The wait is over—Testnet 9, the final Union testnet before mainnet, is live and ready for public testing.
Go to app.union.build.
Connect your wallets (Cosmos and EVM wallets supported).
Start transferring assets.
Testnet 9 is a major opportunity for Union supporters to contribute to the Union network. By battle testing the network, the community will help ensure that Union is ready for showtime. It’s time to take advantage of the dashboard and test—send a lot of transfers, send all kinds of assets, and generally do whatever you can to break the testnet. This is the time.
Here’s everything you need to know about Testnet 9 and the Union dashboard.
Testnet 9 – New Features
Those who follow @union_build will have read the sneak peek of What’s Coming in Testnet 9. Here’s the tl;dr:
State Lenses: A fundamental improvement on IBC’s Packet Forward Middleware (PFM) that renders the costly re-execution of transfers unnecessary. More from Union R&D.
Intents: Complete transfers with faster-than-finality speeds, while still leveraging IBC’s best-in-class security. More from Union R&D.
CosmWasm IBC Stack: Cosmos chains only need CosmWasm to adopt Union.
EVM Gas Optimizations: Lowered gas costs by 30%.
MPC-powered ZKP Security: Testnet 9 is secured by Trusted Setup Ceremony contributions. The ceremony is ongoing... but for how much longer?
Move Foundations: Move chains like Movement are coming to Testnet 9.
Improved Galois Proving Speeds: From ~8 seconds to ~6 seconds.
Component Upgrades: CosmWasm 2.0, CosmosSDK v0.52, and CometBLS upgraded to CometBFT 1.0. Union always uses the most up-to-date tech.
These improvements mean that Testnet 9 is the fully mainnet-ready tech stack of Union. Now all that remains is to test it at scale.
Go to app.union.build, connect your wallets, and start transferring assets. If you experience a bug or have feedback, join the Union Discord, go to 🎟️ | support-tickets under the HELP section, and create a ticket. Make sure to check the 📢 | announcements channel first for updates.
Key actions you can take on the testnet include:
Get testnet tokens from the Union Faucet.
Transfer tokens to testnets for Ethereum (Sepolia and Holesky), Union, Stargaze, Osmosis, and Babylon (more on the way).
Check the Explorer to view transactions and statistics.
Connect to the Dashboard and complete missions, unlock achievements, and earn rewards. Testnet 9 onchain achievements are now available.
Test the Network, Build the Union
At the launch of the previous public testnet, Union co-founder Karel Kubat had this to say:
We are rolling out new features rapidly in the UI, including new networks, faster proving times, and support for L2s and L3s. We aim to eliminate the barriers between otherwise isolated blockchain ecosystems, as well as foster innovation through permissionless composability, which is a key requirement for scaling a modular, multi-chain world. We ask ourselves, how do we enable the next ten thousand builders to choose modular and integrated solutions.
What was true then is even more true now. Union is the hyper-efficient ZK infrastructure layer that solves the limitations faced by existing interoperability solutions. Rather than relying on trusted third parties, Union validates the entire chain consensus in ZK. This results in faster and more secure bridging for projects across thousands of chains.
This is how the Union community builds a network that will span not just one chain, not a dozen, not even hundreds, but thousands of chains. The future is inevitably modular and multi-chain. The future is Union.
That’s why it’s important to rigorously test the network. Overload it. Break things. Try every conceivable function. Mainnet is almost here, so the time to battle-test the network is now.
Share the announcement.
Go to the Union App.
Connect to the Dashboard.
Test the network, unlock achievements, earn rewards, and help build the future of interoperability.
Go full Goblin Mode. Join the Union.
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