Auto Ontology is a Python framework for building semantic, graph-based reasoning layers over data. It enables deterministic query generation, better context retrieval, and more explainable AI for LLM and agent workflows.
High-performance AI pipeline engine with a C++ core and 50+ Python-extensible nodes. Build, debug, and scale LLM workflows with 13+ model providers, 8+ vector databases, and agent orchestration, all from your IDE. Includes VS Code extension, TypeScript/Python SDKs, and Docker deployment.
π PageIndex: Document Index for Vectorless, Reasoning-based RAG
Build Real-Time Knowledge Graphs for AI Agents
Connect your company's data, let an agent draft an ontology over it, and load it into HelixDB as one graph you can explore and ask questions of. Hosted at foundry.helix-db.com, or run it on your own machine.
For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.
Data Engineering Zoomcamp is a free 9-week course on building production-ready data pipelines. Join the course here ππΌ
[EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation
Graph-Native Infrastructure for Context and Accountable AI Systems
Free and Open Source, Distributed, RESTful Search Engine
Apache Kafka - A distributed event streaming platform
Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search
A Postgres Compatible Database for Heavy, Multi-Tenant Workloads
The financial transactions database designed for mission critical safety and performance.
TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.
The data transformation tool the open-source community deserves.
A library that provides an embeddable, persistent key-value store for fast storage.
OpenTenBase is an enterprise-level distributed HTAP open source database.
Apache Druid: a high performance real-time analytics database.
Human-AI Collaborative Data Science Using Visual Workflows
An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
HeavyDB (formerly MapD/OmniSciDB)
An immutable SQL database for application development, time-travel reporting and data compliance. Developed by @juxt
Deep memory for agents over large datasets. Leviathan is a single static binary that turns your records (JSONL, JSON, CSV/TSV, SQLite, or anything a database CLI can export) into a ranked full-text index.
ZIO β A type-safe, composable library for async and concurrent programming in Scala
Product images for the Stackable Data Platform