All analysis was generated autonomously, without human review. Scores are analytical opinions drawn from the cited public sources, without hands-on testing. They are not audits, certifications, investment reports, purchasing advice, or evaluations of quality.
Tenable's durability is strongest where an independent record can confirm it and thinnest on what the customer actually buys. A regulatory filing puts more than 40,000 customers and roughly 65 percent of the Fortune 500 behind the franchise, and Nessus is the reference vulnerability scanner the rest of the platform runs on. What that same filing concedes is the limit: some organizations build their own scanning in-house, often with open-source code, and platform vendors are absorbing exposure assessment into suites buyers already own. So the lock is distribution and the depth of platform integration more than the scan content alone. Wiring six exposure surfaces into one risk model is what makes leaving slow.
| Description | Public exposure-management company built on the Nessus vulnerability scanner. The Tenable One platform unifies vulnerability, cloud, identity, OT, web-app, and AI exposure across the attack surface and prioritizes risk. | [f1] |
|---|---|---|
| Founded | 2002 | [f2] |
| HQ | Columbia, Maryland, USA | [f3] |
| Latest funding | IPO July 2018 (Nasdaq: TENB) | [f2] |
| Deployment | SaaS | [f4] |
| Compliance | ISO 27001 | [f4] |
| Product | What it does |
|---|---|
| Tenable One | Exposure-management platform unifying vulnerability, cloud, identity, OT, web-app, and AI signals across the attack surface with 300-plus integrations. |
| Nessus | Vulnerability assessment scanner, trusted by tens of thousands of organizations with 2 million downloads, that powers the Tenable One platform. |
| Tenable Cloud Security | Cloud-native application protection (CNAPP) closing cloud exposure across configurations, identities, and workloads in multi-cloud environments. |
| Tenable Identity Exposure | Agentless identity-security solution that unifies Active Directory and Entra ID, maps attack paths, and hardens identity posture. |
| Tenable OT Security | Security for converged OT/IT environments, inventorying OT, IoT, and IT assets and surfacing cyber-physical exposures. |
| Tenable AI Exposure | Discovers shadow AI usage on connected platforms, detects prompt injection and jailbreaks, and enforces AI acceptable-use policy. |
AI Defense Matrix
| Govern | Identify | Protect | Detect | Respond | Recover | |
|---|---|---|---|---|---|---|
| AI-Workload Platforms Inference servers, training platforms, vector DB platforms, and the model-loading supply chain. | ||||||
| AI Orchestration Tools Agentic orchestration tools, plus their plugins, skills, hooks, system prompts, scaffolding, harnesses, configuration settings, and MCP clients on user devices. | ||||||
| AI-Generated Code Code produced by AI tools, AI-assisted reviews, AI-generated infrastructure-as-code and tests, and vibe-coded apps that bypass CI/CD. | ||||||
| AI Gateways & Routers MCP proxies and gateways, LLM routers, outbound AI-service traffic, shadow AI egress, and model-registry traffic. | ||||||
| AI Model Model weights, fine-tuning checkpoints, model cards, registries, AIBOM, and the third-party LLMs your enterprise consumes. | ||||||
| Training Data Datasets used for training, fine-tuning, and continued learning. | ||||||
| Runtime AI Data User prompts, inference inputs, RAG content, vector DB content, persistent agent memory, and interaction history. | ||||||
| AI Agent Identities AI agents as non-human principals, plus credentials, keys, permission scopes, service accounts, and delegation chains across agents and tools. |
Tenable AI Exposure discovers how employees and agents use AI platforms, surfaces shadow AI and misconfigurations, detects attacks such as prompt injection, and enforces AI acceptable use policies. It is mapped to the AI Defense Matrix. [f5]
Cyber Defense Matrix
| Identify | Protect | Detect | Respond | Recover | |
|---|---|---|---|---|---|
| Devices Workstations, servers, phones, tablets, storage, network devices, IoT infrastructure, and similar hardware. | |||||
| Applications Software, interactions, and application flows on the devices. | |||||
| Networks Connections and traffic flowing among devices and apps, plus communication paths. | |||||
| Data Content at rest, in transit, or in use across devices, apps, and networks. | |||||
| Users The people using the devices, apps, networks, and data. |
Vulnerability Management and Patch Management cover devices, Web App Scanning covers applications, OT Security covers networks, Cloud Security covers data, and Identity Exposure covers users. Tenable is mapped to the Cyber Defense Matrix. [f6]
How well the company can compete in its security market, scored across eight dimensions against public evidence.
| Dimension | Score |
|---|---|
| Problem Clarity How precisely the company defines its problem, with evidence the problem exists at the scale claimed. | 3/5 |
| Capability Depth How specific the technical capabilities are, with evidence beyond marketing claims such as docs, demos, and third-party validation. | 4/5 |
| Market Timing Whether the market is ready for this product, with evidence that buyers are actively seeking solutions. | 4/5 |
| Team Credibility Demonstrated domain expertise with public signals such as prior exits, publications, and industry recognition. | 4/5 |
| GTM Proof Evidence of actual traction (customers, revenue signals, partnerships) beyond stated intentions. | 5/5 |
| Funding Efficiency Whether funding matches go-to-market ambition, with signs of capital-efficient growth. | 4/5 |
| Category Clarity Whether the company creates or fits a recognizable category that buyers can quickly place in their stack. | 4/5 |
| Incumbent Defensibility How vulnerable the core value proposition is to absorption as a feature by a platform vendor. | 3/5 |
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A closer look at the company's product strategy, measuring how defensible it is against market forces and examining the eight areas behind it.
reinforce or reposition
| Dimension | Score |
|---|---|
| Value Delivery Does the product sell software as the product, or judgment, trust, or accountability with software as the delivery mechanism. | 1/3 |
| Switching Cost How expensive leaving is for a customer: data portability, integrations, learned workflows, network effects, regulatory data residency. | 2/3 |
| Compliance Moat Whether certifications, liability acceptance, or audit trails block an easy replacement. | 2/3 |
| Problem Complexity Whether the product requires ML, optimization, real-time systems, or years of specialized expertise. | 3/3 |
| Buyer Profile Whether buyers are SMB operators, mid-market IT teams, or regulated enterprises and governments with procurement gates. | 3/3 |
| Layer Whether the product is an end-user application, a platform with application features, or infrastructure other applications depend on. | 2/3 |
| Proprietary Data, Content, or IP Whether the product accumulates datasets, content licenses, or IP that a rival cannot recreate from scratch. | 1/3 |
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The reasoning for the scores, the strategy deep dive, the business risks, and more. AI access comes with the purchase, so your AI tools can read the full profile too. You keep 12 months of access.
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| Id | Source | Tier | Accessed |
|---|---|---|---|
| f1 | Tenable homepage, exposure-management framing | official | 2026-06-23 |
| f2 | Tenable, Inc. (Wikipedia), founding | research | 2026-06-14 |
| f3 | Tenable FY2025 results (GlobeNewswire), dateline | press | 2026-06-14 |
| f4 | AI Defense Matrix Catalog entry | other | 2026-06-13 |
| f5 | AI Defense Matrix Catalog mapping | other | 2026-06-23 |
| f6 | Tenable Vulnerability Management page | official | 2026-06-12 |
| Id | Source | Tier | Accessed |
|---|---|---|---|
| s1 | Tenable Holdings 10-K (FY2025), customer scale and concentration “At December 31, 2025, we had over 40,000 customers, including approximately 65% of the Fortune 500 and approximately 50% of the Global 2000 and large government agencies. In 2025, 2024 and 2023, no single customer represented more than 2% of our revenue.” | regulatory | 2026-06-27 |
| s2 | Tenable Holdings 10-K (FY2025), competition and substitution “Our competitors include: vulnerability management and assessment vendors, including Qualys and Rapid7 ... including CrowdStrike ... such as Palo Alto Networks and Wiz. Many organizations also choose to build their own solutions in-house, often using open-source code.” | regulatory | 2026-06-27 |
| s3 | Tenable Holdings 10-K (FY2025), revenue, operating result, cash flow “Revenue $ 999,405 $ 900,021 $ 798,710 Loss from operations (9,168) (6,856) (52,160) Net loss (36,118) (36,301) (78,284) Net cash provided by operating activities 266,750 217,476 149,855” | regulatory | 2026-06-27 |
| s4 | NVD CVE-2025-36630, SYSTEM-privilege file overwrite in Tenable Nessus (CVSS 8.4 High) “In Tenable Nessus versions prior to 10.8.5 on a Windows host, it was found that a non-administrative user could overwrite arbitrary local system files with log content at SYSTEM privilege.” | regulatory | 2026-06-27 |
| s5 | NVD CVE-2025-2263 (CVSS 9.8), critical flaw Tenable Research reported in Sante PACS Server “A stack-based buffer overflow exists if a long encrypted username or password is supplied by an unauthenticated remote attacker.” | regulatory | 2026-06-27 |
| s6 | Calcalist (Meir Orbach): Tenable acquires Apex Security for over $105 million “Despite having raised just $8.6 million, Apex is being acquired for more than $105 million ... Apex's Seed round was co-led by Sequoia Capital and Index Ventures, with participation from angel investors, most notably OpenAI CEO Sam Altman.” | press | 2026-06-27 |
| s7 | TechCrunch: Tenable CEO Amit Yoran dies; co-CEO transition “Before becoming Tenable's CEO in 2016, he held a number of roles, including president of RSA, founding CEO of NetWitness, and CEO of In-Q-Tel ... CFO Steve Vintz and COO Mark Thurmond appointed as co-CEOs in his place.” | press | 2026-06-27 |
| s8 | SecurityWeek: Tenable to acquire Vulcan Cyber for $150 million “Tenable has agreed to buy Vulcan for roughly $150 million, $147 million in cash and $3 million in stock. Customers will benefit from extended third-party data flows through integration with over 100 security products.” | press | 2026-06-27 |
| s9 | Tenable homepage, exposure-management framing and sensors “Native signals, exposure intelligence, and third-party data converge inside Tenable One to map the entire attack surface across your infrastructure, cloud, identity, OT, third party applications, and AI.” | official | 2026-06-27 |
| s10 | Tenable Nessus product page, adoption and tenure “Nessus is trusted by tens of thousands of organizations, with 2 million downloads worldwide. For over twenty-six years, this partnership has driven continuous innovation and optimization.” | official | 2026-06-27 |
| s11 | Tenable Identity Exposure, agentless Active Directory and Entra ID “The identity security solution is completely agentless and does not need privileged credentials, ensuring zero impact on production while delivering instant visibility without increasing your attack surface.” | official | 2026-06-27 |
| s12 | Tenable OT Security, converged OT/IT asset inventory “Build a complete inventory of OT, IoT, and IT assets. Use Safe Active Query to uncover deep device details, including firmware, backplane details, lifecycle data, and known vulnerabilities to eliminate blind spots.” | official | 2026-06-27 |
| s13 | Tenable AI Exposure, AI attack-surface coverage “Detect and stop AI-specific attacks such as prompt injection and jailbreak attempts, and contain risky or compromised AI agents before they cause damage.” | official | 2026-06-27 |
| s14 | Tenable Trust Center (SafeBase), downloadable compliance documents “Use Ask to quickly get answers to your questions without having to sift through the documents within the Trust Center.” | official | 2026-06-27 |
| s15 | Tenable FY2025 results, revenue and cash flow “full year revenue of $999.4 million, up 11% year-over-year; full year net cash provided by operating activities of $266.8 million; full year unlevered free cash flow of $277.0 million.” | press | 2026-06-27 |
| s16 | Wikipedia: Tenable, Inc., founders and listing “Founded September 16, 2002. Founders Ron Gula, Jack Huffard, Renaud Deraison. Traded as Nasdaq: TENB. Headquarters Columbia, Maryland.” | research | 2026-06-27 |
| s17 | Tenable FY2025 results, customers, analyst recognition, federal posture “Added 502 new enterprise platform customers and 5 net new six-figure customers ... Named a Leader in the 2025 Gartner Magic Quadrant for Exposure Assessment Platforms ... Announced agreement with GSA OneGov to further invest in FedRAMP-authorized cloud security capabilities.” | press | 2026-06-27 |
| Id | Source | Tier | Accessed |
|---|---|---|---|
| s1 | Tenable Holdings 10-K (FY2025), customer scale and concentration “At December 31, 2025, we had over 40,000 customers, including approximately 65% of the Fortune 500 and approximately 50% of the Global 2000 and large government agencies. In 2025, 2024 and 2023, no single customer represented more than 2% of our revenue.” | regulatory | 2026-06-27 |
| s2 | Tenable Holdings 10-K (FY2025), competition and substitution “Our competitors include: vulnerability management and assessment vendors, including Qualys and Rapid7 ... including CrowdStrike ... such as Palo Alto Networks and Wiz. Many organizations also choose to build their own solutions in-house, often using open-source code.” | regulatory | 2026-06-27 |
| s3 | Tenable Holdings 10-K (FY2025), revenue, operating result, cash flow “Revenue $ 999,405 $ 900,021 $ 798,710 Loss from operations (9,168) (6,856) (52,160) Net loss (36,118) (36,301) (78,284) Net cash provided by operating activities 266,750 217,476 149,855” | regulatory | 2026-06-27 |
| s4 | NVD CVE-2025-36630, SYSTEM-privilege file overwrite in Tenable Nessus (CVSS 8.4 High) “In Tenable Nessus versions prior to 10.8.5 on a Windows host, it was found that a non-administrative user could overwrite arbitrary local system files with log content at SYSTEM privilege.” | regulatory | 2026-06-27 |
| s5 | NVD CVE-2025-2263 (CVSS 9.8), critical flaw Tenable Research reported in Sante PACS Server “A stack-based buffer overflow exists if a long encrypted username or password is supplied by an unauthenticated remote attacker.” | regulatory | 2026-06-27 |
| s6 | Calcalist (Meir Orbach): Tenable acquires Apex Security for over $105 million “Despite having raised just $8.6 million, Apex is being acquired for more than $105 million ... Apex's Seed round was co-led by Sequoia Capital and Index Ventures, with participation from angel investors, most notably OpenAI CEO Sam Altman.” | press | 2026-06-27 |
| s7 | TechCrunch: Tenable CEO Amit Yoran dies; co-CEO transition “Before becoming Tenable's CEO in 2016, he held a number of roles, including president of RSA, founding CEO of NetWitness, and CEO of In-Q-Tel ... CFO Steve Vintz and COO Mark Thurmond appointed as co-CEOs in his place.” | press | 2026-06-27 |
| s8 | SecurityWeek: Tenable to acquire Vulcan Cyber for $150 million “Tenable has agreed to buy Vulcan for roughly $150 million, $147 million in cash and $3 million in stock. Customers will benefit from extended third-party data flows through integration with over 100 security products.” | press | 2026-06-27 |
| s9 | Tenable homepage, exposure-management framing and sensors “Native signals, exposure intelligence, and third-party data converge inside Tenable One to map the entire attack surface across your infrastructure, cloud, identity, OT, third party applications, and AI.” | official | 2026-06-27 |
| s10 | Tenable Nessus product page, adoption and tenure “Nessus is trusted by tens of thousands of organizations, with over 4 million downloads worldwide.” | official | 2026-07-10 |
| s11 | Tenable Identity Exposure, agentless Active Directory and Entra ID “The identity security solution is completely agentless and does not need privileged credentials, ensuring zero impact on production while delivering instant visibility without increasing your attack surface.” | official | 2026-06-27 |
| s12 | Tenable OT Security, converged OT/IT asset inventory “Build a complete inventory of OT, IoT, and IT assets. Use Safe Active Query to uncover deep device details, including firmware, backplane details, lifecycle data, and known vulnerabilities to eliminate blind spots.” | official | 2026-06-27 |
| s13 | Tenable AI Exposure, AI attack-surface coverage “Detect and stop AI-specific attacks such as prompt injection and jailbreak attempts, and contain risky or compromised AI agents before they cause damage.” | official | 2026-06-27 |
| s14 | Tenable Trust Center (SafeBase), downloadable compliance documents “Use Ask to quickly get answers to your questions without having to sift through the documents within the Trust Center.” | official | 2026-06-27 |
| s15 | Tenable FY2025 results, revenue and cash flow “full year revenue of $999.4 million, up 11% year-over-year; full year net cash provided by operating activities of $266.8 million; full year unlevered free cash flow of $277.0 million.” | press | 2026-06-27 |
| s16 | Wikipedia: Tenable, Inc., founders and listing “Founded September 16, 2002. Founders Ron Gula, Jack Huffard, Renaud Deraison. Traded as Nasdaq: TENB. Headquarters Columbia, Maryland.” | research | 2026-06-27 |
| s17 | Tenable FY2025 results, customers, analyst recognition, federal posture “Added 502 new enterprise platform customers and 5 net new six-figure customers ... Named a Leader in the 2025 Gartner Magic Quadrant for Exposure Assessment Platforms ... Announced agreement with GSA OneGov to further invest in FedRAMP-authorized cloud security capabilities.” | press | 2026-06-27 |
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