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YC Aviation and Space companies

68 Y Combinator companies in Aviation and Space, with team size, growth, open roles and funding.

Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.

Hiring the mostlast 60 days
244 roles
Relativity SpaceW16
  1. 2Astranis103
  2. 3Astro Mechanica45
See all 21
Fastest growingteam, 6 months
+71%
Airhart AeronauticsS22
  1. 2Starcloud+57%
  2. 3Orbital Operations+53%
See all 27
Shrinkingteam, 12 months
−62%
Stralis AircraftW23
  1. 2Beyond Aero−1%
See all 2
Raised the mostlast 12 months
$1B
Stoke SpaceW21
  1. 2Boom$300M
  2. 3Starcloud$250M
See all 14
Companies
68
Active
62
Hiring, last 60 days
21
Open roles, 60 days
491
People on these teams
5,578
Showing 50 of 68 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
Building humanity’s multiplanetary future.
W162,015+6%+20%244$1.4BSeries F$20M, Nov 2023
Advanced satellites for high orbits.
W16564+7%+20%103$1.7BDebt$468M, Sep 2026
Seamless mobility to, through, and from space. It starts with 100%…
W21451+17%+33%4$2.4BSeries E$1B, Sep 2026
Economically and environmentally sustainable supersonic travel
W16365+10%+22%14$732MUndisclosed round$300M, Dec 2025
All-electric seagliders for fast, affordable regional transportation
W21288+11%+15%30$327MDebt$120M, Aug 2026
Autonomous electric airplanes
S17140+6%+40%8$88.1MSeries B$40M, Sep 2024
Turning space into a transportation layer for Earth
S21131+20%+30%3$54.3MSeries A$44M, Nov 2024
We visually monitor space objects for governments and defense
S21125+12%+21%0$38.4MSeries B$26.4M, Sep 2026
First electric business aircraft designed for hydrogen propulsion
W2291−6%−1%0$20MSeries A$20M, Oct 2024
Heart makes electric airplanes with an all-electric range of 250 miles
W1989+14%+24%2$151MGrant$4.1M, Sep 2024
Bluetooth to Space
W2288+16%+31%2$291MSeries C$200M, Sep 2026
Full-stack VLEO satellite missions
W2178+13%+20%6$103MSeries A$35M, Jan 2024
Supersonics for the new Jet Age
W2471+51%+137%45$27.6MSeries B$27.1M, Jul 2026
The space infrastructure services company
S18Public67+14%+24%0$237MPost-IPO equity$25M, Jun 2026
Data centers in space
S2466+57%+128%YC$444MSeries A$250M, Aug 2026
Building and Protecting an Exciting Future
S2362  0$80MSeries A$80M, Jul 2026
High-res hyperspectral pictures of Earth from space
W22570%+8%0$20.7MDebt$2.2M, Mar 2026
The lightest electric aircraft motors in the world.
W2157+4%+21%0$24.6MSeries A$20M, Aug 2024
We're building satellites to create a real-time 3D map of the world.
S2255+31%+38%9$56.6MUndisclosed round$21M, Jul 2026
Vertical takeoff and landing aircraft for major airlines
S2151−4%+11%3$42.1MUndisclosed round$173K, Apr 2026
Boeing for electric planes
W1750+11%+9%YC$4.1MGrant$3.3M, Aug 2024
Orbital logistics: Unleashing space industry, from Earth to asteroids
S2134+26%+3%YC$9.5MUndisclosed round$2.5M, Sep 2025
Last-mile delivery for satellites.
S19310%+7%0$150KYC investment$150K, Jan 2021
High Thrust Space Vehicles for Satellite Defense
W2526+53%+117%1$8.8MSeed$8.8M, Aug 2025
AI systems for aviation
W2522+10%+29%0$500KYC investment$500K, Mar 2025
Autonomous Stratospheric UAVs
S2121+17%+17%YC$450KSeed$450K, Jan 2023
We build advanced satcom user terminals
W2019+12%+36%3$23.6MCorporate round$10M, Nov 2025
We make the world's most efficient aircraft
S2216+7% 0SeedJan 2024
We make satellites to image everywhere on Earth, every 15 minutes
W21160%−6%1$3.4MGrant$3.4M, Jan 2026
Vertical AI for highly-regulated manufacturing
X2514+8%+56%1$500KYC investment$500K, Sep 2025
Building persistent, high-performance infrastructure in the sky
W2313 +18%0$5MSeed$4.5M, Jan 2024
Space solar arrays that grow to the size of a football field in orbit
W2612  5$10.5MSeed$10M, Jul 2026
Airplanes anyone can fly
S2212+71%+140%YC$4.6MUndisclosed round$4.6M, Oct 2025
The highest-accuracy global weather data from low-cost flat satellites
W2112+33%+50%0SeedApr 2024
Agent-Driven Engineering
W2411 +22%YC$5.6MSeed$5.6M, Dec 2025
Constellations as a Service
W2411+38%+83%0$4MSeed$3.5M, May 2024
Reusable Satellites
W2510−41%−41%YC$7.1MSeed$7.1M, Dec 2025
24/7 satellite connectivity in low Earth orbit
F249−10% 2$4.3MSeed$4.3M, Jul 2025
Unified flight software and hardware for the mission of tomorrow
W249+29%+29%0$2MPre-seed$2M, Feb 2024
The Modular Interceptor Platform
F258  YC$500KYC investment$500K, Dec 2025
Emission free hydrogen electric aircraft
W238−58%−62%0$2.2MGrant$161K, Jul 2025
Hypersonic space plane that can take-off from any location and weather
S2280%−20%0$1MPre-seed$1M, Jul 2022
Commercial alternative to the Deep Space Network
X257−12%+17%YC$5.9MSeed$5.9M, Jul 2025
In-Space Refueling
S2460% 3$6.8MSeed$6.3M, Jun 2026
Foundation models for 24/7 Earth Observation
W265  0Seed (before YC)Dec 2025
The GD&T Analysis Platform for Engineering Drawings
S255−17%−17%0$500KYC investment$500K, Sep 2025
Building lunar landers
W255  0SeedMar 2025
Building low-cost cruise missiles
S245−17%−17%0$500KYC investment$500K, Aug 2024
Tesseract builds better thrusters for modern satellites
S1750%0%0$929KEquity crowdfunding$929K, Dec 2018
Prime Lightworks Inc. manufactures electric propulsion systems for…
S1650%0%0$1.2MEquity crowdfunding$24K, Apr 2023

How this works

1. The roster

Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.

2. The numbers

Each company is matched to Crustdata by its website. Crustdata adds team size and its change over 6 and 12 months, open roles from job postings, reported funding, and founders' past employers.

3. The lists

Hiring the most counts distinct roles posted in the last 60 days. Growth needs 10+ people today, shrinking 20+ a year ago, so tiny teams do not top the lists. Rebuilt every week.

Built with Crustdata. Get your own API key and build your own.

The numbers on this page come from three Crustdata API calls. Crustdata tags 5,000+ companies with Y Combinator as an investor; swap the filter for any investor, industry or headcount range and track your own list, with founders' work emails one call away.

  • Company search for team size, growth and funding
  • Job search with a count by company, for who is hiring and for what
  • A watch that re-runs the search weekly and sends only what changed
# 1. every company with Y Combinator as an investor
curl https://api.crustdata.com/company/search \
  -H "authorization: Bearer $CRUSTDATA_API_KEY" \
  -H "x-api-version: 2025-11-01" \
  -d '{
    "filters": { "field": "funding.investors",
                 "type": "in", "value": ["Y Combinator"] },
    "fields": ["basic_info.name",
      "headcount.total", "headcount.growth_percent",
      "funding.total_investment_usd"],
    "limit": 100
  }'

# 2. open listings per company, last 60 days (limit 0 = counts only)
curl https://api.crustdata.com/job/search \
  -H "authorization: Bearer $CRUSTDATA_API_KEY" \
  -H "x-api-version: 2025-11-01" \
  -d '{
  "filters": { "op": "and", "conditions": [
    { "field": "company.basic_info.company_id",
      "type": "in", "value": [...] },
    { "field": "metadata.date_added",
      "type": "=>", "value": "2026-08-24" } ]},
  "limit": 0,
  "aggregations": [{ "type": "group_by",
    "field": "company.basic_info.company_id", "agg": "count" }]
}'

# 3. the same company filter as a weekly watch: POST /watch/company/search

Questions about YC Aviation and Space companies

How many YC Aviation and Space companies are there?

68 Y Combinator companies are in Aviation and Space; 62 are active.

Which YC Aviation and Space companies are hiring?

21 companies posted roles in the last 60 days, led by Relativity Space (244 roles), Astranis (103 roles) and Astro Mechanica (45 roles). 29 mark themselves as hiring on YC's directory.

Which YC Aviation and Space companies are growing fastest?

By team growth over 6 months (10+ people): Airhart Aeronautics (+71%), Starcloud (+57%) and Orbital Operations (+53%).

Which YC Aviation and Space companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Stoke Space ($1B), Boom ($300M) and Starcloud ($250M).

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