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Modal Raises $750 Million at a $15.75 Billion Valuation Led by Accel

Modal Labs announced the closing of a $750 million Series D round led by Accel, bringing its valuation past $15.75 billion—more than triple its valuation in May.

October 18, 2026
Modal Raises $750 Million at a $15.75 Billion Valuation Led by Accel

Modal Labs announced the closing of a $750 million Series D funding round led by Accel with participation from Kleiner Perkins, raising its post-money valuation to $15.75 billion.

This valuation represents more than triple what the company was valued at in May 2026, according to the company's announcement.

Modal stated that its annual revenue has passed $1 billion, with about one-third of that figure generated by its "Sandbox" cloud container product.

The company plans to use a portion of the funding to develop reinforcement learning and post-training services—stages used by companies to optimize the performance of AI models after building them.

What do these terms mean?

Series D: An advanced funding stage that typically precedes an IPO, used for major expansion prior to an exit.

Post-Money Valuation: The company's value calculated after adding the new capital, rather than before.

Reinforcement Learning: Training a model through trial and reward to improve its decisions over time.

Post-Training: The model refinement stage following its core training, designed to customize its behavior and performance.

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