What do Assail and Prime Security sell?

Assail sells Ares, Reaper and Assail Anywhere. Prime Security sells Autonomous Design Reviews.

Are Assail and Prime Security in the same category?

They share Breach simulation and automated pen-testing. Assail's primary category is Breach simulation and automated pen-testing and Prime Security's is Application security posture management.

Who are Assail and Prime Security sold to?

From its own pages, Assail sells mainly to security teams in manufacturing, financial services, federal and state government, automotive, retail, and defense.

What have Assail and Prime Security announced recently?

November 4, 2026: Assail, Inc. announced Cassandra, a proactive AI agent integrated into its Ares platform, along with expanded threat modeling capabilities tied to autonomous security testing. December 9, 2025: Prime Security said it raised $20 million in early-stage funding to fuel go-to-market expansion and its Agentic Product Security Platform.

Vendor comparison · 2 companies

Assail vs Prime Security

Assail sells Ares, an autonomous offensive security platform that tests applications, APIs, mobile apps and AI systems and shows what an attacker could actually reach. Prime Security sells an AI security review platform designed for software development lifecycles. CISO Tribune files both under Breach simulation and automated pen-testing. 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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Assail vs Prime Security: Products, Customers and Funding Compared
What it sells
	AssailAssail sells Ares, an autonomous offensive security platform that tests applications, APIs, mobile apps and AI systems and shows what an attacker could actually reach.assailai.com	Prime SecurityPrime Security sells an AI security review platform designed for software development lifecycles.primesec.ai
What it sells	Ares^{[1][3][4][5][6][7][9][10][11][12]}Continuous autonomous red teaming across web applications, APIs, and mobile apps. Reaper^[3]Autonomous offensive cyber operations built for military, federal, and intelligence missions. Assail Anywhere^[3]Deployment option for the entire platform, including the AI model.	Autonomous Design Reviews^[1][4]AI agents review specs, architecture and data flows to uncover security risks before code is written.
Categories
Categories	Breach simulation and automated pen-testing (primary category) API security Mobile security	Application security posture management (primary category) Static application security testing Software supply chain security Breach simulation and automated pen-testing
Headquarters
Headquarters	Not stated on its pages	Not stated on its pages
Founded
Founded	Not stated on its pages	Not stated on its pages
Ownership and funding
Ownership and funding	Privately held	Not stated on its pages
Named customers
Named customers	Not stated on its pages	Not stated on its pages
Recent news
Recent news	November 4, 2026Assail, Inc. announced Cassandra, a proactive AI agent integrated into its Ares platform, along with expanded threat modeling capabilities tied to autonomous security testing.^[11] July 7, 2026Assail Inc. launched Sidewinder, a rebuilt second-generation version of its Ares offensive security platform running on a new 31 billion-parameter model.^[12]	December 9, 2025Prime Security said it raised $20 million in early-stage funding to fuel go-to-market expansion and its Agentic Product Security Platform.^[11]
G2 and Gartner Peer Insights
G2 and Gartner Peer Insights	G2: Not stated on its pages 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
Who it fits	From its own pages, Assail sells mainly to security teams in manufacturing, financial services, federal and state government, automotive, retail, and defense. Its industry pages address manufacturers, banks and fintech firms, government agencies, vehicle makers, retailers, and defense programs. Assail also says it supports on-premises, air-gapped, own-cloud, and SaaS deployment for organizations that need to keep data under their control.	Not written yet
Last verified
Last verified	October 21, 2026	November 9, 2026

Where they overlap

Assail and Prime Security are both filed under Breach simulation and automated pen-testing.

Where they differ, field by field

Assail's primary category is Breach simulation and automated pen-testing; Prime Security's is Application security posture management.
Assail is also filed under API security and Mobile security. Prime Security is also filed under Static application security testing and Software supply chain security.
Assail lists Ares, Reaper and Assail Anywhere. Prime Security lists Autonomous Design Reviews.
Assail is privately held.

What it sells: Assail

What Ares does^{[1][3][4][5][6][7][9][10][11][12]}: Ares uses coordinated AI agents to discover weaknesses and validate what an attacker could actually reach. It tests authenticated applications through the existing identity provider and tracks changes across known and shadow APIs. Ares delivers the evidence behind each confirmed risk.
What Reaper does^[3]: Assail describes Reaper as built for military, federal, and intelligence missions. Assail has expanded Reaper's sovereign deployment architecture to AWS GovCloud and Google Cloud Assured Workloads.

What it sells: Prime Security

What Autonomous Design Reviews does^[1][4]: Prime checks every design, scores every risk and validates every fix in code. Prime can produce a threat model and combines design-level analysis with actual code.

Questions about Assail and Prime Security

What do Assail and Prime Security sell?: Assail sells Ares, Reaper and Assail Anywhere. Prime Security sells Autonomous Design Reviews.
Are Assail and Prime Security in the same category?: They share Breach simulation and automated pen-testing. Assail's primary category is Breach simulation and automated pen-testing and Prime Security's is Application security posture management.
Who owns Assail and Prime Security?: Assail is privately held.
Who are Assail and Prime Security sold to?: From its own pages, Assail sells mainly to security teams in manufacturing, financial services, federal and state government, automotive, retail, and defense.
What have Assail and Prime Security announced recently?: November 4, 2026: Assail, Inc. announced Cassandra, a proactive AI agent integrated into its Ares platform, along with expanded threat modeling capabilities tied to autonomous security testing. December 9, 2025: Prime Security said it raised $20 million in early-stage funding to fuel go-to-market expansion and its Agentic Product Security Platform.

About Assail

Assail sells Ares, an autonomous offensive security platform that tests applications, APIs, mobile apps and AI systems and shows what an attacker could actually reach.^[1]

Assail says Ares continuously tests applications, APIs, mobile apps, and AI systems as they change. Ares follows attack paths, exploits weaknesses, and proves what an attacker could actually reach. Coordinated AI agents extend testing capacity, and Ares tests authenticated applications through the customer's existing identity provider. Ares also tracks changes across known and shadow APIs and delivers the evidence behind each confirmed risk.^[3]

Assail describes Ares as combining autonomous red teaming, attack surface management, and Shadow AI discovery across web, API, mobile, and supported AI environments, with applicable MITRE ATLAS coverage. The Ares platform is powered by Assail's domain-adapted model for security reasoning and tool use.^[3][7]

On deployment, Assail says Ares can run within the customer's own infrastructure, even in disconnected environments. With Assail Anywhere, the entire platform, including the AI model, deploys on-premises, inside isolated and air-gapped networks, in the customer's own cloud, or through Assail's SaaS. Assail has also announced that it expanded Reaper's sovereign deployment architecture to AWS GovCloud and Google Cloud Assured Workloads.^[3]

Assail names Ares, Reaper, and Scorpion as the products taken to the fight. Reaper is described as autonomous offensive cyber operations built for military, federal, and intelligence missions.^[3]

Assail publishes industry pages for manufacturing, financial services, federal and state government, automotive, retail, and defense. In manufacturing, Ares validates systems such as ERP, MES, PLM, supplier portals, industrial APIs, and connected products. In financial services, Ares validates APIs, payment rails, mobile banking apps, and open banking integrations. For retail, Ares validates e-commerce web apps, mobile shopping apps, loyalty APIs, and gift card platforms. In automotive it covers telematics APIs, OTA infrastructure, and mobile companion apps.^{[4][5][6][9][10]}

Assail says its team brings 26 years of offensive security experience. Assail also publishes original research on attack techniques and the exploitation of AI and API surfaces. A customer, Branch, says Ares helps its security team increase penetration testing frequency and validate remediations faster.^{[1][2][3][4][5][6][8]}

Assail on the record

About Prime Security

Prime Security sells an AI security review platform designed for software development lifecycles. Prime Agents learn an organisation's architecture, code and risk history. Prime Security describes one platform covering the SDLC before the code, in the code and after the code. Prime agents work autonomously inside the customer environment, mapping every application, policy, resource and data flow. Prime agents live inside the development lifecycle and understand designs, code, cloud and policies.^[1][2][3][4]

Prime Security says AI agents, multiple stacks and complex development processes have created an attack surface that no existing security tool was built to handle. Prime Security states its aim as connecting architecture, code and cloud to find every exploitable attack vector before attackers do. Prime tracks every asset as it moves from design to deployment. Prime learns an organisation's architecture, past decisions and risk profile, and each review builds on the last one.^[3][4][5]

Autonomous design reviews use AI agents to review specs, architecture and data flows to uncover security risks before code is written. Prime checks every design, scores every risk and validates every fix in code. Prime can produce a threat model, and Prime combines design-level analysis with actual code. Prime Security covers architecture reviews, threat modeling, documentation analysis, and security analysis tied to tickets and code changes. Prime finds vulnerabilities and logic flaws in AI-generated and human-written code. Prime checks every PR the moment it opens, whether a developer or an agent wrote it. Prime checks each pull request for approved auth flows, encryption methods, architecture patterns and framework requirements. Prime reviews every PR against the policies that apply to that repo, validates each finding and hands the agent the context to fix it. Prime logs every review, finding, validation and fix.^{[1][2][3][4][6]}

Prime sets security guardrails for agents like Cursor and Claude Code, catching insecure code at the PR before it merges. Prime Security embeds security policies directly into AI coding workflows. Prime inventories every package in the dependency graph, direct and transitive, and matches it against known CVEs and the license policy. Prime identifies vulnerable packages accessible to attackers with proven attack paths. Exploitable findings arrive with the full attack path, and unreachable ones arrive marked as noise, with the reasoning attached. Prime checks every dependency against the license policy in the same scan. Prime runs continuous attack path analysis with source, architecture and controls. Prime maps how services talk, where data flows and how an attacker would chain it all together. Prime evaluates multi-step attacks the way an attacker plans them.^[1][3][4][7]

Prime delivers a tailored fix wherever the work happens, with the PR, Slack or a Jira ticket for developers. For dev agents, Prime delivers context over MCP, so mitigation runs with no human in the loop. Prime proposes mitigations built for the codebase, delivers them to developers and agents and validates the fix landed in code. Agents run continuously across planning and development workflows without requiring custom engineering from the customer team. Prime integrates with Github, Gitlab, Claude Code, Cursor, Jira, Confluence, Google Drive, Azure DevOps, Linear, and Git Issues.^[2][3][4]

Prime Security supports Product Security Engineers and Security Architects. MX adopted Prime Security. MX is a financial data platform that powers secure data access, analytics, and personalized money experiences for banks, fintechs, and financial institutions. Oscar Health adopted Agentic Security Architect from Prime to automate security reviews and proactively identify risk across all engineering work. Oscar Health is a healthcare technology company that combines digital experiences with health insurance services. ThoughtSpot adopted Agentic Security Architect from Prime to scale security reviews and threat modeling across its expanding engineering surface area. ThoughtSpot is an analytics platform that enables organizations to explore, analyze, and act on data at scale.^{[1][4][8][9][10]}

Prime Security on the record

Sources

Assail full record

[1]assailai.comAssail · assailai.com · undated page, accessed October 21, 2026 · Tier A
[2]Press releasesAssail · assailai.com · undated page, accessed October 21, 2026 · Tier A
[3]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[4]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[5]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[6]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[7]Automotive | AssailAssail · undated page, accessed November 4, 2026 · Tier A
[8]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[9]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[10]Assail | Autonomous Offensive AI for the modern application stackAssail · undated page, accessed November 4, 2026 · Tier A
[11]Assail Introduces Cassandra, a Proactive AI Agent Connecting Threat Modeling with Autonomous Security TestingPR Newswire · published November 4, 2026 · Tier A
[12]Assail launches Sidewinder, an offensive security AI that fixes its own mistakesSiliconANGLE · published July 7, 2026 · Tier B

Prime Security full record

[1]primesec.aiPrimeSec Inc. · primesec.ai · undated page, accessed November 9, 2026 · Tier A
[2]Build vs Buy: Automating Security Design Reviews at Scale | Prime SecurityPrime Security · undated page, accessed November 10, 2026 · Tier A
[3]Prime Security | Agentic Product Security PlatformPrime Security · undated page, accessed November 10, 2026 · Tier A
[4]Prime Security Platform | AI Agents for Product SecurityPrime Security · undated page, accessed November 10, 2026 · Tier A
[5]About Prime Security | Agentic AI Security CompanyPrime Security · undated page, accessed November 10, 2026 · Tier A
[6]AI Security Code Reviews | Prime SecurityPrime Security · undated page, accessed November 10, 2026 · Tier A
[7]Supply Chain Security | Prime SecurityPrime Security · undated page, accessed November 10, 2026 · Tier A
[8]How MX Used Prime to Scale Product Security Without Adding HeadcountPrime Security · undated page, accessed November 10, 2026 · Tier A
[9]How Oscar Health Scaled Secure Development and Risk Prioritization Across EngineeringPrime Security · undated page, accessed November 10, 2026 · Tier A
[10]How ThoughtSpot Scaled Security Coverage and Confidence in a High-Velocity Engineering EnvironmentPrime Security · undated page, accessed November 10, 2026 · Tier A
[11]Prime Security raises $20M early-stage funding to scale its agentic product security platform - SiliconANGLESiliconANGLE · published December 9, 2025 · Tier B

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