CISO Tribune

Vendor comparison · 2 companies

Assail vs Terra 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. Terra Platform™ covers web, API, AI, external network, and internal network pentesting. CISO Tribune files both under Breach simulation and automated pen-testing and API 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
  • Terra Security
Assail vs Terra Security: 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.comTerra SecurityTerra Platform™ covers web, API, AI, external network, and internal network pentesting.terra.security
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.
  • Terra Platform™Unifies continuous agentic pentesting across AI systems, network infrastructure, and web apps.
  • Terra Offensive Research Collaboration Hub (TORCH)[3]Lets users work directly with Terra agents and control every step of the process.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
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]
  • May 20, 2026Terra Security announced public preview of continuous exploitation validation for network infrastructure, available to all customers within the Terra Platform.[15]
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
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
October 21, 2026November 13, 2026

Where they overlap

  • Breach simulation and automated pen-testing is the primary category of both Assail and Terra Security; both are also filed under API security.

Where they differ, field by field

  • Assail is also filed under Mobile security. Terra Security is also filed under AI model and agent security.
  • Assail lists Ares, Reaper and Assail Anywhere. Terra Security lists Terra Platform™ and Terra Offensive Research Collaboration Hub (TORCH).
  • Assail is privately held.

How they differ

CISO Tribune files both Assail and Terra Security under Breach simulation and automated pen-testing as the primary category. Assail sells Ares, which it describes as continuous autonomous red teaming across web applications, APIs, and mobile apps. Assail also sells Reaper, built for military, federal, and intelligence missions, and Assail Anywhere, a deployment option for the entire platform including the AI model. Terra Security sells Terra Platform™, which unifies continuous agentic pentesting across AI systems, network infrastructure, and web apps. Terra Security also sells the Terra Offensive Research Collaboration Hub (TORCH), which lets users work directly with Terra agents and control every step of the process.

On deployment, Assail says the entire platform can run on-premises, in air-gapped networks, in the customer's own cloud, or through its SaaS. Terra Platform™ runs as multi-tenant SaaS, as a single-tenant instance in the customer cloud account, or on the customer hardware. Terra Security says its reports are signed by certified pentesters and map to SOC 2 Type II. Terra Security also says its testing is tied to the CI/CD pipeline. Assail describes Ares as testing authenticated applications through the customer's existing identity provider. Assail is privately held.

Assail says it sells mainly to security teams in manufacturing, financial services, federal and state government, automotive, retail, and defense. On November 4, 2026, Assail announced Cassandra, a proactive AI agent integrated into its Ares platform. On July 7, 2026, Assail launched Sidewinder, a rebuilt second-generation version of Ares. On May 20, 2026, Terra Security announced public preview of continuous exploitation validation for network infrastructure, available to all customers within the Terra Platform.

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: Terra Security

What Terra Platform™ does
Terra Platform™ runs continuous, agentic pentesting tied to the CI/CD pipeline. Terra Platform™ covers web, API, AI, external network, and internal network pentesting. Terra Platform™ runs as multi-tenant SaaS, as a single-tenant instance in the customer cloud account, or on the customer hardware.
What Terra Offensive Research Collaboration Hub (TORCH) does[3]
The Terra Offensive Research Collaboration Hub (TORCH) lets users work directly with Terra agents. The Terra Offensive Research Collaboration Hub (TORCH) lets users control every step of the process.

Questions about Assail and Terra Security

What do Assail and Terra Security sell?
Assail sells Ares, Reaper and Assail Anywhere. Terra Security sells Terra Platform™ and Terra Offensive Research Collaboration Hub (TORCH).
Are Assail and Terra Security in the same category?
Yes. Breach simulation and automated pen-testing is the primary category of both on CISO Tribune.
Who owns Assail and Terra Security?
Assail is privately held.
Who are Assail and Terra 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 Terra 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. May 20, 2026: Terra Security announced public preview of continuous exploitation validation for network infrastructure, available to all customers within the Terra 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

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

Terra Security full record

  1. [1]terra.securityTerra Security · terra.security · undated page, accessed November 13, 2026 · Tier A
  2. [2]terra.securityTerra Security · terra.security · published October 28, 2026 · Tier A
  3. [3]Agentic Offensive Security Platform | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  4. [4]Consolidate Offensive Security Tools | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  5. [5]End Alert Fatigue | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  6. [6]Continuous Validation | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  7. [7]Reduce Exposure Dwell Time | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  8. [8]Security & AppSec | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  9. [9]Compliance & GRC | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  10. [10]Prove Compliance Continuously | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  11. [11]Replace Legacy Pentests | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  12. [12]Pricing | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  13. [13]CISOs | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  14. [14]About | Terra SecurityTerra Security · undated page, accessed November 13, 2026 · Tier A
  15. [15]Terra Security Launches Network Penetration Testing as the Only Continuous Agentic Platform for Web Apps, AI Systems, and InfrastructureBusiness Wire · published May 20, 2026 · Tier A

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