Fortanix Confidential Computing vs Microsoft SEAL: Side-by-Side Comparison (2026)

Fortanix Confidential Computing

Enterprise security teams protecting sensitive computation on untrusted infrastructure need Fortanix Confidential Computing because it encrypts data while it's actively processing, not just in transit or at rest. Intel SGX and AMD SEV support across major cloud providers means you're getting hardware-backed isolation that the OS and hypervisor can't breach, directly strengthening PR.DS and PR.PS controls. Skip this if your threat model doesn't include a compromised cloud provider or if you're managing workloads that can't be refactored for enclave execution; Fortanix demands architectural changes, not just a policy checkbox.

Microsoft SEAL

Cryptography teams and researchers building privacy-preserving applications need Microsoft SEAL because homomorphic encryption lets you compute directly on encrypted data without ever exposing plaintext, eliminating a whole class of data exposure risks. The library supports BFV and CKKS schemes across Windows, Linux, and macOS with active maintenance reflected in its 3,862 GitHub stars and regular updates. Skip this if your organization needs a turnkey data masking product with UI-driven policies; SEAL requires deep cryptographic expertise and development resources to implement correctly.