Ethereum Launches Kintsugi Public Testnet Ahead of Move to Proof-of-Stake
The move opens access to the new environment to a wider audience; earlier testnets were available only to developers.

Ethereum opened the Kintsugi testnet to the public on Monday, Tim Beiko, a developer for the blockchain, announced in a post.
Testnets run atop and mimic the activity of the core blockchain, or mainnet, without affecting it. They allow developers and the community to test applications and features in a controlled setting.
Kintsugi, named for the Japanese art of mending broken pottery with gold, is one of the final public testnets before Ethereum 2.0. That’s a plan to convert the blockchain to a proof-of-stake mechanism – one that relies on validators locking up tokens to validate transactions and maintain the network – instead of its current proof-of-work consensus design. Earlier testnets were available only to developers.
“Although client development and UX [user experience] continue to be refined, we encourage the community to start using Kintsugi to familiarize themselves with Ethereum in a post-merge context,” Beiko said. “For application developers, as previously explained, not much will change. Tooling which only interacts with either the consensus or execution layer is also largely unaffected.”
Over the past few months, client teams have been working tirelessly to implement a new set of merge milestones. They are now live on a new testnet: Kintsugi 🍵!
— timbeiko.eth ☀️ (@TimBeiko) December 20, 2021
Here's how you can join the testnet and help with testing: https://t.co/ARDezguzXE 👀
Christmas came early🎄!
Dubbed a “longer-lived public testnet,” Kintsugi is where anyone can experiment with Ethereum in the exact manner the network would operate after the changeover. This could mean testing niche decentralized finance (DeFi) tools, which rely on smart contracts to provide financial services, to more technical usage of the network.
The move follows a nearly year-long process to shift to Eth 2.0. Four so-called devnets launched in the past year after the Phase 0 launch of the Beacon Chain. The Beacon Chain already stores billions of dollars worth of value, data from on-chain analytics tool Dune Analytics show. It exists separately from the current Ethereum network but will eventually be merged.
Kintsugi is expected to run until it reaches stability along with other testnets, following which a move to Eth 2.0 takes place. “Existing long-lived testnets will run through The Merge. Once these have upgraded and are stable, next up is Ethereum mainnet’s transition to proof of stake,” explained Beiko.
More For You
KuCoin Hits Record Market Share as 2025 Volumes Outpace Crypto Market

KuCoin captured a record share of centralised exchange volume in 2025, with more than $1.25tn traded as its volumes grew faster than the wider crypto market.
What to know:
- KuCoin recorded over $1.25 trillion in total trading volume in 2025, equivalent to an average of roughly $114 billion per month, marking its strongest year on record.
- This performance translated into an all-time high share of centralised exchange volume, as KuCoin’s activity expanded faster than aggregate CEX volumes, which slowed during periods of lower market volatility.
- Spot and derivatives volumes were evenly split, each exceeding $500 billion for the year, signalling broad-based usage rather than reliance on a single product line.
- Altcoins accounted for the majority of trading activity, reinforcing KuCoin’s role as a primary liquidity venue beyond BTC and ETH at a time when majors saw more muted turnover.
- Even as overall crypto volumes softened mid-year, KuCoin maintained elevated baseline activity, indicating structurally higher user engagement rather than short-lived volume spikes.
More For You
Ethereum Foundation makes post quantum security a top priority as new team forms

EF researcher Justin Drake says a new post-quantum team will drive wallet safety upgrades, research prizes and test networks as quantum timelines shorten.
What to know:
- The Ethereum Foundation has elevated post-quantum security to a top strategic priority, forming a dedicated Post Quantum team led by Thomas Coratger with support from leanVM cryptographer Emile.
- Researcher Justin Drake said Ethereum is shifting from background research to active engineering, including biweekly developer sessions on post-quantum transactions and multi-client post-quantum consensus test networks.
- The foundation is backing new cryptography with funding and outreach, launching two $1 million prizes, planning post-quantum community events and education, and stressing that blockchains must prepare early for quantum threats despite their long-term nature.











