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.
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An open-source engine that turns continuous content streams into search and monitoring. Durable ingestion, hybrid search, alerts, and plugins for formats, models and business rules.
The open-source database for the realtime web.
Open-source vector similarity search for Postgres
- nearest-neighbor-search
- approximate-nearest-neighbor-search
📊 Cube Core is open-source semantic layer for AI, BI and embedded analytics
QuestDB is a high performance, open-source, time-series database
- time-series
- low-latency
- database
- sql
Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database.
- search-engine
- semantic-search
- semantic-search-engine
- vector-search
A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.
- full-stack
- open-source
- saas
- nodejs
The Open Source DocuSign Alternative.
- document-signing
- next-auth
- nextjs
- open-source
An open-source graph database
- graph
- graph-database
- cayley
- go
Next-generation full-text search library for Browser and Node.js
- search
- search-algorithm
- search-engine
- searching-algorithms
Open-source, self-hosted alerting for metrics, logs, and databases. Includes a built-in AI agent and MCP server.
- monitoring
- time-series
- nightingale
- tsdb
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
The all-in-one, open-source backend platform for agentic coding. InsForge gives your coding agent database, auth, storage, compute, hosting, and AI gateway to ship full-stack apps end-to-end.
The open-source reactive database for app developers
A distributed, fast open-source graph database featuring horizontal scalability and high availability
Open-source search database for full-text, vector, and hybrid search with real-time indexing and SQL.
- search-engine
- search
- mysql
- sphinxsearch
Cloud-native OSS search engine for observability
- rust
- log-management
- logs
- tantivy
An open-source, self-hosted personal AI note tool prioritizing privacy, built using TypeScript .
open source training courses about distributed database and distributed systems
- distributed-systems
- rust
- golang
- talent-plan
Open-source, low-latency key/value engine built on Valkey with query subscriptions and hierarchical storage tiers.
Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics
OceanBase is the unified distributed database for the AI era — open-source, multi-model, one engine for your most demanding workloads.
- oceanbase
- paxos
- htap
- cloud-native
ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.
- ecommerce
- shopping-cart
- asp-net
- asp-net-core