Open-source startup atlas

OSSEAN

601 startups indexed
Snapshot refreshed Mar 25, 2026

Curated, then kept alive

The directory for open-source startups that still ship.

OSSEAN now combines a fast checked-in startup snapshot with cached live GitHub repo data on featured cards and detail pages. Browse quickly, then drop into the pulse of the repos that matter.

Directory
601
handpicked startup repos
Stars
16M
combined across tracked repos
Forks
2.1M
signals of real adoption
Languages
36
ecosystems represented

Stay Close

Get new companies and sync notes without the noise.

I'll only use this for meaningful directory updates, launches, and notable additions to the open-source startup landscape.

Email capture works when the Redis-backed KV env vars are configured.

Search fast

Directory cards stay snappy.

The explorer hydrates from the local snapshot, so search and filtering stay instant instead of waiting on hundreds of live API requests.

Check live state

Featured repos and detail pages sync with GitHub.

High-value surfaces fetch cached live stats so you can tell what moved since the last saved data refresh.

Sync lightly

Full re-ingestion stays optional.

You can still refresh the whole directory with the existing sync script, but the site no longer feels frozen if that job runs less often.

Most represented languages

TypeScript155 projects
Go89 projects
Python88 projects
JavaScript56 projects
Java33 projects
Rust25 projects

Common topics

#hacktoberfest · 87#self-hosted · 60#javascript · 60#typescript · 58#python · 56#ai · 52#docker · 50#react · 48#golang · 42#llm · 41#open-source · 34#go · 33

Current state

The app is no longer just a static hero plus list. It now has a normalized data layer, live GitHub sync endpoints, a searchable explorer, and richer detail pages.

The snapshot is still the backbone, which keeps browsing reliable on Vercel and Cloudflare. Live fetches are targeted instead of all-or-nothing.

Directory Explorer

Search the ocean, then narrow it fast.

Find projects by name, org, language, or topic. Cards use the checked-in directory snapshot, while repo pages layer on live GitHub data.

601 projects match your filters
Significant-Gravitas

AutoGPT

Significant-Gravitas/AutoGPT

182.8K stars

AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters.

Python#ai#artificial-intelligence#autonomous-agentsagpt.co
Forks
46.2K
Issues
375
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
n8n-io

n8n

n8n-io/n8n

181K stars

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

TypeScript#ai#apis#automationn8n.io
Forks
56.1K
Issues
1.4K
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
DigitalPlatDev

FreeDomain

DigitalPlatDev/FreeDomain

154.2K stars

DigitalPlat FreeDomain: Free Domain For Everyone

HTML#digitalplat#domain#domain-platformdomain.digitalplat.org
Forks
2.6K
Issues
32
Snapshot
3 hours ago
Pushed 6 days agoOpen repo profile
langflow-ai

langflow

langflow-ai/langflow

146.2K stars

Langflow is a powerful tool for building and deploying AI-powered agents and workflows.

Python#agents#chatgpt#generative-ailangflow.org
Forks
8.7K
Issues
914
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
langgenius

dify

langgenius/dify

134.4K stars

Production-ready platform for agentic workflow development.

TypeScript#agent#agentic-ai#agentic-frameworkdify.ai
Forks
20.9K
Issues
793
Snapshot
3 hours ago
Pushed 4 hours agoOpen repo profile
anomalyco

opencode

anomalyco/opencode

130.2K stars

The open source coding agent.

TypeScriptopencode.ai
Forks
13.8K
Issues
6.8K
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
open-webui

open-webui

open-webui/open-webui

128.6K stars

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Python#ai#llm#llm-uiopenwebui.com
Forks
18.2K
Issues
238
Snapshot
3 hours ago
Pushed 8 hours agoOpen repo profile
excalidraw

excalidraw

excalidraw/excalidraw

119.5K stars

Virtual whiteboard for sketching hand-drawn like diagrams

TypeScript#canvas#collaboration#diagramsexcalidraw.com
Forks
13K
Issues
2.9K
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
rustdesk

rustdesk

rustdesk/rustdesk

110K stars

An open-source remote desktop application designed for self-hosting, as an alternative to TeamViewer.

Rust#android#anydesk#dartrustdesk.com
Forks
16.4K
Issues
107
Snapshot
3 hours ago
Pushed 10 hours agoOpen repo profile
supabase

supabase

supabase/supabase

99.6K stars

The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

TypeScript#ai#alternative#authsupabase.com
Forks
11.9K
Issues
955
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
firecrawl

firecrawl

firecrawl/firecrawl

98.1K stars

🔥 The Web Data API for AI - Turn entire websites into LLM-ready markdown or structured data

TypeScript#ai#ai-agents#ai-crawlerfirecrawl.dev
Forks
6.6K
Issues
237
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
immich-app

immich

immich-app/immich

95.7K stars

High performance self-hosted photo and video management solution.

TypeScript#backup-tool#flutter#google-photosimmich.app
Forks
5.2K
Issues
702
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
ChatGPTNextWeb

NextChat

ChatGPTNextWeb/NextChat

87.6K stars

✨ Light and Fast AI Assistant. Support: Web | iOS | MacOS | Android | Linux | Windows

TypeScript#calclaude#chatgpt#claudenextchat.club
Forks
60.1K
Issues
796
Snapshot
3 hours ago
Pushed 4 months agoOpen repo profile
home-assistant

core

home-assistant/core

85.8K stars

:house_with_garden: Open source home automation that puts local control and privacy first.

Python#asyncio#hacktoberfest#home-automationhome-assistant.io
Forks
37.1K
Issues
3.5K
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
louislam

uptime-kuma

louislam/uptime-kuma

84.5K stars

A fancy self-hosted monitoring tool

JavaScript#docker#monitor#monitoringuptime.kuma.pet
Forks
7.6K
Issues
707
Snapshot
3 hours ago
Pushed 18 hours agoOpen repo profile
browser-use

browser-use

browser-use/browser-use

84.4K stars

🌐 Make websites accessible for AI agents. Automate tasks online with ease.

Python#ai-agents#ai-tools#browser-automationbrowser-use.com
Forks
9.8K
Issues
222
Snapshot
3 hours ago
Pushed 13 hours agoOpen repo profile
hoppscotch

hoppscotch

hoppscotch/hoppscotch

78.6K stars

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

TypeScript#api#api-client#api-resthoppscotch.io
Forks
5.7K
Issues
733
Snapshot
3 hours ago
Pushed 3 hours agoOpen repo profile
netdata

netdata

netdata/netdata

78.2K stars

The fastest path to AI-powered full stack observability, even for lean teams.

C#ai#alerting#cncfnetdata.cloud
Forks
6.4K
Issues
255
Snapshot
3 hours ago
Pushed 18 hours agoOpen repo profile