Announcing Hyperledger Besu 1.5: Available Now

The latest release of Hyperledger Besu is now available for download. The 1.5 version offers better performance and improved enterprise functionality.

In February, Hyperledger Besu 1.4 was released. Since then, we’ve been concentrating on continuing to bring Hyperledger Besu users the best experience among enterprise blockchain clients. Today, we’re announcing the release of Hyperledger Besu 1.5, which brings with it significant improvements to performance, usability, and privacy.

Hyperledger Besu 1.5 comes with primary upgrades that focus on enterprise requirements.



The most recent set of privacy enhancements include:

  • Ability to add and remove members from privacy groups.
  • Filters and subscriptions for private contracts.
  • Web3j and web3js support for private transactions and filters.

Read more about privacy enhancements in Besu 1.5.


  • Added native encryption libraries to provide optimization optionality
  • EVM execution improvements
  • Improved logs querying performance 
  • Improved transactions per second (TPS) performance by 33%

Look for more details on the improvements in an upcoming blog post.

Parity Tracing APIs

In the Hyperledger Besu 1.4 upgrade, we introduced new tracing APIs as early access features. Since then, we’ve ensured they worked smoothly across every edge case we could find and are now ready to suggest using them by default.

“Hands-on with Hyperledger Besu” is a guided introduction to Besu, hosted by some of the people who build, maintain, train, and work with the Ethereum client. The program is a four-week, detailed introduction to building with the client. Sign up and start learning about Besu today.


The following features are still under active development, may not be documented and have unstable APIs. Nevertheless, because community feedback is valuable to their development, we want to share them as “early access” features. All feedback and questions are welcomed in our contributor chat

EIP-1559 Support
Hyperledger Besu has been one of the clients leading the implementation of EIP-1559, a major upgrade to Ethereum’s transaction fee market. The upgrade will allow better transaction fee estimation and faster transaction inclusion in periods of high demand on the network.  

Ephemeral Testnet YOLO
In preparation for the next network upgrade, Berlin, an ephemeral testnet called YOLO was launched with two new EIPs enabled: EIP-2315, which adds subroutines to the EVM, and EIP-2537, which introduces a new precompile for the BLS12-381 curve.

While the network is currently down (its status can be seen at Hyperledger Besu is YOLO-compatible. 

Download the latest version of Hyperledger Besu here.

Interested in learning more or curious on how to get started with Hyperledger Besu? Check out the Besu docs, view the tutorials, visit the wiki, or take a look at some open issues in GitHub

Those looking to interact one on one with Besu developers and contributors can join the conversation on Rocketchat at #besu, or join our regular contributor calls.

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