# Apache Solr

> Blazing-fast, open source, multi-modal search platform built on Apache Lucene

- **Canonical URI:** https://www.vioscale.ai/software/apache-solr
- **Category:** Search Engines
- **Homepage:** https://solr.apache.org
- **Also known as:** apache-solr
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-01T21:28:34.024Z

## Vioscale score

**53.7 / 100**, confidence 19% (low).

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 100 | 6 | 600 | ✓ |
| reliability | 0 | 10 | 0 | - |
| capabilities | 45.8 | 17 | 778.9 | ✓ |
| github_stars | 60.7 | 7 | 424.8 | ✓ |
| integrations | 0 | 8 | 0 | - |
| github_activity | 55.5 | 20 | 1110.3 | ✓ |
| release_cadence | 0 | 12 | 0 | - |
| security_posture | 5 | 18 | 0 | - |
| package_downloads | 0 | 6 | 0 | - |
| pricing_transparency | 25 | 8 | 200 | ✓ |
| stackoverflow_activity | 0 | 20 | 0 | - |

## Pricing

_As of 2026-08-01, [verify at source](https://solr.apache.org). Independently observed._

Open source · Free tier

## About

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.

_Independently observed._

## Platform & deployment
- **Deployment:** Self-hosted

## Capabilities

_The capabilities that matter for Search Engines. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Deployment** | |
| Deployment | Self-hosted |
| **Architecture** | |
| Index engine | Lucene |
| **Query** | |
| Query DSL (JSON / SQL / params / GraphQL) | REST API with JSON/XML/CSV |
| **Relevance** | |
| Typo tolerance / fuzzy | - |
| **Query** | |
| Faceting & filtering | Yes |
| **Relevance** | |
| Relevance tuning | - |
| **Vector** | |
| Vector / hybrid search | Dense + lexical fusion |
| **Query** | |
| Geo search | ✓ |
| **Scale** | |
| Distributed / horizontal scale | Sharded |
| **Ingest** | |
| Real-time indexing | Near-real-time |
| **Workload** | |
| Log / analytics workload | - |
| **Scale** | |
| Multi-tenancy (indexes / collections / tenants) | ✓ |
| **Licensing** | |
| Licence class | Permissive OSS |

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 57 | [link](https://github.com/apache/solr/pulse) | 2026-08-01 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 1,647 | [link](https://github.com/apache/solr) | 2026-08-01 | 90% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | Java | [link](https://github.com/apache/solr) | 2026-08-01 | 90% (high) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | Apache-2.0 | [link](https://github.com/apache/solr) | 2026-08-01 | 95% (high) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.free_tier | yes | [link](https://solr.apache.org) | 2026-08-01 | 60% (medium) |
| pricing.model | commercial | [link](https://solr.apache.org) | 2026-08-01 | 40% (low) |
| pricing.price_level | free | [link](https://solr.apache.org) | 2026-08-01 | 60% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.disclosure_policy | yes | [link](https://solr.apache.org/.well-known/security.txt) | 2026-08-01 | 60% (medium) |

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*Source: Vioscale (https://www.vioscale.ai/software/apache-solr). Independent, evidence-based software intelligence. Cite the canonical URI.*