ontomics vs Serena

A side-by-side comparison of two Developer Tools servers — tools, transport, auth, maintenance, and copy-paste config for each.

	ontomics Give any coding agent instant semantic knowledge of your codebase — one tool call instead of 19, ~20x fewer tokens. Unverified stdio (local) No auth Rust	Serena LSP-powered coding agent toolkit: semantic symbol search, references and structural edits. Verified stdio (local) No auth Python
Category	Developer Tools	Developer Tools
Language	Rust	Python
Transport	stdio (local)	stdio (local)
Auth	None	None
GitHub stars	36	12k
Last commit	2 months ago	23 days ago
Verified
Actively maintained
Install	`npm install -g @ontomics/ontomics`	`uvx --from git+https://github.com/oraios/serena serena start-mcp-server`
Repo	Open	Open

Verdict

Pick ontomics if you need the broadest set of tools.

Pick Serena if you prefer the more popular, battle-tested option, and you want a verified, documented setup.

Add ontomics

Install / run

npm install -g @ontomics/ontomics

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ontomics": {
      "command": "npx",
      "args": [
        "-y",
        "@ontomics/ontomics",
        "--repo",
        "."
      ]
    }
  }
}

Add Serena

Install / run

uvx --from git+https://github.com/oraios/serena serena start-mcp-server

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "serena": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/oraios/serena",
        "serena",
        "start-mcp-server"
      ]
    }
  }
}

Requires `uv` (the Python package runner). Install it from https://docs.astral.sh/uv/ if `uvx` is not found.

FAQ

ontomics or Serena — which is better?

Pick ontomics if you need the broadest set of tools. Pick Serena if you prefer the more popular, battle-tested option, and you want a verified, documented setup.

Can I use both ontomics and Serena?

Yes — MCP clients let you enable multiple servers at once. Add both configs to your client's mcpServers and use whichever tool fits the task.

Do ontomics and Serena work with Claude, Cursor and Windsurf?

Both do. Copy the per-client config below into Claude Desktop, Cursor, or Windsurf.

View ontomics →View Serena →More comparisons →