Egress

What the company sells

Egress, a KnowBe4 company, is a cloud email security provider that says it continuously assesses human risk and dynamically adapts policy controls, defending against advanced phishing attacks and outbound data breaches. Egress says it uses contextual machine learning and neural networks, with integration through a cloud-native API architecture. Egress says KnowBe4's acquisition of Egress created the largest AI-driven cybersecurity platform for managing human risk. KnowBe4 says it entered into a definitive agreement to acquire Egress.

Defend is KnowBe4's inbound email security solution. Defend uses AI and natural language processing to map historical communication patterns and identify anomalies. Defend rewrites links and checks them at time of click, and Defend detects QR codes within email. Active and malicious code is automatically disabled from HTML message bodies and attachments. Sender policy verification lookup and validation are performed on every message for SPF, DKIM and DMARC. Defend filters graymail to a separate folder. Defend uses AI to automate inspection of user-reported phishing emails and remediate attacks across the enterprise.

Defend performs time-of-click inspection to detect malicious URLs that are weaponized post-delivery. Phishing is one of the most common attack vectors for ransomware. Egress says 90% of ransomware starts with a phish and that Defend uses AI-powered analysis to stop malicious links and payloads.

On the outbound side, security administrators can configure their risk appetite for data exfiltration and deploy KnowBe4 Prevent to block activity, warn users when they are about to contravene policy, or monitor user activity without end-user notification. Prevent uses AI technology to analyze recipients for signals that an address may be a personal account linked to the sender. Prevent analyzes attachments for sensitive content and verifies them against the intended recipients. Administrators can control and report on exfiltration incidents through an approve/reject workflow. Protect is secure, certified end-to-end email encryption, and Workspace is a way to collaborate and share securely. The Security Center is a single portal for risk analysis, reporting and incident triage, investigation and response for the KnowBe4 Cloud Email Security products Defend, Prevent and Protect, including a live threat feed.

Defend integrates into Google Workspace and MS Outlook apps on Windows Desktop, Mac, iOS and Android. Defend operates after a SEG, Google or Microsoft 365 has performed analysis. KnowBe4 Cloud Email Security is integrated into Microsoft 365, including support for Mac and OWA users.

KnowBe4 says attackers increasingly target attorneys and support staff, who have access to valuable client information. KnowBe4 also addresses financial services organizations, with email and human error as the focus. A customer quoted by KnowBe4 selected Defend and Prevent as added security layers in its Microsoft 365 environment.

The KnowBe4 Platform provides attack simulation and training, email and collaboration security, and agent security powered by AIDA (Artificial Intelligence Defense Agents) and a proprietary Risk Score. KnowBe4 says more than 70,000 organizations worldwide trust it. KnowBe4, Inc gives its address as 33 N Garden Ave, Suite 1200, Clearwater, FL 33755. Vista Equity Partners took KnowBe4 private, and KnowBe4 raised $300 million in a round led by KKR.

KnowBe4 states that all of its products are SSAE18 SOC 2 Type 2 certified and Cyber Essentials certified. KnowBe4 has been audited against the International Organization for Standardization 27001:2022 standard covering information security controls and the 42001:2023 standard covering AI management systems. KnowBe4 maintains compliance with the GDPR. KnowBe4 uses AWS and Azure for data encryption in transit (TLS) and at rest (AES-GCM 256).^{[7][8][9][10][11][12][13][14]}

Categories

• Email security (primary category)
• Data loss prevention
• Human risk management
• Compare Egress with companies in the same categoryside by side

Headquarters

London, United Kingdom^[3]

Founded

2007^[3]

Ownership

Owned by KnowBe4 since 2024^{[1][2][4][5][6]}

CISO on record

Not yet on our record. Send a verified source

Website

egress.com

Products and services

Product names as the company writes them; what each does, in our words, from the company's own product pages. Never how well it does it.

• Defend^{[4][6][7][8][9][13]}

  Inbound email security that stops advanced phishing attacks.

  Defend is KnowBe4's inbound email security solution. Defend uses AI and natural language processing to map historical communication patterns and identify anomalies. Defend rewrites links and checks them at time of click, and detects QR codes within email.

• Prevent^{[4][7][10][13]}

  Stops accidental and malicious data loss.

  Prevent lets security administrators configure their risk appetite for data exfiltration. Prevent can block activity, warn users, or monitor user activity without end-user notification. Prevent analyzes attachments for sensitive content and verifies them against the intended recipients.

• Protect^[4][7]

  Secure, certified end-to-end email encryption.

  Protect is secure, certified end-to-end email encryption. Protect is one of the KnowBe4 Cloud Email Security products covered by the Security Center.

• Workspace^[4][7]

  Collaborate and share securely.

Competitors and alternatives

The other companies on our record filed under the same categories, category by category: first those that lead with that category and share more of Egress's categories, then alphabetical. A list from the record, never a ranking.

• On email security, Egress competes with Barracuda Networks, Cofense, Proofpoint, Sublime Security, Trustifi, Abnormal AI, Hornetsecurity, IRONSCALES, Material Security, Mimecast and 12 more.

• On data loss prevention, Egress competes with Cyberhaven, Fasoo, Forcepoint, Hilt, Jazz, Next DLP, Barracuda Networks, Broadcom, Sublime Security, Trustifi and 19 more.

• On human risk management, Egress competes with Fable Security, Hoxhunt, Keepnet Labs, Living Security, Cofense, Doppel, KnowBe4, NINJIO, Proofpoint, Frame Security and 4 more.

What review platforms show

The headline rating and review count each platform showed in public search results on the day we looked, with the link. We do not read or reproduce the reviews, and a rating is the platform's, not ours.

• G2 · 4.5 out of 5 · 2 reviews^[5]seen October 24, 2026

References

Every fact above cites one of these by number. Tier A is the company itself, a regulator or a filing; tier B is trade or business press.

1. [1]Knowbe4 to acquire egressKnowBe4 · knowbe4.com · published April 24, 2024 · Tier A: the company, a regulator or a filing
2. [2]Knowbe4 completes acquisition of egressKnowBe4 · knowbe4.com · published July 9, 2024 · Tier A: the company, a regulator or a filing
3. [3]Egress software technologies granted patent for secure data exchangeDark Reading · darkreading.com · undated page, accessed September 27, 2026 · Tier B: trade or business press
4. [4]Egress, a KnowBe4 Company | Anti-Phishing, Data Loss Prevention & EncryptionEgress, a KnowBe4 Company · undated page, accessed October 24, 2026 · Tier A: the company, a regulator or a filing
5. [5]Egress Solutions Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed October 24, 2026 · Tier C
6. [6]About Us | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
7. [7]Defend datasheetKnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
8. [8]Stop Account Takeover with Defend | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
9. [9]Stop Ransomware with Defend | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
10. [10]Stop Data Exfiltration with Prevent | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
11. [11]Advanced graymail detection with Defend | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
12. [12]Secure Your Legal Practice: Humans & AI Agents | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
13. [13]Financial Services Security Awareness Training | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing
14. [14]Security Statement | Legal | KnowBe4KnowBe4 · undated page, accessed November 4, 2026 · Tier A: the company, a regulator or a filing

Last verified November 2, 2026. Our code found the quoted passage behind each fact on its source page when the fact was recorded, and re-checks every record against its sources each month.

Recorded September 27, 2026, expanded November 4, 2026 from the references above.

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