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Trajectory
Trajectory provides a platform for companies to perform post-training, evaluation, and deployment of AI models on production data.
Trajectory is a developer tools company, founded in 2025. It has raised $45 million in disclosed funding. Its latest round was a Series A of $45 million in November 2026.
Overview
Founded in 2025, Trajectory provides an AI post-training platform that enables organizations to refine and deploy custom models using their own production data [0, 1]. The system is designed to allow subject matter experts—rather than only AI researchers—to shape model behavior by defining specific evaluation criteria and success metrics [1]. Features include "Continual Grading," which automates judgment across datasets, and "Group Size 1," which facilitates model training on live production interactions to support ongoing improvement [0, 1]. The platform integrates into existing workflows with minimal code changes, aiming to replace complex, fragmented infrastructure for model management [0, 1]. It serves various enterprise clients, including Harvey, Rogo, Mercor, and NVIDIA [1]. In a Series A funding round, Trajectory raised $45 million to scale its operations [1]. The company's team, which includes former researchers from DeepMind, OpenAI, and Meta, focuses on enabling companies to build proprietary intelligence that updates based on operational performance [1].
machine-learningpost-trainingenterprise-aireinforcement-learningmodel-evaluationllmai-agents
Funding
Total disclosed: $45M across 1 round. Computed only from sourced rounds.
| Date | Company | Amount | Stage | Lead | Other investors | Sector | Sources |
|---|---|---|---|---|---|---|---|
| $45M | Series A | Sequoia Capital | Nvidia +2 | Developer Tools | 1 |
Investors
In the news
Questions and answers
What does Trajectory do?
Trajectory provides a platform for companies to perform post-training, evaluation, and deployment of AI models on production data.
How much has Trajectory raised?
Trajectory has raised $45 million in disclosed funding across 1 round tracked by OSH.
Who has invested in Trajectory?
Investors in Trajectory include Sequoia Capital, Nvidia, Bessemer Venture Partners, and Bain Capital Ventures.
When and where was Trajectory founded?
Trajectory was founded in 2025.
Timeline
Founded
Sources
- 1.Trajectory raises $45M to make AI model training accessible to nontechnical experts — TechCrunch AI, Nov 2, 2026
- 2.Trajectory · Official
- 3.Trajectory · Official