Infinity (InfiniFlow)
activeby InfiniFlow · since 2024 · also known as Infinity, InfiniFlow Infinity
AI-native C++ database for hybrid search over dense, sparse, multi-vector (tensor) and full text.
Overview
Infinity is an open-source database from InfiniFlow, the team behind the RAGFlow RAG engine, built specifically for retrieval in LLM applications. It stores tables with dense vectors, sparse vectors, tensors for late-interaction (ColBERT-style) ranking and full-text fields, and fuses them in one query with reciprocal-rank or weighted fusion and re-ranking. It runs as a server or embedded in Python and is written in modern C++20. A capable engine for advanced hybrid RAG, though its ecosystem and track record outside RAGFlow are still small.
Strengths & trade-offs
Strengths
- +Dense, sparse, tensor and full-text search fused in one query
- +Native late-interaction (ColBERT) tensor reranking
- +Embedded Python mode
- +Proven as the retrieval layer behind RAGFlow
Trade-offs
- −Pre-1.0 with breaking changes
- −Python is the only first-class SDK
- −Limited distributed/HA story
- −Small community outside the RAGFlow user base
Great for
- +Advanced hybrid RAG retrieval
- +RAGFlow deployments
- +Experimenting with ColBERT-style multi-vector ranking
Think twice for
- −Large multi-node production clusters
- −Non-Python stacks
- −Transactional workloads
Capabilities
Native or official first-party support · 5 of 25 tracked
Scale & consistency
- Comfortable data size
- Medium · ≤ 10 TB
- Horizontal scaling
- None
- Multi-region
- No
- Transactions
- Limited ACID
- Consistency
- Strong
- Schema
- Strict
- Architecture
- Single node, Embedded, Client server
- Query languages
- Infinity Python API, HTTP API
Single-node server or embedded; cluster mode is still maturing.
Deployment
Ecosystem
Alternatives to Infinity (InfiniFlow)
Big-data serving engine for search, recommendation and RAG with tensors and ML ranking.
infinity vs vespa →Cloud-native, distributed open-source vector database built for billions of vectors.
infinity vs milvus →Rust vector search engine with rich payload filtering, quantization and a managed cloud.
infinity vs qdrant →Lucene-based distributed search and analytics engine for text, vectors, logs and metrics.
infinity vs elasticsearch →Open-source AI-native vector database with hybrid search, modules for embeddings and multi-tenancy.
infinity vs weaviate →Fully managed Milvus from its creators, with serverless, dedicated and BYOC deployments.
infinity vs zilliz-cloud →Infinity (InfiniFlow) FAQ
What is Infinity (InfiniFlow)?
Infinity (InfiniFlow) is a vector database by InfiniFlow, first released in 2024. Infinity is an open-source database from InfiniFlow, the team behind the RAGFlow RAG engine, built specifically for retrieval in LLM applications. It stores tables with dense vectors, sparse vectors, tensors for late-interaction (ColBERT-style) ranking and full-text fields, and fuses them in one query with reciprocal-rank or weighted fusion and re-ranking. It runs as a server or embedded in Python and is written in modern C++20. A capable engine for advanced hybrid RAG, though its ecosystem and track record outside RAGFlow are still small.
Is Infinity (InfiniFlow) open source?
Yes. Infinity (InfiniFlow) is open source. License: Apache License 2.0.
Does Infinity (InfiniFlow) support ACID transactions?
Partly. Infinity (InfiniFlow) offers limited ACID guarantees (for example, single-record or single-partition transactions), with strong consistency.
Does Infinity (InfiniFlow) scale horizontally?
Infinity (InfiniFlow) does not scale horizontally; it runs on a single node, so you scale it up rather than out. It is comfortable at medium scale (≤ 10 TB).
How can I run Infinity (InfiniFlow)?
You can self-host it and embed it in your application.
What is Infinity (InfiniFlow) best for?
Infinity (InfiniFlow) is a strong fit for advanced hybrid RAG retrieval, RAGFlow deployments and experimenting with ColBERT-style multi-vector ranking. Think twice for large multi-node production clusters.
What are the best alternatives to Infinity (InfiniFlow)?
Common alternatives to Infinity (InfiniFlow) include Vespa, Milvus, Qdrant, Elasticsearch and Weaviate. The right choice depends on your workload, scale and hosting; WhichDB's smart match ranks them against your requirements.
How popular is Infinity (InfiniFlow)?
Infinity (InfiniFlow) ranks #235 of 844 databases on the WhichDB Score (14.3/100), and #16 among vector databases. The score combines public adoption signals such as package downloads, GitHub activity, job posts and developer discussion.