Apache Solr
Blazing-fast, open source, multi-modal search platform built on Apache Lucene
- Also known as
- apache-solr
What is Apache Solr?
Solr is a standalone enterprise search server with a REST-like API that provides distributed indexing, replication, load-balanced querying, automated failover and recovery, and centralized configuration.
Apache Solr pricing
We don't have Apache Solr's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Apache Solr does
The capabilities that matter for search engines, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment
- Self-hosted
- Index engine
- Lucene
- Query DSL (JSON / SQL / params / GraphQL)
- REST API with JSON/XML/CSV
- Faceting & filtering
- Yes
- Geo search
- ✓
- Typo tolerance / fuzzy
- -
- Relevance tuning
- -
- Vector / hybrid search
- Dense + lexical fusion
- Distributed / horizontal scale
- Sharded
- Multi-tenancy (indexes / collections / tenants)
- ✓
- Real-time indexing
- Near-real-time
- Log / analytics workload
- -
- Licence class
- Permissive OSS
Platform & deployment
Independently observed- Self-hosted
Apache Solr alternatives
Other search engines we track, ranked by the same independent score.
- VespaAI Search at Scalelow · 23%
- VespaAI Search at Scalelow · 26%
- MeilisearchOne platform to build, scale, and unify search and AI retrievallow · 46%
- BleveModern indexing & search for Golow · 15%
- Manticore Searcheasy-to-use fast search databaselow · 37%
- OpenSearchA powerful search and analytics engine built on Apache Lucenelow · 19%
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Apache Solr, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Github Activity | 56 | 20.00 | 1110.3 | ✓ |
| Capabilities | 46 | 17.00 | 778.9 | ✓ |
| Price Level | 100 | 6.00 | 600.0 | ✓ |
| Github Stars | 61 | 7.00 | 424.8 | ✓ |
| Pricing Transparency | 25 | 8.00 | 200.0 | ✓ |
| Reliability | 0 | 10.00 | 0.0 | - |
| Integrations | 0 | 8.00 | 0.0 | - |
| Release Cadence | 0 | 12.00 | 0.0 | - |
| Security Posture | 5 | 18.00 | 0.0 | - |
| Package Downloads | 0 | 6.00 | 0.0 | - |
| Stackoverflow Activity | 0 | 20.00 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 57 | mediumsource · 2026-08-01 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 1,647 | highsource · 2026-08-01 · 90% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | {"faceting":"yes","query_dsl":"REST API with JSON/XML/CSV","deployment":"self_hosted","geo_search":true,"distributed":"sharded","index_engine":"lucene","licence_class":"permissive_oss","multi_tenancy":true,"vector_search":"hybrid_fusion","realtime_indexing":"near_real_time"} | mediumsource · 2026-08-01 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Java | highsource · 2026-08-01 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-08-01 · 95% |
Pricing
Security
| Attribute | Value | Evidence |
|---|---|---|
| Disclosure policy | Yes | mediumsource · 2026-08-01 · 60% |