Multi-Vault Navigator for Obsidian: startup idea with real demand

Multi-Vault Navigator for Obsidian is a startup idea for Obsidian users. Obsidian users want to register several vault directories and see them in one explorer instead of switching between completely separate windows. A thread in r/ObsidianMD drew 130 upvotes and 52 comments between Sep 14, 2026 – Oct 14, 2026. People get by with switching windows and Symlinks, and that still leaves this job open. Hotness is 2.75, Simmering. Mild annoyance. Price-sensitive audience. The thread drew 130 upvotes and 52 comments. Gaps in existing tools. A few weeks of work. A first version is a moderate amount of work, about 3–4 weeks, priced between $10 and $49 a month and charged as a one-time purchase. The pain, the source, the alternatives, the scope notes, and the questions on this page are free to read and free to build from. The agent starter prompt is the paid part. The first slice is on the page. One credit unlocks the rest, to paste into a coding agent, download as Markdown, or send as a private link.

Moderate 3–4 weeks MVP Plugin verified Oct 14, 2026

Verbatim quotes are added only after a manual check. Until then, the thread title is the excerpt. Exact post date and verbatim quotes pending enrichment.

Who has it

Obsidian users.

What people use now

Switching windows
Symlinks

A way through

A plugin/add-on that merges multiple vaults into one navigation and search interface while preserving separate sync and privacy.

MVP scope

Give Obsidian users a way to do this in one sitting: Browse and search several Obsidian vaults in one window while keeping their sync and privacy separate.
Persist the result and show it again after a reload.
State the empty case when there is nothing to show yet, with one next step.
Charge later with a one-time purchase, between $10 and $49 a month. The free path must finish the core job once.
Ship the plugin only. Leave Switching windows to keep the jobs they already do well.

How it could charge

One-time purchase · $10–49 a month · B2C · GLOBAL.

Hotness 2.75

3 of 5, Simmering. Mild annoyance. Price-sensitive audience. The thread drew 130 upvotes and 52 comments. Gaps in existing tools. A few weeks of work.

Why this score

Pain	2 / 5
Willingness to pay	2 / 5
Demand	3 / 5
Competition gap	3 / 5
Ease of build	3 / 5
Recency	5 / 5

Weights: pain 25%, willingness to pay 20%, demand 20%, gap 15%, ease 10%, recency 10%. Recency is recomputed every build. The source report’s 1–10 score is not shown.

Questions

Is this idea already taken?

People already use Switching windows, Symlinks. Those options do not do the job in the solution above. The idea is free to build. Nothing here is an exclusive claim.

How hard is a first version?

Moderate. A tight MVP is about 3 weeks (3–4 weeks), assuming the regulated or partner-gated parts are stubbed. The paid prompt turns that into tasks.

Who would pay, and how?

The audience is Obsidian users. Charge a one-time purchase, and test a price between $10 and $49 a month. Willingness to pay is one input to Hotness, not a promise that someone will buy.

Can I use the evidence?

Yes. Build the product. The thread title is a short excerpt with a link, not a quote we are putting in someone's mouth. Exact post dates and verbatim lines are added only after a manual check. Ideas are suggestions, not medical, legal, or financial advice.

Agent prompt

The first slice is public. The rest is fetched only after you unlock it, and it is not in this page’s HTML.

prd.md

# Agent starter prompt: Multi-Vault Navigator for Obsidian

You are a senior product engineer. Build only the product described in this document. If a detail is missing, choose the smallest option and write it down in the README. Do not invent a second product, a marketplace of marketplaces, or a growth hack.

## Product
Name: Multi-Vault Navigator for Obsidian
One line: Browse and search several Obsidian vaults in one window while keeping their sync and privacy separate.
Shape: Plugin
AI stance: No AI needed
Region for v1: Global
Hotness (context only, not a requirement): 2.75 (simmering). Mild annoyance; price-sensitive audience; thread engagement 130▲/52💬 (demand 3/5); gaps in existing tools; a few weeks of work.

## Problem
Obsidian users want to register several vault directories and see them in one explorer instead of switching between completely separate windows.

Who feels it: Obsidian users.

Unlock the rest with 1 credit.

If you want the operating plan rather than the build document, it lives on the sister site. Draft the business plan

Productivity & Notes3.75