CISO Tribune

Vendor comparison · 2 companies

Assail vs Imperva

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. Imperva sells an Application Security Platform that protects against application and API attacks without impacting legitimate users. CISO Tribune files both under 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
  • Imperva
Assail vs Imperva: 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.comImpervaImperva sells an Application Security Platform that protects against application and API attacks without impacting legitimate users.imperva.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.
  • Web Application Firewall (WAF)[9][12]Imperva WAF protects applications in any environment, cloud or on-premises.
  • Advanced Bot Protection[4][5][9][11][17]Imperva Advanced Bot Protection protects websites, mobile apps and APIs from sophisticated automated attacks.
  • API Security[4][5][9][17]Imperva API Security provides continuous protection of all APIs.
  • DDoS Protection[5][9][12]Imperva’s advanced DDoS protection defends against volumetric, protocol-based and Layer 7 attacks.
  • Client-Side Protection[9][13]Imperva Client-Side Protection safeguards against client-side attacks like formjacking, digital skimming and Magecart.
  • AI Application Security[5][14]Imperva AI Application Security is engineered for the unique architecture of LLMs.
  • Data Security Fabric[15]Imperva Data Security Fabric is purpose-built for hybrid multicloud environments.
  • Content Delivery Network[9]Imperva's Secure Content Delivery Network (CDN) accelerates the delivery of content and applications.
Categories
Headquarters
Not stated on its pagesRedwood Shores, United States[3]
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Privately heldOwned by Thales[1][5][7][8][10]
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]
  • August 24, 2026Thales Imperva introduced the SSL Integration Center, a framework connecting Imperva Cloud WAF with certificate lifecycle management platforms, launching with a DigiCert integration.[19]
  • August 3, 2026Thales launched Imperva for AWS, which provides web application, API and bot protection for AWS environments.[6]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 6, 2026[7]
  • Gartner Peer Insights: listed, seen November 6, 2026[8]
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, Imperva sells mainly to organizations that need to protect applications and APIs in public or private cloud, hybrid and on-premises environments. Imperva addresses retail organizations that need to protect customers' data and secure applications, APIs, and cloud networks. Imperva addresses businesses aiming to comply with PCI DSS 4.0 standards while defending against client-side attacks. Imperva describes support for compliance in highly regulated industries across hybrid and multicloud environments. Imperva describes a purpose-built solution to secure AI applications for homegrown GenAI.
Last verified
October 21, 2026September 27, 2026

Where they overlap

  • Assail and Imperva are both filed under API security.

Where they differ, field by field

  • Assail's primary category is Breach simulation and automated pen-testing; Imperva's is WAF and WAAP.
  • Assail is also filed under Mobile security. Imperva is also filed under Bot and abuse management and DDoS protection.
  • Assail lists Ares, Reaper and Assail Anywhere. Imperva lists Web Application Firewall (WAF), Advanced Bot Protection, API Security, DDoS Protection, Client-Side Protection and 3 more.
  • Imperva is headquartered in Redwood Shores, United States.
  • Assail is privately held. Imperva is owned by Thales.

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: Imperva

What Web Application Firewall (WAF) does[9][12]
Imperva says managed rules written and tested by the Imperva Threat Research team before deployment allow more than 94% of Imperva customers to deploy the Imperva WAF in blocking mode. Imperva’s Attack Analytics automatically correlates thousands of security alerts into narratives. Imperva’s Terraform provider automates Cloud WAF deployments.
What Advanced Bot Protection does[4][5][9][11][17]
Advanced Bot Protection safeguards websites, mobile apps and APIs from bot attacks, including all OWASP 21 Automated Threats. Imperva says its multi-layered approach detects malicious bots by combining direct client interrogation, behavior analysis, machine learning, connection characteristics and threat intelligence feeds.
What DDoS Protection does[5][9][12]
Imperva offers a guaranteed 3-second mitigation SLA for Layers 3 and 4 DDoS attacks. Imperva DDoS Protection for Networks shields entire infrastructures with 13 Tbps of multi-terabit scrubbing capacity. Imperva DDoS Protection for Websites works alongside a cloud web application firewall (WAF) to block attacks and malicious bots.
What Client-Side Protection does[9][13]
Imperva Client-Side Protection enables security teams to manage client-side resources and JavaScript while streamlining compliance with PCI DSS 4.0 requirements 6.4.3 and 11.6.1. Client-Side Protection automatically blocks known malicious domains based on data from the Imperva Threat Research Team.
What Data Security Fabric does[15]
Imperva Data Security Fabric protects all your data assets. Imperva data security reveals critical insight including sensitive data location, users, access, and risk. Imperva offers out-of-the-box support for over 100 data repositories, on-prem or in cloud.

Questions about Assail and Imperva

What do Assail and Imperva sell?
Assail sells Ares, Reaper and Assail Anywhere. Imperva sells Web Application Firewall (WAF), Advanced Bot Protection, API Security, DDoS Protection, Client-Side Protection and 3 more.
Are Assail and Imperva in the same category?
They share API security. Assail's primary category is Breach simulation and automated pen-testing and Imperva's is WAF and WAAP.
Where are Assail and Imperva headquartered?
Imperva is headquartered in Redwood Shores, United States.
Who owns Assail and Imperva?
Assail is privately held. Imperva is owned by Thales.
Who are Assail and Imperva 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, Imperva sells mainly to organizations that need to protect applications and APIs in public or private cloud, hybrid and on-premises environments.
What have Assail and Imperva 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. August 24, 2026: Thales Imperva introduced the SSL Integration Center, a framework connecting Imperva Cloud WAF with certificate lifecycle management platforms, launching with a DigiCert integration.

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

Imperva full record

  1. [1]Thales completes acquisition imperva creating global leaderThales Group · thalesgroup.com · published December 4, 2023 · Tier A
  2. [2]AboutImperva · imperva.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Greg clark joins imperva board of directorsImperva · imperva.com · published June 4, 2014 · Tier A
  4. [4]Application securityImperva · imperva.com · published August 23, 2026 · Tier A
  5. [5]Cyber Security Leader | Imperva, Inc.Imperva · undated page, accessed October 25, 2026 · Tier A
  6. [6]Thales Launches Imperva for AWS to Help Organizations Protect Applications and APIsBusiness Wire · published August 3, 2026 · Tier A
  7. [7]Imperva Data Security Fabric Reviews & Product Details - G2G2 · undated page, accessed October 25, 2026 · Tier C
  8. [8]Thales Group (Imperva) Reviews - Gartner Peer InsightsGartner Peer Insights · undated page, accessed October 25, 2026 · Tier C
  9. [9]Best Application Security | Imperva WAAP ProtectionImperva · undated page, accessed November 6, 2026 · Tier A
  10. [10]Web Application Firewall (WAF) | Cloud & On-Prem | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  11. [11]Advanced Bot Protection | Stop Advanced Bots | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  12. [12]Advanced DDoS Protection & Mitigation Services | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  13. [13]Client-Side Protection | PCI 4.0 Compliance | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  14. [14]Enterprise AI & LLM Security | Stop Prompt Injection | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  15. [15]Data Security Solutions | Protecting Data Everywhere | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  16. [16]Plans and Services | Imperva Cyber SecurityImperva · undated page, accessed November 6, 2026 · Tier A
  17. [17]Retail & eCommerce Cyber Security | Secure Online Transactions | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  18. [18]Data Security Fabric | Protect All Data Types | ImpervaImperva · undated page, accessed November 6, 2026 · Tier A
  19. [19]Bring Your Own CA: Introducing the Thales Imperva SSL Integration Center, Featuring DigiCert Trust Lifecycle ManagerImperva · published August 24, 2026 · Tier A

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