Starknet, an Ethereum ZK rollup network used for decentralized finance and gaming, is facing mainnet downtime in 2025 following previous outages.
Starknet, an Ethereum Layer 2 network that uses zero-knowledge (ZK) rollups, is experiencing one other mainnet disruption because the project begins in 2026.
In a post on At the time of writing, the network had been down for just over two hours.
Starknet is a ZK-Rollup based Layer 2 that batches transactions off-chain and sends cryptographic proof to Ethereum. The goal is to realize higher throughput and lower fees for smart contracts, decentralized finance and gaming applications while adopting Ethereum's base layer security.
The Starknet mainnet is down. Source: Voyager Online
The project has also promoted a Bitcoin DeFi or BTCFi arch and presented itself as an infrastructure for integrating Bitcoin-related financial applications into the Ethereum ecosystem. Despite the network disruption, the STRK token price remained stable on the time of writing.
The STRK token price remained stable. Source: CoinMarketCap
This isn’t the primary time that the Starknet mainnet has failed
The incident follows a series of outages in 2025 which have brought Starknet's reliability under greater scrutiny. In September, a serious upgrade called Grinta (v0.14.0) resulted in an prolonged mainnet outage that halted block production and required two chain reorganizations, restoring about an hour of activity and forcing users to resubmit affected transactions.
This episode followed an earlier multi-hour outage in 2025 that was linked to sequencer issues, with external trackers logging multiple incidents of slow or stopped block creation all year long.
A Starknet incident report from the September event said that the Grinta-related downtime lasted roughly nine hours and attributed the issues to quite a lot of issues, including outages at Ethereum RPC providers and bugs affecting sequencer behavior, leading the team to commit to architectural changes and expanded monitoring.
A Starknet representative told Cointelegraph that the team is working to resolve the brand new incident.
