Cline Security
Application and AI security for startups
From zero to a real security program
Cline Security is a boutique consultancy helping early-stage and AI-native startups build real security programs — threat models, pipeline integrations, foundational policies, and the operational scaffolding your first security hire needs to be effective from day one instead of starting from zero. Founded by a staff security engineer with a decade in product and AI security.
Hardening, not auditing
How we work
Every engagement starts with understanding what you've already built and where you actually are — not a one-size playbook. We embed alongside your team, ship working artifacts (threat models in your repo, security tooling in your CI/CD, runbooks your team will use), and design the program to be operable by your first internal security hire. Engagements are scoped tight and built to leave you with something real.
Artifacts, not advice
AI changed the threat model. Most security firms haven't caught up
Let's get to work
Cline Security takes a small number of clients each quarter. If you're building something serious — especially AI-native — and you know security needs to be real before your next round, your first enterprise deal, or your first incident, let's talk.