# OpenSearch vs Ultimate Certificate Manager

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | OpenSearch | Ultimate Certificate Manager |
|---|---|---|
| Score | 76/100 ✓ | 50/100 |
| Rank in category | #7 of 41 in Search Engines | #4 of 8 in Certificate Management |
| GitHub stars | 13 930 ✓ | 170 |
| Stars, last 30 days | +155 ✓ | +0 |
| Stable releases, 12 months | 11 ✓ | 4 |
| Latest release | 2.19.7 · 17 Oct 2026 | v2.246 · 27 Oct 2026 ✓ |
| Setup | Moderate ✓ | Moderate |
| Official Docker image | Yes | Yes |
| License | Apache-2.0 | AGPL-3.0 |
| Main language | Java | Python |

## Which one should you pick?

OpenSearch scores 76/100 against 50/100 for Ultimate Certificate Manager, so it is the safer default.

OpenSearch ships more often: 11 stable releases in the past year, against 4 for Ultimate Certificate Manager.

OpenSearch is growing faster right now (+155 stars in 30 days).

## Details

- [OpenSearch](https://selfhost.directory/project/opensearch) (markdown: https://selfhost.directory/project/opensearch.md)
- [Ultimate Certificate Manager](https://selfhost.directory/project/ultimate-ca-manager) (markdown: https://selfhost.directory/project/ultimate-ca-manager.md)

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Source: https://selfhost.directory/compare/opensearch-vs-ultimate-ca-manager