Poseidon is a zero-knowledge (ZK) shielded transaction system built on Solana.
It uses Groth16 zkSNARKs and a Merkle tree of note commitments to enable private deposits, transfers, and withdrawals while keeping user activity hidden on-chain. Unlike centralized privacy tools that depend on external APIs, Poseidon is fully decentralized and runs trustlessly on Solana.
Anyone can view funds moving in and out of the pool, but individual deposits cannot be linked to specific withdrawals, preserving strong financial privacy.