Changelog

New updates and improvements

December 2025 - Visitor Identity (Server-Issued Visitor ID)

We introduced a server-issued, site-scoped visitorId to reliably link events from the same real device across sessions, without depending on client-side storage.

Reliable Device Linking

• Introduced advanced server-side visitor identification to track devices across sessions without persistent client-side storage

• Implemented consistent ID generation logic to ensure reliable user recognition across visits

• Added intelligent matching capabilities to handle minor environment fluctuations and updates

Enhanced Matching Accuracy

• Incorporated robust multi-signal device analysis to achieve higher identification precision

• Added network-level intelligence and tie-breaking logic to significantly reduce false positives

• Improved identification stability across changing network conditions and browsing contexts

Privacy Mode Resilience

• Improved identification performance in incognito and private browsing modes

• Enhanced stability for privacy-hardened browser configurations and strict privacy settings

• Maintained accuracy even when common anti-fingerprinting measures are active

Strict Signal Validation

• Implemented advanced validation logic to prevent false positive matches between similar devices

• Added strict consistency checks for high-confidence signals to ensure identity integrity

• Enforced rigorous verification standards to distinguish between legitimate users and emulation attempts

October 2025 - 🚧 Closed Beta - Internal Testing Phase

Guardian Stack is currently in closed beta with select partners. This changelog tracks our progress as we refine fraud detection accuracy and expand platform capabilities.

Enhanced Bot Detection Algorithm

• Improved detection accuracy for sophisticated headless browsers and automation frameworks

• Added support for identifying newer anti-detect browser signatures

• Reduced false positives on legitimate browser extensions and accessibility tools

Read the documentation

VPN Detection Improvements

• Enhanced residential proxy detection across major providers

• Better accuracy for legitimate privacy tools vs. fraud-focused VPN usage

• Added confidence scoring for VPN detection results

Read the documentation

Server SDK Helper Functions

• Introduced boolean helper functions for quick fraud decisions (isBot(), isVPN(), isTampering())

• Added detailed indicator extraction methods for advanced analysis

• Improved error handling and null-safe operations across all helpers

Read the documentation

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