# Top 11 Defence Tech Startups Founded in 2021 by Funding (2026)

> The 11 best-funded defence Tech startups founded in 2021, ranked by total funding raised: $4.8B combined.

Source: https://millionrounds.com/top-lists/defensetech-startups-founded-2021 (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Helsing** Helsing is a German defense technology company based in Munich, founded in 2021.](https://millionrounds.com/company/helsing) Helsing is a German defense technology company based in Munich, founded in 2021. *Founded* 2021 Munich, Germany **$3.7B** last round Jul 2026
- 2 [**Sierra Space** Sierra Space is a commercial aerospace and defense technology company based in Louisville, Colorado.](https://millionrounds.com/company/sierra-space) Sierra Space is a commercial aerospace and defense technology company based in Louisville, Colorado. *Founded* 2021 Louisville, United States **$550M** last round Mar 2026
- 3 [**Muon Space** Muon Space is an American aerospace startup founded in 2021, based in Mountain View, California.](https://millionrounds.com/company/muon-space) Muon Space is an American aerospace startup founded in 2021, based in Mountain View, California. *Founded* 2021 Mountain View, United States **$295M** last round Aug 2026
- 4 [**Defense Unicorns** Defense Unicorns is a veteran-owned defense technology company founded in 2021, with roots tracing back to late 2020.](https://millionrounds.com/company/defense-unicorns) Defense Unicorns is a veteran-owned defense technology company founded in 2021, with roots tracing back to late 2020. *Founded* 2021 Colorado Springs, United States **$136M** last round Jan 2026
- 5 [**Turion Space** Turion Space is an aerospace and defense company based in Irvine, California, founded in 2021 by a team from SpaceX.](https://millionrounds.com/company/turion-space) Turion Space is an aerospace and defense company based in Irvine, California, founded in 2021 by a team from SpaceX. *Founded* 2021 Irvine, United States **$115M** last round Apr 2026
- 6 [**Uplift360** Uplift360 is a cleantech startup focused on developing chemical-based technologies for recycling and reusing advanced materials, particularly in the defence and](https://millionrounds.com/company/uplift360) Uplift360 is a cleantech startup focused on developing chemical-based technologies for recycling and reusing advanced materials, particularly in the defence and *Founded* 2021 Luxembourg City, Luxembourg **$8.7M** last round Feb 2026
- 7 [**Space DOTS** Space DOTS® (Space Data & Orbital Testing Solutions) is a UK-based space technology startup founded in 2021 and headquartered in London.](https://millionrounds.com/company/space-dots) Space DOTS® (Space Data & Orbital Testing Solutions) is a UK-based space technology startup founded in 2021 and headquartered in London. *Founded* 2021 London, United Kingdom **$4.9M** last round Sept 2025
- 8 [**Monopulse** Producing professional grade UAVs for military, government and institutional use.](https://millionrounds.com/company/monopulse) Producing professional grade UAVs for military, government and institutional use. *Founded* 2021 Kongens Lyngby, Lithuania **$2.2M** last round Oct 2026
- 9 [**Integer Technologies** Integer Technologies is a defense technology and software company founded in 2021 and based in Columbia, South Carolina.](https://millionrounds.com/company/integer-technologies) Integer Technologies is a defense technology and software company founded in 2021 and based in Columbia, South Carolina. *Founded* 2021 Columbia, Netherlands **$1.2M** last round Sept 2025
- 10 [**Seitec** Seitec is a Canberra-based Australian defense technology startup founded in 2021 by CEO Daniel Stevens.](https://millionrounds.com/company/seitec) Seitec is a Canberra-based Australian defense technology startup founded in 2021 by CEO Daniel Stevens. *Founded* 2021 Canberra, Australia **$600K** last round Aug 2022
- 11 [**Astron Systems** Astron Systems is a UK-based rocket company focused on transforming the space launch industry.](https://millionrounds.com/company/astron-systems) Astron Systems is a UK-based rocket company focused on transforming the space launch industry. *Founded* 2021 Didcot, United Kingdom **$590K** last round Apr 2026

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies founded in 2021 whose funding rounds we classed in this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

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## More defence tech lists

[See all](https://millionrounds.com/top-lists?t=Defence%20Tech)

[*SA* *AI* *H* **Defence Tech startups that raised in 2026** 132 companies · $34B in 2026](https://millionrounds.com/top-lists/defensetech-startups-raised-2026)[*SA* *AI* *S* **Defence Tech startups in the United States that raised in 2026** 69 companies · $24B in 2026](https://millionrounds.com/top-lists/defensetech-startups-united-states-raised-2026)[*VE* *A* *NS* **Defence Tech startups founded in 2023** 20 companies · $3.3B](https://millionrounds.com/top-lists/defensetech-startups-founded-2023)[*U* *T* *CA* **Defence Tech startups in the United Kingdom that raised in 2026** 18 companies · $2.0B in 2026](https://millionrounds.com/top-lists/defensetech-startups-united-kingdom-raised-2026)[*RC* *FA* *ES* **Defence Tech startups founded in 2020** 13 companies · $832M](https://millionrounds.com/top-lists/defensetech-startups-founded-2020)[*CA* *A* *HA* **Defence Tech startups founded in 2024** 13 companies · $1.3B](https://millionrounds.com/top-lists/defensetech-startups-founded-2024)[*GS* *A* *AN* **Defence Tech startups in Australia** 11 companies · $977M](https://millionrounds.com/top-lists/defensetech-startups-australia)[*S* *C* *MI* **Defence Tech startups founded in 2022** 11 companies · $7.1B](https://millionrounds.com/top-lists/defensetech-startups-founded-2022)

## More lists worldwide

[See all](https://millionrounds.com/top-lists?r=Global)

[*GV* *V* *RP* **Health startups worldwide** 12,811 companies · $81B](https://millionrounds.com/top-lists/health-startups)[*O* *A* *X* **AI startups worldwide** 10,238 companies · $830B](https://millionrounds.com/top-lists/ai-startups)[*GV* *V* *RP* **Biotech startups worldwide** 7,127 companies · $70B](https://millionrounds.com/top-lists/biotech-startups)[*D* *B* *FT* **Big data startups worldwide** 3,812 companies · $220B](https://millionrounds.com/top-lists/big-data-startups)[*AF* *R* *S* **Fintech startups worldwide** 3,200 companies · $94B](https://millionrounds.com/top-lists/fintech-startups)[*O* *A* *B* **AI startups that raised in 2026** 2,922 companies · $540B in 2026](https://millionrounds.com/top-lists/ai-startups-raised-2026)[*FT* *CE* *P* **Energy providers startups worldwide** 2,808 companies · $152B](https://millionrounds.com/top-lists/energy-providers-startups)[*A* *P* *O* **Marketing tech startups worldwide** 2,728 companies · $28B](https://millionrounds.com/top-lists/marketing-tech-startups)