Building Secure Software

Secure design as a property of how you build, not a gate at the end.

At enterprise scale, security can't be the step that waits for a review. It has to be present while software is being designed and written, across every team, without slowing delivery. ThreatModeler^® Nexus™ makes secure design part of the build itself, so the work ships with its threats already understood.

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Threat model everything. Start wherever you are.

The shift

The question was never whether to threat model. It's when and where.

Software gets built three ways at once: from a design, straight into code with no design doc, and on top of systems already in production. Secure design has to meet each of those, not insist on a single right moment.

"We have a design phase for some projects and none for others. Security can't assume there's a diagram to start from."

Model from a design, or from the code. The System Mapping Agent builds a model from architecture artifacts when they exist, and infers the structure from the repository when they don't. Defining the intended design is the step you can't skip, and it doesn't have to come first.

"Security shows up after the work is done, and by then changing the design is expensive."

Bring it into the build. Through the MCP Server, secure design reaches the IDE and the pipeline, so developers see threats and approved mitigations as they work rather than in a report weeks later.

"Every team builds securely in its own way, so nothing is consistent across the org."

Make one practice the default. Prebuilt templates, reusable components, and approved content give every team the same secure starting point, so good design is the path of least resistance.

Where it meets the work

Secure design at the speed software actually moves.

ThreatModeler Nexus is a threat modeling platform first: it shows what could go wrong in a system so you can design the risk out. The MCP Server carries that into the development workflow, so security is present in the build instead of bolted on after.

Earlier

From documents

Turn product requirements, architecture docs, and policies into a living threat model before a line of code exists, so design decisions are informed from the start.

In the flow

In the IDE

Developers create and maintain models from the repository inside the AI coding tools they already use. Secure design lives where the work happens.

Every change

In CI/CD

Each pull request is checked against the model automatically, with governance enforced on every change, so the design stays current as the software grows.

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Built-in confidence

Secure software, built on facts instead of assumptions.

A consistent practice across every team, present in the build, with a deterministic framework that keeps AI working on your approved content. Backed by the Threat Research Center: more than a decade of curated research, 3,500+ security requirements, 1,500+ threats, and 500+ prebuilt templates.

See what could go wrong, before it does.

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