The archive · Space, Robots, Defence · Strategic decision · 2021–2026
Gensyn bets crypto-verified compute beats GPU clouds: $43M a16z Series A, $1B token sale
UK protocol renting idle GPUs for AI training with cryptographic proof-of-learning; a16z-backed, 165k+ testnet users.
Gensyn
What the business is
Decentralized machine-learning compute protocol: a blockchain-based market that connects AI model creators with owners of idle data-center and edge GPUs, settled in the $AI token.
Starting capital：$6.5M seed led by Eden Block (March 2022); $43M Series A led by a16z crypto (June 2023); a later a16z-led round priced at a $1B fully-diluted valuation cap (fall 2025).
How it started
AI researchers Ben Fielding and Harry Grieve founded Gensyn in 2021 in the UK, betting that the coming AI boom would make compute scarce and that the world's underused GPUs could fill the gap. Eden Block led the $6.5M seed in March 2022.
What happened
In June 2023, a16z crypto led a $43M Series A with CoinFund, Eden Block, Protocol Labs, Maven11 and others. Testnet traction then compounded: 140,000 users by October 2025, rising to 165,000+ users and 2,000,000+ trained models by December 2025. A further a16z-led round was priced at a $1B FDV cap, and on December 15, 2025 the Foundation opened the $AI token public sale on Sonar at the same cap, ahead of Mainnet.
How it ended up
Still building toward Mainnet as of late 2025: the token sale is the final public step before the network operates with real value, and Gensyn also launched Delphi, an open marketplace for machine-intelligence evaluation.
Background
Gensyn is a UK-based protocol that turns underused GPUs into a global market for AI training compute. Model creators publish training jobs; owners of idle data-center and edge hardware run them; and a blockchain layer settles payments and stakes. The bet is that this open market can undercut AWS, Azure and Google Cloud on price and supply.
The technical foundation is proof-of-learning — cryptography that lets a buyer verify a training run really happened on rented hardware. Without it, a decentralized compute market cannot work, because no buyer would trust a stranger's claim that they trained a model. Gensyn's founders, Ben Fielding and Harry Grieve, started the company in 2021; Eden Block led a $6.5M seed in March 2022.
a16z crypto led a $43M Series A in June 2023, and the testnet then grew from roughly 140,000 users in October 2025 to 165,000+ users, 2,000,000+ trained models and 90,000,000+ transactions by December 2025. A later a16z-led round was priced at a $1B fully-diluted valuation cap, and the $AI token public sale opened on December 15, 2025 at that cap, ahead of Mainnet launch.
What has to be true
- Proof-of-learning addresses the one problem that makes decentralized compute markets impossible: verifying that rented hardware actually did the work.
- The ChatGPT-era GPU crunch gave Gensyn a supply-side argument — idle GPUs exist everywhere, and a market can unlock them cheaper than building new clouds.
- a16z's thesis that Gensyn could increase usable ML compute 10–100x made the $43M Series A and the later $1B-cap round possible.
- The testnet's growth from 140k to 165k+ users in two months showed real developer demand, not just fundraising momentum.
What can be applied
A marketplace that sells trust needs verification as the product: Gensyn's proof-of-learning let strangers rent each other's GPUs without an intermediary — the protocol becomes the platform.
Aftermath
As of December 2025, Gensyn is pre-Mainnet: the testnet has 165,000+ users and 2,000,000+ trained models, and the $AI token public sale on Sonar (valuation floor $1M FDV, cap $1B FDV, 3% of supply) is designed to seed a fair distribution before the network moves to real value. The company is positioning itself not as another cloud, but as the settlement layer of a market-driven AI compute economy.
Sources
- Gensyn's decentralized AI-computing network project raises $43 million
- Gensyn 联合创始人 Harry Grieve：加密基础设施将破解机器智能面临的四大挑战
- Gensyn Launches $AI Token Sale on Sonar
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