Zast AI

Zast AI runs AI agents against application codebases to find security vulnerabilities using deep semantic analysis, control flow graphs and threat modeling to understand application logic, rather than simple pattern or signature matching. Its central claim, branded ‘Triple ZERO,’ is zero false positives, zero manual effort, and zero-day coverage, achieved by not reporting a vulnerability unless the platform can actually generate a working proof-of-concept exploit for it. The product ships as a SaaS platform (ZAST) alongside an IDE extension (ZAST Express) for in-editor findings.

The company is backed by Zoo Capital, a venture firm focused on AI and cybersecurity, and holds Google for Startups partner status. Its subscription model spans free, Pro ($20/month), and enterprise credit-based tiers, positioning it as an accessible tool for individual developers as well as larger engineering organizations.

Exploit-validated vulnerability findings are a genuinely appealing answer to the false-positive fatigue that plagues most static analysis tools, but Zast AI is a very young company (its own copyright dates to 2026) with no disclosed funding round, customer names, or independent efficacy testing, so the zero-false-positive claim should be treated as an unverified vendor claim for now.