Trajectory Raises $45M for AI Model Training Platform

Nov 3, 2026
Trajectory raised $45 million in a Series A round at a $300 million valuation. Its platform retrains open source AI models using feedback from specialized tasks.

Trajectory raised $45 million in a Series A round at a $300 million valuation, according to TechCrunch. The round was led by Sequoia Capital, with participation from NVIDIA, Bessemer Venture Partners and Bain Capital Ventures.

Trajectory connects open source AI models to business applications and collects feedback on their performance. It uses that feedback to retrain the models so they improve at specialized tasks over time, while subject matter experts define the desired results.

The company is making its post training platform publicly available. Harvey, Rogo, Decagon, Mercor and NVIDIA are among its customers. Trajectory was founded by three Stanford classmates with experience at Google DeepMind and Apple, and currently has 18 employees.

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