Blast vs Tantivy
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Blast | Tantivy |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 14 · At risk | 94 · Excellent |
| Status | Archived | Actively maintained |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | MIT |
| Language | Go | Rust |
| Setup difficulty | Hard | Hard |
| Min. RAM | 512 MB | 128 MB |
| Deployment | docker, binary, source | source, binary |
| GitHub stars | ★ 1,073 | ★ 16,133 |
| First released | 2017 | 2016 |
| Replaces | Elasticsearch | Elasticsearch |
What are Blast and Tantivy?
Blast
Blast is a full-text search and indexing server written in Go and built on the Bleve library, with support for clustering through the Raft consensus algorithm. It exposes both gRPC and HTTP APIs for indexing and searching documents.
- Distributed clustering
- Bleve-based indexing
- gRPC and HTTP APIs
- Raft consensus
Tantivy
Tantivy is a full-text search engine library inspired by Apache Lucene and written in Rust. It is the foundation for several search engines and can be embedded directly into applications.
- Lucene-like full-text indexing
- Embeddable search library
- Fast and memory efficient
- Powers Quickwit and others
Blast vs Tantivy: key differences
The biggest difference is maintenance: Blast's repository is archived and no longer developed, while Tantivy is actively maintained. Blast is written in Go, while Tantivy is built with Rust. Licensing differs — Apache-2.0 for Blast versus MIT for Tantivy. Tantivy is the lighter option, starting around 128 MB of RAM against 512 MB for Blast. Tantivy has the considerably larger community, at 16,133 GitHub stars versus 1,073. Blast lists first-class Docker deployment; Tantivy does not.
Why pick each one
Choose Blast if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Active community (1.1k GitHub stars)
- Written in Go
Choose Tantivy if…
- Very fast
- Embeddable in apps
Watch out for
- Library, not a turnkey server
Frequently asked questions
Is Blast or Tantivy better?
Neither is universally better. Tantivy has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Blast and Tantivy free and open-source?
Yes. Blast is licensed under Apache-2.0 and Tantivy under MIT. Both can be self-hosted at no software cost.
Can I run Blast and Tantivy with Docker?
Blast: yes. Tantivy: check the project docs for container support.
Which is lighter on resources, Blast or Tantivy?
Tantivy has the smaller minimum footprint at 128 MB of RAM, compared to about 512 MB for Blast. Real-world usage depends on library size, user count, and enabled features.