Your technology should be built to withstand pressure.
We help privacy and security-conscious businesses build AI systems, automate operations, and ship software with security and privacy at the foundation.
Services
What we build, evaluate, and harden.
Whether you need something built right from the start or need an expert set of eyes on what you already have, security is the lens on every engagement.
Secure AI Development
We design and build AI pipelines, fine-tuned models, and generative AI systems with data handling, access controls, and compliance built in from the start. Not bolted on after.
Learn more →AI-Built Application Audit
Had an application built with AI coding tools like Cursor, Claude, or Copilot? We audit the output for security gaps, architectural weaknesses, and hidden risks that AI-generated code consistently introduces.
Learn more →Secure Integrations and Automation
We build MCP servers, RAG pipelines, workflow automations, and system integrations that move data between tools without exposing it to unnecessary risk.
Learn more →Architecture and Threat Assessment
We review your application architecture with a builder's eye and an attacker's mindset. Threat modeling, trust boundary analysis, and design recommendations grounded in real-world experience.
Learn more →Secure Production Planning and Hardening
Whether you are going live for the first time or tightening what is already running, we handle infrastructure, deployment, monitoring, and configuration hardening for systems that cannot afford downtime.
Learn more →Not sure where to start?
Let us figure it out together →Why Fault Line
We build the systems we secure.
Security expertise from people who build production systems.
Most security firms audit from the outside. We bring decades of experience designing, shipping, and operating production platforms in the same industries we serve. That means when we assess your architecture or build your AI pipeline, the work comes from people who have faced the same constraints and made the same decisions you are making.
We specialize in working with healthcare organizations, law firms, educational institutions, and other businesses where data privacy is not optional and security failures have real consequences.
More about how we work →