# occlum/occlum

Occlum is a memory-safe, multi-process library OS for Intel SGX

Repository: https://github.com/occlum/occlum
Canonical: https://ross.abutalabs.com/products/occlum
Homepage: https://occlum.io/
Language: Rust
License: NOASSERTION
License Family: other
Topics: intel-sgx, os, rust, cloud, security, enclave
Last push: 2026-02-05T17:16:42+00:00

## Health v2 (maintenance only)
Score: 52/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 66, release rhythm 8, longevity 100
- inputs: {"age_days": 2850, "days_push": 209, "days_rel": 527, "gap_med": null, "n_releases_24m": 1}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1532, forks 249 (observed 2026-08-28T04:04:59.501178+00:00)

## What it is
Occlum is a memory-safe, multi-process library OS (LibOS) written in Rust for Intel SGX enclaves. It lets legacy applications run inside secure enclaves with little or no source-code modification via simple commands like occlum init, build, and run.

## Use cases
- run unmodified linux applications inside intel sgx enclaves
- protect confidential workloads on untrusted cloud infrastructure
- run multiple processes efficiently within a single sgx enclave
- encrypt and integrity-protect application file systems in enclaves
- port existing binaries to trusted execution environments without rewriting code

## When to choose
- you need to run legacy apps in SGX with minimal code changes
- you want memory-safe LibOS processes with fast startup and IPC
- you need encrypted or hashed file systems inside enclaves

## When to avoid
- your hardware does not support Intel SGX
- you need a general-purpose OS outside enclave computing
- you require per-enclave process isolation rather than shared-enclave multitasking

## Facets
- artifact type: library
- maturity: active
- function: security, container-runtime, file-system, concurrency
- domain: security, cloud-computing, operating-systems
- platform: rust, cloud
- tags: intel-sgx, libos, trusted-execution-environment, enclave, confidential-computing, linux

## Member repositories
- occlum/occlum (main) score 52

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:59.501178+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:31:20.054355+00:00, confidence not recorded.
  - readme: https://github.com/occlum/occlum (fetched 2026-08-28T04:04:59.501178+00:00, sha 5f7b07faa5ea)
  - homepage: https://occlum.io/ (fetched 2026-08-29T11:33:27.069668+00:00, sha bbbd77494322)
- Data as of 2026-08-30T08:39:29.467469+00:00.