CISO Tribune

Vendor comparison · 2 companies

Intruder vs Red Sift

Intruder sells a single platform for continuous scanning across infrastructure, apps and cloud environments. Red Sift helps security and IT teams embrace the security protocols that keep the internet safe, such as DMARC, SPF, DKIM and TLS. CISO Tribune files both under External attack surface management. 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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  • Intruder
  • Red Sift
Intruder vs Red Sift: Products, Customers and Funding Compared
IntruderIntruder sells a single platform for continuous scanning across infrastructure, apps and cloud environments.intruder.ioRed SiftRed Sift helps security and IT teams embrace the security protocols that keep the internet safe, such as DMARC, SPF, DKIM and TLS.redsift.com
What it sells
  • Attack Surface Management[1][8]Finds assets outside an inventory and shows monitored ports and services.
  • Application Security[3]Continuous dynamic application security testing for web apps and single-page apps.
  • Cloud Security[1][3][9]Agentless scanning across AWS, Azure and Google Cloud.
  • Red Sift OnDMARC[2][9]Email authentication product for DMARC enforcement.
Categories
Headquarters
London, United Kingdom[2]London, United Kingdom[5][6]
Founded
2015[2][4]2015[3]
Ownership and funding
Not stated on its pagesPrivately held[2][4][15]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
Not stated on its pages
  • October 21, 2026Red Sift notified customers with potentially affected hosts after scanning the Hardenize customer base for PHP-backed hosts, following the PHP security fixes.[18]
G2 and Gartner Peer Insights
  • G2: listed, seen November 12, 2026[13]
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 4, 2026[15]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
Not written yetFrom its own pages, the company sells mainly to security and IT teams that want to adopt protocols such as DMARC, SPF, DKIM and TLS. Save the Children also appears as a customer story for OnDMARC. The about page says the company works across EMEA, APAC and the US.
Last verified
November 12, 2026September 27, 2026

Where they overlap

  • Intruder and Red Sift are both filed under External attack surface management.
  • Both are headquartered in London, United Kingdom.
  • Both were founded in 2015.

Where they differ, field by field

  • Intruder's primary category is Vulnerability management; Red Sift's is Email authentication and DMARC.
  • Intruder is also filed under Cloud security posture management and Penetration testing and red team services. Red Sift is also filed under Digital risk protection and Machine identity and PKI.
  • Intruder lists Attack Surface Management, Application Security and Cloud Security. Red Sift lists Red Sift OnDMARC.
  • Red Sift is privately held.

What it sells: Intruder

What Attack Surface Management does[1][8]
It connects to AWS, Azure, Google Cloud, and Cloudflare accounts and takes any domains and IPs. The attack surface view shows every monitored port, the service running on it, and the version behind it.
What Application Security does[3]
Application Security provides continuous dynamic application security testing (DAST) for web apps, single-page apps and underlying infrastructure, including authenticated scanning behind login pages. A ZAP-powered scanner runs over 75 application checks and integrates with CI/CD pipelines through GitHub, GitLab, Jira and Azure DevOps.
What Cloud Security does[1][3][9]
Cloud Security runs agentless scanning across AWS, Azure and Google Cloud for misconfigurations, insecure permissions, exposed secrets and critical vulnerabilities. CSPM checks run daily and trigger when the environment changes. Intruder scans container images at the registry level.

What it sells: Red Sift

What Red Sift OnDMARC does[2][9]
Red Sift OnDMARC gives instant visibility into a domain's email security posture and a clear path to DMARC enforcement. It lets customers configure SPF, DKIM, DMARC, BIMI and MTA-STS in one place. Red Sift says it helps organizations reach full DMARC enforcement in just 6 to 8 weeks.

Questions about Intruder and Red Sift

What do Intruder and Red Sift sell?
Intruder sells Attack Surface Management, Application Security and Cloud Security. Red Sift sells Red Sift OnDMARC.
Are Intruder and Red Sift in the same category?
They share External attack surface management. Intruder's primary category is Vulnerability management and Red Sift's is Email authentication and DMARC.
Where are Intruder and Red Sift headquartered?
Both are headquartered in London, United Kingdom.
When were Intruder and Red Sift founded?
Both were founded in 2015.
Who owns Intruder and Red Sift?
Red Sift is privately held.
Who are Intruder and Red Sift sold to?
From its own pages, the company sells mainly to security and IT teams that want to adopt protocols such as DMARC, SPF, DKIM and TLS.
What have Intruder and Red Sift announced recently?
October 21, 2026: Red Sift notified customers with potentially affected hosts after scanning the Hardenize customer base for PHP-backed hosts, following the PHP security fixes.

About Intruder

Intruder sells a single platform for continuous scanning across infrastructure, apps and cloud environments. Intruder was founded in 2015 by Chris Wallis to help solve the information overload crisis in vulnerability management. Intruder Systems Ltd completed the AICPA Service Organization Control (SOC) 2 Type 2 audit. The Intruder portal runs as a SaaS environment with logical data separation between clients' datasets.[5]

Intruder runs emerging threat scans within hours of new critical vulnerabilities going public. Intruder checks systems for 170,000+ infrastructure weaknesses, 75+ web-layer security issues and other misconfigurations. Intruder emerging threat scans check systems for newly discovered vulnerabilities automatically, as soon as a check is available. Intruder is powered by scanners including Tenable, Nuclei, OpenVas, and ZAP. Intruder offers internal target scanning only on the Pro and Enterprise plans.[6][7]

Intruder describes attack surface management as the continuous process of discovering, assessing, and reducing every digital asset an attacker can reach, including systems that are unknown or unmanaged. Port scans run daily in Intruder to track what is exposed. New service scans trigger in Intruder when something in the environment changes, and emerging threat scans run when a major new vulnerability is disclosed. The Intruder attack surface view shows every monitored port, the service running on it, and the version behind it, with a screenshot of each web service. Users of the Intruder attack surface view can search or filter by port, service, product, host status, or certificate expiry.[1][8]

Intruder cloud security needs no agents and connects to AWS, Azure, and Google Cloud accounts. Intruder connects to cloud accounts using read-only access, and nothing is deployed into the infrastructure. Intruder scans container images at the registry level. Intruder shows cloud misconfigurations, exposed secrets, insecure permissions, CVEs, and attack surface issues in one place.[8][9]

A ZAP-powered scanner in Intruder runs over 75 application checks for injection flaws, misconfigurations and zero-days. The same Intruder scanner integrates with CI/CD pipelines through GitHub, GitLab, Jira and Azure DevOps, and prioritizes results with remediation advice.

Intruder takes a white-box approach, working from source code. Intruder's agents are built and trained by CREST-certified pentesters and validate every finding against the application. Intruder delivers AI pentest results in a report containing an executive summary, full technical details, and remediation guidance. Intruder formats the AI pentest report to serve as compliance evidence for frameworks like SOC 2, ISO 27001, PCI DSS, and Cyber Essentials. Intruder also connects to a Bitbucket code repo to run a pentest on demand.[10][11]

Intruder integrates with Jira, GitHub, GitLab, Azure DevOps, and ServiceNow for issue tracking, Slack and Microsoft Teams for alerts, Drata and Vanta for compliance, and Microsoft Sentinel for SIEM. Intruder syncs container images from Docker Hub accounts for scanning. Intruder syncs targets from a Cloudflare environment and scans them for vulnerabilities. Intruder supports Okta SSO for authenticating users. Intruder prices the Cloud and Pro plans as a base fee plus a fee-per-target. Intruder quotes Enterprise pricing separately, because it depends on requirements and the size and complexity of the customer's systems. Customers can choose either a monthly rolling plan, which can be cancelled at any time, or an annual plan.[7][9][11]

Ravelin uses Intruder for continuous vulnerability scanning of its payment systems. Brainlabs relies on Intruder to find unknowns as new acquisitions reshape its attack surface. Hill & Smith uses Intruder to uncover hidden assets and expand visibility of its attack surface. Litmus uses Intruder to automate security and protect customer data. Surveil partnered with Intruder to gain attack surface visibility.[1][7][8][9][10]

Intruder on the record

Sources

Intruder full record

  1. [1]intruder.ioIntruder · intruder.io · undated page, accessed November 12, 2026 · Tier A
  2. [2]CareersIntruder · intruder.io · undated page, accessed November 12, 2026 · Tier A
  3. [3]Intruder | Stop Breaches Before They StartIntruder · undated page, accessed November 12, 2026 · Tier A
  4. [4]Intruder About Us | Providing Effortless Cyber SecurityIntruder · undated page, accessed November 12, 2026 · Tier A
  5. [5]Intruder Security | How We Keep Your Data SecureIntruder · undated page, accessed November 12, 2026 · Tier A
  6. [6]Solution TemplateIntruder · undated page, accessed November 12, 2026 · Tier A
  7. [7]Intruder Pricing | Plans & Bolt-onsIntruder · undated page, accessed November 12, 2026 · Tier A
  8. [8]Attack Surface Management for Shadow IT and Exposures | IntruderIntruder · undated page, accessed November 12, 2026 · Tier A
  9. [9]Cloud Security for AWS, Azure and Google Cloud in One View | IntruderIntruder · undated page, accessed November 12, 2026 · Tier A
  10. [10]AI Pentesting: On-Demand Web App Pentests in Hours | IntruderIntruder · undated page, accessed November 12, 2026 · Tier A
  11. [11]Integrations | Jira, Slack, Vanta, AWS & MoreIntruder · undated page, accessed November 12, 2026 · Tier A
  12. [12]Customer Success Stories | IntruderIntruder · undated page, accessed November 12, 2026 · Tier A
  13. [13]Intruder Reviews 2026: Details, Pricing, & FeaturesG2 · undated page, accessed November 12, 2026 · Tier C

Red Sift full record

  1. [1]redsift.comRed Sift · redsift.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]The Red Sift Pulse PlatformRed Sift · undated page, accessed September 27, 2026 · Tier A
  3. [3]Cloud email security brand protection startup red sift rises 54mSiliconANGLE · siliconangle.com · published February 24, 2022 · Tier B
  4. [4]6977295001Austin American-Statesman · statesman.com · published March 4, 2022 · Tier B
  5. [5]Red sift joins future fifty 2026 cohort unveiled by chancellor at downing streetRed Sift via EIN Presswire · thestarpress.com · published March 19, 2026 · Tier B
  6. [6]Red siftThe Wealth Mosaic · thewealthmosaic.com · undated page, accessed September 27, 2026 · Tier C
  7. [7]Red Sift | Creating a Fundamentally Safer Internet with Proactive SecurityRed Sift · undated page, accessed October 27, 2026 · Tier A
  8. [8]Proactive, intelligent security for every organization.Red Sift · undated page, accessed October 27, 2026 · Tier A
  9. [9]Red Sift OnDMARC | Stop Email Spoofing FastRed Sift · undated page, accessed October 27, 2026 · Tier A
  10. [10]OnDMARC Pricing | Plans for SMB to Enterprise + Free TrialRed Sift · undated page, accessed October 27, 2026 · Tier A
  11. [11]Stop lookalike domains before they damage your brandRed Sift · undated page, accessed October 27, 2026 · Tier A
  12. [12]Bird & Bird strengthens trust in legal communications with layered email and domain protectionRed Sift · undated page, accessed October 27, 2026 · Tier A
  13. [13]Find and fix issues 10x faster with Red Sift RadarRed Sift · undated page, accessed October 27, 2026 · Tier A
  14. [14]Red Sift Certificates Lite | Free Certificate MonitoringRed Sift · undated page, accessed October 27, 2026 · Tier A
  15. [15]Red Sift OnDMARC Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed October 27, 2026 · Tier C
  16. [16]How to Price and Package DMARC Services for Your MSP | Red SiftRed Sift · undated page, accessed November 4, 2026 · Tier A
  17. [17]DMARC solutions for healthcare organizationsRed Sift · undated page, accessed November 4, 2026 · Tier A
  18. [18]Critical PHP vulnerabilities CVE-2026-109618 and CVE-2026-109619 | Red SiftRed Sift · published October 21, 2026 · Tier A

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