Freemium
Kong
Open SourceWeb Servers & Proxies · DevOps
Popular open-source API gateway and microservices management.
api-gatewayproxyplugins
Browse the complete directory — use filters to narrow down.
Web Servers & Proxies · DevOps
Popular open-source API gateway and microservices management.
Agent & LLM Frameworks · AI for Developers
Open-source LLM observability: traces, evals and prompt management.
Models & LLM APIs · AI for Developers
Open-source, multi-provider chat UI with agents and artifacts.
Models & LLM APIs · AI for Developers
Open-source AI chat framework with plugins and agent marketplace.
Authentication · API Tools
Open-source auth infrastructure with a beautiful admin console — OIDC/OAuth, SSO and user management, self-hostable.
Email · API Tools
Self-hosted email testing tool with a web UI, catches local mail.
Search Engines · Database
Fast, typo-tolerant search engine with great defaults (trending).
Dashboards & BI · Data & Analytics
Open-source BI tool for dashboards and self-serve queries.
Vector Databases · AI for Developers
Highly scalable open-source vector database for billion-scale search.
Object Storage · Database
High-performance S3-compatible object storage, self-hostable.
NoSQL · Database
Popular document-oriented NoSQL database with a flexible schema.
Agent & LLM Frameworks · AI for Developers
Fair-code workflow automation with native AI agent nodes.
Models & LLM APIs · AI for Developers
Self-hosted ChatGPT-style UI for Ollama and OpenAI-compatible APIs.
Design Tools · Design & Prototyping
Open-source design and prototyping platform, SVG-native.
Web Analytics · Monitoring & Observability
Lightweight, privacy-friendly open-source web analytics.
Serverless & BaaS · Database
Open-source backend in one file: SQLite database, auth, realtime and files.
Payments · API Tools
Open-source payments and monetization for developers — checkouts, subscriptions and license keys, MoR model.
Vector Databases · AI for Developers
Open-source vector database written in Rust, with cloud offering.
APM & Tracing · Monitoring & Observability
Open-source Datadog alternative built on OpenTelemetry.
PDF Tools · PDF & Documents
Self-hosted PDF toolbox with 50+ operations, locally run.
Headless CMS · Backend
The most popular open-source headless CMS, self-hostable.
AI Coding Assistants · AI for Developers
Self-hosted AI coding assistant — code completion on your own hardware with your own models, no data leaves.
Queues & Streaming · Database
Durable workflow execution engine — write workflows as code and Temporal handles retries, state and failures.
Search Engines · Database
Open-source, in-memory search engine focused on developer experience.