The way forward is Open

Open source software is freely available to use, lovingly made by people all over the world, and at the heart of our digital products.

Projects we use

Languages & runtimes

The typed, memory-safe foundations our services are written on.

TypeScript A strongly typed programming language that builds on JavaScript.

Apache-2.0

Tokio An asynchronous runtime for writing reliable network applications in Rust.

MIT

C# A modern, object-oriented, type-safe language for the .NET platform.

MIT

Node.js A JavaScript runtime built on Chrome's V8 engine.

MIT

Go An open source language for building simple, reliable and efficient software.

BSD-3-Clause

Rust A systems language focused on safety, speed and concurrency, with no garbage collector.

MIT / Apache-2.0

TypeScript A strongly typed programming language that builds on JavaScript.

Apache-2.0

Tokio An asynchronous runtime for writing reliable network applications in Rust.

MIT

C# A modern, object-oriented, type-safe language for the .NET platform.

MIT

Node.js A JavaScript runtime built on Chrome's V8 engine.

MIT

Go An open source language for building simple, reliable and efficient software.

BSD-3-Clause

Rust A systems language focused on safety, speed and concurrency, with no garbage collector.

MIT / Apache-2.0

Web & API frameworks

Server frameworks handling HTTP, routing and rendering.

SvelteKit A framework for building web applications of all sizes with Svelte.

MIT

Axum A web application framework for Rust built on Tokio, Tower and Hyper.

MIT

Hono A small, simple and ultrafast web framework built on Web Standards.

MIT

Fiber An Express-inspired web framework for Go, built on Fasthttp.

MIT

ASP.NET Core A cross-platform framework for building web apps and APIs with .NET.

MIT

SvelteKit A framework for building web applications of all sizes with Svelte.

MIT

Axum A web application framework for Rust built on Tokio, Tower and Hyper.

MIT

Hono A small, simple and ultrafast web framework built on Web Standards.

MIT

Fiber An Express-inspired web framework for Go, built on Fasthttp.

MIT

ASP.NET Core A cross-platform framework for building web apps and APIs with .NET.

MIT

Data & storage

Where records, caches and vector embeddings live.

PostgreSQL A powerful, open source object-relational database system.

PostgreSQL

MongoDB A document-oriented NoSQL database for JSON-like documents.

SSPL

Valkey An open source, in-memory key-value data store, forked from Redis.

BSD-3-Clause

Qdrant A vector database and similarity search engine for AI applications.

Apache-2.0

OpenSearch A distributed search and analytics suite, forked from Elasticsearch.

Apache-2.0

SQLite A self-contained, serverless, zero-configuration SQL database engine.

Public Domain

PostgreSQL A powerful, open source object-relational database system.

PostgreSQL

MongoDB A document-oriented NoSQL database for JSON-like documents.

SSPL

Valkey An open source, in-memory key-value data store, forked from Redis.

BSD-3-Clause

Qdrant A vector database and similarity search engine for AI applications.

Apache-2.0

OpenSearch A distributed search and analytics suite, forked from Elasticsearch.

Apache-2.0

SQLite A self-contained, serverless, zero-configuration SQL database engine.

Public Domain

Interface & build tooling

What we style, bundle and install with.

Tailwind CSS A utility-first CSS framework for rapidly building custom interfaces.

MIT

Vite A fast build tool and development server for modern web projects.

MIT

pnpm A fast, disk-space-efficient package manager for JavaScript.

MIT

Shiki A syntax highlighter using TextMate grammars and VS Code themes.

MIT

Chart.js A simple yet flexible JavaScript charting library.

MIT

Lucide A community-maintained open source icon library, forked from Feather.

ISC

Tailwind CSS A utility-first CSS framework for rapidly building custom interfaces.

MIT

Vite A fast build tool and development server for modern web projects.

MIT

pnpm A fast, disk-space-efficient package manager for JavaScript.

MIT

Shiki A syntax highlighter using TextMate grammars and VS Code themes.

MIT

Chart.js A simple yet flexible JavaScript charting library.

MIT

Lucide A community-maintained open source icon library, forked from Feather.

ISC

Insight & assurance

Self-hosted measurement and security testing.

Matomo An open source, self-hosted web analytics platform focused on privacy.

GPL-3.0

ZAP An open source web application security scanner from OWASP.

Apache-2.0

OpenTelemetry A vendor-neutral framework for generating and collecting telemetry data.

Apache-2.0

Trivy An open source scanner for vulnerabilities and misconfigurations.

Apache-2.0

Matomo An open source, self-hosted web analytics platform focused on privacy.

GPL-3.0

ZAP An open source web application security scanner from OWASP.

Apache-2.0

OpenTelemetry A vendor-neutral framework for generating and collecting telemetry data.

Apache-2.0

Trivy An open source scanner for vulnerabilities and misconfigurations.

Apache-2.0

Attribution

Every project listed here is maintained by its own community under its own open source licence. We use them as published, and we are grateful to the maintainers.