# OpenSearch vs Thesys

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

| | OpenSearch | Thesys |
|---|---|---|
| Score | 76/100 ✓ | 41/100 |
| Rank in category | #7 of 41 in Search Engines | #5 of 5 in Research |
| GitHub stars | 13 932 ✓ | 177 |
| Stars, last 30 days | +157 ✓ | +0 |
| Stable releases, 12 months | 11 ✓ | 5 |
| Latest release | 2.19.7 · 17 Oct 2026 ✓ | v0.4.0 · 23 Sept 2026 |
| Setup | Moderate ✓ | Moderate |
| Official Docker image | Yes ✓ | No |
| License | Apache-2.0 | AGPL-3.0 |
| Main language | Java | Typescript |

## Which one should you pick?

OpenSearch scores 76/100 against 41/100 for Thesys, so it is the safer default.

OpenSearch ships more often: 11 stable releases in the past year, against 5 for Thesys.

OpenSearch is growing faster right now (+157 stars in 30 days).

## Details

- [OpenSearch](https://selfhost.directory/project/opensearch) (markdown: https://selfhost.directory/project/opensearch.md)
- [Thesys](https://selfhost.directory/project/thesys-core) (markdown: https://selfhost.directory/project/thesys-core.md)

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Source: https://selfhost.directory/compare/opensearch-vs-thesys-core