Alternatives to Arcana

Specialized embedding models and rerankers for high-accuracy enterprise RAG, with 32K-token context and multimodal support.

Open-source text embeddings plus agentic AEC workflows for drawing review and code compliance

Train and use ColBERT late-interaction retrieval models in any RAG pipeline

Fully managed vector database and knowledge platform for agentic AI retrieval

Multimodal video search API that finds any timestamped scene by description in your object storage.

Cohere delivers sovereign enterprise AI — generative, search, and speech models you deploy inside your own VPC, on-prem, or in Model Vault.

Open-source RAG engine that turns messy documents into a trustworthy context layer for AI agents, with ETL, hybrid search and agentic retrieval.

Open-source vector database for billion-scale AI similarity search and RAG

Open-source AI database unifying vector search, RAG, embeddings, and managed agent memory in one platform.

Multimodal retrieval API that gives AI agents evidence, not just search results

Open-source knowledge-graph RAG that maps entities and communities to answer complex, cross-document questions.

Vespa is a distributed AI search platform unifying vector, text, and ML ranking at scale.

AI-native hybrid search API for RAG, recommendations, and relevance tuning.

Open-source multimodal lakehouse for AI data curation, feature engineering, search, and training.

Cohere Rerank 4 is a cross-attention semantic reranking model that sharpens retrieval for RAG pipelines and AI agents.

Qdrant is an open-source vector database for production-grade semantic search, hybrid retrieval, and AI agent memory.

pgvector adds open-source vector similarity search to Postgres so you can store embeddings next to your relational data.

Vespa AI is an open-source search platform that unifies vector, text, and ML ranking at scale.

Fully managed vector lakebase for billion-scale AI search, RAG, and recommendations.

Open-source, serverless vector search built on object storage that claims up to 10x lower cost.

Vector & full-text search on object storage: 10x cheaper, petabyte-scale, sub-10ms p50

Open-source distributed SQL database with vector search, ACID transactions, and HTAP for AI agent workloads.

Open-source real-time SQL analytics, full-text search, and vector database for AI.

Open-source graph memory for AI agents with persistent, relationship-aware recall

Real-time semantic search for voice AI agents, copilots, and real-time apps—under 10ms, no vector DB required.

Serverless Postgres with branching, autoscaling, and integrated backends for apps and agents

Mnemosyne gives AI agents a local-first memory layer with sub-millisecond SQLite recall.

5-line RAG framework for Python developers integrating GenAI into apps

In-memory graph database for real-time GraphRAG and AI memory

Scalable memory infrastructure for AI agents with millisecond recall