Threat Modeling as a Service (TMaaS)

Threat Modeling as a Service (TMaaS) is a managed service in which an external team of threat modeling specialists builds and maintains threat models for an organization’s applications and systems — identifying how each could be attacked, which threats matter most to the business, and which countermeasures to prioritize — without the organization having to staff and train that capability in-house.

VerSprite delivers TMaaS using PASTA (Process for Attack Simulation and Threat Analysis), the risk-centric threat modeling methodology co-created by VerSprite CEO Tony UcedaVélez. Your teams get finished, risk-ranked threat models for new and existing applications, delivered on demand or on a continuous cycle that keeps pace with development.

What Is Threat Modeling?

Threat modeling is the practice of analyzing a system’s design from an attacker’s perspective to identify threats, weaknesses, and attack paths before they reach production. A widely used way to frame it is Adam Shostack’s Four Question Framework, also reflected in the Threat Modeling Manifesto:

1. What are we working on?
2. What can go wrong?
3. What are we going to do about it?
4. Did we do a good job?

PASTA answers those questions with a business-risk lens: it starts from business objectives, uses threat intelligence to decide which threats are realistic, and ranks countermeasures by business impact rather than by threat category alone.

What You Get: A PASTA Threat Model, Stage by Stage

Every VerSprite TMaaS threat model produces concrete outputs at each of PASTA’s seven stages:

For the full methodology, see PASTA Threat Modeling.

Delivery Models

• Point-in-time threat models for a specific application, release, or architecture change.
• Continuous TMaaS with threat models built for new projects and updated as designs change, on an agreed cadence.
• Hybrid in which VerSprite builds models alongside your security team and reviews models they create.
• Capability building in which VerSprite delivers models while training your team in PASTA, so threat modeling becomes self-sustaining over time.

Engagements cover web applications, mobile applications, APIs, cloud architectures, and complex enterprise systems, and can start at any point from early design through to systems already in production.

Built on Fork, VerSprite’s Threat Modeling Platform

Threat models are living documents, and keeping them current is where most programs fail. VerSprite TMaaS can be delivered in Fork, VerSprite’s PASTA threat modeling platform, so models stay maintained, searchable, and consistent across your portfolio instead of living in slide decks and spreadsheets. See Continuous Threat Modeling with Fork.

When TMaaS Makes Sense

• Development velocity outpaces your security team’s ability to review designs.
• You need threat models for compliance or customer assurance, but don’t have trained threat modelers.
• You’re launching a new product, re-architecting for cloud, or integrating new third-party services.
• Your existing threat models are inconsistent across teams or out of date.
• You want to build an internal threat modeling program and need experienced practitioners to start it.

Threat Modeling and Compliance

Threat modeling is required or expected by a growing set of security frameworks and regulations:

• NIST Secure Software Development Framework (SSDF, SP 800-218) — calls for risk modeling such as threat modeling during software design.
• FDA premarket cybersecurity guidance — expects threat modeling as part of the security risk management documentation for medical devices.
• OWASP SAMM — includes threat assessment and threat modeling as a core practice for measuring software security maturity.
• EU Cyber Resilience Act — requires manufacturers of products with digital elements to perform cybersecurity risk assessments.
• PCI DSS, HIPAA, and SOC 2 — threat models provide documented evidence of design-level risk analysis for systems handling regulated data.

PASTA vs. STRIDE: Why VerSprite Uses PASTA

STRIDE, developed at Microsoft, is a threat categorization model: it classifies threats as Spoofing, Tampering, Repudiation, Information disclosure, Denial of service, or Elevation of privilege. It’s useful for brainstorming threats against individual components. PASTA is a full risk-centric process: it starts from business objectives, uses threat intelligence to focus on realistic threats, validates them through attack modeling, and ranks results by business impact. STRIDE categories can be used inside PASTA’s threat analysis stage; PASTA adds the business context that tells you which threats to fix first. For tool comparisons, see Threat Modeling Tools Compared.

Which VerSprite Threat Modeling Service Fits?