ParadeDB vs RediSearch
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | ParadeDB | RediSearch |
|---|---|---|
| Deploy effort | ≈5-minute setup | Under-an-hour setup |
| Health score | 92 · Excellent | 90 · Excellent |
| Category | Search Engines | Search Engines |
| License | AGPL-3.0 | RSALv2 |
| Language | Rust | Rust |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 512 MB |
| Deployment | docker, source | docker, kubernetes, binary |
| GitHub stars | ★ 9,301 | ★ 6,242 |
| First released | 2023 | 2017 |
| Replaces | Elasticsearch | Elasticsearch, Algolia |
What are ParadeDB and RediSearch?
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
RediSearch
RediSearch, part of the Redis Query Engine, adds full-text search, secondary indexing and vector search capabilities to Redis. It enables fast querying over data already stored in Redis.
- Full-text search inside Redis
- Secondary indexing of Redis data
- Vector similarity search
- Aggregations and queries
ParadeDB vs RediSearch: key differences
Both projects are written in Rust. Licensing differs — AGPL-3.0 for ParadeDB versus RSALv2 for RediSearch. RediSearch is the lighter option, starting around 512 MB of RAM against 1,024 MB for ParadeDB. RediSearch is the more established project (first released 2017), while ParadeDB arrived in 2023.
Why pick each one
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
Choose RediSearch if…
- Very fast, in-memory
- Reuses existing Redis
Watch out for
- Source-available, not OSI licensed
Frequently asked questions
Is ParadeDB or RediSearch better?
Neither is universally better. ParadeDB has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are ParadeDB and RediSearch free and open-source?
Yes. ParadeDB is licensed under AGPL-3.0 and RediSearch under RSALv2. Both can be self-hosted at no software cost.
Can I run ParadeDB and RediSearch with Docker?
ParadeDB: yes. RediSearch: yes.
Which is lighter on resources, ParadeDB or RediSearch?
RediSearch has the smaller minimum footprint at 512 MB of RAM, compared to about 1,024 MB for ParadeDB. Real-world usage depends on library size, user count, and enabled features.