Hiero
Hiero
Open Source Distributed Ledger Technology
What is Hiero?
Hiero, a
Linux Foundation Decentralized Trust
project, is an open-source, vendor-neutral distributed ledger technology. Hiero is used to build the
Hedera
public ledger.
Hiero is
fair
Public forums should be equally accessible. No one should manipulate your transactions to their advantage. Hashgraph is leaderless - toward a fairer world.
Hiero is
fast
Do not sacrifice performance for fairness or security. As businesses and networks expand rapidly, waiting for transactions to finalize no longer meets your needs. The hashgraph algorithm is fast.
Hiero is
secure
The hashgraph algorithm is the gold standard - asynchronous Byzantine Fault Tolerant (ABFT). Your transactions are protected with the highest security.
Hiero is
decentralized
No single entity should control your future. Power is shared among participants with equal access, securing the network and your data. You can participate in its development and use. This network belongs to the world and the future.
Hiero is
leaderless
Leader-based consensus is unfair and either slow or vulnerable to attacks. We believe in a fully leaderless protocol where every node participates equally. Our protocol is resistant to denial-of-service and prevents centralization.
Hiero is
open
Hiero's vibrant community builds a fairer, more efficient, and secure world. As part of the Linux Foundation Decentralized Trust initiative, it pioneers open governance and collaboration.
Jump to Open Issues
Find issues that match your skill level and start contributing to the Hiero ecosystem today.
Good First Issue
Ideal for first-time contributors new to the project.
Beginner
Straightforward tasks that need light domain knowledge.
Intermediate
Moderately complex issues for developers gaining experience.
Advanced
Challenging issues requiring deep technical expertise.
Join our Hiero Community Calls
Join our open meetings to collaborate with the team.
Register here
or view schedules on the
LFX Calendar
TSC
The Technical Steering Committee (TSC) meeting for project governance, roadmap planning, and key technical decisions.
Monthly Maintainers
Regular meeting for maintainers across all Hiero projects to coordinate, share updates, and discuss best practices.
Community Call
Open community meeting for general discussions, updates, and Q&A sessions with the Hiero community and TSC members.
SDK
General SDK working group for cross-SDK discussions, standards, and coordination across all Hiero SDK implementations.
Solo
Discussions and updates about Solo, an opinionated CLI tool to deploy and manage standalone test networks.
Python SDK
Focused discussions on the Hiero Python SDK development, including new features, issues, and contributions.
Hiero/Hedera Identity
Working group focused on identity-related projects, DID SDK development, and identity standards implementation.
Hiero Marketing
Marketing and community outreach discussions, including events, communications, and ecosystem growth strategies.
Docs
Documentation working group meetings to improve and maintain Hiero project documentation.
View all community calls →
Jump to our Hiero Repositories
Explore some of our most active and widely used Hiero repositories.
These projects form the core of the Hiero ecosystem.
390
390
stars
hiero-consensus-node
Crypto, token, consensus, file, and smart contract services for a Hiero based network.
320
320
stars
hiero-sdk-js
JavaScript/TypeScript SDK for interacting with a Hiero network.
266
266
stars
hiero-local-node
Run your own local Hiero based network for development purposes.
256
256
stars
hiero-sdk-java
Java SDK for Hiero distributed ledger technology.
183
183
stars
hiero-mirror-node
Archives data from consensus nodes and serves it via an API.
176
176
stars
hiero-improvement-proposals
Hiero Improvement Proposal repository for community-driven enhancements.
123
123
stars
hiero-sdk-go
Go SDK for Hiero distributed ledger technology.
87
87
stars
hiero-json-rpc-relay
Implementation of Ethereum JSON-RPC APIs for Hedera.
59
59
stars
hiero-sdk-rust
The Hiero Rust SDK for building on Hiero networks.
View all repositories →
“Hedera's participation in Linux Foundation's Decentralized Trust will undoubtedly accelerate development, enhance security, and foster unprecedented collaboration within the Hedera ecosystem, positioning it at the forefront of blockchain innovation. As the leading wallet on the network, HashPack is committed to playing an active role in this new open source structure, and we look forward to
contributing our expertise
to help shape the future of Hedera and the broader decentralized technology landscape.”
May Chan, CEO,
HashPack
“By contributing its codebase to the Linux Foundation's Decentralized Trust, Hedera is demonstrating the ultimate commitment to open development. As a leading
data infrastructure provider
in the ecosystem, Hgraph is actively dedicated to supporting the Hiero project as it transforms the open source DLT space and empowers the Hedera developer community.”
Tyler McDonald, CEO,
Hgraph
“The HBAR Foundry community is excited to see the contribution of the Hedera software to the Linux Foundation Decentralized Trust project. We're delighted to see Hedera's commitment to growing an independently governed and transparent community with more resources and opportunities to engage and grow the ecosystem.”
The HBAR Foundry
, A Community Of Expert Hedera Builders
“Hedera's contribution of its codebase to the Linux Foundation's Decentralized Trust initiative is great news for SentX.io. By open-sourcing the Hashgraph technology, Hedera is reinforcing its commitment to innovation and decentralization. We expect this move to boost developer engagement, speed up the adoption of decentralized applications, and attract more retail users, driving growth across the ecosystem.”
Sam Jimenez & Patrícia Carapinha, Founders,
SentX.io
“Transferring ownership of Hedera's codebase to the Linux Foundation Decentralized Trust project is a testament to the power of open collaboration and meritocracy. This landmark initiative will empower developers, entrepreneurs, and enterprises to actively participate in shaping the future of Hedera. We are thrilled to be part of this vibrant ecosystem and look forward to contributing to its growth and success.”
Ivan Saiz, CTO,
ioBuilders
“Hedera's contribution of its codebase to the Linux Foundation's Decentralized Trust entirely reshapes decentralized governance. At Calaxy, we view this as more than an infrastructure change - it's a move that drives real-world innovation. Developers now have greater autonomy and access to tools to build more inclusive, user-driven applications. We're excited to see how this enables devs to push the boundaries of creator-focused economies and further integrate blockchain into our everyday social experiences and relationships.”
Solo Ceesay, CEO & Co-founder,
Calaxy
“Hedera's decision to open-source its codebase under the Linux Foundation Decentralized Trust is a monumental leap forward for the entire blockchain industry. This bold move not only underscores Hedera's commitment to decentralization and transparency but also paves the way for unprecedented community-driven innovation. We are excited to collaborate with the growing ecosystem to build a future where the possibilities are limitless.”
Rajiv Sohal, CTO,
Diamond Standard
“This contribution represents a historic moment in the evolution of decentralized networks and is setting a precedent for transparency and collaboration in the blockchain industry. By contributing our codebase to LF Decentralized Trust, as project Hiero, we are reaffirming our commitment to open governance and collaboration. LF Decentralized Trust's mission to advance decentralized systems aligns perfectly with our own goals. We look forward to providing developers with unmatched access to tools and resources, creating an environment where decentralized applications can truly thrive.”
Charles Adkins, President,
Hedera
“By contributing Hiero to the Linux Foundation, an organization with a long history of supporting open source and open innovation, Hedera demonstrates to Council Members, ecosystem partners, grantees, and the builder community that it is committed to growing the capabilities of its network through transparency and meritocracy.”
Dr. Leemon Baird, Inventor, Co-founder, & Chief Scientist,
Hashgraph