The collaborative platform to design, test & iterate
Physical Engineering AI to design, test, & iterate
in minutes
Complex Hardware
Complex Hardware
Complex Hardware
in minutes
Requirements Management + Physical Engineering Al that accelerates development
Requirements Management + Engineering AI
to break down team silos
A new way to collaborate with cross-functional teams
Requirements
Assign, review, and iterate requirements and key design parameters
Architecture
Systems
Test
Integrate
AI Agents
Requirements
Assign, review, and iterate requirements and key design parameters
Architecture
Create interface manage changes seamlessly
Systems
Seamless collaboration for non-system engineers
Test
Streamline test orchestration with visual runs and statuses
Integrate
Live requirement status via integrations. CI/CD for systems
AI Agents
Flow's AI agent accelerates critical design and test work
A new way to collaborate with cross-functional teams
Requirements
Assign, review, and iterate requirements and key design parameters
Architecture
Systems
Test
Integrate
AI Agents
Accelerate alignment. A single source of truth for cross-functional design teams.
Systems
Dependencies
Structure requirements
Change how you structure requirement, system, and test, etc by "Levels/Systems"
Systems
Dependencies
Structure requirements
Change how you structure requirement, system, and test, etc by "Levels/Systems"
Systems
Dependencies
Structure requirements
Change how you structure requirement, system, and test, etc by "Levels/Systems"
Configurations
Iterations
Configurations & Iteration
Seamlessly iterate your system across configurations (V1, V2, V3)
Configurations
Iterations
Configurations & Iteration
Seamlessly iterate your system across configurations (V1, V2, V3)
Configurations
Iterations
Configurations & Iteration
Seamlessly iterate your system across configurations (V1, V2, V3)
Engineering AI
Generate design models, automate testing scripts, and identify coverage gaps with enterprise grade secure AI
Engineering AI
Generate design models, automate testing scripts, and identify coverage gaps with enterprise grade secure AI
Engineering AI
Generate design models, automate testing scripts, and identify coverage gaps with enterprise grade secure AI
The next generation of complex hardware is built on Flow
Trusted by tens of thousands of engineers across the most ambitious engineering organizations.
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
The next generation of complex hardware is built on Flow
Trusted by tens of thousands of engineers across the most ambitious engineering organizations.
Lauch
Automotive
EVTOL
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Lauch
Automotive
EVTOL
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Lauch
Automotive
EVTOL
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Lauch
Automotive
EVTOL
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
The next generation of complex hardware is built on Flow
Trusted by tens of thousands of engineers across the most ambitious engineering organizations.
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Automotive
EVTOL
Lauch
None
Fusion
Manufacturing
Fission
Space
Space
Propulsion
Automotive
Aerospace
Aerospace
Drones
Manufacturing
Space Stations
Autonomous security drones
Defense
Satellites
Satellites
Built for cross-functional teams
Where iterative teams meet regulatory compliance
Internal
System Engineering
Software Engineering
Electrical & Mechanical
Test Engineers
External
Regulators
Suppliers & Customers
System Engineers
Spend less time chasing down requirements updates from your engineers and spend more time optimizing your system to build better products.
Built for cross-functional teams
Where iterative teams meet regulatory compliance
Internal
System Engineering
Software Engineering
Electrical & Mechanical
Test Engineers
External
Regulators
Suppliers & Customers
System Engineers
Spend less time chasing down requirements updates from your engineers and spend more time optimizing your system to build better products.
Built for cross-functional teams
Where iterative teams meet regulatory compliance
Internal
System Engineering
Software Engineering
Electrical & Mechanical
Test Engineers
External
Regulators
Suppliers & Customers
System Engineers
Spend less time chasing down requirements updates from your engineers and spend more time optimizing your system to build better products.
A new era of iterative Systems Engineering
Handbook
Iterative System Engineering
40 page playbook on how modern hardware teams apply CI/CD principles.
Handbook
Iterative System Engineering
40 page playbook on how modern hardware teams apply CI/CD principles.
Handbook
Iterative System Engineering
40 page playbook on how modern hardware teams apply CI/CD principles.
The Agile Systems Engineering Handbook (PDF)
A practical guide to modern systems engineering culture and leadership, now available as a shareable PDF. Learn how top teams structure ownership, collaboration, and maturity to move faster with confidence.
The Agile Systems Engineering Handbook (PDF)
A practical guide to modern systems engineering culture and leadership, now available as a shareable PDF. Learn how top teams structure ownership, collaboration, and maturity to move faster with confidence.
AI Hardware Development
Hardware teams are building systems more complex than ever, but coordination capacity is not keeping up. AI will not fix this as a bolt-on feature. The next decade belongs to teams that build AI directly into how engineering systems work.
AI Hardware Development
Hardware teams are building systems more complex than ever, but coordination capacity is not keeping up. AI will not fix this as a bolt-on feature. The next decade belongs to teams that build AI directly into how engineering systems work.
Announcing Flow’s $23M Series A, Led by Sequoia
Flow raises $23M Series A from Sequoia, founders of Stripe & Unity to help hardware teams iterate like software.
Announcing Flow’s $23M Series A, Led by Sequoia
Flow raises $23M Series A from Sequoia, founders of Stripe & Unity to help hardware teams iterate like software.
Inside the SpaceX Internal Design Tool
The Bill of Design (BOD) is how SpaceX turns requirements, ownership, and testing into a single operating system for speed and rigor.
Inside the SpaceX Internal Design Tool
The Bill of Design (BOD) is how SpaceX turns requirements, ownership, and testing into a single operating system for speed and rigor.
Before Flow, we were juggling spreadsheets, duplicate docs, and months of rework. Now it just works. I have not found anything comparable in giving us flexibility without losing functionality.
Rajat Kulshrestha
CEO & Co-founder
We’re building a complex autonomous system, and things change fast. We didn’t want a tool that slows us down. Flow was built for the kind of iterative engineering we actually do.
Chris Eheim
Founder & CTO
We’re building a complex autonomous system, and things change fast. We didn’t want a tool that slows us down. Flow was built for the kind of iterative engineering we actually do.
Ryan McCullough
System Architect
Ryan McCullough
System Architect
Ryan McCullough
System Architect
Ryan McCullough
System Architect
We’re building a complex autonomous system, and things change fast. We didn’t want a tool that slows us down. Flow was built for the kind of iterative engineering we actually do.
Chris Eheim
Founder & CTO
We’re building a complex autonomous system, and things change fast. We didn’t want a tool that slows us down. Flow was built for the kind of iterative engineering we actually do.
Rajat Kulshrestha
CEO & Co-founder
Before Flow, we were juggling spreadsheets, duplicate docs, and months of rework. Now it just works. I have not found anything comparable in giving us flexibility without losing functionality.
Flexible but extremely powerful
Flexible but extremely powerful
Replace the hassle of manually updating spreadsheets or using cumbersome enterprise tools by upgrading your workflow with collaborative requirements management that's always up to date, for everyone.
Generic tools that slow you down with 20+ people
Excel
Jira
Agile and scalable
Agile and scalable
Flow
Expensive legacy tools
Expensive legacy tools
IBM Doors
ITAR Compliance
ITAR Compliance
Self-Managed
Continuous Verification
Continuous Verification
Baselines, config, history
Baselines, config, history
Manual, Static, Self-built Options
Not Requirements Specific
Accessible & Collaborative
Accessible & Collaborative
—
—
MBSE & Architecture
MBSE & Architecture
—
Fast, Flexible & Easy
Fast, Flexible & Easy
—
—
Customization
Customization
—
—
Onboarding Time
Onboarding Time
Setup from scratch, without a guide
30 days trial. Setup manually without a framework
Instant access & 14 days Full Implementation
Instant access & 14 days Full Implementation
60+ day onboarding plan
60+ day onboarding plan
Integrations
Integrations
Excel
Matlab, Python, PLM Simulation, Excel
Matlab, Python, PLM Simulation, Excel
Ansys, Matlab, some PLM
Ansys, Matlab, some PLM
Approx cost (6 editors)
Approx cost (6 editors)
$0
$774/mo
$1000/mo
$1000/mo
$5000/mo
$5000/mo
Enterprise grade security with secure AI
Built for Regulated Engineering
Flow is built for defense, aerospace, energy, and other industries with strict compliance needs. It can be configured for ITAR and export control, with support for data residency and sovereignty. You can deploy it as cloud SaaS, in GovCloud, or in a self hosted environment. It enables secure collaboration across mechanical, electrical, and software teams.
ITAR and CUI compliant
Flow meets the certifications and frameworks modern hardware teams rely on. ITAR and EAR alignment. NIST 800-171 and CUI support. SOC 2 Type II. ISO 27001. GDPR and CCPA compliance.
Private and Secure AI by Design
Flow keeps your data inside your environment. All AI processing runs within controlled boundaries that protect your proprietary IP and meet strict security needs. You get clear visibility into suggestions and accepted changes, plus a full audit trail for every AI action. All AI runs with private inference, and no data is ever used for model training.
Enterprise grade security with secure AI
Built for Regulated Engineering
Flow is built for defense, aerospace, energy, and other industries with strict compliance needs. It can be configured for ITAR and export control, with support for data residency and sovereignty. You can deploy it as cloud SaaS, in GovCloud, or in a self hosted environment. It enables secure collaboration across mechanical, electrical, and software teams.
ITAR and CUI compliant
Flow meets the certifications and frameworks modern hardware teams rely on. ITAR and EAR alignment. NIST 800-171 and CUI support. SOC 2 Type II. ISO 27001. GDPR and CCPA compliance.
Private and Secure AI by Design
Flow keeps your data inside your environment. All AI processing runs within controlled boundaries that protect your proprietary IP and meet strict security needs. You get clear visibility into suggestions and accepted changes, plus a full audit trail for every AI action. All AI runs with private inference, and no data is ever used for model training.
Enterprise grade security with secure AI
Built for Regulated Engineering
Flow is built for defense, aerospace, energy, and other industries with strict compliance needs. It can be configured for ITAR and export control, with support for data residency and sovereignty. You can deploy it as cloud SaaS, in GovCloud, or in a self hosted environment. It enables secure collaboration across mechanical, electrical, and software teams.
ITAR and CUI compliant
Flow meets the certifications and frameworks modern hardware teams rely on. ITAR and EAR alignment. NIST 800-171 and CUI support. SOC 2 Type II. ISO 27001. GDPR and CCPA compliance.
Private and Secure AI by Design
Flow keeps your data inside your environment. All AI processing runs within controlled boundaries that protect your proprietary IP and meet strict security needs. You get clear visibility into suggestions and accepted changes, plus a full audit trail for every AI action. All AI runs with private inference, and no data is ever used for model training.
AI-native systems engineering platform for cross-functional teams
Flow is the AI native platform for modern systems engineering. Lightweight enough for fast iteration and rigorous enough for teams that need clear traceability. We would love to connect and see how Flow supports complex hardware teams in practice.
AI-native systems engineering platform for cross-functional teams
Flow is the AI native platform for modern systems engineering. Lightweight enough for fast iteration and rigorous enough for teams that need clear traceability. We would love to connect and see how Flow supports complex hardware teams in practice.
AI-native systems engineering platform for cross-functional teams
Flow is the AI native platform for modern systems engineering. Lightweight enough for fast iteration and rigorous enough for teams that need clear traceability. We would love to connect and see how Flow supports complex hardware teams in practice.
Iterative Systems Engineering Handbook
This guide is a modern alternative to INCOSE, based on recent, proven experience inside fastest-moving engineering teams. Built in collaboration with the world's fastest teams, it’s designed to support high-speed, real-world engineering needs.