bleve vs Pyserini
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | bleve | Pyserini |
|---|---|---|
| Deploy effort | Read-the-docs project | Read-the-docs project |
| Health score | 93 · Excellent | 86 · Excellent |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Python |
| Setup difficulty | Medium | Hard |
| Min. RAM | 128 MB | 2,048 MB |
| Deployment | source, binary | source |
| GitHub stars | ★ 11,228 | ★ 2,166 |
| First released | 2014 | 2019 |
| Replaces | Elasticsearch, Algolia | Elasticsearch |
What are bleve and Pyserini?
bleve
An embeddable modern full-text search and indexing library that lets developers add search to applications without running a separate server. It supports analyzers, faceting, and scoring out of the box.
- Embeddable index
- Text analyzers
- Faceted search
- Pluggable storage
Pyserini
Pyserini is an open-source toolkit for reproducible information retrieval research, providing sparse and dense search over text collections. Self-hosters use it to build and query custom search indexes.
- Sparse and dense retrieval
- Reproducible pipelines
- Custom index building
- Research grade tools
bleve vs Pyserini: key differences
Bleve is written in Go, while Pyserini is built with Python. Bleve is the lighter option, starting around 128 MB of RAM against 2,048 MB for Pyserini. Bleve is the more established project (first released 2014), while Pyserini arrived in 2019. Bleve has the considerably larger community, at 11,228 GitHub stars versus 2,166.
Why pick each one
Choose bleve if…
- No separate server
- Pure Go integration
Watch out for
- Library not turnkey app
- Manual scaling
Choose Pyserini if…
- Strong retrieval features
- Good for experimentation
Watch out for
- Research oriented
- Not a turnkey server
Frequently asked questions
Is bleve or Pyserini better?
bleve is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Pyserini if its specific feature set fits your needs better.
Are bleve and Pyserini free and open-source?
Yes. bleve is licensed under Apache-2.0 and Pyserini under Apache-2.0. Both can be self-hosted at no software cost.
Can I run bleve and Pyserini with Docker?
bleve: check the project docs for container support. Pyserini: check the project docs for container support.
Which is lighter on resources, bleve or Pyserini?
bleve has the smaller minimum footprint at 128 MB of RAM, compared to about 2,048 MB for Pyserini. Real-world usage depends on library size, user count, and enabled features.