A public blockchain transaction reveals everything. That transparency is a feature for verification, but a liability for anyone who wants to move value without broadcasting their balance to the world. It is the central tension in decentralized finance, one that has kept institutional capital and regulated entities at a cautious distance. A new Paris-based joint venture called Zaiffer is betting it can resolve that tension with a cryptographic tool that was, until recently, the domain of academic papers.
Zaiffer is building a protocol that uses fully homomorphic encryption (FHE) to create confidential tokens, or cTokens, on Ethereum Virtual Machine (EVM) compatible chains [Chainwire, November 2025]. The core promise is selective disclosure. Users can "confidentialize" standard tokens, hiding the transaction amount on-chain, while preserving the ability to reveal that data to specific parties like auditors or regulators for compliance checks [Zaiffer.org blog, November 2025]. A demo application is already live on the Sepolia testnet, with a mainnet launch planned before the end of 2025 [Chainwire, November 2025].
The Cryptographic Wedge
The technical wedge is FHE, a form of encryption that allows computations on encrypted data without needing to decrypt it first. For Zaiffer, this means a user's token balance and transaction amounts can remain encrypted on the public ledger, yet still be used in DeFi applications like lending or trading. The protocol is designed to be permissionless and non-custodial, fitting the ethos of existing DeFi infrastructure.
The more pragmatic wedge is compliance. By building selective disclosure into the protocol's foundation, Zaiffer is directly addressing anti-money laundering (AML) and sanctions screening requirements. This positions it not just as a privacy tool for crypto-natives, but as a potential on-ramp for traditional finance entities that have been wary of DeFi's pseudonymous nature. The target market includes exchanges, institutional traders, and auditors who need privacy but cannot operate outside regulatory frameworks.
Backing from the Source
Zaiffer is not a typical startup. It was formed as a joint venture between two established Paris entities: Zama, a leader in open-source FHE cryptography, and PyratzLabs, a Web3 venture builder [Tech.eu, November 2025]. This structure is its most significant early asset. The €2 million (approximately $2.2 million) in pre-seed funding came directly from its parent companies, a move that signals deep technical alignment and removes the typical seed-stage investor search [Chainwire, November 2025].
- Technical moat. Zama's involvement provides direct access to cutting-edge FHE research and implementation talent, a critical advantage in a field where expertise is scarce.
- Market access. PyratzLabs brings connections and operational knowledge within the Web3 ecosystem, which will be essential for driving protocol adoption among developers.
- Capital efficiency. The joint venture model with committed capital from its founders allows Zaiffer to focus on protocol development without immediate pressure to raise external rounds.
The venture has emerged from stealth with a working testnet demo but no named pilot customers or revenue figures. Its success will hinge on developer adoption and the performance of its FHE proofs under real mainnet conditions, where transaction speed and cost are non-negotiable.
The Mainnet Question
The roadmap is clear, but the execution risks are just as visible. FHE is computationally intensive, and integrating it into high-frequency DeFi applications could lead to prohibitive gas fees or latency. Zaiffer will need to prove its implementation is sufficiently optimized for everyday use. Furthermore, while the protocol is permissionless, its value for regulated institutions depends on the robustness and legal acceptance of its selective disclosure mechanisms. These are unproven in a live financial environment.
Zaiffer's €2 million joint venture round from Zama and PyratzLabs sets a foundation. The question for Q4 2025 is whether mainnet launch metrics,developer integrations, transaction volume, and gas cost benchmarks,will convince the next layer of investors that FHE's time in DeFi has finally arrived.
Sources
- [Chainwire, November 2025] Zama and Pyratzlabs Establish Zaiffer, a Joint Venture | https://chainwire.org/2025/11/12/zama-and-pyratzlabs-establish-zaiffer-a-joint-venture-for-confidential-and-compliant-onchain-finance/
- [Tech.eu, November 2025] Zaiffer launches with €2M backing from Zama and PyratzLabs | https://tech.eu/2025/11/12/zaiffer-launches-with-eur2m-backing-from-zama-and-pyratzlabs-to-bring-confidentiality-to-defi/
- [Zaiffer.org blog, November 2025] Introducing Zaïffer: Pioneering Financial Privacy | https://www.zaiffer.org/articles/introducing-zaiffer-pioneering-financial-privacy-in-the-blockchain-era