Revel

Revel builds software that spans the entire lifecycle of hardware systems, from a first prototype on a lab bench to full production. RevelTest lets engineers design and run hardware tests quickly — quick-turn benchtop setups, iterative R&D cycles, and prototype-to-production testing — while RevelC2 is a command-and-control platform built for large-scale industrial systems in aerospace, energy, and defense, offering facility-wide control and always-on support for critical operations. Under the hood it includes automated system discovery, real-time telemetry visualization, and a proprietary hardware control language called RevelCode. Its customer base reads like a who's-who of the new space and propulsion industry — Impulse Space, Gravitics, Astro Mechanica, and Orbital Operations all use it, with Impulse Space specifically crediting Revel with a 4x increase in test frequency and junior engineers being able to independently run complex engine tests that previously needed senior oversight. The company has raised through a Seed, a $30M Series A (April 2025), and a $150M Series B (February 2026) led by Index Ventures, with Thrive Capital, Redpoint Ventures, Felicis Ventures, and Abstract Ventures also participating.