# Netflix/lemur

Repository for the Lemur Certificate Manager

Repository: https://github.com/Netflix/lemur
Canonical: https://ross.abutalabs.com/products/lemur
Language: Python
License: Apache-2.0
License Family: permissive
Topics: tls, ssl, ssl-certificates, aws, python, security
Archived: true
Last push: 2026-07-06T23:50:40+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 91, release rhythm 92, longevity 100
- inputs: {"age_days": 4096, "days_push": 58, "days_rel": 58, "gap_med": 26, "n_releases_24m": 4}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1772, forks 320 (observed 2026-08-28T04:05:34.218257+00:00)

## What it is
Lemur is a TLS certificate management and orchestration service that acts as a broker between certificate authorities and environments, providing a central portal for developers to issue certificates with sane defaults. It is a Python-based web application from Netflix, now archived and read-only as of July 2026.

## Use cases
- manage tls certificates across my infrastructure
- issue ssl certificates from a central portal
- track certificate expiration and renewals
- broker certificate requests to multiple CAs
- self-hosted certificate lifecycle management
- automate ssl certificate issuance for aws environments

## When to choose
- you need centralized TLS certificate issuance and tracking across many teams or CAs
- you want a self-hosted alternative to ad-hoc certificate management
- you are already invested in Lemur and only need to keep running an existing deployment

## When to avoid
- you need active maintenance, security patches, or community support - the project is archived and read-only
- you only need simple ACME/Let's Encrypt automation where tools like certbot or Caddy suffice
- you are starting a new certificate management deployment from scratch

## Facets
- artifact type: service
- maturity: abandoned
- function: security, self-hosted, web-framework, api-framework
- domain: security, self-hosted, web-development
- platform: python, self-hosted
- tags: tls, ssl-certificates, certificate-management, pki, certificate-authority, archived, aws, devops, web-server, docker, linux, macos

## Member repositories
- Netflix/lemur (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:34.218257+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 2026-08-30T03:25:56.875762+00:00, confidence not recorded.
  - readme: https://github.com/Netflix/lemur (fetched 2026-08-28T04:05:34.218257+00:00, sha 83f4dfc43f4e)
  - registry_pypi: https://pypi.org/pypi/lemur/json (fetched 2026-08-29T11:04:05.336141+00:00, sha f01797cd664b)
- Data as of 2026-08-30T08:39:29.467469+00:00.