CISO Tribune

Vendor comparison · 2 companies

HackerOne vs Tamnoon

HackerOne puts Continuous Threat Exposure Management (CTEM) in practice through a continuous loop of discovery, validation, prioritization and remediation. Tamnoon sells an engine that investigates findings from existing scanners and runs remediations it has proven safe through the customer's own change process. CISO Tribune files both under Exposure prioritisation and CTEM. 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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  • HackerOne
  • Tamnoon
HackerOne vs Tamnoon: Products, Customers and Funding Compared
HackerOneHackerOne puts Continuous Threat Exposure Management (CTEM) in practice through a continuous loop of discovery, validation, prioritization and remediation.hackerone.comTamnoonTamnoon sells an engine that investigates findings from existing scanners and runs remediations it has proven safe through the customer's own change process.tamnoon.io
What it sells
  • H1 Platform[2][3][6][8]Discovers, validates, prioritizes and remediates exploitable risk across the attack surface.
  • H1 Bounty[3]A product in which Hai supports triage, report summaries, and remediation guidance.
  • H1 Code[2]Available with opt-in frontier cyber model access.
  • H1 Code Security Audit[2]Uses agentic analysis to catch flaws built over years of releases.
  • Tami[4]Tamnoon's AI Cloud Security Agent, which enriches each alert with context.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Not stated on its pagesNot stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • July 29, 2026HackerOne launched H1 Remediation, a new H1 Platform capability that delivers developer-ready fix plans for validated, exploitable findings.[6]
  • June 2, 2026HackerOne announced the H1 Platform, an agentic AI platform for continuous discovery, validation, prioritization and remediation of exposures.[8]
  • March 18, 2026HackerOne launched Agentic Prompt Injection Testing, a capability that checks whether AI systems can be exploited under real-world adversarial conditions.[7]
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: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, HackerOne sells mainly to teams operationalizing continuous exposure management and to complex, security-mature organizations, with platform coverage also described for the largest, most complex organizations. For AI security work, HackerOne names frontier labs and global enterprises as organizations it serves. Enterprises that need documentation showing AI systems were tested against recognized security and governance standards are also addressed.From its own pages, the company sells mainly to security teams that already run a cloud scanner, and it offers a page for each scanner it lists. One use case page addresses teams facing more criticals than any team can absorb. This is our reading of the pages, not a recommendation.
Last verified
November 4, 2026September 27, 2026

Where they overlap

  • Exposure prioritisation and CTEM is the primary category of both HackerOne and Tamnoon.

Where they differ, field by field

  • HackerOne is also filed under Bug bounty and crowdsourced testing, Penetration testing and red team services and Vulnerability management. Tamnoon is also filed under Managed security service providers.
  • HackerOne lists H1 Platform, H1 Bounty, H1 Code and H1 Code Security Audit. Tamnoon lists Tami.

How they differ

CISO Tribune files both HackerOne and Tamnoon under Exposure prioritisation and CTEM as their primary category. HackerOne also appears under Bug bounty and crowdsourced testing, Penetration testing and red team services, and Vulnerability management. Tamnoon is additionally filed under Managed security service providers.

HackerOne sells the H1 Platform, which discovers, validates, prioritizes and remediates exploitable risk across the attack surface, with an agentic orchestrator called Hai. Its lineup also includes H1 Bounty, where HackerOne's global community of researchers continues to do the finding, plus H1 Code and H1 Code Security Audit. For AI security, HackerOne names frontier labs and global enterprises as organizations it serves. On July 29, 2026, HackerOne launched H1 Remediation, which delivers developer-ready fix plans for validated, exploitable findings.

Tamnoon sells Tami, an AI Cloud Security Agent that enriches each alert with context. Tamnoon also sells an engine that investigates findings from existing scanners and runs remediations it has proven safe through the customer's own change process. Tamnoon sells mainly to security teams that already run a cloud scanner. Tamnoon was established in 2021, and its investors include cybersecurity industry experts and angel investors. One media enterprise used Tamnoon's managed cloud security service to move from Check Point CloudGuard to Wiz.

What it sells: HackerOne

What H1 Platform does[2][3][6][8]
The H1 Platform has a multi-model harness that broadens coverage, validates outputs, and traces findings to root cause. Hai is the agentic AI orchestrator that powers automation across the H1 Platform. Hai scores every incoming finding and surfaces what is actually exploitable in the customer's environment. Each product is an entry point into the full H1 Platform.
What H1 Bounty does[3]
Within H1 Bounty, Hai supports a team with triage, report summaries, and remediation guidance. HackerOne's global community of researchers continues to do the finding.
What H1 Code Security Audit does[2]
H1 Code Security Audit is available with opt-in frontier cyber model access. Agentic analysis catches flaws built over years of releases.

Questions about HackerOne and Tamnoon

What do HackerOne and Tamnoon sell?
HackerOne sells H1 Platform, H1 Bounty, H1 Code and H1 Code Security Audit. Tamnoon sells Tami.
Are HackerOne and Tamnoon in the same category?
Yes. Exposure prioritisation and CTEM is the primary category of both on CISO Tribune.
Who are HackerOne and Tamnoon sold to?
From its own pages, HackerOne sells mainly to teams operationalizing continuous exposure management and to complex, security-mature organizations, with platform coverage also described for the largest, most complex organizations. From its own pages, the company sells mainly to security teams that already run a cloud scanner, and it offers a page for each scanner it lists.
What have HackerOne and Tamnoon announced recently?
July 29, 2026: HackerOne launched H1 Remediation, a new H1 Platform capability that delivers developer-ready fix plans for validated, exploitable findings.

About HackerOne

HackerOne puts Continuous Threat Exposure Management (CTEM) in practice through a continuous loop of discovery, validation, prioritization and remediation. The H1 Platform continuously discovers, validates, prioritizes and remediates exploitable risk across the entire attack surface. The H1 Platform operationalizes CTEM as a single connected system, with Hai as the agentic orchestration layer across every stage. Each product is an entry point into the full H1 Platform.[1][2]

Hai is HackerOne's agentic AI orchestrator, powering automation across the H1 Platform. Hai coordinates agents across every stage of the platform as a single connected system. Hai scores every incoming finding and surfaces what is actually exploitable in the customer's environment. Within H1 Bounty, Hai supports a team with triage, report summaries, and remediation guidance. HackerOne's global community of researchers continues to do the finding.[2][3]

Remediation guidance routes each finding to the right owner with full exploit context, delivered into the tools a team already uses. Retests confirm that fixes hold, and regression monitoring catches recurrences before they reopen. Core capabilities include continuous asset discovery and exposure scoring, workflow automation, and 36+ integrations. Cross-program dashboards track exposure velocity, remediation speed, and signal quality. Return on Mitigation is self-serve and gives a measure of avoided financial loss. The H1 Platform's multi-model harness broadens coverage, validates outputs, and traces findings to root cause.[2]

HackerOne's product lineup covers several kinds of testing. Always-on agentic testing continuously finds, validates and proves exploitable vulnerabilities across applications. Source code-informed fix plans are delivered in one click to engineering. AI code security reviews pull requests, validates exploitability and delivers context-aware fixes into developer workflows. Incentivized, time-boxed testing focuses researchers on a specific scope or objective. H1 Code, H1 Code Security Audit, and H1 Remediation are available with opt-in frontier cyber model access, adding deeper reasoning across the codebase.[2][4]

HackerOne combines human-led offensive testing with agentic adversarial validation for AI security. HackerOne tests models, retrieval pipelines, tools, APIs, and agent workflows to validate where systems can be exploited under real adversarial pressure. AI red teaming is adversarial testing built for AI systems, models, agents, and their integrations. H1 AI Red Teaming engagements include agent-driven testing to validate prompt injection exploitability across retrieval pipelines, tool permissions, and agent workflows. Validated findings and reproducible attack traces are delivered in the HackerOne Platform. AI red teaming reports can be mapped to NIST AI RMF, SOC 2, ISO 42001, HITRUST, and GDPR frameworks. HackerOne has tested 1,700+ AI assets across customer scopes.[3][4][5]

Anthropic CISO Jason Clinton chose HackerOne's full-stack red teaming to uncover hidden risks across AI models, applications, and system integrations. HackerOne names frontier labs and global enterprises as organizations it serves with AI security testing.[2][3][5]

HackerOne on the record

Sources

HackerOne full record

  1. [1]NewsroomHackerOne · hackerone.com · undated page, accessed November 4, 2026 · Tier A
  2. [2]Platform Overview | HackerOneHackerOne · undated page, accessed November 10, 2026 · Tier A
  3. [3]H1 AI Red Teaming | Offensive Testing for AI Models | HackerOneHackerOne · undated page, accessed November 10, 2026 · Tier A
  4. [4]HackerOne | Leader in Continuous Threat Exposure Management | Security for AIHackerOne · undated page, accessed November 10, 2026 · Tier A
  5. [5]AI Cybersecurity Solutions: AI Red Teaming, Penetration Testing, Vulnerability Testing | HackerOneHackerOne · undated page, accessed November 10, 2026 · Tier A
  6. [6]HackerOne Launches H1 Remediation to Accelerate the Path from Validated Exposure to Verified Fix | HackerOneHackerOne · published July 29, 2026 · Tier A
  7. [7]HackerOne Launches Agentic Prompt Injection Testing as AI Vulnerabilities Surge 540% | HackerOneHackerOne · published March 18, 2026 · Tier A
  8. [8]H1 Platform Delivers Continuous Threat Exposure Management at AI Scale with Validated Exploitability | HackerOneHackerOne · published June 2, 2026 · Tier A

Tamnoon full record

  1. [1]tamnoon.ioTamnoon · tamnoon.io · undated page, accessed September 27, 2026 · Tier A
  2. [2]Tamnoon integrates with crowdstrike falcon cloud security to extend cloud risk remediation workflows 302884275Tamnoon via PR Newswire · prnewswire.com · published September 22, 2026 · Tier A
  3. [3]Tamnoon | The Self-Healing Engine for Cloud ExposuresTamnoon · undated page, accessed October 29, 2026 · Tier A
  4. [4]How it heals | TamnoonTamnoon · undated page, accessed October 29, 2026 · Tier A
  5. [5]Integrations | TamnoonTamnoon · undated page, accessed October 29, 2026 · Tier A
  6. [6]After a fix broke production | TamnoonTamnoon · undated page, accessed November 10, 2026 · Tier A
  7. [7]How Zinnia Resolves 65% of High-Severity Misconfigurations | TamnoonTamnoon · undated page, accessed November 10, 2026 · Tier A
  8. [8]Media Conglomerate Migrates from Check Point to Wiz | TamnoonTamnoon · undated page, accessed November 10, 2026 · Tier A
  9. [9]About: the healing gap | TamnoonTamnoon · undated page, accessed November 10, 2026 · Tier A
  10. [10]The Security Leader’s Guide to Securing Cloud EnvironmentsTamnoon · undated page, accessed November 10, 2026 · Tier A

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