Charon
zkSync

Who: Alex Gluchowski, who founded Matter Labs ()

What: zkSync is built using Matter Labs’ zkRollup technology

Where: Stichting ZK Sync, Netherlands Foundation, Amsterdam, NL / head office is in Berlin

When: In 2019, Matter Labs announced a USD 2 million Series Seed financing round led by Placeholder and joined by 1kx, Dekrypt, Hashed, and Dragonfly Capital Partners.

Why: To create Ethereum's most advanced ZK rollup.

How: zkPorter account tx data will be sent to Guardians instead of ETH node calldata (only merkle roots instead)

Strengths: security properties of L1, Withdrawals to L1 in under 15 minutes. and EVM compatible rollups!

Weaknesses: issues: sucidal attempt of 2/3rd of guardians would be possible (unlikely) --> every user can select security level (%) for a specific price

Traction: Gitcoin grants since end of 2020

Future Plans: zkPorter (basically a mix of zkRollups and validium)

Further Reading:

zkSync official website: https://zksync.io/

code is open source: https://github.com/matter-labs

zk-porter project: https://medium.com/matter-labs/zkporter-a-breakthrough-in-l2-scaling-ed5e48842fbf