How VibeSandbox works

A marketplace where every AI app is scored by AI — not by follower count or marketing budget. Builders list, AI judges, buyers discover.

01
Submit your app

Sign up and list your AI-powered app with a title, URL, description, and price. Free to list. Takes under 2 minutes.

02
AI scores it automatically

Our AI fetches your app's metadata, takes a screenshot, and scores it across 5 dimensions — problem clarity, UX quality, monetization, market opportunity, and defensibility. Score arrives within 5 minutes.

03
Buyers discover you

Your listing appears in the public feed, sorted by AI score. Buyers browse, filter by category and price, and read the AI critique to decide if your app fits their needs.

ProductivityWritingCodeDesignResearchHealthEducationFinanceMarketingSocialOther
04
Connect directly, no middleman

Interested buyers send you a message through our encrypted relay. You get their email directly — so you can reply and close the deal off-platform. No fees, no payment processing.

The scoring rubric

Every listing is evaluated by AI across 5 dimensions. Final score (0–100) = weighted average × 10. Most apps land between 40–75. 80+ is rare — calibrated hard to keep the bar meaningful.

25%Problem ClarityDoes it solve a specific, real problem for a clear audience?
0–3Vague

Me-too problem with no clear audience

4–6Specific

Real problem, but fuzzy on who suffers

7–10Nailed it

One sentence that names who suffers and why

20%UX QualityCan someone understand what it does in 10 seconds and try it with zero friction?
0–3Confusing

Can't figure out what it does in 30 seconds

4–6Workable

Understandable but clunky to get started

7–10Frictionless

Clear in 10s, instant path to value

20%MonetizationIs there a clear revenue model and a proven or obvious path to cashflow?
0–3None

No pricing, no revenue path visible

4–6Unclear

Some monetization but model is ambiguous

7–10Clear

Visible pricing, proven or obvious path to cashflow

20%Market OpportunityIs the addressable market large or growing enough to be worth acquiring?
0–3Tiny

Niche or shrinking market

4–6Real

Solid market but crowded with no clear wedge

7–10Large

Large or fast-growing market with room to capture share

15%DefensibilityDoes it have a moat — proprietary data, switching costs, or unique distribution?
0–3None

Trivial to replicate in a weekend

4–6Weak

Some moat but copyable with resources

7–10Strong

Proprietary data, switching costs, or unique distribution

Calibration examples

38/100Low

"Chat with your documents" — generic problem, no pricing, crowded market, trivial to replicate.

Problem 4/10UX 3/10Revenue 2/10Market 4/10Moat 3/10
62/100Mid

Standup bot pulling from Jira/GitHub. Clear SaaS pricing, solid market, but easily copied.

Problem 7/10UX 6/10Revenue 6/10Market 7/10Moat 5/10
84/100High

Email assistant trained on your writing style. $49/mo pricing, data moat that grows over time.

Problem 9/10UX 8/10Revenue 8/10Market 7/10Moat 8/10

FAQ

How much does it cost to list?

Free. There are no listing fees and no commission. VibeSandbox facilitates the introduction — the deal happens between you and the buyer.

Who can see my listing?

Everyone. The feed is fully public — no account needed to browse. This means your listing gets maximum exposure from day one.

What if my score feels wrong?

Scores are based on what the AI can evaluate from your URL, metadata, and description. A strong pitch with clear pricing and a well-defined target market improves your Monetization and Market Opportunity scores significantly.

How does the email relay work?

Buyer messages are forwarded once to your email address. The buyer's email is included so you can reply directly. We never store conversations and the relay token expires after 24 hours.

Can I edit my listing after submitting?

Yes. You can edit the title, description, category, and price at any time from your listing page.

How many apps can I list?

Up to 3 per week. This keeps the feed high-quality and prevents spam.

Ready to list your app?

Free to submit. AI score in under 5 minutes.

Browse the feed →