# Solana Activates Alpenglow

> Solana switches from TowerBFT to Alpenglow consensus protocol.
- Title: Solana Activates Alpenglow · TokenPost | Shortify
- Summary: Solana switches from TowerBFT to Alpenglow consensus protocol. Solana’s mainnet switched to Alpenglow consensus protocol on Oct 21, ending TowerBFT’s…
- Keywords: solana, alpenglow, towerbft, consensus protocol, mainnet, blockchain, crypto, finance, Activates, TokenPost
- Source: TokenPost — https://tokenpost.com/news/technology/37324
- Published: 2026-10-22T02:13:49+00:00
- Read time: 1 min
- Topics: solana, alpenglow, towerbft, consensus protocol, mainnet, blockchain, crypto, finance
## Solana Activates Alpenglow
Solana’s Alpenglow consensus system took control of mainnet on Wednesday, Oct. 21, ending TowerBFT’s role after more than six years.
## How Alpenglow Works
Alpenglow changes how validators vote: they send votes directly to one another and bundle them into certificates, rather than putting votes in on-chain transactions processed in later blocks.
## Finality Target
The protocol’s stated finality target is about 150 milliseconds, though TowerBFT’s historical finality was about 12.8 seconds.
## Key takeaway

Solana’s mainnet switched to Alpenglow consensus protocol on Oct 21, ending TowerBFT’s six-year role.