# Google Vertex AI Search vs LightRAG

**Leader by vioscaleAI score:** LightRAG

| Attribute | Google Vertex AI Search | LightRAG |
|---|---|---|
| **vioscaleAI score** | 47.2 (34% (low)) | 61.7 (53% (medium)) |
| activity.commits_last_30d | - | 100 |
| adoption.dependent_repos | - | 0 |
| adoption.github_stars | - | 40,136 |
| content.faq | `[{"answer":"A comprehensive development platform that enables teams to rapidly create and scale autonomous agents powered by multiple AI model options, with built-in governance, enterprise data grounding, and integration capabilities. It is indexed under RAG Tools.","source":"https://cloud.google.com/vertex-ai-search-and-conversation","question":"What is Google Vertex AI Search?","confidence":0.6},{"answer":"Google Vertex AI Search offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://cloud.google.com/vertex-ai-search-and-conversation","question":"Is Google Vertex AI Search free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Google Vertex AI Search. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://cloud.google.com/vertex-ai-search-and-conversation","question":"What platforms does Google Vertex AI Search support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Google Vertex AI Search, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://cloud.google.com/vertex-ai-search-and-conversation","question":"Can Google Vertex AI Search be self-hosted?","confidence":0.6},{"answer":"We have confirmed 8 integrations for Google Vertex AI Search, including Google Cloud Storage, Google Cloud Logging, Google Cloud Monitoring, BigQuery, Cloud Data Fusion, Cloud Dataflow, Cloud Composer and Service Directory. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://cloud.google.com/vertex-ai-search-and-conversation","question":"What does Google Vertex AI Search integrate with?","confidence":0.6},{"answer":"Google Vertex AI Search is available worldwide. Its primary market is the United States.","source":"https://cloud.google.com/vertex-ai-search-and-conversation","question":"Where is Google Vertex AI Search available?","confidence":0.5}]` | `[{"answer":"A lightweight RAG system that processes documents through flexible parsing engines and supports local deployment of embedding, reranking, and storage backends. Includes built-in citation attribution and can work with various open-source LLMs and embedding models. It is indexed under RAG Tools.","source":"https://github.com/pricing","question":"What is LightRAG?","confidence":0.6},{"answer":"LightRAG supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://github.com/pricing","question":"What platforms does LightRAG support?","confidence":0.6},{"answer":"Yes. LightRAG can be deployed cloud / SaaS, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://github.com/pricing","question":"Can LightRAG be self-hosted?","confidence":0.6},{"answer":"Yes. LightRAG is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/HKUDS/LightRAG","question":"Is LightRAG open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true}` | `{"on_prem":true,"self_hosted":true}` |
| description.long | A Google-managed cloud solution that enables rapid development of search engines powered by generative AI and retrieval-augmented generation, supporting indexing and searching across websites and enterprise data. | An open-source RAG system designed for high scalability that uses both knowledge graphs and vector search to retrieve information from large datasets with reduced computational overhead and faster response times. |
| features.capabilities | `{"multimodal_rag":true,"llm_provider_agnostic":true,"managed_ingestion_pipeline":true}` | `{"open_source":true,"multimodal_rag":true,"hybrid_retrieval":true,"citation_attribution":true,"llm_provider_agnostic":true,"reranking_integration":true,"managed_ingestion_pipeline":true,"embedding_provider_agnostic":true,"multi_hop_agentic_retrieval":false}` |
| integrations.count | 8 | 9 |
| integrations.list | `[{"name":"Google Cloud Storage"},{"name":"Google Cloud Logging"},{"name":"Google Cloud Monitoring"},{"name":"BigQuery"},{"name":"Cloud Data Fusion"},{"name":"Cloud Dataflow"},{"name":"Cloud Composer"},{"name":"Service Directory"},{"name":"Gemini","native":true}]` | `[{"name":"PostgreSQL","native":true,"category":"storage"},{"name":"Neo4j","native":true,"category":"storage"},{"name":"MongoDB","native":true,"category":"storage"},{"name":"Milvus","native":true,"category":"storage"},{"name":"Qdrant","native":true,"category":"storage"},{"name":"Redis","native":true,"category":"storage"},{"name":"Memgraph","native":true,"category":"storage"},{"name":"MinerU","native":true},{"name":"Docling","native":true}]` |
| language.primary | - | Python |
| license.spdx | - | MIT |
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"cli":true,"mac":true,"web":true,"linux":true}` |
| pricing | `{"type":"usage","summary":"Usage-based pricing for tools, storage, compute, and cloud resources. New customers receive $300 in free credits.","currency":"USD","freeTier":true,"sourceUrl":"https://cloud.google.com/vertex-ai-search-and-conversation","retrievedAt":"2026-09-06T13:44:28.320Z"}` | `{"type":"open_source","sourceUrl":"https://github.com/pricing","retrievedAt":"2026-09-14T09:25:31.588Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | freemium | open_source |
| pricing.price_level | low | free |
| pricing.transparent | no | - |
| release.cadence_days | - | 7 |
| release.history | - | `[{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.7","date":"2026-09-02T07:23:55Z","type":"stable","version":"v1.5.7"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.7rc2","date":"2026-08-19T07:01:48Z","type":"stable","version":"v1.5.7rc2"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.7rc1","date":"2026-08-17T06:47:01Z","type":"prerelease","version":"v1.5.7rc1"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.6","date":"2026-08-06T08:29:47Z","type":"stable","version":"v1.5.6"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","date":"2026-07-31T12:07:29Z","type":"stable","version":"v1.5.5"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5rc1","date":"2026-07-13T19:33:37Z","type":"prerelease","version":"v1.5.5rc1"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4","date":"2026-06-24T10:24:01Z","type":"stable","version":"v1.5.4"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.3","date":"2026-06-14T06:21:33Z","type":"stable","version":"v1.5.3"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.2","date":"2026-06-11T06:14:51Z","type":"stable","version":"v1.5.2"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.1","date":"2026-06-09T08:32:30Z","type":"stable","version":"v1.5.1"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.0","date":"2026-06-03T01:54:09Z","type":"stable","version":"v1.5.0"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.0rc3","date":"2026-05-26T09:27:02Z","type":"prerelease","version":"v1.5.0rc3"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.16","date":"2026-05-07T19:34:01Z","type":"stable","version":"v1.4.16"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.15","date":"2026-04-19T08:40:25Z","type":"stable","version":"v1.4.15"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.14","date":"2026-04-12T20:43:18Z","type":"stable","version":"v1.4.14"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.13","date":"2026-04-02T17:00:24Z","type":"stable","version":"v1.4.13"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.12","date":"2026-03-27T05:52:31Z","type":"stable","version":"v1.4.12"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.11","date":"2026-03-20T08:41:06Z","type":"stable","version":"v1.4.11"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.11rc2","date":"2026-03-13T06:19:07Z","type":"stable","version":"v1.4.11rc2"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.4.10","date":"2026-02-27T07:39:59Z","type":"stable","version":"v1.4.10"}]` |
| security.disclosure_policy | - | yes |
| security.trust_center | - | https://github.com/HKUDS/LightRAG/security |
| security.vulnerabilities | - | `{"count":10,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=lightrag-hku&per_page=100","last_12m":9,"max_severity":"CRITICAL"}` |

## Capabilities (RAG Tools)

| Capability | Google Vertex AI Search | LightRAG |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Hybrid retrieval | - | ✓ |
| Reranking integration | - | ✓ |
| Multi hop agentic retrieval | - | ✗ |
| Embedding provider agnostic | - | ✓ |
| LLM provider agnostic | ✓ | ✓ |
| Built in rag eval metrics | - | - |
| Citation attribution | - | ✓ |
| Multimodal rag | ✓ | ✓ |
| Managed ingestion pipeline | ✓ | ✓ |
| Open source | - | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T02:36:09.349Z. "-" = undocumented, not absent.*