zkFHE/circomlib-fhe

zkFHE/circomlib-fhe acts as a research-oriented bridge between the Circom ZK ecosystem and FHE operations. With 48 stars and zero recent velocity, it functions primarily as a static reference for academic or experimental work rather than a production-grade library. Its defensibility is low (3) because it lacks a developer moat, and the field of 'proof of correct FHE execution' has moved rapidly toward more efficient proving systems like Halo2, Plonky3, or specialized GKR-based protocols which handle the massive gate counts of FHE better than standard Circom templates. Frontier labs (OpenAI/Google) are unlikely to compete directly as this is a deep-niche cryptographic infrastructure tool. However, it faces significant displacement risk from active players in the 'Verifiable FHE' space like Zama, Sunscreen, or Mind Network, who are building vertically integrated stacks that optimize these proofs far beyond what a 3-year-old Circom benchmark provides. The age of the repository (1253 days) without updates in a hyper-active field suggests it has already been largely surpassed by newer research.