Solana has begun rolling out its Alpenglow consensus upgrade on testnet, marking the first public deployment replacing TowerBFT and paving the way toward devnet and mainnet-beta.

The testnet rollout marks Solana’s expanded public testing after months on smaller networks to verify compatibility with broader validator infrastructure.

This testnet phase is a critical step in validating Alpenglow’s reliability before mainnet-beta, where it will support Solana’s growing trading and tokenized-asset economy.

The initial phase introduces Votor, replacing on-chain vote transactions with direct validator-to-validator votes that form certificates capable of finalizing blocks in one or two rounds, cutting irreversible wait times by about 99%.

The upgrade enables continued application execution without requiring wallet or fund-sending changes for users, while measurably improving finality speed for deposits, bridges, and merchant settlements.

Solana’s decentralized exchanges recorded roughly 208 million spot trades in the week ending mid-September, approaching the NYSE’s trading volume and signaling expanding liquidity.

Alpenglow follows prior performance upgrades, including Transaction V1 which increased maximum transaction size, with ongoing improvements to slot-time targets aiming for roughly 200–250 milliseconds.

Prominent investors remain optimistic; observers forecast Solana’s market cap could surpass Ethereum’s in the current cycle due to growing adoption and lower network fees.

Solana’s native token rose toward the $117–$120 range, its strongest level since January, with about a 25% gain over the past month.

Alpenglow will later add Rotor, replacing Turbine to distribute block data, while the immediate focus remains on Votor’s faster finality.

Initial testnet migration requires Agave 4.3 and will not support Firedancer or Frankendancer; mainnet launch date remains tentative, with Sept. 28 as a possible but unconfirmed target to enable Agave 4.3 features.

Alpenglow targets about 150 milliseconds finality, a significant improvement from the current ~13 seconds under TowerBFT, while preserving Solana VM, transactions, programs, and fees.