Microsoft SEAL vs Stoffel: Side-by-Side Comparison (2026)

Microsoft SEAL: Microsoft SEAL is an open-source homomorphic encryption library that enables arithmetic computations on encrypted data without decryption, supporting privacy-preserving applications across multiple platforms..

Stoffel: Privacy-first app dev platform using MPC to compute on encrypted data. built by Stoffel. Core capabilities include Secure multi-party computation for encrypted data processing, Stoffel-Lang domain-specific language for privacy-preserving logic, StoffelVM runtime for executing computations on encrypted inputs..

Both serve the Confidential Computing market but differ in approach, feature depth, and target audience.

Microsoft SEAL is open-source with 3,862 GitHub stars. Stoffel is developed by Stoffel. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Microsoft SEAL and Stoffel serve similar Confidential Computing use cases: both are Confidential Computing tools, both cover Open Source. Key differences: Microsoft SEAL is Free while Stoffel is Commercial, Microsoft SEAL is open-source. Review the feature comparison above to determine which fits your requirements.