have passwords that are easily guessed. It checks the Active Directory and generates a report of users with weak passwords.

Questions about Fiddler AI and KnowBe4

What do Fiddler AI and KnowBe4 sell?
Fiddler AI sells Agentic Observability, ML Observability, Fiddler Centor Models and Agent Registry. KnowBe4 sells Security Awareness Training, Cloud Email Security, Defend, Prevent, Compliance Plus and 3 more.
Are Fiddler AI and KnowBe4 in the same category?
They share AI model and agent security. Fiddler AI's primary category is AI model and agent security and KnowBe4's is Security awareness training.
Where are Fiddler AI and KnowBe4 headquartered?
KnowBe4 is headquartered in Clearwater, United States.
When were Fiddler AI and KnowBe4 founded?
Fiddler AI was founded in 2018. KnowBe4 was founded in 2010.
Who owns Fiddler AI and KnowBe4?
Fiddler AI is privately held. KnowBe4 is owned by Vista Equity Partners, since 2023.
Who are Fiddler AI and KnowBe4 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 Fiddler AI and KnowBe4 announced recently?
January 27, 2026: Fiddler AI announced a $30 million Series C funding round led by RPS Ventures. May 5, 2026: KnowBe4 launched a two-tier Security Awareness Training offering and a new AI defense agent for custom content creation.

About Fiddler AI

Fiddler AI sells the AI Control Plane, a platform for first-party and third-party agents from the creation layer to production. Fiddler combines continuous evaluation, monitoring, enforceable policy and auditable governance for enterprises. Fiddler Centor Models power guardrails and evaluations in-environment, with no external LLM API calls.[2][3]

Fiddler Agentic Observability monitors every layer of the agentic hierarchy from application health to agent interactions to individual spans. Fiddler ML Observability provides root cause analysis and fairness metrics such as disparate impact, demographic parity and equal opportunity. Fiddler Guardrails enforce policy inline, at the agent's request and response path, in under 80ms. Fiddler detects and redacts PII, PHI and secrets on the same request, before a prompt reaches the model and before a response reaches the developer. The Free plan includes real-time guardrails powered by Fiddler Centor Models at under 80ms latency, protecting against hallucinations, toxicity, PII/PHI, prompt injection and jailbreak attempts. Fiddler tracks 100+ out-of-the-box and custom metrics including hallucination, toxicity, PII/PHI leakage and jailbreak attempts.[2][3][4][5][6]

Fiddler AI provides centralized governance and oversight for agents and predictive models across the enterprise, with a registry of your agents, enforced guardrails and the audit evidence needed to meet evolving regulatory requirements. 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 and regulations such as GDPR, HIPAA, NAIC, SR 11-7, NIST AI RMF, ISO/IEC 42001 and the EU AI Act. Guardrails run in your own environment, so prompts and responses never leave your infrastructure. Teams can monitor predictive models and agents for drift, bias and performance degradation, run deep diagnostics to find root causes, and create custom reports for MRM and compliance reviews. Fiddler extends governance to the creation layer, monitoring the IDE, CLI and MCP boundary to validate tool invocations against allowlists, scan for secrets, and prevent coding agents from committing insecure code or accessing unauthorized repositories.[5][7]

Fiddler is offered in SaaS, VPC and AWS GovCloud. Fiddler can be deployed in any secure cloud environment or air-gapped. Fiddler states it is SOC 2 Type II compliant, with role-based access control and SSO. Fiddler states it is HIPAA ready. Fiddler AI Observability can run within Amazon SageMaker Studio. Fiddler is model- and cloud-agnostic, working across Azure OpenAI, Amazon Bedrock, LangGraph and 100+ other providers. The Developer plan is usage-based at $0.002 per trace and adds unified observability for agentic and predictive systems, custom evaluators and SSO. The Enterprise plan adds flexible deployment of SaaS, VPC or on-premises, along with white-glove support with a named Customer Success Manager and customized onboarding.[3][5][8]

Fiddler AI is used by organizations deploying agents across all industries, as well as highly regulated industries like 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. Fiddler positions its AI Observability and Security platform as the Unified AI Command Center for insurers. Fiddler provides a unified AI observability and security platform for healthcare organizations. Fiddler describes itself as the control plane for AI agents in financial services, covering monitoring, policy and governance. Financial institutions deploying AI across underwriting, fraud and trading rely on Fiddler for unified observability, policy enforcement and regulatory-ready audit trails. Fiddler monitors Natural Language Processing and Computer Vision models to track and get real-time alerts on anomalies and data drift. Fiddler explains predictions in ML models powering autonomous vehicles, such as aerial drones and unmanned underwater vehicles. Fortune 100 organizations use Fiddler for agentic and predictive applications. For customer-facing agents, Fiddler governs agents built in-house or integrated from third-party providers in a unified dashboard with audit evidence for GDPR, CCPA, HIPAA and NAIC compliance.[2][3][4][5][6][8][9][10]

Fiddler's founders began with explainability and then expanded to observability to track how models change over time. Fiddler describes itself today as the Control Plane for AI Agents. IQT first invested in Fiddler in 2019.[2][4][6][8][10][11]

Fiddler AI on the record

Sources

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

KnowBe4 full record

  1. [1]About usKnowBe4 · knowbe4.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]Vista equity partners completes acquisition of knowbe4KnowBe4 · knowbe4.com · published February 1, 2023 · Tier A
  3. [3]Contact usKnowBe4 · knowbe4.com · undated page, accessed September 27, 2026 · Tier A
  4. [4]KnowBe4 | Secure Your Digital Workforce: Human + AIKnowBe4 · undated page, accessed October 26, 2026 · Tier A
  5. [5]KnowBe4 Student Edition | KnowBe4KnowBe4 · undated page, accessed October 26, 2026 · Tier A
  6. [6]Warning: Attackers Are Using Calendar Invite Files to Evade Security FiltersKnowBe4 · undated page, accessed October 26, 2026 · Tier A
  7. [7]KnowBe4 Launches AI-Native Attack Simulation & Training Product and Twelfth AI AgentBusiness Wire · published May 5, 2026 · Tier A
  8. [8]KnowBe4 Security Awareness Training Reviews 2026 - G2G2 · undated page, accessed October 26, 2026 · Tier C
  9. [9]KnowBe4 Reviews, Ratings & Features 2026 | Gartner Peer InsightsGartner Peer Insights · undated page, accessed October 26, 2026 · Tier C
  10. [10]Cloud Email Security for Microsoft 365 | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  11. [11]Pricing | DefendKnowBe4 · undated page, accessed November 4, 2026 · Tier A
  12. [12]Pricing | Prevent | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  13. [13]Compliance Plus: Compliance Training Platform | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  14. [14]BreachSim | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  15. [15]Weak Password Test | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  16. [16]Security Culture Report Analysis Center | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  17. [17]KnowBe4 Customer Success | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A
  18. [18]Dashlane Launches First-of-its-Kind Integration with KnowBe4 to Transform Security Awareness into Proactive DefensePR Newswire · published April 6, 2026 · Tier A

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