San Francisco startup Flapping Airplanes is negotiating a massive funding round led by Index Ventures and Lux Capital to solve AI data scarcity.
Flapping Airplanes is currently in discussions to raise hundreds of millions of dollars at a $5 billion valuation. The San Francisco based startup is focused on a specific technical bottleneck: the massive data requirements of modern artificial intelligence.
Multiple sources familiar with the matter told Forbes that Index Ventures and Lux Capital are leading the round. Kleiner Perkins is also expected to participate in the capital raise.
Neither the startup nor the participating venture capital firms responded to requests for comment.
The technical core of the company involves developing training methods that require significantly less data than current industry standards. While today's frontier models rely on ingesting nearly the entire public internet to function, Flapping Airplanes aims to mimic the human ability to reason from much smaller datasets.
Founded in 2025 by brothers Ben Spector, 25, and Asher Spector, 26, along with Aidan Smith, the company is moving quickly. In January, the team secured a $180 million seed round. That initial injection included Sequoia Partner David Cahn, who has characterized the firm as a young person's AGI lab.
The funding round
This move places Flapping Airplanes within a specific cohort of high capital startups known as neolabs. These entities prioritize frontier research over immediate product launches or revenue generation. They function more like academic institutions with massive bankrolls than traditional software companies.
Other players are chasing similar goals. London based Ineffable Intelligence, founded by former Google DeepMind researcher David Silver, recently raised $1.1 billion. That firm is working toward models that learn through trial and error rather than relying on human generated data.
For investors, the bet is that the current trajectory of scaling laws will eventually hit a wall of data exhaustion. If the supply of high quality human text runs dry, the companies that master data efficiency will hold the keys to the next generation of artificial intelligence.
Industry context
The rise of these neolabs signals a shift in how the venture community views the AI stack. Instead of building applications on top of existing models, these firms are attempting to rewrite the underlying mechanics of how intelligence is synthesized.
This approach carries significant risk. Research heavy startups often face long timelines before any commercial utility is realized. However, the potential reward is the ability to bypass the astronomical costs associated with massive data scraping and storage.
If Flapping Airplanes succeeds, the barrier to entry for training capable models could drop, potentially decentralizing the power currently held by a few hyperscalers. Whether their specific methods can scale to the level of current industry leaders remains an unproven hypothesis.
FAQ
What is Flapping Airplanes trying to solve?
The company is researching ways to train artificial intelligence models using much less data than is currently required by large scale models.
Who is investing in Flapping Airplanes?
Index Ventures and Lux Capital are reportedly leading the new funding round, with participation from Kleiner Perkins.
How much is the startup worth?
Flapping Airplanes is currently in talks to reach a $5 billion valuation during this latest funding round.
