Revel has raised $150 million in Series B funding to expand its unified hardware test and control platform across aerospace, defense, robotics, and industrial markets. The round was led by Index Ventures, with participation from Redpoint Ventures and returning investors Thrive Capital, Felicis, and Abstract Ventures. Dylan Field also joined as an angel investor.
Revel is tackling a quiet but critical bottleneck in modern hardware: the software used to test and control it. Rockets, propulsion systems, advanced robotics, and nuclear infrastructure may be cutting edge, but the control software behind them is often decades old. Many tools were built before collaborative workflows, real-time observability, and deterministic execution became standard in modern software engineering.
Revel’s platform replaces that patchwork with a unified system. Engineers can visually configure hardware setups, stream and analyze live telemetry, and issue commands safely in real time. At the core is RevelCode, a Python-inspired programming language designed for deterministic execution, meaning the same inputs reliably produce the same outputs, an essential requirement in high-consequence environments like spaceflight or energy systems.
The goal is not just convenience. Deterministic control and built-in debuggability reduce the risk of subtle software errors cascading into hardware failures. By standardizing how teams test and command physical systems from prototype through production, Revel aims to make hardware development faster, safer, and more reproducible.
