Apache Solr vs ParadeDB
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Apache Solr | ParadeDB |
|---|---|---|
| Deploy effort | Under-an-hour setup | ≈5-minute setup |
| Health score | 81 · Excellent | 92 · Excellent |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | AGPL-3.0 |
| Language | Java | Rust |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 1,024 MB |
| Deployment | docker, kubernetes, bare-metal | docker, source |
| GitHub stars | ★ 1,674 | ★ 9,301 |
| First released | 2006 | 2023 |
| Replaces | Elasticsearch, Algolia | Elasticsearch |
What are Apache Solr and ParadeDB?
Apache Solr
Apache Solr is a highly reliable, scalable and fault-tolerant open-source search platform built on Apache Lucene. It powers full-text search, faceting and analytics for many large websites and applications.
- Lucene-powered full-text search
- Faceting and rich querying
- Distributed SolrCloud mode
- Extensive plugin ecosystem
ParadeDB
ParadeDB is an open-source PostgreSQL-based platform that adds Elasticsearch-grade full-text search and analytics directly inside the database. It uses BM25 indexing so search can run alongside existing relational data.
- Search inside Postgres
- BM25 full-text indexing
- Analytical queries
- No separate search cluster
Apache Solr vs ParadeDB: key differences
Apache Solr is written in Java, while ParadeDB is built with Rust. Licensing differs — Apache-2.0 for Apache Solr versus AGPL-3.0 for ParadeDB. Apache Solr is the more established project (first released 2006), while ParadeDB arrived in 2023. ParadeDB has the considerably larger community, at 9,301 GitHub stars versus 1,674.
Why pick each one
Choose Apache Solr if…
- Mature and battle-tested
- Powerful faceting
Watch out for
- Configuration is complex
Choose ParadeDB if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Mature project with 9.3k GitHub stars
- Written in Rust
Frequently asked questions
Is Apache Solr or ParadeDB better?
ParadeDB is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Apache Solr if its specific feature set fits your needs better.
Are Apache Solr and ParadeDB free and open-source?
Yes. Apache Solr is licensed under Apache-2.0 and ParadeDB under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Apache Solr and ParadeDB with Docker?
Apache Solr: yes. ParadeDB: yes.