Best open source apps written in Go

1

Ollama

Get up and running with Llama 3.3, DeepSeek-R1, Phi-4, Gemma 3, and other large language models.

AI & LLM ToolsDocker

182k

AI-nativeOllama has 182,289 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 1,083 commits in the last year; it replaces ChatGPT.

2

RAGFlow

Open-source RAG engine with deep document understanding.

AI & LLM ToolsDocker

92k

AI-nativeRAGFlow has 91,708 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 5,821 commits in the last year.

3

Netdata

Real-time infrastructure monitoring with per-second metrics and zero-config dashboards.

Monitoring & Status PagesDocker

81k

Netdata has 80,804 GitHub stars, uses the GPL-3.0 license, ships a Docker image, is written in Go and had 2,609 commits in the last year; it replaces Datadog and Pingdom.

4

Prometheus

Metrics-based monitoring and alerting toolkit with a powerful query language, built for cloud-native systems.

Monitoring & Status PagesDocker

66k

Prometheus has 66,381 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 2,592 commits in the last year; it replaces Datadog and Grafana Cloud.

5

Memos

Knowledge base that works with a SQLite db file.

Note-taking & EditorsDocker

64k

Memos has 63,545 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 928 commits in the last year; it replaces Evernote and Google Keep.

6

Traefik

HTTP reverse proxy and load balancer that makes deploying microservices easy.

Web Servers & Reverse ProxiesDocker

65k

Traefik has 65,081 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 846 commits in the last year; it replaces ngrok.

7

frp

Fast reverse proxy that exposes local servers behind NAT to the internet.

Proxy & VPNDocker

110k

frp has 109,755 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 165 commits in the last year; it replaces ngrok.

8

Gitea

Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD.

Project ManagementDocker

58k

Gitea has 58,319 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 1,696 commits in the last year; it replaces GitHub and GitLab.

9

Syncthing

Syncthing is an open source peer-to-peer file synchronisation tool.

File Sync & StorageDocker

89k

Syncthing has 89,175 GitHub stars, uses the MPL-2.0 license, ships a Docker image, is written in Go and had 223 commits in the last year; it replaces Google Drive and Dropbox.

10

Caddy

Powerful, enterprise-ready, open source web server with automatic HTTPS.

Web Servers & Reverse ProxiesDocker

77k

Caddy has 77,243 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 331 commits in the last year; it replaces Netlify.

11

LocalAI

Run your AI models locally and generate images and audio (alternative to OpenAI and Claude).

AI & LLM ToolsDocker

49k

AI-nativeLocalAI has 49,405 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 3,438 commits in the last year; it replaces ChatGPT.

12

PocketBase

Backend for your next SaaS and Mobile app in one file.

Low-code & BackendDocker

61k

PocketBase has 61,293 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 500 commits in the last year; it replaces Firebase and Supabase.