Sift Raises $42 Million Series B to Scale AI Infrastructure for Mission-Critical Machines

New updates have been reported about Sift.

Sift has secured a $42 million Series B round led by StepStone, with participation from GV, Riot Ventures, Fika Ventures, and CIV, bringing total funding to $67 million and positioning the company as a core data infrastructure provider for AI-controlled hardware fleets. The capital will be used primarily to expand Sift’s engineering organization and deepen its platform, which converts raw, high-volume sensor streams from machines in sectors such as space, defense, manufacturing, and autonomy into structured, queryable data usable by both engineers and AI systems.

Founded by former SpaceX engineers Karthik Gollapudi and Austin Spiegel, Sift targets the infrastructure gap between rapidly advancing AI capabilities and the fragmented, spreadsheet-driven data practices that still dominate hardware operations, especially as companies shift from one-off prototypes to constellations and fleets. Already used as a system of record by customers including ULA, Astranis, K2 Space, Parallel Systems, and undisclosed defense programs, Sift’s observability layer supports anomaly detection, design validation, and fleet-wide monitoring, and the company plans to nearly double its 70-person team, relocate to a larger Marina Del Rey headquarters, and broaden support for organizations running large-scale, AI-driven hardware over the coming years.