CISO Tribune

Vendor comparison · 2 companies

Assail vs Data Theorem

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. Data Theorem sells application security products that secure code, mobile apps, APIs and cloud. CISO Tribune files both under API security and Mobile 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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  • Assail
  • Data Theorem
Assail vs Data Theorem: Products, Customers and Funding Compared
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.comData TheoremData Theorem sells application security products that secure code, mobile apps, APIs and cloud.datatheorem.com
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.
  • Mobile Secure[2][6][8]Automated security and privacy testing for every iOS and Android release.
  • Mobile Protect[2][3][7][13]Mobile Protect defends the app on the device.
  • Code SAST Secure[3][5][8][14][16]SAST, SCA and SBOM across every repo, in more than 20 languages.
  • API Secure[2][5][8][13][15]API Secure discovers every REST, GraphQL, gRPC, SOAP and serverless API.
  • Cloud Secure[2][5][8][16]Cloud Secure extends API Secure into the cloud your APIs and apps run on.
Categories
Headquarters
Not stated on its pagesPalo Alto, United States[1]
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Privately heldNot stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
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]
  • June 30, 2026Data Theorem launched three AI security capabilities that together form a closed-loop platform covering exploit discovery, remediation, and runtime defense.[17]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 3, 2026[10]
  • Gartner Peer Insights: Not stated on its pages
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.From its own pages, the company sells to teams that need to find every app, API and cloud resource, including the ones nobody told security about. It addresses teams that want to catch issues in code and the pipeline and hand auditors reports built from real scans. Game publishers are addressed with Mobile Protect for Gaming, which stops cheats, tampering and clones in the game.
Last verified
October 21, 2026September 27, 2026

Where they overlap

  • Assail and Data Theorem are both filed under API security and Mobile security.

Where they differ, field by field

  • Assail's primary category is Breach simulation and automated pen-testing; Data Theorem's is API security.
  • Data Theorem is also filed under Static application security testing and Cloud-native application protection (CNAPP).
  • Assail lists Ares, Reaper and Assail Anywhere. Data Theorem lists Mobile Secure, Mobile Protect, Code SAST Secure, API Secure and Cloud Secure.
  • Data Theorem is headquartered in Palo Alto, United States.
  • 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: Data Theorem

What Mobile Secure does[2][6][8]
Mobile Secure provides automated security and privacy testing for every iOS and Android release. Mobile Secure signs in to your apps and tests every screen of every release.
What Mobile Protect does[2][3][7][13]
Mobile Protect blocks hooking frameworks, debuggers and re-signed copies inside the app. Mobile Protect scores every session and flags likely fraud to your team. Mobile Protect includes SSL pinning built on TrustKit.
What Code SAST Secure does[3][5][8][14][16]
Code SAST Secure scans your code and dependencies. Code SAST Secure secures your code, open source libraries and vendor SBOMs in one place. Code SAST Secure catches infrastructure as code misconfigurations in the repository, before they ship.
What API Secure does[2][5][8][13][15]
API Secure scores every operation on its own across authentication. API Secure probes your APIs from outside, then signs in as two different users. API Secure spots the abuse and tells the WAF you already run what to block.
What Cloud Secure does[2][5][8][16]
Cloud Secure covers the resources, roles and data behind the APIs. Cloud Secure runs the same IaC checks on what is deployed, and secures the containers and registry images your APIs and apps run on.

Questions about Assail and Data Theorem

What do Assail and Data Theorem sell?
Assail sells Ares, Reaper and Assail Anywhere. Data Theorem sells Mobile Secure, Mobile Protect, Code SAST Secure, API Secure and Cloud Secure.
Are Assail and Data Theorem in the same category?
They share API security and Mobile security. Assail's primary category is Breach simulation and automated pen-testing and Data Theorem's is API security.
Where are Assail and Data Theorem headquartered?
Data Theorem is headquartered in Palo Alto, United States.
Who owns Assail and Data Theorem?
Assail is privately held.
Who are Assail and Data Theorem sold to?
From its own pages, Assail sells mainly to security teams in manufacturing, financial services, federal and state government, automotive, retail, and defense. From its own pages, the company sells to teams that need to find every app, API and cloud resource, including the ones nobody told security about.
What have Assail and Data Theorem 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. June 30, 2026: Data Theorem launched three AI security capabilities that together form a closed-loop platform covering exploit discovery, remediation, and runtime defense.

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

Sources

Assail full record

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

Data Theorem full record

  1. [1]Data theorem unveils code secure fully integrated ast product with sast sca and sbom management 302269428Data Theorem via PR Newswire · prnewswire.com · published October 8, 2024 · Tier A
  2. [2]datatheorem.comData Theorem · datatheorem.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Solutions | Data TheoremData Theorem · undated page, accessed October 24, 2026 · Tier A
  4. [4]DevSecOps: Security in Every Stage, From Code to Runtime | Data TheoremData Theorem · undated page, accessed October 24, 2026 · Tier A
  5. [5]Products | Data TheoremData Theorem · undated page, accessed October 24, 2026 · Tier A
  6. [6]Mobile SecureData Theorem · undated page, accessed October 24, 2026 · Tier A
  7. [7]Mobile ProtectData Theorem · undated page, accessed October 24, 2026 · Tier A
  8. [8]Data Theorem | AppSec | API Security | Cloud SecurityData Theorem · undated page, accessed October 24, 2026 · Tier A
  9. [9]ASPM: Application Security Posture Management | Data TheoremData Theorem · undated page, accessed October 24, 2026 · Tier A
  10. [10]Data Theorem Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed October 24, 2026 · Tier C
  11. [11]Regulatory Compliance | Audit-Ready Reports | Data TheoremData Theorem · undated page, accessed November 3, 2026 · Tier A
  12. [12]AI-Driven Application Security (AppSec) | Data TheoremData Theorem · undated page, accessed November 3, 2026 · Tier A
  13. [13]AI Runtime Protection for Apps and APIs | Data TheoremData Theorem · undated page, accessed November 3, 2026 · Tier A
  14. [14]Code SAST Secure: SAST, SCA, SBOM and AI Auto-RemediationData Theorem · undated page, accessed November 3, 2026 · Tier A
  15. [15]API Security Testing and Runtime Protection | API SecureData Theorem · undated page, accessed November 3, 2026 · Tier A
  16. [16]Cloud Security for APIs and Cloud-Native Apps | Cloud SecureData Theorem · undated page, accessed November 3, 2026 · Tier A
  17. [17]Data Theorem Launches the Industry’s First Closed-Loop AI Security PlatformData Theorem · published June 30, 2026 · Tier A

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