
Smarter Aerospace & Defense Requirements Management for Complex Programs
Built for Government, Defense, and Aerospace Programs
Stell is the trusted, US-based management solution for aerospace and defense engineers, aerospace manufacturers, and defense contractors. Outdated tools and programs can put projects at risk, which can be dangerous with rising compliance demands and high-stakes mission planning. Stell reliably simplifies compliance tracking and ensures mission assurance, all while helping you avoid expensive mistakes and accelerate delivery timelines. Stell helps you organize across teams, all while protecting national security investments.

Mission Assurance Starts with Modern Requirements Management
Engineering teams across the aerospace and defense industries face a growing list of compliance standards. Standards like MIL-STD-498, DO-178C, and regulations like ITAR can feel like a burden during the design process, but are easy to navigate with Stell. Legacy tools like Excel and other non-robust systems cannot keep up with demanding supply chains, and low traceability can lead to delayed launches or millions of dollars wasted. Stell integrates both automation and scale, ensuring mission assurance and compliance readiness. Service branches of the US DoD, like the US Space Force (USSF), have already begun modernizing workflows with Stell to streamline integration because of our secure and innovative platform’s performance.
Reduce Risk, Cut Costs, Deliver Faster
Stell launches compliance into forward progress. High traceability across project timelines effortlessly links contract clauses to subsystem verification so that any gaps are identified early. Audit readiness is integrated into Stell’s platform with exportable evidence that accelerates government reviews. Collaboration between primes, subcontractors, and agencies has also never been easier with Stell. With fewer rework loops and million-dollar mistakes, and a faster path to acceptance, Stell revolutionizes productivity and reliability. Stell is actively partnered with Space Systems Command (SSC) to accelerate mission assurance at a high level and scale.

Stell’s Defense & Aerospace-Ready Features
Proprietary Tools for Contractors & Agencies
Stell’s PDF Import tool ingests government and defense contracts and converts them into actionable data. The smart Document-to-Matrix workflow structures requirements for allocation, verification, and change control. Complex language and requirements defined by MIL-STD-498, DO-178C, ISO 26262, and more can be easily navigated with Cross-Standard Search. Convenient MBSE support also includes a dual document + spreadsheet UI, AI tagging, graphical relationship views, and parametric modeling at early stages to assign parameters computational meaning.
Secure Collaboration Across Contractors & Agencies
The Supplier Sharing Portal allows you to work securely across the supply chain without losing control. Stell’s tools enable permissioned exchanges between primes and subs and ensure clear communication of requirements and progress throughout the engineering process. Stell enables teams to ramp in 45 minutes - not 45 days- so adoption sticks and usage remains high. Stell enables fast coordination, fewer handoff errors, and clean audit trails across multi-tier programs.
Integration with Engineering & Public Sector Toolchains
Stell integrates seamlessly with the stack that engineers already run. Track requirement status, verification progress, and risk by Work Breakdown Structure (WBS) or Contracts Data Requirements Lists (CDRLs). Stell can be deployed as a standalone MBSE solution or integrated with existing models based on the specific preferences and requirements of any team’s projects.
Why Government & Industry Leaders Trust Stell
With security in mind, Stell is operated and built in the United States to apply defense-grade security. Agencies and contractors use Stell to simplify compliance, increase traceability, and shorten review cycles across teams. Direct and ongoing collaboration with the U.S. Space Force ensures Stell’s mission-assurance impact and reliability on active government programs and beyond.
Powering Government Programs Like the U.S. Space Force
Stell works directly with the Engineering, Launch, and Integration offices at Space Systems Command to accelerate launch mission assurance and streamline integration throughout mission planning. The focus: automating manual document processing so that engineers can move efficiently with fewer errors and arrive at reviews with complete evidence and organization, not surprises.
Innovations include adaptations to Stell’s commercial product to accelerate launch mission assurance and integration workflows, focused on automating manual and tedious document processing tasks.
Contract
AFWERX Direct to Phase II
Term
February 2024 - November 2025
Practical MBSE for the Warfighter
Stell can be deployed as a standalone MBSE solution or connected to a program’s existing MBSE model for convenience. The interface combines document and spreadsheet views seamlessly with AI tagging, graphical relationship views, and parametric modeling so requirements, numbers, and parameters carry computational meaning. Training and onboarding take only 45 minutes, not weeks, with Stell’s user-friendly platform.
SYSML 2.0
Stell’s atomic data model decomposes text and system data to integrate with SYSML 1.0 and 2.0, in order to preserve model fidelity while ensuring traceability.
GRAPHICAL VIEWS
Beautiful and clear graphical views enable the visualization of parent/child requirements, interfaces, and verification artifacts in order to expose gaps early on, mitigating risk.
PARAMETRIC MODELLING
Text requirements are easily associated with parameters, units, and equations to reliability support analysis and verification at scale. (Product under development, TRL 3 - contact us for details.)

Get Started with Stell for Aerospace & Defense
Conquer compliance, security, and efficiency while never disrupting your toolchain with Stell. Stell aligns primes, subs, agencies, and manufacturers, while simplifying audits and schedules to securely and reliably accelerate high-level engineering programs. Stell is built for government and industry programs that can’t afford delays and necessitate a reliable partner that’s there every step of the way.