open-second-brain vs Excalidraw Architect
open-second-brain is a plugin bundle for AI coding tools published by Open Second Brain contributors. Marketplaces we read that list it: 1 (Community GitHub marketplaces). Excalidraw Architect is an MCP server published by BV-Venky. Marketplaces we read that list it: 2 (Official MCP Registry, PyPI (MCP servers)). As of our marketplace pass on 2026-10-24. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  Excalidraw Architect | |
|---|---|---|
| Community marketplace itechmeat/open-second-brain | Listed Version: 1.93.0 Forks (GitHub): 63 Stars (GitHub): 493 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.2.2 Downloads/month (PyPI): 1 548 Downloads/week (PyPI): 419 Forks (GitHub): 10 Stars (GitHub): 160 Not marked · First seen |
| PyPI (MCP servers) | Not listed | Listed Version: 2.0.0 Downloads/month (PyPI): 1 548 Downloads/week (PyPI): 419 Forks (GitHub): 10 Stars (GitHub): 160 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | open-second-brain | Excalidraw Architect |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 493 (better) | 160 (worse) |
| Forks (GitHub) (differs) | 63 (better) | 10 (worse) |
| Last release (differs) | 2026-10-23 | Not published |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (excalidraw-architect-mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | 26 | Not published |
| Parts of the bundle (differs) | 17 | Not a bundle |
| Licence | MIT | MIT |
| Repository (differs) | github.com/itechmeat/open-second-brain | github.com/bv-venky/excalidraw-architect-mcp |
| Changes in the last 7 days (differs) | 4 | 0 |
| First seen (differs) | 2026-10-22 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
open-second-brain
Plugin-first second brain for AI agents and humans (Obsidian-compatible Markdown vaults).
Excalidraw Architect
Generate beautiful Excalidraw architecture diagrams with auto-layout and component styling
How to run each
open-second-brain As a Claude Code plugin
/plugin marketplace add itechmeat/open-second-brain
/plugin install open-second-brain@open-second-brainExcalidraw Architect As a local MCP server: PyPI package
claude mcp add --transport stdio excalidraw-architect-mcp -- uvx excalidraw-architect-mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: open-second-brain · What it can do: Excalidraw Architect · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the Python Package Index (pypi.org). Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.