# Apache Solr vs Vespa

| Attribute | Apache Solr | Vespa |
|---|---|---|
| **Vioscale score** | 53.6 (40% (low)) | 56.1 (77% (high)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 0 | 7 |
| adoption.github_stars | 1,667 | 7,069 |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"hybrid":true,"self_hosted":true}` |
| description.long | Apache Solr is a server-based search platform built on Apache Lucene, enabling full-text, vector, and geospatial search through HTTP REST APIs. It supports distributed indexing, fault-tolerant replication, and near real-time query processing with multi-tenant support. | A distributed serving engine that unifies retrieval, ranking, machine learning inference, and real-time serving for business-critical AI applications. |
| features.capabilities | `{"faceting":"yes","query_dsl":"HTTP REST API with JSON/XML/CSV","deployment":"self_hosted","geo_search":true,"distributed":"clustered","index_engine":"lucene","licence_class":"permissive_oss","multi_tenancy":true,"vector_search":"hybrid_fusion","realtime_indexing":"near_real_time"}` | `{"deployment":"self_hosted","distributed":"sharded","index_engine":"custom","licence_class":"permissive_oss","vector_search":"hybrid_fusion","typo_tolerance":"configurable","deployment_model":"hybrid","relevance_tuning":"ranking_rules","realtime_indexing":"near_real_time","generative_ai_answer_synthesis_rag":true,"multi_lingual_semantic_understanding":true,"hybrid_dense_and_sparse_lexical_reranking":true}` |
| integrations.count | 10 | 12 |
| integrations.list | `[{"name":"Apache Lucene"},{"name":"Apache Zookeeper"},{"name":"Apache Tika"},{"name":"Docker"},{"name":"Kubernetes"},{"name":"Apache ManifoldCF"},{"name":"Apache Spark"},{"name":"Apache Nutch"},{"name":"Apache Zeppelin"},{"name":"Apache OpenNLP"}]` | `[{"name":"Python"},{"name":"Cohere"},{"name":"TwelveLabs"},{"name":"Claude Code"},{"name":"OpenAI Codex"},{"name":"Google Gemini"},{"name":"Cursor"},{"name":"VSCode"},{"name":"IntelliJ"},{"name":"PyCharm"},{"name":"AWS"},{"name":"GCP"}]` |
| language.primary | Java | Java |
| license.spdx | Apache-2.0 | Apache-2.0 |
| market.availability | - | `{"hqCountry":"NO","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"linux":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://solr.apache.org","retrievedAt":"2026-08-14T21:34:00.435Z"}` | `{"type":"subscription","summary":"Free trial available; contact sales for paid plan pricing","freeTier":true,"sourceUrl":"https://vespa.ai/pricing/","retrievedAt":"2026-08-21T12:45:29.228Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | no |
| release.cadence_days | - | 3 |
| release.history | - | `[{"url":"https://github.com/vespa-engine/vespa/releases/tag/lsp-v2.5.0","date":"2026-08-24T08:45:45Z","type":"stable","version":"lsp-v2.5.0"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.738.17","date":"2026-08-13T04:51:03Z","type":"stable","version":"v8.738.17"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.736.12","date":"2026-08-10T02:24:28Z","type":"stable","version":"v8.736.12"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.733.3","date":"2026-08-05T09:03:54Z","type":"stable","version":"v8.733.3"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.730.36","date":"2026-07-28T04:47:04Z","type":"stable","version":"v8.730.36"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.719.5","date":"2026-07-07T02:30:19Z","type":"stable","version":"v8.719.5"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.709.19","date":"2026-06-18T18:42:59Z","type":"stable","version":"v8.709.19"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.708.30","date":"2026-06-18T04:26:19Z","type":"stable","version":"v8.708.30"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.707.16","date":"2026-06-16T14:15:49Z","type":"stable","version":"v8.707.16"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.703.17","date":"2026-06-09T16:31:53Z","type":"stable","version":"v8.703.17"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.702.91","date":"2026-06-09T02:20:48Z","type":"stable","version":"v8.702.91"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/lsp-v2.4.10","date":"2026-06-08T04:18:37Z","type":"stable","version":"lsp-v2.4.10"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.700.24","date":"2026-06-04T11:28:16Z","type":"stable","version":"v8.700.24"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.699.8","date":"2026-06-03T02:24:29Z","type":"stable","version":"v8.699.8"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.696.20","date":"2026-05-28T17:58:23Z","type":"stable","version":"v8.696.20"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.695.32","date":"2026-05-28T02:25:07Z","type":"stable","version":"v8.695.32"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.694.53","date":"2026-05-27T02:20:47Z","type":"stable","version":"v8.694.53"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.692.16","date":"2026-05-21T08:17:06Z","type":"stable","version":"v8.692.16"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.691.19","date":"2026-05-19T18:07:31Z","type":"stable","version":"v8.691.19"},{"url":"https://github.com/vespa-engine/vespa/releases/tag/v8.687.75","date":"2026-05-12T02:27:04Z","type":"stable","version":"v8.687.75"}]` |
| reliability.status_page | - | yes |
| security.disclosure_policy | yes | yes |
| security.gdpr | - | yes |
| security.scorecard | - | 5.8 |
| security.soc2 | - | yes |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=helm&package_name=apache-solr%2Fsolr&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.yahoo.vespa%3Acontainer-test&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Search Engines)

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

*Source: Vioscale. Generated 2026-09-01T16:55:04.076Z. "-" = undocumented, not absent.*