Airtrain.ai
No-code AI data platform for LLM fine-tuning, dataset curation, auto-clustering, AI labeling, and batch evaluation — acquired by Weights & Biases in February 2024.
Airtrain.ai
No-code AI data platform for LLM fine-tuning, dataset curation, auto-clustering, AI labeling, and batch evaluation — acquired by Weights & Biases in February 2024.
Executive Summary
Airtrain.ai was a YC S22 no-code LLM data platform — built by credible ML veterans from Cruise, Instacart, and Google — that was acquired by Weights & Biases in February 2024, roughly 18 months after raising a $3.2M seed round. The acquisition validates the team and technology, but it also means Airtrain no longer exists as an independent investable entity; the founder is now an employee at W&B, which itself was acquired by CoreWeave in March 2025. Traction claims are largely unverified marketing copy, the competitive moat was narrow and quickly surrounded by well-capitalized incumbents, and the company raised only one disclosed round in a market that saw a historic generative AI funding boom. Any investor evaluating this profile should first clarify what, if anything, is actually available for investment — because the original company has been absorbed.
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