Stackup Bundler

Open-source ERC-4337 bundler written in Golang by Stackup.

Open-source

Visit website

This link will take you to a third-party site not owned or operated by Alchemy.

What is Stackup Bundler?

Stackup Bundler is a modular, high-performance, and fully compliant ERC-4337 bundler built in Go by the engineering team at Stackup, most notably Stackup's co-founder, Hazim (@hazim-j). The repository was archived in October 2024 and is now read-only. Developers can still self-host the open-source bundler from the archived codebase.

Sponsor gas and bundle user ops in your app or on your chain

Get your API key

Web3 dapps and developer tools related to Stackup Bundler

Discover blockchain applications that are frequently used with Stackup Bundler.

Alchemy Bundler

Account abstraction (ERC-4337) bundlers

Open-source ERC-4337 bundler written in Rust by Alchemy.

Sygnum Web3 Recovery

Wallet security tools

Sygnum Web3 Recovery provides a regulated wallet recovery solution for Safe accounts, making self-custody recovery reliable and user-friendly.

Fluvi Wallet

Smart contract wallets

Fluvi Wallet is a non-custodial smart contract wallet built on Account Abstraction with on-chain 2FA and seedless recovery.

Best Account abstraction (ERC-4337) bundlers

Discover more web3 applications and developer tools.

See all dapps

Developer resources from Alchemy

All new dashboard experience for faster debugging, monitoring, and building

Blog

Announcements

All new dashboard experience for faster debugging, monitoring, and building

Alchemy launches a new dashboard design to improve developer workflows.

Alchemy Smart Wallets support J.P. Morgan

Blog

Announcements

Alchemy Smart Wallets support J.P. Morgan

We're proud to announce J.P. Morgan's launch of its first USD deposit token proof of concept on a public blockchain, supported by Alchemy's enterprise-grade infrastructure and smart wallets.