CISO Tribune

Vendor comparison · 2 companies

Prompt Security vs Straiker

Prompt Security offers protection for both employee use of AI tools and the apps an organization builds. Straiker lets security teams discover agents, MCP servers, and Skills, test how they can fail, and stop malicious behavior at runtime. CISO Tribune files both under AI firewalls and guardrails and 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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  • Prompt Security
  • Straiker
Prompt Security vs Straiker: Products, Customers and Funding Compared
Prompt SecurityPrompt Security offers protection for both employee use of AI tools and the apps an organization builds.prompt.securityStraikerStraiker lets security teams discover agents, MCP servers, and Skills, test how they can fail, and stop malicious behavior at runtime.straiker.ai
What it sells
  • Prompt Fuzzer[4]An open source tool for AI vulnerability assessment.
  • Discover AI[2][3][4][5][12]Maps every AI agent, MCP server, and agentic workflow in an environment.
  • Ascend AI[2][3][7][12]Ascend AI is Straiker's adversarial testing engine for AI agents.
  • Defend AI[2][3][8][9][12]Defend AI delivers runtime security for AI agents.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
2023[1]Not stated on its pages
Ownership and funding
Owned by SentinelOne since 2025[3][7][8][10]Not stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
Recent news
Not stated on its pages
  • August 11, 2026Straiker was named an OpenAI Select Partner within the OpenAI Partner Network.[16]
  • August 4, 2026Straiker launched the Agentic Kill Switch, a control that lets security teams take a misbehaving or compromised AI agent offline.[15]
  • June 29, 2026Straiker announced a $64 million Series A, bringing its total funding to $85 million.[14]
  • June 29, 2026Straiker announced a $64 million Series A, bringing its total funding to $85 million.[13]
G2 and Gartner Peer Insights
  • G2: listed, seen November 10, 2026[10]
  • Gartner Peer Insights: Not stated on its pages
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
Who it fits
Not written yetNot written yet
Last verified
September 27, 2026November 5, 2026

Where they overlap

  • Prompt Security and Straiker are both filed under AI firewalls and guardrails and AI model and agent security.

Where they differ, field by field

  • Prompt Security's primary category is AI firewalls and guardrails; Straiker's is AI model and agent security.
  • Prompt Security is also filed under Workforce AI usage security. Straiker is also filed under AI governance.
  • Prompt Security lists Prompt Fuzzer. Straiker lists Discover AI, Ascend AI and Defend AI.
  • Prompt Security was founded in 2023.
  • Prompt Security is owned by SentinelOne, since 2025.

What it sells: Prompt Security

What Prompt Fuzzer does[4]
Prompt Fuzzer is listed under AI Security Tools on the Prompt Security site. The site describes it as an open source tool for AI vulnerability assessment.

What it sells: Straiker

What Discover AI does[2][3][4][5][12]
Discover AI delivers continuous posture monitoring, misconfiguration detection, and governance. Discover AI evaluates agent configurations, permissions, and blast radius to surface misconfigurations and risky integrations before they become incidents. Discover AI covers builder platforms like Bedrock Agentcore, Azure Foundry, and MS Copilot Studio.
What Ascend AI does[2][3][7][12]
Ascend AI tests for prompt injection, goal hijacking, tool misuse, and inter-agent manipulation. Ascend AI integrates into CI/CD pipelines, staging environments, and production deployments to run continuous adversarial testing. A successful Ascend AI attack can become a Defend AI policy.
What Defend AI does[2][3][8][9][12]
Defend AI detects and blocks identity abuse, memory poisoning, data exfiltration, and resource exploitation at runtime. Defend AI secures coding agents such as Cursor, GitHub Copilot, and Claude Code with runtime protection against destructive actions, data exfiltration, and malicious MCP server and Skill connections. Defend AI detects data exfiltration across SaaS applications, blocks prompt injection delivered through enterprise content like emails and documents, and surfaces unapproved agent usage.

Questions about Prompt Security and Straiker

What do Prompt Security and Straiker sell?
Prompt Security sells Prompt Fuzzer. Straiker sells Discover AI, Ascend AI and Defend AI.
Are Prompt Security and Straiker in the same category?
They share AI firewalls and guardrails and AI model and agent security. Prompt Security's primary category is AI firewalls and guardrails and Straiker's is AI model and agent security.
When were Prompt Security and Straiker founded?
Prompt Security was founded in 2023.
Who owns Prompt Security and Straiker?
Prompt Security is owned by SentinelOne, since 2025.
What have Prompt Security and Straiker announced recently?
August 11, 2026: Straiker was named an OpenAI Select Partner within the OpenAI Partner Network.

About Prompt Security

Prompt Security offers protection for both employee use of AI tools and the apps an organization builds. Prompt Security continuously tracks prompts per day in organizations of 500 to 1,000 employees.[4][5]

Prompt Security holds that securing agentic AI is fundamentally different from securing traditional software. Prompt Security states that agents act autonomously, call tools and reason over untrusted input, so prompt injection, identity and runtime behavior have to be governed in real time and not only at the perimeter.

Prompt Security provides a security skill suite for OpenClaw, NanoClaw and Hermes agents.[6]

Prompt Security provides a tool that tracks and analyzes OpenClaw deployments across an organization. Prompt Security provides a tool that tests and hardens a system prompt against dynamic LLM-based attacks.[4][9]

Prompt Security publishes news, research, tools and analysis for security teams responding to AI threats. Prompt Security describes an AI gateway as a centralized layer between an organization's users or applications and the AI models or services they call. An AI gateway, as Prompt Security describes it, lets security teams monitor, control and secure that traffic from one place instead of instrumenting every application separately.[4]

Prompt Security curates an interactive, continuously updated directory of 471 companies building security for agentic AI, organized across 14 functional categories. Both pure-play startups and dedicated AI-security lines from larger vendors are in scope for the Prompt Security directory. Entries in the Prompt Security directory are compiled from vendor websites, product documentation, funding announcements, public company registries and analyst coverage. Placement in the Prompt Security directory reflects publicly stated capabilities, not vendor marketing tiers. Category definitions and threat coverage in the Prompt Security directory are mapped against established, independent frameworks for AI and LLM security. The full dataset behind the Prompt Security directory is open and machine-readable.[2][4][5][6][9]

Prompt Security on the record

Sources

Prompt Security full record

  1. [1]Prompt security partners with f5 to secure genai applications with a firewall for ai 302131373Prompt Security via PR Newswire · prnewswire.com · published April 30, 2024 · Tier A
  2. [2]Securing ai promptSentinelOne · sentinelone.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Sentinelone completes acquisition of prompt securitySentinelOne via The Globe and Mail · theglobeandmail.com · published September 5, 2025 · Tier A
  4. [4]Prompt Security | From SentinelOnePrompt Security · undated page, accessed October 27, 2026 · Tier A
  5. [5]AI Security | AI Glossary | Prompt SecurityPrompt Security · undated page, accessed October 27, 2026 · Tier A
  6. [6]ClawSec: A Security Skill Suite for OpenClaw AgentsPrompt Security · undated page, accessed October 27, 2026 · Tier A
  7. [7]AI Security Startups Map — Agentic AI Vendors by CategoryPrompt Security · undated page, accessed October 27, 2026 · Tier A
  8. [8]About this Map & Methodology — AI Security Startups MapPrompt Security · undated page, accessed October 27, 2026 · Tier A
  9. [9]OneClaw DashboardPrompt Security · undated page, accessed November 10, 2026 · Tier A
  10. [10]Prompt Security Pros and Cons | User Likes & DislikesG2 · undated page, accessed November 10, 2026 · Tier C

Straiker full record

  1. [1]AboutStraiker · straiker.ai · undated page, accessed November 5, 2026 · Tier A
  2. [2]Straiker | The Agentic AI Security CompanyStraiker · undated page, accessed November 10, 2026 · Tier A
  3. [3]AI Agent Security Platform | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  4. [4]Discover AI: AI Agent Inventory, AI-SPM & Agent-SPM | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  5. [5]Security for Coding Copilots and Agents | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  6. [6]AI Agent Security Testing and Red Teaming | Straiker Ascend AIStraiker · undated page, accessed November 10, 2026 · Tier A
  7. [7]AI Red Teaming for Agentic Applications and AI Agents | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  8. [8]AI Agent Runtime Security and Protection | Straiker Defend AIStraiker · undated page, accessed November 10, 2026 · Tier A
  9. [9]Runtime AI Guardrails for Agentic Applications | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  10. [10]MCP & Agent Skills Security | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  11. [11]GenAI and Agentic AI Threat Detection | StraikerStraiker · undated page, accessed November 10, 2026 · Tier A
  12. [12]AI Agent Compliance & Governance | Visibility, Audit Trails & Runtime ControlsStraiker · undated page, accessed November 10, 2026 · Tier A
  13. [13]Straiker Raises $64M Series A to Secure the Agentic WorkforcePR Newswire · published June 29, 2026 · Tier A
  14. [14]Straiker Raises $64M Series A for AI Agent SecurityStraiker · published June 29, 2026 · Tier A
  15. [15]Straiker Launches First AI Agent Kill Switch for EnterprisesStraiker · published August 4, 2026 · Tier A
  16. [16]Straiker Named OpenAI Select Partner | AI Agent SecurityStraiker · published August 11, 2026 · Tier A

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