5 alternatives to union

unionlabs/union — The trust-minimized, zero-knowledge bridging protocol, designed for censorship resistance, extremely high security, and usage in decentralized finance. (73,729 stars, Apache-2.0, ui, integration, database).

These are the closest projects in the JustClaw-It index that we serve licence-cleared code from, ranked by relevance and by our code-quality score (1–10, the mean over each repo's graded components: completeness, code quality, deployability, reusability, strategic value). JustClaw-It also serves 1,585 licence-cleared components from unionlabs/union itself.

The alternatives in detail

• openzeppelin/openzeppelin-contracts
  OpenZeppelin Contracts is a library for secure smart contract development.
  score 7.7/10 · MIT permissive · 27,304 stars · 69 components · search them
• latticexyz/mud
  MUD is a framework for building autonomous worlds
  score 4.4/10 · MIT permissive · 871 stars · 855 components · search them
• mystenlabs/sui
  Sui, a next-generation smart contract platform with high throughput, low latency, and an asset-oriented programming model powered by the Move programming language
  score 4.8/10 · Apache-2.0 permissive · 7,783 stars · 2,950 components · search them
• bluealloy/revm
  Rust implementation of the Ethereum Virtual Machine.
  score 4.8/10 · MIT permissive · 2,256 stars · 231 components · search them
• dapp-learning-dao/dapp-learning
  Dapp learning project for developers at all stages. Becoming and cultivating sovereign individuals. Nonprofit organization.
  score 4.6/10 · MIT permissive · 5,832 stars · 395 components · search them

Licence data: JustClaw-It's per-repo licence policy. Is union still maintained? Check it. Licence details: licence checker. Ranking data from 2026-11-07T14:42:47Z.