Apache Solr vs Marqo
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 | Marqo |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 81 · Excellent | 87 · Excellent |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | Apache-2.0 |
| Language | Java | Python |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 4,096 MB |
| Deployment | docker, kubernetes, bare-metal | docker, kubernetes |
| GitHub stars | ★ 1,674 | ★ 5,030 |
| First released | 2006 | 2022 |
| Replaces | Elasticsearch, Algolia | Algolia, Pinecone |
What are Apache Solr and Marqo?
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
Marqo
Marqo is an open-source, end-to-end search engine that combines vector generation, storage and retrieval. It handles embedding creation automatically so you can run semantic search over text and images.
- Built-in embedding generation
- Text and image semantic search
- No separate ML pipeline needed
- Simple REST API
Apache Solr vs Marqo: key differences
Apache Solr is written in Java, while Marqo is built with Python. Apache Solr is the lighter option, starting around 1,024 MB of RAM against 4,096 MB for Marqo. Apache Solr is the more established project (first released 2006), while Marqo arrived in 2022. Marqo has the considerably larger community, at 5,030 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 Marqo if…
- All-in-one vector search
- No external embedding service required
Watch out for
- Heavy GPU or RAM needs for models
Frequently asked questions
Is Apache Solr or Marqo better?
Marqo 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 Marqo free and open-source?
Yes. Apache Solr is licensed under Apache-2.0 and Marqo under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Apache Solr and Marqo with Docker?
Apache Solr: yes. Marqo: yes.
Which is lighter on resources, Apache Solr or Marqo?
Apache Solr has the smaller minimum footprint at 1,024 MB of RAM, compared to about 4,096 MB for Marqo. Real-world usage depends on library size, user count, and enabled features.