Flow raises $23M Series A from Sequoia
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The default requirements platform for iterative teams

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Lauch

Stoke builds faster and collaborates effortlessly across teams with Flow at the center.

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Automotive

Rivian designs the R1, R2, R3, and future programs in Flow, uniting 1,500 engineers in a single live system of record following a company-wide migration.

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EVTOL

Joby evolves system architecture in Flow, keeping MBSE, requirements, and design updates aligned across teams.

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Satellites

Astranis moves quicker across spacecraft programs by tying fast design changes to live requirements in Flow.

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Satellites

Impulse Space iterates propulsion and mission systems faster with Flow as their live, shared system of record.

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Apex uses Flow to manage high-rate satellite bus production, linking requirements, architectures, and verification so their factory engineers can move at constellation scale.

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Nuclear (SMR)

From 2 to 250 Engineers in 30 Days: How Radiant Adopted Flow to Move Fast and Stay Compliant

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Defense

Long Wall builds programs faster by aligning architecture, requirements, and verification in one structured, MBSE-ready system in Flow.

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Defense

Mach brings order to fast prototype cycles by branching builds, linking tests, and keeping teams aligned in Flow.

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Drones

Skydio keeps fast flight-test cycles aligned by tying every requirement and change to live test results in Flow.

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Manufacturing

Atomic Machines uses Flow to run fast, precise iteration on their programmable manufacturing platform.

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Autonomous security drones

Sunflower Labs chose Flow over JAMA and custom JIRA builds to support real iterative engineering for its autonomous drone-in-a-box platform.

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Space Stations

Gravitics runs faster development cycles for complex space hardware by managing design, requirements, and V&V in one place with Flow.

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Aerospace

Aalyria uses Flow to coordinate fast-moving aerospace networking programs with clear requirements and live verification.

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Aerospace

Cambridge Aerospace moves fast on complex flight systems by linking requirements, architecture, and test loops in Flow.

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Automotive

Harbinger structures EV truck development in Flow so hardware, software, and validation teams stay aligned as the platform scales.

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Propulsion

Firehawk drives propulsion development with Flow by linking requirements, architecture, and rapid test cycles in one place.

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Fusion

OpenStar manages fast-changing fusion architecture in Flow, branching design concepts, linking analyses, and keeping verification consistent as physics models evolve.

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Space

Space Machines Company designs, tests, and builds spacecraft in Flow, creating one live system of record across architecture, requirements, and hardware.

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Robotics

Hyphen builds their automated kitchen systems in Flow, keeping hardware, software, and operations aligned as they scale production.

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Space

Turion coordinates cross-disciplinary satellite design in Flow, tying mission requirements, subsystem interfaces, and test loops into a single source of truth.

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Propulsion

Phase Four uses Flow to manage evolving requirements, architecture, and test data for its plasma thrusters, giving engineering full visibility and control across rapid iterations.

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Fission

Antares uses Flow to structure the design, verification, and configuration of its transportable microreactors, helping cross-discipline teams collaborate as they scale into production.

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Manufacturing

Reditus runs requirements, interfaces, and test cycles for their return-capsule systems in Flow, keeping engineering aligned as they scale microgravity manufacturing missions.

Flow is the requirements management tool of our dreams
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Flow is the requirements management tool of our dreams. It reflects how we work—fast, iterative, and focused on giving everyone a common, integrated view of our system.

Getting to CI/CD for systems is the dream. Flow is what finally got us there. It’s not just another tool, it’s the backbone of how we build now.

We’ve had new hires tell us, unprompted, ‘this is the best requirements tool I’ve ever used’. That says it all.

Ryan McCullough
Ryan McCullough
System Architect
There’s nothing on the market that compares
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We needed a tool that could keep up with the pace of our organization, adapt to the increasing complexity of our products, and remain easy to manage without full time dedicated resources. Flow has delivered.

Unlike many tools that disrupt workflows or create bottlenecks, Flow integrates successfully with how modern engineering teams operate. It’s fast, flexible, and scales with ease.

In my experience, there’s nothing on the market that compares.

Joe Barton
Joe Barton
Technical Program Manager
I have not found anything comparable to Flow in giving us flexibility without compromising functionality
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Before Flow, this meant juggling spreadsheets, duplicate docs, and months of rework. Now it just works. I have not found anything comparable to Flow in giving us flexibility without compromising functionality.

With Flow, all our requirements, design targets, and simulation data actually live in one place. That might not sound revolutionary—but if you’ve ever tried to do this in hardware, you know how painful it actually is.

Rajat
Rajat Kulshrestha
CEO & Co-Founder, Space Machines Company
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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.

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Providing new-age engineering companies with a requirements tool that is built specifically for their needs and allows them to focus on engineering ground breaking products.