---
title: "Snorkel AI Raises $350M at $3.5B for Frontier-Model Data"
description: "Snorkel AI raised $350 million at a $3.5 billion valuation as model developers spend more on expert-built training tasks, environments and evaluations."
date: 2026-09-25T00:00:00.000Z
source: https://venturecapitaltracker.com/2026-snorkel-ai-350m-3-5b-frontier-data
---

# Snorkel AI Raises $350M at $3.5B for Frontier-Model Data

> Snorkel AI raised $350 million at a $3.5 billion valuation as model developers spend more on expert-built training tasks, environments and evaluations.

**Snorkel AI raised $350 million at a $3.5 billion valuation** on September 22, 2026. **Insight Partners** and **S32** co-led the financing, with significant participation from existing investor **Addition**.

New investors included March Capital, Blumberg Capital, Allegis Capital, Frontline, Standard and Third Point Ventures. Greylock, Lightspeed, GV, Factory, Prosperity7, Walden Catalyst and Wells Fargo also returned.

## Deal terms

| Field | Detail |
| --- | --- |
| Company | [Snorkel AI](/startup/snorkel-ai) |
| Financing | **$350M growth round** |
| Valuation | **$3.5B** |
| Co-leads | Insight Partners; S32 |
| Other investors | Addition; March; Blumberg; Allegis; Frontline; Standard; Third Point; Greylock; Lightspeed; GV and others |
| Status | Company announced |

## Why this financing matters

The round shows that the data market is moving beyond inexpensive labeling. Frontier systems need domain experts to design long-running tasks, executable environments, evaluation rubrics and reinforcement-learning feedback. Snorkel calls this shift “Data 2.0.”

That is a more defensible business than commodity annotation if the company can own workflow software, quality controls and customer relationships. It is also labor-intensive: the more specialized the work becomes, the harder it may be to scale without compressing margins.

## What investors still do not know

Snorkel did not disclose revenue, growth rate, customer concentration, primary-versus-secondary mix or the percentage of the company sold. Its claims about research output and market position are company-provided.

## Bottom line

This is a confirmed **$350 million round at $3.5 billion**. The editorial signal is the competition to supply expert data and evaluation infrastructure to frontier AI labs—not simply another large AI valuation.

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** September 25, 2026

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.