The best obsidian-second-brain alternatives

llm-wiki-agent

SamurAIGPT/llm-wiki-agent

A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads them, extracts knowledge, and maintains a persistent interlinked wiki. Works with Claude Code, Codex, OpenCode, Gemini CLI. No API key needed.

Choose llm-wiki-agent if…

• you specifically need ai-agent or ai-tools

Shares claude-code, knowledge-graph, note-taking, obsidian with obsidian-second-brain.

agents

wshobson/agents

Multi-harness agentic plugin marketplace for Claude Code, Codex, Cursor, OpenCode, GitHub Copilot, and Google Antigravity

Choose agents if…

• you want the more widely starred option (42.1k)
• you specifically need agentic-ai or agents

Shares agent-skills, ai-agents, anthropic, claude with obsidian-second-brain.

claude-obsidian

AgriciDaniel/claude-obsidian

Self-organizing AI second brain for Obsidian + Claude Code. Drop any source and Claude reads, links, and files it into one connected knowledge graph of plain Markdown you own. AI note-taking, personal knowledge management (PKM), and an open-source Notion alternative. Based on Karpathy's LLM Wiki pattern.

Choose claude-obsidian if…

• you want the more widely starred option (16.1k)
• you specifically need claude-code-skill or claude-memory

Shares agent-skills, ai-note-taking, ai-second-brain, claude-code with obsidian-second-brain.

linkedin-mcp-server

stickerdaniel/linkedin-mcp-server

Open-source MCP server for LinkedIn. Give Claude and any MCP-compatible AI agent access to profiles, companies, jobs, and messages.

Choose linkedin-mcp-server if…

• Apache License 2.0 suits your use better than MIT License
• you specifically need chatgpt or chatgpt-desktop

Shares ai-agents, anthropic, claude, claude-code with obsidian-second-brain.

Claude-Code-Everything-You-Need-to-Know

wesammustafa/Claude-Code-Everything-You-Need-to-Know

A practical Claude Code guide with clear mental models and copy-paste examples — setup, prompt engineering, slash commands, skills, hooks, subagents, agent teams, and MCP servers. Beginner path to power-user depth. Featured in Awesome Claude Code.

Choose Claude-Code-Everything-You-Need-to-Know if…

• you specifically need agentic-coding or anthropic-claude

Shares agent-skills, ai-agents, anthropic, claude with obsidian-second-brain.

hermes-agent

NousResearch/hermes-agent

The agent that grows with you

Choose hermes-agent if…

• you want the more widely starred option (260.1k)
• you specifically need ai or ai-agent

Shares ai-agents, anthropic, claude, claude-code with obsidian-second-brain.

khazix-skills

KKKKhazix/khazix-skills

数字生命卡兹克开源的 AI Skills 合集 | Agent Skills: leader（帮你定义目标）, neat-freak 洁癖, hv-analysis, khazix-writer & more — Claude Code, Codex & 40+ agents

Choose khazix-skills if…

• you want the more widely starred option (21.9k)
• you specifically need codex or developer-tools

Shares agent-skills, ai-agents, claude, claude-code with obsidian-second-brain.

html-anything

nexu-io/html-anything

✨ The agentic HTML editor — your local AI agent writes the HTML, you ship it. 🚀 75 Skills × 9 Surfaces (magazine · deck · poster · XHS / tweet · prototype · data report · Hyperframes) 🛡️ Sandboxed preview · 📤 1-click to WeChat / X / Zhihu / HTML / PNG 🔑 Zero API key — Claude Code / Cursor / Codex / Gemini / Copilot / OpenCode / Qwen / Aider.

Choose html-anything if…

• you would rather work in HTML than Python
• Apache License 2.0 suits your use better than MIT License
• you want the more widely starred option (9.4k)
• you specifically need agentic or ai-design

Shares agent-skills, ai-agents, claude, claude-code with obsidian-second-brain.

ponytail

DietrichGebert/ponytail

Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

Choose ponytail if…

• you would rather work in JavaScript than Python
• you want the more widely starred option (183.4k)
• you specifically need claude-code-plugin or cursor-rules

Shares agent-skills, ai-agents, claude, claude-code with obsidian-second-brain.

claude-mem

thedotmack/claude-mem

Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More

Choose claude-mem if…

• you would rather work in TypeScript than Python
• Apache License 2.0 suits your use better than MIT License
• you want the more widely starred option (111.4k)
• you specifically need ai or ai-memory

Shares ai-agents, anthropic, claude, claude-code with obsidian-second-brain.

book-to-skill

virgiliojr94/book-to-skill

Turn any technical book PDF into a Claude Code skill — ready to study, reference, and use while you work.

Choose book-to-skill if…

• you want the more widely starred option (36.8k)
• you specifically need book-to-skill or context-engineering

Shares agent-skills, ai-agents, knowledge-management with obsidian-second-brain.

Graft

trailhq/Graft

Turbocharge Claude Code, Cursor, Codex, Gemini & every coding agent: faster, cheaper, with contextual understanding specific to your codebase.

Choose Graft if…

• you would rather work in TypeScript than Python
• you want the more widely starred option (11.1k)
• you specifically need cli or code-graph

Shares ai-agents, anthropic, claude-code, knowledge-graph with obsidian-second-brain.