Light Protocol

Light Protocol built the ZK Compression framework for Solana, an open-source protocol that reduces the cost of on-chain state — token accounts and program-derived accounts — by up to 99%, enabling applications to scale to millions of users without the rent overhead that made mass-market Solana apps previously prohibitive.

What It Does

ZK Compression reframes where application state lives. Rather than storing every account in Solana's expensive account space (which requires rent-exempt deposits), the protocol stores cryptographic commitments — state roots — on-chain while keeping the full account data in Solana's much cheaper ledger space. Zero-knowledge validity proofs allow the on-chain programs to verify that any piece of compressed state is authentic and untampered, maintaining the security guarantees of the base layer without the storage cost.

The result is dramatic: creating a token account under ZK Compression costs roughly 5,000 lamports versus the standard ~2,000,000 lamports. At the application level, airdropping tokens to one million wallets drops from approximately $260,000 to around $50. Program-derived accounts (PDAs) see comparable savings, with a 100-byte PDA costing ~0.000015 SOL compressed versus ~0.0016 SOL on standard Solana.

Technical Architecture

ZK Compression works through a sparse Merkle tree structure. Compressed accounts are leaves in these trees; the root is stored on-chain. When a user or program interacts with a compressed account, a Merkle proof is generated off-chain and verified on-chain by Light Protocol's smart contracts using zero-knowledge proofs. Nullifiers prevent double-spending or duplicate instruction execution, making the framework suitable not just for token distribution but for payment systems and more sophisticated ZK applications.

The protocol natively supports both compressed tokens (SPL and Token 2022 mints) and compressed PDAs — the two account types that dominate most Solana application state. An additional primitive, the Solana Attestation Service, allows issuing compressed-account-backed attestations, with devnet availability already live.

Developer Tooling

Light Protocol ships TypeScript and Rust SDKs, Anchor constraints, and a JSON-RPC extension that RPC providers can serve alongside standard Solana RPC calls. Wallet integration guides cover balance display and transaction history. The project has also published MCP (Model Context Protocol) connections, allowing AI agents to interact with ZK Compression natively. Phantom and Backpack are among the wallets that have integrated compressed token support, and several leading RPC providers serve the extended API.

The team contributed foundational ZK syscalls directly to the Solana runtime — sol_poseidon, sol_alt_bn128_group_op, and sol_alt_bn128_compression — making it possible to verify certain ZK proofs inside the Solana virtual machine at all. These syscalls are now used by Anza and other organizations building on Solana's cryptographic layer.

Security and Audits

ZK Compression has undergone an unusually broad audit programme for a Solana-native protocol. Ten separate audit engagements span six independent firms:

• OtterSec (August 2024, March 2025, June 2025, December 2025): reviewed ZK Compression v1, the Zerocopy implementation, batched Merkle trees, and a CPI context refactor
• Zellic (September 2024): ZK Compression v1
• Neodyme (August 2024): ZK Compression v1
• HashCloak (March 2025): compressed token program and ZK Compression v2
• Accretion (January 2025, June 2025): compressed token program update and ZK Compression v2
• Certora (December 2025): Light Token

In addition, Reilabs conducted formal verification of the Groth16 circuit implementation, and the team ran a public trusted setup ceremony for the Groth16 circuits with a published GitHub repository. A bug bounty programme through Immunefi is also active. All audit reports are publicly accessible via Light Protocol's GitHub.

Team and Funding

Light Protocol was co-founded by Swen Schäferjohann and Jorrit Palfner (CEO). The team began developing high-performance Solana programs in 2021, open-sourced an early ZK privacy layer in January 2022, and launched Light Shield — Solana's first on-chain ZK-SNARK verification product — in April 2022.

In October 2022, Light Protocol Labs raised a $4.2 million seed round led by Polychain Capital, with participation from Hypersphere, Solana Ventures, Dao5, Asymmetric, Anagram, Ecco Capital, Advanced Blockchain, and dLab. Angel investors included Balaji Srinivasan, Steve Vassallo, Michelle Lai, Jules de Smit, Yonatan Ben-Shimon, and Norbert Bodziony.

ZK Compression itself launched publicly in 2024 in collaboration with Helius Labs and the Solana Foundation. As of mid-2026, the protocol has facilitated the creation of approximately 90 million compressed accounts.

Helius Acquisition

In June 2026, Helius — Solana's leading RPC and infrastructure provider — acquired Light Protocol. The acquisition keeps ZK Compression fully open-source, with documentation, RPCs, and core tooling continuing uninterrupted under expanded Helius stewardship. The Light team joins Helius with the stated goal of building Solana's canonical programmable privacy layer, covering encrypted balances, encrypted payments, and encrypted markets with selective disclosure and auditability. Jorrit Palfner described privacy as "the single most important primitive we can build and scale on Solana."

Tokens and Assets

Light Protocol has issued no native protocol token. The protocol handles compressed versions of standard SPL tokens and Token 2022 mints, not a proprietary asset.

Solana Fit

ZK Compression is architecturally Solana-native rather than a separate rollup or bridge. It operates within the same validator set and consensus model, does not require a security council multisig, and extends rather than forks Solana's account model. For developers targeting consumer-scale applications — token distribution, loyalty programs, payments, on-chain gaming inventories, identity attestations — ZK Compression eliminates the rent cost that made per-user state storage economically impractical. With 90 million compressed accounts created and an expanding audit surface, the protocol has moved from experimental to a core piece of Solana's scaling infrastructure.