CISO Tribune

Vendor comparison · 2 companies

Assail vs Pentera

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. Pentera sells a platform that combines AI-powered adversarial testing, risk-based prioritization, and automated remediation into one workflow. 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
  • Pentera
Assail vs Pentera: 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.comPenteraPentera sells a platform that combines AI-powered adversarial testing, risk-based prioritization, and automated remediation into one workflow.pentera.io
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.
  • Pentera Platform[4][8]A platform that combines AI-powered adversarial testing, risk-based prioritization, and automated remediation.
  • Pentera Resolve[4][10]Remediation workflows for validated findings.
  • Automated Pentesting[4][10]Automated pentests that teams launch whenever their environment changes.
  • Automated Red Teaming[4][11]Software-driven adversary emulation on demand.
  • Security Validation Advisory (SVA)[6]Practitioners who guide and refine a customer's exposure validation strategy.
Categories
Headquarters
Not stated on its pagesBoston, United States
Founded
Not stated on its pages2015[1][9]
Ownership and funding
Privately heldPrivately held[2][4][5][6][7]
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]
Not stated on its pages
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[7]
  • 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, Pentera sells mainly to security teams that want to test their defenses against real attacks, whether or not they have a red team. Pentera says organizations without dedicated red team resources and existing red teams can both use its automated red teaming. Pentera says SecVal gives the CISO fresh data on the true impact of threats on the business. Its advisory service draws on experience across financial services, healthcare, manufacturing and critical infrastructure. Pentera says its platform supports every phase of CTEM, so programs built around that approach are a stated focus.
Last verified
October 21, 2026November 2, 2026

Where they overlap

  • Breach simulation and automated pen-testing is the primary category of both Assail and Pentera.
  • Both are privately held.

Where they differ, field by field

  • Assail is also filed under API security and Mobile security.
  • Assail lists Ares, Reaper and Assail Anywhere. Pentera lists Pentera Platform, Pentera Resolve, Automated Pentesting, Automated Red Teaming and Security Validation Advisory (SVA).
  • Pentera is headquartered in Boston, United States.
  • Pentera was founded in 2015.

How they differ

CISO Tribune files both Assail and Pentera under breach simulation and automated pen-testing as their primary category, and both are privately held. Assail sells Ares, which it describes as continuous autonomous red teaming across web applications, APIs, and mobile apps, and CISO Tribune also files Assail under API security and mobile security. Assail also sells Reaper, autonomous offensive cyber operations built for military, federal, and intelligence missions, and Assail Anywhere, a deployment option for the entire platform including the AI model. Pentera sells the Pentera Platform, which combines AI-powered adversarial testing, risk-based prioritization, and automated remediation. Pentera also sells Pentera Resolve for remediation workflows, Automated Pentesting, Automated Red Teaming, and Security Validation Advisory.

The two overlap in autonomous testing of web applications and APIs, and both describe testing applications behind an identity provider or SSO. They differ in emphasis: Pentera pairs testing with remediation workflows where teams assign ownership, route tickets, and track SLAs, while Assail names military, federal, and intelligence missions for Reaper. Assail says it supports on-premises, air-gapped, own-cloud, and SaaS deployment. Pentera is headquartered in Boston, United States, was founded in 2015, and lists investors including Evolution Equity Partners, Insight Partners, and Blackstone.

Assail publishes industry pages for manufacturing, financial services, federal and state government, automotive, retail, and defense, and names Branch as a customer. Pentera describes advisory experience across financial services, healthcare, manufacturing, and critical infrastructure. On November 4, 2026, Assail announced Cassandra, an AI agent integrated into Ares, and on July 7, 2026, it launched Sidewinder, a second-generation version of Ares. Assail has also expanded Reaper's sovereign deployment architecture to AWS GovCloud and Google Cloud Assured Workloads.

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: Pentera

What Pentera Platform does[4][8]
The Pentera Platform automates exposure management from find to fix. Proven security risks found during adversarial testing move directly into Pentera's automated remediation. Findings from Pentera Core, Cloud and Surface are aggregated into a single, unified view.
What Pentera Resolve does[4][10]
Pentera Resolve mobilizes remediation through automated workflows. Teams consolidate findings, assign ownership, route tickets, track SLAs, and automatically retest fixes.
What Automated Pentesting does[4][10]
Automated pentesting helps teams test continuously, validate real exploitable exposure, and measure risk reduction over time. Teams can launch pentests without waiting for consultants, scheduling engagements, or adding headcount. Tests can start with a few clicks, a scheduled scenario, or a natural-language prompt through an LLM via Pentera's MCP server.
What Automated Red Teaming does[4][11]
Pentera's automated red teaming replicates real-world attacker behavior on demand and at enterprise scale. Pentera says it is designed to expand access to adversarial testing, not replace it.
What Security Validation Advisory (SVA) does[6]
Security Validation Advisory (SVA) draws on insights from thousands of enterprise customers and decades of hands-on experience in penetration testing, red teaming, and offensive security consulting. Customers work directly with offensive security practitioners who guide and refine their exposure validation strategy.

Questions about Assail and Pentera

What do Assail and Pentera sell?
Assail sells Ares, Reaper and Assail Anywhere. Pentera sells Pentera Platform, Pentera Resolve, Automated Pentesting, Automated Red Teaming and Security Validation Advisory (SVA).
Are Assail and Pentera in the same category?
Yes. Breach simulation and automated pen-testing is the primary category of both on CISO Tribune.
Where are Assail and Pentera headquartered?
Pentera is headquartered in Boston, United States.
When were Assail and Pentera founded?
Pentera was founded in 2015.
Who owns Assail and Pentera?
Assail is privately held. Pentera is privately held.
Who are Assail and Pentera 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, Pentera sells mainly to security teams that want to test their defenses against real attacks, whether or not they have a red team.
What have Assail and Pentera 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.

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

Pentera full record

  1. [1]About usPentera · pentera.io · undated page, accessed September 27, 2026 · Tier A
  2. [2]Pentera secures 60m to lead security validation market consolidation and drive next phase of growth 302399599Pentera via PR Newswire · prnewswire.com · published March 12, 2025 · Tier A
  3. [3]Pentera nabs 60m at a 1b valuation to build simulated network attacks to train security teamsTechCrunch · techcrunch.com · published March 12, 2025 · Tier B
  4. [4]Pentera | Exposure Validation Platform | AI-Driven TestingPentera · undated page, accessed October 27, 2026 · Tier A
  5. [5]Red Team & Offensive Security Services | PenteraPentera · undated page, accessed October 27, 2026 · Tier A
  6. [6]Security Validation Advisory & Cyber Risk Consulting | PenteraPentera · undated page, accessed October 27, 2026 · Tier A
  7. [7]Pentera Reviews 2026: Details, Pricing, & Features - G2G2 · undated page, accessed October 27, 2026 · Tier C
  8. [8]Pentera | Security Validation Platform for Exposure ReductionPentera · undated page, accessed November 3, 2026 · Tier A
  9. [9]About Pentera | Proactive Security ValidationPentera · undated page, accessed November 3, 2026 · Tier A
  10. [10]Automated Pentesting - PenteraPentera · undated page, accessed November 3, 2026 · Tier A
  11. [11]Red Teaming - PenteraPentera · undated page, accessed November 3, 2026 · Tier A
  12. [12]AI-Native Web Application Testing - PenteraPentera · undated page, accessed November 3, 2026 · Tier A
  13. [13]Automated Threat-Led Penetration Testing (TLPT) - PenteraPentera · undated page, accessed November 3, 2026 · Tier A
  14. [14]What Is Automated Security Validation (ASV)?Pentera · undated page, accessed November 3, 2026 · Tier A

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