New startup ideas · Physical world · Defense and space

startup idea

Millrun

Marketplace for precision aerospace parts, quoted instantly from real machine shop capacity.

Millrun is a marketplace where hardware teams upload a CAD file and get a firm price and date within minutes, sourced from a vetted network of CNC, sheet metal and composite shops with idle capacity.

Marketplace
Enterprise
$1-10B market
Platform others build on
Global from day one

4/5

venture judge

similar startups, last 2 years (38 all-time)

97%

of 3 nearest real companies still alive

yes

8 matching federal grants and programs

Direction supported by government programs and grants

Test it before you build it

$1,200 · 4 weeks · 20 prospects

For $1,200 and 4 weeks, prove space and robotics startups will pay a $500 deposit and prepay repeat machined part orders through a broker instead of going direct to the shop.

Riskiest assumption · An engineering lead who has used the marketplace once to find a shop will pay a disclosed 12 percent margin on orders two and three instead of contracting that shop directly.

1Focus group: who and where

The mechanical engineering lead or head of hardware at a 10 to 100 person commercial space or robotics startup, seed to Series B, with an active build this quarter, currently waiting 1 to 3 weeks for quotes on non export controlled aluminum brackets, housings and fittings from Xometry or a local shop.

where to find 20 · The YC Startup Directory filtered to space, aerospace and robotics companies with US offices, including 2026 cohort hardware buyers named on this card like GUILD and Tenet Industries (a list); AIAA Los Angeles Las Vegas section events and the El Segundo hardware cluster around them (a community); X, where these founders post build photos of machined parts and answer DMs (a channel).

2Sell first, build later

A sourcing desk for machined aluminum brackets, housings and fittings: upload CAD, get a firm price and ship date within 24 hours from vetted LA shops, parts inspected and delivered within 15 business days, starting within 3 weeks of the purchase order.

the ask · Shop cost plus a disclosed 12 percent margin per order, typical order $2,000 to $8,000; $500 refundable deposit up front, credited to the first order.

a real yes · A real yes is the $500 deposit paid and a prepaid purchase order for a real part; praise for the idea, a request for a free trial quote with no order attached, or an intro to a purchasing manager is not a yes.

3Small experiments

The first one attacks the riskiest assumption; each ends with a number that says whether to run the next.

1. Three order commitment pitch
$250 · 14 days
Book 15 calls with engineering leads sourced from the YC directory and X DMs. Pitch a sourcing desk that returns a firm price and ship date within 24 hours from vetted LA shops at a disclosed 12 percent margin, and ask on the call for a $500 refundable deposit that reserves priority capacity for their next three orders, not one. The founder runs every call and logs who balks at order two and three.
keep going if · 5 of 15 calls end with the $500 deposit invoice paid or scheduled for payment within 5 business days
2. Shop side capacity check
$150 · 7 days
Call 20 CNC and sheet metal shops in the LA metro pulled from Thomasnet and the NTMA Los Angeles chapter roster. Ask each to commit in writing to quoting a STEP file within 4 business hours and to state their open capacity for the next 30 days. One founder does this by phone and two shop visits.
keep going if · 8 of 20 shops commit in writing to 4 hour quote turnaround and name available capacity
3. Live RFQ to prepaid order
$800 · 21 days
Collect one live RFQ, a STEP file plus drawing, from each of 10 buyers on the calls. Hand quote with the 3 most responsive shops, return a firm price and ship date within 24 hours at shop cost plus 12 percent, and manage the winning orders through inspection and delivery. Budget covers gas, calipers and inspection time.
keep going if · 4 of 10 live RFQs convert to a prepaid purchase order at the quoted price

4Collect a deposit up front

Tesla took $1,000 refundable reservations for the Model 3 and $100 for the Cybertruck before building either: the deposit is the measurement, not the revenue.

$500

per prospect, refundable

how · A $500 refundable deposit on a standard invoice paid by ACH or company card after a one page sourcing agreement signed by the engineering lead; chosen because a startup buyer can approve a sub $1,000 invoice without procurement, and an invoice frames this as a vendor relationship from day one. set up: Stripe Invoicing ↗

what it reserves · Priority quoting and production capacity for the buyer's next three orders and the 12 percent margin locked in writing for those orders

refund · Refundable in full any time before the first order ships; otherwise credited entirely against the first order invoice.

target · 5 deposits of $500 from 20 pitched buyers within 30 days

before taking money · Broker only parts the buyer certifies in writing as not subject to ITAR or EAR export controls, and take no defense or government work before export counsel signs off.

Go: build it if

5 or more of 20 buyers pay the $500 deposit, 4 or more of 10 live RFQs convert to prepaid orders totaling $9,000 or more, and 8 or more of 20 shops commit to 4 hour quotes, all within 4 weeks.

Kill: stop if

1 or fewer deposits from 20 pitched buyers, or fewer than 2 of 10 live RFQs convert to a prepaid order, or the first converters place order one and 0 of them commit money to order two.

5 Scripts to run itoutreach message, landing copy, deposit terms · click to open

outreach message

Saw the machined parts in your latest build update. I run a sourcing desk for space and robotics teams in Los Angeles: send a STEP file and a drawing, and you get a firm price and ship date from a vetted local shop within 24 hours, with our 12 percent margin printed on the quote. If you are waiting on brackets, housings or fittings right now, can we take 20 minutes this week so I can quote a live part?

landing page

Firm machined part quotes in 24 hours from vetted LA shops $500 refundable deposit reserves priority capacity and a locked 12 percent margin on your next three orders Upload a STEP file and book your quoting slot

deposit terms

Your $500 deposit reserves priority quoting and production capacity for your next three machined part orders and locks our disclosed margin at 12 percent for those orders. It is credited in full against your first order and refundable any time before that order ships. Quotes come back within 24 hours of CAD upload; first deliveries land within 15 business days.

Would you run this test?

One tap. The yes-share feeds the Demand pillar of this idea's score; nobody sees who answered.

Budgets are out-of-pocket estimates for a team of one to three, US market. Size the deposit to the deal, and check the terms before taking money in a regulated line.

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.

Idea Score, 0-100 · raw 42.1 x 1.61

Active

competition: more crowded than 65% of ideas · headwind x0.67

+3.2

government priorities, secondary (24 matching grants)

Trend

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)48
Rounds announced 2025+ in the sector16
Sector direction (live batch)100
2026 trend analyst25

Demand

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)30
Someone already pays (similar companies, recent / all-time)100
Operator judge: real pain75

100x potential

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 axis33
Moat axis100
Neighbours still alive49
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 marketplace, precision, aerospace, parts, quoted, instantly, machine, hardware.

The idea in full

What: Millrun is a marketplace where hardware teams upload a CAD file and get a firm price and date within minutes, sourced from a vetted network of CNC, sheet metal and composite shops with idle capacity. Buyers are engineering organizations at aerospace, space and robotics manufacturers; Millrun takes a margin on each job and never touches inventory, so gross margins sit at software levels. The quoting engine is exposed as an embeddable widget and API, so CAD tools, PLM vendors and shop-management software resell instant quotes under their own brand.
Why now: The 2026 cohort alone added 25 companies to this cluster, and the recent list is dominated by physical builders: GUILD is trying to make aerospace parts faster and cheaper for defense, Mass Magnetics is making USA-made magnetics, Tenet Industries is building low-cost mass-producible defense systems. All of them buy machined parts and none of them owns the sourcing layer; the radar also shows no pitch phrase repeating across 4+ recent companies, so the supply side is unclaimed.
Wedge: first customer and entry point: Start with non-export-controlled commercial space and robotics brackets, housings and machined fittings for 20 hardware startups that already publish their part drawings, using 15 shops in one metro before expanding the shop network.
Path to 100x: Contract manufacturing sourcing for aerospace, space and industrial robotics is a $1-10B addressable fee pool, and every quote won or lost adds a price, lead-time and yield datapoint that no single shop or buyer can assemble. The company reaches 100x by becoming the default quoting engine embedded in CAD and PLM tools, so third parties build their sourcing flows on top and the pricing dataset makes Millrun structurally cheaper to quote against than any entrant.
Ceiling: Take rates in contract manufacturing brokerage compress toward single digits once shops organize, capping the business as a low-margin intermediary rather than a platform.
Closest real companies, as the generator saw them: GUILD is the closest, but it is building parts production itself for defense; Millrun stays a marketplace and deliberately starts with non-controlled commercial parts so it can operate globally from day one. Mass Magnetics is a component manufacturer and a likely supplier on the network, not a rival.
Main risk: Buyers use Millrun once to find a shop and then contract that shop directly, collapsing repeat take rate.

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
Software-margin marketplace with revenue within a year and a quoting dataset that compounds through embedded CAD and PLM distribution.
Bootstrapper
5/5
Software margins, revenue within a year, and 20 hardware startups already paying machine shops today; 15 shops in one metro is a two-person start.
Operator
4/5
Engineering teams already pay for machined brackets on quoted lead times, and uploading a CAD file is exactly how they buy today.
Technologist
2/5
Instant CAD-to-quote is already shipped by Xometry, Protolabs and Fictiv, so the wedge is 15 shops in one metro rather than any technical edge.
Risk
4/5
Capital-light, revenue within a year, deliberately avoids export-controlled parts, and spreads risk across 15 shops and 20 buyers rather than one channel.
trends
2/5
Instant CNC quoting marketplaces were equally buildable in 2023; hardware customers like GUILD arriving is demand growth, not a shift that newly enables this.

Similar startups in the directory

Companies whose pitch matches most of the idea's terms (marketplace, precision, aerospace, parts, quoted, instantly, machine, hardware): 38 all-time, 7 from the last two years. Same matching as Idea Check.

RMFGyc S21 · 2021 · Robotics and physical worldalive
Advanced Contract MFG for fast moving hardware companies
F4ge500global · Robotics and physical worldalive
F4GE is an AI-native precision manufacturing company building the execution layer for critical hardware supply chains across defense, aerospace, space, robotics, and advanced industrial systems.
Waybillyc S26 · 2026 · Commerce and marketplacesalive
Agentic procurement & inventory for deep tech teams.
CUTRyc W22 · 2022 · Commerce and marketplacesalive
The marketplace for wood manufacturing
MonoRevoplugandplay · Commerce and marketplacesalive
A procurement platform for small-lot parts and management SaaS for small-lot manufacturing sites
株式会社カブクplugandplay · Commerce and marketplacesacquired
Kabuku provides 3D printing solutions, operation services, and a marketplace through their Rinkak platform.
株式会社ひびき精機plugandplay · Robotics and physical worldalive
Hibiki Seiki have grown to specialize in providing high precision products combining both lathe and machining elements.
Ultrasoniumyc S26 · 2026 · Robotics and physical worldalive
Metal manufacturing, faster, cheaper, and more versatile.
Haptica Roboticsplugandplay PnP 2026 · 2026 · Robotics and physical worldalive
Haptica Robotics is a technology company that develops haptic and touch systems for robotics and human-machine interaction.
Lexiusyc W26 · 2026 · Security and compliancealive
AI for Corporate Security Cameras
Reframeyc W26 · 2026 · Commerce and marketplacesalive
AI-native, hardware procurement marketplace
GroundControlyc X25 · 2025 · Vertical AI agentsalive
Vertical AI for highly-regulated manufacturing

Run this as an Idea Check →

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.

grants and programs matching the idea

startup-relevant grants in Defense and space

$41M

awarded in the sector, tracked

opportunities open now in the sector

Development of a milk analyzing technology for the detection of antibiotic contamination using fluorescence spectroscopy and artificial intelligence.awardhigh relevance
NIH / FDA · SBIR phase I · $200K · posted 2026-09-30
Derivation and Validation of the Heart Failure CardioScore: an AI Diagnostic for HeartFailure using Novel Biomarkers and Clinical Dataawardhigh relevance
NIH / NHLBI · SBIR phase II · $1M · posted 2026-09-01
I-Corps: Translation Potential of a Hybrid Quantum-Classical Drug Discovery Platformawardhigh relevance
National Science Foundation · TIP-CHIPS KTA-3 Quantum · $50K · posted 2026-08-17
SBIR Phase II: Ai-mediated Neurotechnology for Enhanced Access to Virtual and Physical Realityawardhigh relevance
National Science Foundation · SBIR Phase II · $1M · posted 2026-08-04
Leveraging AI/ML for Environmental Health Risk Assessment in Homesawardhigh relevance
NIH / NIEHS · SBIR phase I · $307K · posted 2026-08-01
I-Corps: Translation potential of a modular control architecture to improve a robot’s accuracyawardhigh relevance
National Science Foundation · I-Corps · $50K · posted 2026-07-29
I-Corps: Translation potential of verifiable reward-signal generators for agentic reinforcement learning (RL) environmentsawardhigh relevance
National Science Foundation · I-Corps · $50K · posted 2026-07-20
Low-Cost, User-Friendly SERS Technology for Rapid Detection of Emerging Drug Threatsawardhigh relevance
NIH / NIDA · SBIR phase I · $314K · posted 2026-07-01

All public money by sector →

Market signal

What the radar sees in Defense and space: new companies by cohort year, the forming YC batch, and outcomes since the February snapshot.

Defense and space · 16 → 27 → 44 → 41 → 39 new companies 2022 → 2026 · 94% aliveYC F26 live: 4 in this cluster, 3% of the batch (was 4% in S26)Since February, of 63 YC companies here: 0 acquired, 0 shut down, 10 rewrote their pitch

Defense and space: companies, trend and grants →

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: Enterprise
Business model: Marketplace
Path to 100x: Platform others build on
Market size: $1-10B market
Capital intensity: Capital-light (software margins)
Speed to revenue: Revenue within a year
Technical depth: Integrations, no-code
Go-to-market: Partners and channels
Moat: Data moat
Geography: Global from day one
Regulation: Unregulated
Vibe: Boring business