CISO Tribune

Vendor comparison · 2 companies

Obsidian Security vs SentinelOne

Obsidian Security sells real-time visibility, continuous governance and runtime enforcement over agents, identities and integrations across third-party apps. SentinelOne sells an AI-native platform with unified protection across endpoint, identity, AI, and cloud. CISO Tribune files both under Identity threat detection and response. 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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  • Obsidian Security
  • SentinelOne
Obsidian Security vs SentinelOne: Products, Customers and Funding Compared
Obsidian SecurityObsidian Security sells real-time visibility, continuous governance and runtime enforcement over agents, identities and integrations across third-party apps.obsidiansecurity.comSentinelOneSentinelOne sells an AI-native platform with unified protection across endpoint, identity, AI, and cloud.sentinelone.com
What it sells
  • Continuous GovernanceChecks each requirement, written once, in each connected app that exposes the data it needs.
  • Purple AI[3][4][5]AI that handles triage, correlation, and routine response alongside agentic workflows.
  • Wayfinder IRR[5]On-demand breach readiness, compromise assessments, and incident response.
  • Wayfinder Emergency Response[5]On-demand access to incident response with no commitment required.
Categories
Headquarters
Not stated on its pagesMountain View, CA, USA[2]
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Privately held[1]Not stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • August 4, 2026Obsidian Security said it raised $85 million in a Series D funding round that valued the company at $1.1 billion.[15]
  • October 29, 2026SentinelOne announced the upcoming addition of Anthropic's Claude Mythos 5.1 to its Wayfinder Frontier AI Services offering.[7]
  • March 3, 2026SentinelOne announced the appointment of Sonalee Parekh as Chief Financial Officer, effective March 24, 2026.[8]
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[9]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, Obsidian Security sells to security teams that must defend actions by identities they can barely enumerate, across apps they did not build, on infrastructure they do not control. Obsidian Security describes security teams at large financial services and technology companies adopting its product to detect account takeovers, SaaS threats and privilege misuse. Obsidian Security addresses enterprises whose data lives in third-party enterprise apps they do not own. Obsidian Security addresses organisations whose employees connect AI agents to business apps through MCP. Obsidian Security addresses organisations where each team picks its own AI agent tool.From its own pages, SentinelOne sells to organizations ranging from global enterprises to fast-moving teams. SentinelOne offers solutions tailored to the regulatory, operational, and threat realities of specific sectors. For analysts, Purple AI and agentic workflows handle triage, correlation, and routine response. Organizations that need expert incident response right now, without a prior commitment, can use an on-demand DFIR block.
Last verified
November 4, 2026November 5, 2026

Where they overlap

  • Obsidian Security and SentinelOne are both filed under Identity threat detection and response.

Where they differ, field by field

  • Obsidian Security's primary category is SaaS security posture; SentinelOne's is EDR and XDR.
  • Obsidian Security is also filed under AI model and agent security and Workforce AI usage security. SentinelOne is also filed under Cloud-native application protection (CNAPP) and MDR and managed SOC.
  • Obsidian Security lists Continuous Governance. SentinelOne lists Purple AI, Wayfinder IRR and Wayfinder Emergency Response.
  • SentinelOne is headquartered in Mountain View, CA, USA.
  • Obsidian Security is privately held.

What it sells: Obsidian Security

What Continuous Governance does
The control model includes mappings to NIST, CIS, ISO 27001, and GDPR. Supported controls are checked continuously, and changes are shown. Fixes are routed through Jira, ServiceNow, and other supported tools.

What it sells: SentinelOne

What Purple AI does[3][4][5]
Purple AI and agentic workflows handle triage, correlation, and routine response. Purple AI investigates what analysts cannot reach in time. Purple AI accelerates investigations, analysis, and forensic workflows in SentinelOne engagements.
What Wayfinder IRR does[5]
Wayfinder IRR provides on-demand breach readiness, expert-led compromise assessments, and incident response. DFIR specialists contain, investigate, and eradicate confirmed or suspected breaches. SentinelOne offers five assessment types: General, M&A, Post-Breach, Insider Threat, and Targeted. One retainer secures a renewable pool of expert hours used across readiness, assessments, and response.
What Wayfinder Emergency Response does[5]
Wayfinder Emergency Response delivers on-demand access with no commitment required. SentinelOne offers an immediate 40-hour on-demand DFIR block that requires no retainer.

Questions about Obsidian Security and SentinelOne

What do Obsidian Security and SentinelOne sell?
Obsidian Security sells Continuous Governance. SentinelOne sells Purple AI, Wayfinder IRR and Wayfinder Emergency Response.
Are Obsidian Security and SentinelOne in the same category?
They share Identity threat detection and response. Obsidian Security's primary category is SaaS security posture and SentinelOne's is EDR and XDR.
Where are Obsidian Security and SentinelOne headquartered?
SentinelOne is headquartered in Mountain View, CA, USA.
Who owns Obsidian Security and SentinelOne?
Obsidian Security is privately held.
Who are Obsidian Security and SentinelOne sold to?
From its own pages, Obsidian Security sells to security teams that must defend actions by identities they can barely enumerate, across apps they did not build, on infrastructure they do not control. From its own pages, SentinelOne sells to organizations ranging from global enterprises to fast-moving teams.
What have Obsidian Security and SentinelOne announced recently?
August 4, 2026: Obsidian Security said it raised $85 million in a Series D funding round that valued the company at $1.1 billion. October 29, 2026: SentinelOne announced the upcoming addition of Anthropic's Claude Mythos 5.1 to its Wayfinder Frontier AI Services offering.

About Obsidian Security

Obsidian Security sells real-time visibility, continuous governance and runtime enforcement over agents, identities and integrations across third-party apps. Obsidian Security provides guardrails and real-time controls for AI agents that need access to third-party apps. The Obsidian platform turns billions of signals across business critical applications into security intelligence to protect users, agents, and data. Obsidian Security collects and connects third-party app and AI configurations, user activity, real-world threat signals, and browser telemetry.[3][4][13]

Obsidian Security says enterprise data lives in Salesforce, Workday, ServiceNow and 35K+ third-party enterprise apps that customers do not own. Obsidian Security says non-human identities now outnumber people inside the enterprise application estate. Obsidian Security says every AI application and agent connected to an enterprise inherits the permissions and trust misconfigurations that already existed in enterprise applications. Obsidian Security says vibe-coded workflows connect straight into Salesforce, Snowflake, Workday, and Slack, often before anyone has reviewed them. Obsidian Security spent years mapping every identity, permission, and data flow across third-party enterprise applications. Obsidian Security gives customers visibility into what is connected, controls to enforce what is allowed, and clarity on what needs to change.[3][5]

Obsidian Security has over 200 integrations into SaaS and AI applications that pull posture and activity data. The Obsidian browser extension captures real-time user and AI agent activity. Obsidian Security normalizes every human and non-human identity, entitlement, access, and action and connects them in a knowledge graph. The Obsidian Knowledge Graph maps the relationships between identities, permissions, and actions. Obsidian Security layers configuration, policy, and ownership data together to surface misconfigurations and privilege overlaps. Obsidian Security builds machine learning baselines from real enterprise behavior, refined by what it learns from actual incidents. Obsidian Security normalizes and correlates 29+ billion events from third-party applications every month and feeds them back into the platform. Obsidian Security builds detections from how attackers acted across 500+ real breach responses with DFIR firms. When one customer identifies and removes a risky integration or access pattern, Obsidian Security shares that signal automatically across every environment it protects. Obsidian Security provides out-of-the-box detection rules mapped to the MITRE ATT&CK framework and machine learning models based on real incident data. Obsidian Security integrates with SIEM and SOAR platforms for automated workflows. Obsidian Security provides an AI extension of the security team that explains rules, triages threats, and manages exceptions.[4][6][7][8][13]

Obsidian Security centralizes AI agent policy and enforces it at runtime across coding agents, agent platforms, MCP connections, and existing gateways. Obsidian Security agent policies use who the agent acts for, that person's employment status, and the team's data labels to tell a routine action from a risky one. Obsidian Security agent policies hold or block only the agent actions that match their conditions, and tool calls that match no policy proceed. Obsidian Security lets teams test each policy against real agent traffic before it stops anything. Obsidian Security says employees can connect AI agents to apps such as Salesforce, Snowflake, Slack, and Google Drive through MCP. The Obsidian proxy evaluates MCP traffic at each step of a session, including the app the agent can reach, the records it can list, and each tool call. The Obsidian proxy maps each MCP session to the person who started it, their account in the app, and the workspace, org, or instance the session reaches. With the Obsidian proxy, agents receive a proxy-issued token, and each user authorizes the app through the vendor's own consent flow.[5][9][10]

Obsidian Security monitors every new and existing MCP server in an environment with one dashboard. Obsidian Security shows MCP servers across AI agent platforms such as n8n and Microsoft Copilot. Obsidian Security raises risk alerts when agents connect to MCP servers without authentication. Obsidian Security helps teams spot unvetted or suspicious MCP servers and remove them.[11]

Obsidian Security maps supported identity, permission, configuration, and activity data to one control model. Obsidian Security provides mappings to NIST, CIS, ISO 27001, and GDPR. Obsidian Security continuously checks supported controls and shows what changed. Obsidian Security attaches the available identity, permission, and ownership context to each finding so teams can find the cause and route the fix. Obsidian Security routes fixes through Jira, ServiceNow, and other supported tools. Obsidian Security fixes misconfigurations, removes high-risk integrations, and stops malicious activity in third-party apps. Obsidian Security detects and removes risky or unauthorized AI agent actions in third-party apps. Obsidian Security pairs inline defenses against credential and session theft with alerts for investigation and response. Obsidian Security monitors configuration drift and spots violations to automate compliance reporting. Obsidian Security discovers app sprawl, including unsanctioned AI and shadow SaaS. Obsidian Security offers coverage for organisations of up to 1K users.[12][13][14]

Obsidian Security committed to securing identity and SaaS apps, which it describes as a new attack surface that nobody was watching. Security teams at large financial services and technology companies adopted Obsidian Security to detect account takeovers, SaaS threats and privilege misuse. Obsidian Security is backed by IVP, Norwest, and GV. Obsidian Security announced an $85M Series D led by Crescent Cove Advisors.[2][5][7][11][12][13]

Obsidian Security on the record

Sources

Obsidian Security full record

  1. [1]obsidiansecurity.comObsidian Security · obsidiansecurity.com · undated page, accessed November 4, 2026 · Tier A
  2. [2]Unlocking ai potential securelyObsidian Security · obsidiansecurity.com · undated page, accessed November 4, 2026 · Tier A
  3. [3]Secure AI. Fearless Innovation. | ObsidianObsidian Security · undated page, accessed November 10, 2026 · Tier A
  4. [4]The Obsidian Security PlatformObsidian Security · undated page, accessed November 10, 2026 · Tier A
  5. [5]Obsidian Security – Who We AreObsidian Security · undated page, accessed November 10, 2026 · Tier A
  6. [6]The Data Behind Better SecurityObsidian Security · undated page, accessed November 10, 2026 · Tier A
  7. [7]Network EffectsObsidian Security · undated page, accessed November 10, 2026 · Tier A
  8. [8]Automate Third-Party Application ComplianceObsidian Security · undated page, accessed November 10, 2026 · Tier A
  9. [9]Runtime Policy Decision Engine for AI Agents | Obsidian SecurityObsidian Security · undated page, accessed November 10, 2026 · Tier A
  10. [10]MCP Security Proxy for AI Agents | Obsidian SecurityObsidian Security · undated page, accessed November 10, 2026 · Tier A
  11. [11]MCP Security: Audit and Control Every MCP ServerObsidian Security · undated page, accessed November 10, 2026 · Tier A
  12. [12]Continuous Third-Party App Governance | Obsidian SecurityObsidian Security · undated page, accessed November 10, 2026 · Tier A
  13. [13]Third-Party Application Security | Obsidian SecurityObsidian Security · undated page, accessed November 10, 2026 · Tier A
  14. [14]Flexible SaaS Security Pricing | ObsidianObsidian Security · undated page, accessed November 10, 2026 · Tier A
  15. [15]Obsidian Security raises funding at $1.1 billion valuation on AI security demand | ReutersReuters · published August 4, 2026 · Tier B

SentinelOne full record

  1. [1]sentinelone.comSentinelOne · sentinelone.com · undated page, accessed November 5, 2026 · Tier A
  2. [2]CompanySentinelOne · sentinelone.com · undated page, accessed November 5, 2026 · Tier A
  3. [3]SentinelOne | AI-Powered Enterprise Cybersecurity PlatformSentinelOne · undated page, accessed November 10, 2026 · Tier A
  4. [4]Singularity™ Endpoint Security Platform | SentinelOneSentinelOne · undated page, accessed November 10, 2026 · Tier A
  5. [5]Wayfinder Incident Readiness & Response Services | SentinelOneSentinelOne · undated page, accessed November 10, 2026 · Tier A
  6. [6]LABScon24 Replay | Let Them Eat Cake: “Secure by Upgrade” Software is a National Security Threat | SentinelOneSentinelOne · published December 18, 2024 · Tier A
  7. [7]SentinelOne to Add Anthropic's Claude Mythos 5.1 to Wayfinder Frontier AI ServicesSentinelOne · published October 29, 2026 · Tier A
  8. [8]SentinelOne Appoints Sonalee Parekh as Chief Financial OfficerSentinelOne · published March 3, 2026 · Tier A
  9. [9]SentinelOne Singularity Cloud Security Reviews 2026G2 · undated page, accessed November 10, 2026 · Tier C

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