Key facts
- TrainLoop’s last known valuation is $7.1M (Feb 2025).
- It has raised $500K; the latest was Seed Round in Mar 2025.
- Notable investors include Y Combinator, Pioneer Fund, Olive Tree Capital, Moonfire, Marble Creek Ventures.
- Status: Privately Held (backing).
- ·The complete investor list — 5 names
- ·Watchlist + deal alerts for TrainLoop
- ·The full record, as it builds
Funding rounds
No funding rounds for TrainLoop are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
About TrainLoop
Developer of fine-tuned reasoning models designed to transform generic language models into domain-specific experts. The company uses reinforcement learning techniques, including dataset refinement through a lightweight software development kit, preference alignment via reward model training, and deployment through standard application programming interfaces, enabling developers to improve the accuracy and consistency of artificial intelligence applications by minimizing mistakes and avoiding unintended outputs.
- Sector
- Information Technology
- HQ
- San Francisco, CA, United States
- Founded
- 2025
- Employees
- 8
- Website
- trainloop.ai/
- Ownership
- Privately Held (backing)
TrainLoop doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in TrainLoop shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on TrainLoop in its N-PORT filings yet. We sweep new filings monthly.