what's Teku?
Teku is an open-source Ethereum consensus client written in Java, developed by ConsenSys. It provides a full implementation of a beacon node and validator client, enabling participation in Ethereum's proof-of-stake consensus mechanism. Designed with institutional staking in mind, Teku emphasizes security, compliance, and performance, supporting features like slashing protection and weak subjectivity synchronization. Users can run Teku as a standalone client or alongside execution clients like Geth or Besu via the Ethereum execution layer API. It supports mainnet and testnets, with regular updates for forks and improvements in efficiency, such as optimized attestation pooling for better block production. Teku integrates with tools like Docker for easy deployment and is licensed under Apache 2.0, fostering community contributions through its GitHub repository.
Teku released version 0.1.16, ready for the Gnosis Chain hard fork on December 22.
Links
x.com/tekuethReleased version 25.12 featuring RocksDB as the new default database and a data columns sidecar backfiller, with manual migration required for existing LevelDB databases to RocksDB.
Released version 0.1.16 that is ready for the Gnosis Chain hard fork scheduled for December 22, 2025.
Optional v25.11.1 update releases with new beacon peer count metrics, LibP2P RPC metrics, JDK 25 Docker build, and DasPreSampler bug fix.
Fusaka upgrade is coming soon and requires users to update their clients.
Version v25.11.0 releases as a REQUIRED MAINNET UPDATE for the upcoming Fulu consensus layer upgrade, adding Fulu fork configuration.
Version 25.10.0 releases as an optional Mainnet update but recommended for all Testnets.
Version 25.9.0 releases with new attestation pool and LUKSO configuration updates for Electra fork.
Optional v25.7.1 update releases with validator client fixes and increased builder registration gas limit.
Critical v25.4.1 update released with breaking changes, mandatory installation required before Electra hard fork.
New v25.4.0 release improves attestation queue and signature verification with post-Electra aggregation fixes.