CISO Tribune

Vendor comparison · 2 companies

SquareX vs Trustifi

SquareX sells a Browser Detection and Response (BDR) solution that organizations use to detect, mitigate and threat-hunt client-side attacks. Trustifi sells a platform that uses AI, behavioral analysis and threat intelligence to detect phishing, business email compromise and malicious content across email, Teams, OneDrive and SharePoint. CISO Tribune files both under Data loss prevention. 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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Up to four companies side by side.

  • SquareX
  • Trustifi
SquareX vs Trustifi: Products, Customers and Funding Compared
SquareXSquareX sells a Browser Detection and Response (BDR) solution that organizations use to detect, mitigate and threat-hunt client-side attacks.sqrx.comTrustifiTrustifi sells a platform that uses AI, behavioral analysis and threat intelligence to detect phishing, business email compromise and malicious content across email, Teams, OneDrive and SharePoint.trustifi.com
What it sells
  • Browser Detection and Response (BDR)[2][7][9]Detects, mitigates and threat-hunts client-side web attacks against employees in real time.
  • SquareX Browser Extension (Enterprise Browser)Installs as an extension that turns any browser on any device into an enterprise-grade secure browser.
  • Browser DLP[2]Applies data loss prevention controls inside the browser to secure any browser on any device.
  • Outbound Shield[2][3][9]Scans and encrypts outgoing email according to administrators' policies.
  • Account Takeover Protection[2][5][11]Monitors and reports suspicious user email behavior using AI engines.
  • Email Security Awareness Training[12]Email security awareness training platform for staff.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Owned by Zscaler since 2026[3][10]Privately held[1][4]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • February 6, 2026Zscaler announced its acquisition of SquareX, a Singapore-based browser detection and response technology startup.[10]
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[4]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, SquareX sells mainly to organizations that want to detect, mitigate and threat-hunt client-side attacks. SquareX describes access for contractors and BYOD users through a containerized browser session. SquareX describes developer environments built from containerized desktops tailored to each developer or team. SquareX access controls work across managed, unmanaged and BYOD devices.Not written yet
Last verified
November 2, 2026September 27, 2026

Where they overlap

  • SquareX and Trustifi are both filed under Data loss prevention.

Where they differ, field by field

  • SquareX's primary category is Browser protection extensions; Trustifi's is Email security.
  • Trustifi is also filed under Collaboration app security and Security awareness training.
  • SquareX lists Browser Detection and Response (BDR), SquareX Browser Extension (Enterprise Browser) and Browser DLP. Trustifi lists Outbound Shield, Account Takeover Protection and Email Security Awareness Training.
  • SquareX is owned by Zscaler, since 2026. Trustifi is privately held.

What it sells: Trustifi

What Outbound Shield does[2][3][9]
Outbound Shield automatically scans and encrypts outgoing email messages according to administrators' policies. Emails that contain sensitive information are automatically secured.
What Account Takeover Protection does[2][5][11]
Account takeover protection monitors and reports suspicious company user email behavior, using AI engines. It employs machine learning to profile typical login behavior. Security account administrators are notified automatically when compromised access to a user login account is detected.

Questions about SquareX and Trustifi

What do SquareX and Trustifi sell?
SquareX sells Browser Detection and Response (BDR), SquareX Browser Extension (Enterprise Browser) and Browser DLP. Trustifi sells Outbound Shield, Account Takeover Protection and Email Security Awareness Training.
Are SquareX and Trustifi in the same category?
They share Data loss prevention. SquareX's primary category is Browser protection extensions and Trustifi's is Email security.
Who owns SquareX and Trustifi?
SquareX is owned by Zscaler, since 2026. Trustifi is privately held.
Who are SquareX and Trustifi sold to?
From its own pages, SquareX sells mainly to organizations that want to detect, mitigate and threat-hunt client-side attacks.
What have SquareX and Trustifi announced recently?
February 6, 2026: Zscaler announced its acquisition of SquareX, a Singapore-based browser detection and response technology startup.

About SquareX

SquareX sells a Browser Detection and Response (BDR) solution that organizations use to detect, mitigate and threat-hunt client-side attacks. SquareX runs entirely in the browser. SquareX works with major browsers including Chrome, Edge, FireFox and Safari. SquareX does not require enterprises to use a custom browser.[7][8][9]

SquareX focuses on securing the browser against modern threats. SquareX describes the browser as the place where nearly all work and a vast majority of cyberattacks occur today. SquareX's built-in Browser Detection and Response (BDR) capabilities detect and mitigate web-based threats such as phishing, malicious file downloads and browser-based malware in real time. SquareX has discovered and disclosed multiple zero days. SquareX researches and predicts the evolution of attacks, drawing on experience in offensive security. SquareX holds that security should not come at the cost of user experience and productivity.[7][9]

SquareX planned the launch of its enterprise product for the RSA Conference 2024 in San Francisco.[8]

SquareX's browser-based model does not require client software or virtual desktop agents to be installed on user devices. SquareX enables secure access within the user's native browser session, so users do not shift between virtual and local desktops. SquareX allows administrators to define access policies for the entire virtual environment and for each web application and internal resource. Per-application policy management limits users to accessing only what they need. SquareX access controls are device-agnostic and work across managed, unmanaged and BYOD devices. SquareX's browser-based access gives contractors and BYOD users a containerized browser session that operates independently of the local device environment.[8][9]

SquareX enables developer-specific environments, packaging thick clients through containerized desktops tailored to the workflows of each developer or team. In containerized developer desktops, developers can use IDEs like VS Code, command-line tools, database servers and other development utilities directly in their browsers.[1][2][4][5][6][8][9]

SquareX on the record

Sources

SquareX full record

  1. [1]Squarex discloses architectural limitations of browser devtools in debugging malicious extensions 302518583SquareX via PR Newswire · prnewswire.com · published July 31, 2025 · Tier A
  2. [2]sqrx.comSquareX · sqrx.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Zscaler acquires squarexZscaler · zscaler.com · published February 5, 2026 · Tier A
  4. [4]Showcasing our Industry-First BDR Solution in Singapore | by SquareX | SquareX LabsSquareX Labs · published October 23, 2024 · Tier A
  5. [5]An Evening of Browser Security: SquareX’s RSAC Networking Dinner | by SquareX | SquareX LabsSquareX Labs · published May 7, 2025 · Tier A
  6. [6]SquareX | Browser Detection and Response (BDR) SolutionSquareX · undated page, accessed October 28, 2026 · Tier A
  7. [7]SquareX: Pioneering Browser Detection and Response (BDR)SquareX · undated page, accessed November 10, 2026 · Tier A
  8. [8]SquareX Receives the Technology Excellence Award by SBR in Cybersecurity, Internet and New Media Category | by SquareX | SquareX LabsSquareX Labs · undated page, accessed November 10, 2026 · Tier A
  9. [9]6 Reasons Why Enterprises Are Shifting from VDI to SquareX | by Engineering @ SquareX | SquareX LabsSquareX Labs · undated page, accessed November 10, 2026 · Tier A
  10. [10]Zscaler extends zero-trust security to browsers with SquareX acquisition | CSO OnlineCSO Online · published February 6, 2026 · Tier B

Trustifi full record

  1. [1]Trustifi raises 25m series a to scale ai email security platform 302471421Trustifi via PR Newswire · prnewswire.com · published June 3, 2025 · Tier A
  2. [2]ProductsTrustifi · trustifi.com · published September 15, 2026 · Tier A
  3. [3]Integrations · Trustifi DocumentationTrustifi · undated page, accessed October 29, 2026 · Tier A
  4. [4]Trustifi Email Security Reviews & Product DetailsG2 · undated page, accessed October 29, 2026 · Tier C
  5. [5]Trustifi | Better Security for Email and Microsoft Office 365Trustifi · undated page, accessed November 3, 2026 · Tier A
  6. [6]Email Anti Spoofing | Security SoftwareTrustifi · undated page, accessed November 3, 2026 · Tier A
  7. [7]Email Security Services for Companies | AI-Powered Solutions | TrustifiTrustifi · undated page, accessed November 3, 2026 · Tier A
  8. [8]Products and Features | TrustifiTrustifi · undated page, accessed November 3, 2026 · Tier A
  9. [9]Outbound Email Security | TrustifiTrustifi · undated page, accessed November 3, 2026 · Tier A
  10. [10]Collaboration Shield | TrustifiTrustifi · undated page, accessed November 3, 2026 · Tier A
  11. [11]Account Takeover Protection | Compromised Account DetectionTrustifi · undated page, accessed November 3, 2026 · Tier A
  12. [12]Email Security Awareness Training | TrustifiTrustifi · undated page, accessed November 3, 2026 · Tier A
  13. [13]Advanced Cloud Email Archiving | TrustifiTrustifi · undated page, accessed November 3, 2026 · Tier A

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