Meet Grin

the private & scalable
mimblewimble blockchain

What's Mimblewimble?

Currently Live: Testnet 4 Grin is under development. Launch planned for early 2019.

What's Grin?

Grin builds electronic transactions for all, without censorship or restrictions.

Grin empowers anyone to transact or save modern money without the fear of external control or oppression. Grin is designed for the decades to come, not just tomorrow. Grin wants be usable by everyone, regardless of borders, culture, skills or access.


Grin has no amounts and no addresses. Transactions are additionally obscured. To hide where a newly created transaction comes from, it gets relayed privately (a "random walk") among peers before it is publicly announced.


MimbleWimble leverages cryptography to allow most of the blockchain data to be removed. In particular, nearly all past transaction data is pruned.


Grin is developed openly, by open source developers based in different countries. It's not controlled by any company, foundation or individual. The coin distribution is designed to be as fair (but not gratis) as is known to be possible.


Grin is launched fairly, free of ICO, pre-mine or founder’s reward. We rely on donations to keep working on the project. Support the movement by purchasing some swag or making a donation.

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If you’re an individual, company or institution excited about the potential of Grin or MimbleWimble, we humbly ask if you’d consider making a financial contribution to the project’s development. We’re experimenting with a 100% community-driven funding model.

Private Funding Contributors


Chris McCann

Jack Misteli


Jameson Lopp

Max Tannahill

Michalis Kargakis

Redouan Ahaloui

Roy Blankman

Niels de Ruiter

Anonymous Funding Contributors

And all our great anonymous supporters! We’re not forgetting your contribution, and are working to protect that choice!