When we decided to build FHE infrastructure on Solana, we got two reactions: "obviously" and "why not Ethereum?"
Here's the full answer.
Performance requirements are non-negotiable
FHE computation is inherently more expensive than plaintext computation. Even with modern TFHE and hardware optimization, encrypted operations carry overhead.
This means you need a base layer that's already fast enough to absorb that overhead and still deliver acceptable user experience.
Ethereum mainnet with 12-second block times and unpredictable gas costs cannot absorb FHE overhead. L2s help, but introduce finality delays and bridging friction.
Solana at 65,000 TPS and 400ms block times has the throughput headroom to support FHE computation costs while maintaining sub-second confirmation for end users.
The data availability model fits
FHE ciphertexts are larger than plaintext data. A 256-bit encrypted value expands significantly in FHE schemes.
Solana's data model and account structure — combined with relatively low DA costs — makes storing ciphertexts economically viable. On Ethereum mainnet, the calldata costs for FHE transactions would be prohibitive.
The ecosystem is ready to experiment
Solana's developer culture is oriented toward novel infrastructure. Jupiter, Jito, Helius, Squads — these teams build first and ask questions later.
The kind of developer who looks at FHE and says "I want to build an encrypted orderbook on this" tends to be a Solana developer.
The Ethereum developer culture is excellent but more risk-averse for new cryptographic primitives. The tooling and auditing expectations are higher, which creates a longer time-to-market for experimental infrastructure.
MEV culture creates demand
Solana's MEV ecosystem is particularly visible. Jito bundles, validator extraction, sandwich attacks — Solana users are acutely aware of being front-run.
This creates a natural demand for FHE-based MEV prevention. On Ethereum, MEV is also real but more diffuse. On Solana, users feel it directly and are motivated to switch to alternatives.
Shield.afhe.io addresses the most acute pain point in the ecosystem where it's most visible.
The counterarguments (fairly stated)
"EVM has more users": True. FHE on EVM (Fhenix, Zama) has a larger total addressable market today. But Solana is growing faster, and first-mover advantage in a specific ecosystem is more valuable than being fifth-mover in a larger one.
"Solana is not decentralized enough for serious DeFi": Reasonable concern. Solana's validator concentration is a known risk. But FHE's security doesn't depend on blockchain decentralization — the encryption itself is the security model.
"What about crosschain?": We're chain-specific now by necessity. Multi-chain FHE coordination is a hard problem we'll address in 2027, not 2026.
The honest summary
We chose Solana because it's the chain where FHE has the best chance of working in practice, with users who feel the problem acutely and developers who move fast.
Is Solana the permanent home for FHE infrastructure? Maybe not forever. But it's the right starting point.
Come build with us.