New startup ideas · Consumer and commerce · Consumer
startup idea
Listwire
One API that lists any secondhand item everywhere and prices it from real comps.
Small resellers and secondhand shops connect once to Listwire and their inventory appears, correctly categorised and priced, across every consumer resale marketplace, with orders, cancellations and payouts flowing back through the same endpoints.
- Infrastructure and APIs
- Small business
- $100B+ market
- Network effects, winner takes most
- US first
4/5
venture judge
6
similar startups, last 2 years (42 all-time)
94%
of 3 nearest real companies still alive
yes
6 matching federal grants and programs
Direction supported by government programs and grants
Scorecard
One score that balances how trendy the idea is, the demand for it and its potential for 100x, with competition measured relative to every other idea in the catalog. Recent startup trends first, government priorities second.
62
Idea Score, 0-100 · raw 37.5 x 1.64
Active
competition: more crowded than 56% of ideas · headwind x0.72
+2.0
government priorities, secondary (6 matching grants)
Trend
27
Is the wave forming now? 2025-26 entrants vs 2023-24, rounds since 2025, the sector's live-batch direction, the 2026 trend analyst.
- Entrants 2025-26 vs 2023-24 (similar companies)56
- Rounds announced 2025+ in the sector25
- Sector direction (live batch)0
- 2026 trend analyst25
Demand
70
Does anyone want it? YC's current RFS, companies already paid for something similar, the operator judge, founders' yes-rate in decks, readers who would run the test.
- YC asks for it (current RFS: idea / sector)60
- Someone already pays (similar companies, recent / all-time)100
- Operator judge: real pain50
100x potential
64
Can it return a fund? The venture judge (double weight), market-size and moat axes, neighbours still alive, the technologist judge.
- Venture judge75
- Market size axis100
- Moat axis100
- Neighbours still alive12
- Technologist judge25
Score = 100 x cbrt(Trend x Demand x 100x) x (1 - 0.5 x crowding) + government bonus (max 5), calibrated so the 95th-percentile idea scores 90 (order never changes). A geometric mean: a weak pillar cannot be papered over. Percentiles are among the 272 ideas in the catalog; the terms matched were lists, secondhand, item, everywhere, prices, resellers, shops, connect.
The idea in full
- What
- Small resellers and secondhand shops connect once to Listwire and their inventory appears, correctly categorised and priced, across every consumer resale marketplace, with orders, cancellations and payouts flowing back through the same endpoints. Pricing comes from the actual sold-price stream running through the API, not from scraped asking prices, so the recommendation gets sharper with every transaction routed. Self-serve signup, usage-based pricing per listed item and per completed sale, with a catalog operations team normalising the messy long tail behind the scenes.
- Why now
- The cluster shows the demand side without the plumbing: SellRaze (yc F25) sells speed of listing, Miniswap (yc F25) sells a hobby marketplace and Maison Safqa Holdings Limited runs luxury flash sales, while 81% of tracked sites in this cluster are still alive, meaning the marketplace count keeps growing and nobody is aggregating the connections.
- Wedge: first customer and entry point
- Sneaker and streetwear resellers doing 200 to 2,000 listings a month across three venues: one integration and a pricing endpoint is enough to win them.
- Path to 100x
- Secondhand and resale commerce is a $100B+ GMV market and the sold-price stream is a data asset that only the router can assemble, so better pricing pulls more sellers and more sellers make pricing better in a loop competitors cannot cold-start. At $10B of routed GMV and about 1.5% captured across listing and transaction fees that is roughly $150M of revenue on infrastructure margins.
- Ceiling
- If the platform stays stuck at hobbyist sellers, average revenue per account never covers the catalog operations cost and the loop never reaches escape velocity.
- Closest real companies, as the generator saw them
- SellRaze is a consumer-facing selling app and Miniswap and Maison Safqa Holdings Limited are marketplaces competing for the same supply. Listwire never owns the buyer or the listing surface, it sells the pipes, so marketplaces integrate it instead of fighting it.
- Main risk
- The two or three largest marketplaces restrict or price their APIs to stop an aggregator sitting between them and their sellers.
Five judges
Each judge scores every idea in the catalog with a named rubric; the venture judge decides whether a card is shown at all (4-5 is venture-grade).
Venture investor
4/5
Sold-price stream nobody else can assemble across $100B+ resale GMV is a real data flywheel, discounted by marketplace API hostility.
Bootstrapper
3/5
Sneaker resellers doing 2,000 listings a month pay today, but a catalog operations team for the long tail is a real payroll before scale.
Operator
3/5
Cross-listing is a real daily chore, but sneaker resellers doing 200 listings a month are a thin-wallet buyer and marketplaces control the APIs.
Technologist
2/5
The card names its own killer: the two or three largest marketplaces can price or close the APIs the entire router depends on.
Risk
1/5
The entire product is a router across marketplace APIs the two or three largest owners can restrict at will, exactly the platform dependence this lens rejects.
trends
2/5
Multichannel resale listing tools predate 2023; the card never connects its pipes to agent-driven shopping, the one relevant 2026 shift.
Similar startups in the directory
Companies whose pitch matches most of the idea's terms (lists, secondhand, item, everywhere, prices, resellers, shops, connect): 42 all-time, 6 from the last two years. Same matching as Idea Check.
Operator of WhatTime, a global B2B luxury watch re-commerce platform designed to deliver instant liquidity at competitive prices. Unlike traditional resale channels—where peer-to-peer transactions are slow and dealer buybacks undervalue assets—WhatTime combines speed with high-value outcomes. The platform sources pre-owned watches from domestic sellers through a real-time appraisal and pricing engine, then connects listings to a vetted global buyer network spanning Japan, Germany, Hong Kong, and China, with more than 20 secondary resellers across four countries. By doing so, WhatTime enables sellers to capture 90–105% of typical C2C listing prices with a transaction success rate above 70%, while completing the entire resale process in as little as one hour.
Marketplace to get stuff from overseas
Operator of an online marketplace intended to help people to rent short term retail space. The company's marketplace connects retailers, brands and designers with their customers through short-term retail stores, also known as pop-up shops, as well as helps realtors and space owners to list their property on the site and name their price and approve all bookings, enabling clients to benefit from each other and grow in terms of revenue.
Ambassadors for top-quality Japanese products, connecting Japanese boutiques and artisans with international consumers through an exceptional shopping experience
DOUZO is a global OMIYAGE Platform which makes new travel, cross-border commerce and international logistics.
The Marketplace for Complex Hobbies
The fastest way to sell online.
AI Driven EPC - Weld Fabrication Contractor
Misprint is building Robinhood for Pokemon cards
The Heart of Foodservice Equipment Procurement | Backhouse
Expedia for ordering blank apparel
The generator's reference companies
Real companies the model named as closest when it wrote the card, with their fate. A check mark is a company the radar could verify in its directory.
Public money in this direction
US federal grants, SBIR/STTR awards and open opportunities from the radar's public-money feed, matched to the idea's terms; the sector totals give the context.
6
grants and programs matching the idea
29
startup-relevant grants in Consumer
$8M
awarded in the sector, tracked
- Collaborative Research: III: Graph-based Vector Databases, from Theory to Practiceawardhigh relevance
National Science Foundation · Info Integration & Informatics · $200K · posted 2026-07-13
- Collaborative Research: III: Graph-based Vector Databases, from Theory to Practiceawardhigh relevance
National Science Foundation · Info Integration & Informatics · $200K · posted 2026-07-13
- Collaborative Research: III: Graph-based Vector Databases, from Theory to Practiceawardhigh relevance
National Science Foundation · Info Integration & Informatics · $400K · posted 2026-07-13
- Collaborative Research: Activity-Based Modeling and Optimization for Urban Curb Managementawardmedium relevance
National Science Foundation · ISP-Infrastructre Systms & Ppl · $325K · posted 2026-08-04
- Collaborative Research: Activity-Based Modeling and Optimization for Urban Curb Managementawardmedium relevance
National Science Foundation · ISP-Infrastructre Systms & Ppl · $325K · posted 2026-08-04
- Collaborative Research: III: Graph-based Vector Databases, from Theory to Practiceawardmedium relevance
National Science Foundation · Info Integration & Informatics · $200K · posted 2026-07-13
Market signal
What the radar sees in Consumer: new companies by cohort year, the forming YC batch, and outcomes since the February snapshot.
Consumer · 170 → 218 → 206 → 153 → 49 new companies 2022 → 2026 · 87% aliveYC S26: 8 in this cluster, 3% of the batch (was 5% in X26) (F26 is still forming: 21 listed)Since February, of 787 YC companies here: 2 acquired, 4 shut down, 37 rewrote their pitch
Design attributes
The card is one cell of a designed set: every axis below was chosen before the text was written, and the text had to realize it.
- Buyer
- Small business
- Business model
- Infrastructure and APIs
- Path to 100x
- Network effects, winner takes most
- Market size
- $100B+ market
- Capital intensity
- Capital-medium (ops, field teams)
- Speed to revenue
- Revenue in 1-3 years
- Technical depth
- Integrations, no-code
- Go-to-market
- Self-serve
- Moat
- Data moat
- Geography
- US first
- Regulation
- Unregulated
- Vibe
- Boring business
Listed under
An idea sits in its own sector and in any sector its text clearly touches.
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