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

185k

AI-nativeStands out for the most GitHub stars. Ollama has 185,075 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 1,263 commits in the last year; it replaces ChatGPT.

2

RAGFlow

Open-source RAG engine with deep document understanding.

AI & LLM ToolsDocker

93k

AI-nativeStands out for the most commits in the last 12 months (6,295). RAGFlow has 92,997 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 6,295 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 81,199 GitHub stars, uses the GPL-3.0 license, ships a Docker image, is written in Go and had 2,752 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

67k

Stands out for a permissive Apache-2.0 license. Prometheus has 66,825 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 2,795 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

Stands out for a permissive MIT license. Memos has 64,135 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 1,007 commits in the last year; it replaces Evernote and Google Keep.

6

frp

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

Proxy & VPNDocker

110k

frp has 110,229 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 192 commits in the last year; it replaces ngrok.

7

Traefik

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

Web Servers & Reverse ProxiesDocker

65k

Traefik has 65,398 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 920 commits in the last year.

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

59k

Gitea has 58,738 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 1,909 commits in the last year; it replaces GitHub and GitLab.

9

Caddy

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

Web Servers & Reverse ProxiesDocker

79k

Caddy has 78,501 GitHub stars, uses the Apache-2.0 license, ships a Docker image, is written in Go and had 406 commits in the last year.

10

Syncthing

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

File Sync & StorageDocker

90k

Syncthing has 89,827 GitHub stars, uses the MPL-2.0 license, ships a Docker image, is written in Go and had 244 commits in the last year; it replaces Google Drive and Dropbox.

11

LocalAI

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

AI & LLM ToolsDocker

50k

AI-nativeLocalAI has 50,019 GitHub stars, uses the MIT license, ships a Docker image, is written in Go and had 3,909 commits in the last year; it replaces ChatGPT.

12

Headscale

Open-source, self-hosted implementation of the Tailscale control server.

Proxy & VPNDocker

45k

Headscale has 45,129 GitHub stars, uses the BSD-3-Clause license, ships a Docker image, is written in Go and had 1,191 commits in the last year; it replaces Tailscale.