Coconut Open Source
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Coconut Open Source Software Projects

“To help even one more person encounter Bitcoin the right way.”

Self-custody you can verify.

Coconut builds open Bitcoin self-custody tools that families can use with confidence today and pass on for generations.

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01

Our philosophy

Simple enough for every family. Durable enough for generations.

Coconut began with a personal question: could we confidently recommend Bitcoin self-custody to our own parents and children? Our answer is to help people navigate Bitcoin's complexity with understanding—not hide it behind another trusted intermediary.

01

Confidence through understanding

People should not need to become experts, but they should be helped to understand the choices they make as they use Bitcoin.

02

Open standards over lock-in

PSBTs, descriptors, QR communication, and hardware wallet interoperability preserve choice across tools.

03

Designed for the long term

Self-custody should support not only secure use today, but recovery, continuity, and an eventual handoff to the next generation.

02

The projects

Open tools for verifiable self-custody.

01Bitcoin library

coconut_lib

A Dart library for building mobile, air-gapped Bitcoin wallets and signers.

DartMIT
View repository
02Watch-only wallet

coconut_wallet

A watch-only Bitcoin wallet that syncs balances, creates transactions, and broadcasts signed transactions.

FlutterMIT/X11
View repository
03Offline signer

coconut_vault

An offline Bitcoin signer for managing keys and signing transactions on a network-disconnected device.

FlutterMIT/X11
View repository
04UI components

coconut_design_system

A reusable Flutter UI component library for building consistent Coconut application experiences.

FlutterMIT
View repository

03

How it fits together

Separate what must stay offline. Share what should stay consistent.

coconut_lib provides the shared Bitcoin foundation. coconut_vault protects keys and signs offline, while coconut_wallet coordinates and broadcasts online. Open standards connect this experience to the wider Bitcoin ecosystem.

Built on open Bitcoin standards

  • PSBT
  • Descriptors
  • QR communication
  • Hardware wallets

04

Proof of work

Public work, verifiable at the source.

Coconut has been developed in public since July 2024. This dated snapshot links directly to the commit histories, releases, and source records behind the project.

4Public repositories
6,340Public commits
42GitHub releases
2024.07Developed in public since
RepositoryCommitsReleasesPublic sinceSource
coconut_lib363182024-07-31Inspect
coconut_wallet3,515192024-07-31Inspect
coconut_vault2,15552024-07-31Inspect
coconut_design_system307—2025-02-03Inspect

Last verified: August 10, 2026. Commit and release totals show the extent of public activity, not a ranking of quality or impact.

Selected milestones

Public foundations

Published coconut_lib, coconut_wallet, and coconut_vault as public repositories.

Shared interface foundation

Published coconut_design_system for reusable Flutter components across Coconut applications.

Vault v2.1.0

Published the latest tagged release of the offline signer.

Wallet v0.12.3

Published the latest tagged release of the watch-only wallet.

Library v1.1.0

Published the latest tagged release of the shared Dart Bitcoin library.

Review source evidence

05

Contributors

Built by people who chose to work in the open.

Every account listed here has contributed commits to at least one Coconut repository. Names and avatars come from public GitHub profiles; contribution counts are intentionally omitted.

ella@ella-noncelab

Contributed tolib / wallet / vault / design

doey@doey-noncelab

Contributed tolib / wallet / vault / design

NonceLab Inc.@noncelab

Contributed tolib / wallet / vault / design

louis@louis-noncelab

Contributed tolib / wallet / vault

pio@pio-noncelab

Contributed towallet / vault / design

roy@roy-noncelab

Contributed towallet / vault / design

luke@luke-noncelab

Contributed towallet / vault / design

jay@jay-noncelab

Contributed towallet / vault / design

doey@doey-default

Contributed towallet / vault / design

Jayhk@jhk-im

Contributed towallet / vault

Roy Lee@asheswook

Contributed towallet

Hakkadaikon@Hakkadaikon

Contributed towallet

JM@4xvgal

Contributed towallet

tiger@tiger-noncelab

Contributed towallet

Jacksper13@Jacksper13

Contributed towallet

Yumin Kim@Yumin2019

Contributed tovault

06

Licenses & permissions

Open code, clearly stated rights.

Subject to each project's license terms, you may use, copy, modify, distribute, sublicense, and commercially use the code. Copyright and permission notices must be retained.

  • 01Use
  • 02Copy
  • 03Modify
  • 04Distribute
  • 05Sublicense
  • 06Sell
coconut_libMIT coconut_walletMIT/X11 coconut_vaultMIT/X11 coconut_design_systemMIT

Software is provided “as is,” without warranty. Software licenses do not grant rights to Coconut or NonceLab trademarks. The license text in each repository is authoritative.

07 / Contribute

Inspect it. Question it. Improve it with us.

Read the code, open an issue for something you find, or propose an improvement. Review each repository's contribution guide and responsible disclosure policy before contributing.

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