When was zerothird founded?

zerothird was founded in 2023 and raised its 1st funding round 2 years after it was founded.

Where is zerothird located?

zerothird is headquartered in Vienna, Austria.

How many employees does zerothird have?

As of Sep 30, 2026, the latest employee count at zerothird is 28.

Is zerothird a funded company?

zerothird is a funded company, having raised a total of $10M across 2 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on Jul 01, 2025.

When was the latest funding round of zerothird?

zerothird's latest funding was a $***** Seed round on Mar 23, 2026, with participation from 2 investors.

Where does zerothird rank among its competitors?

zerothird ranks 12th amongst 173 active competitors, of which 27 are funded. It stands 9th in terms of total funding among its competitors. The most recent competitor to raise funding was QNu Labs, which secured $21M in Sep, 2026.

Who are the top competitors of zerothird?

zerothird's top competitors include QNu Labs, QuintessenceLabs and SandboxAQ. Among them, QNu Labs secured the most recent funding round in September, 2026.

zerothird - 2026 Company Profile, Funding & Competitors

zerothird is a seed company based in Vienna (Austria), founded in 2023. It operates as a Developer of quantum key distribution systems and related lab equipment. zerothird has raised $10M in funding from Sparring Capital and Verbundx. The company has 173 active competitors, including 27 funded and 2 that have exited. Its top competitors include companies like QNu Labs, QuintessenceLabs and SandboxAQ.

Company Details

Developer of quantum key distribution systems and related lab equipment. The company provides quantum-grade protection through entangled photon sources and detector systems. It delivers enterprise-grade quantum keys as a managed service. The company's systems are engineered for deployment across enterprise and infrastructure networks.

Key Metrics

Founded Year

2023

Location

Vienna, Austria

Stage

Seed

Total Funding

$10M in 2 rounds

Latest Funding Round

Seed, Mar 23, 2026, $*****

Investors

Sparring Capital & 3 more

Ranked

12^th among 173 active competitors

Employee Count

28 as on Sep 30, 2026

Similar Companies

QNu Labs & 137 more

View zerothird's full profile

zerothird has raised a total funding of $10M over 2 rounds. Its first funding round was on Jul 01, 2025. Its latest funding round was a Seed round on Mar 23, 2026 for $*****. 2 investors participated in its latest round. zerothird has 4 institutional investors.

Here is the list of recent funding rounds of zerothird:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Mar 23, 2026	1604883	Seed	5725921	7950622	3702131	9850975
Jul 01, 2025	9754759	Seed	2287621	2054872	Sparring Capital	Findus Venture & 1 more

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View details of zerothird's funding rounds and investors

zerothird's employee count trend

zerothird has 28 employees as of Sep 26. Here is zerothird's employee count trend over the years:

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Top competitors of zerothird include QNu Labs, QuintessenceLabs and SandboxAQ. Here is the list of Top 10 competitors of zerothird, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	QNu Labs 2016, Bengaluru (India), Series A	Provider of quantum cryptography solutions, key distribution, random number generation	$43.3M	Speciale Invest, National Quantum Mission ... & 95 others	70/100
2nd	QuintessenceLabs 2008, Canberra (Australia), Series B	Provider of quantum cybersecurity solutions, including key management and distribution	$52.7M	Main Sequence, Westpac & 23 others	67/100
3rd	SandboxAQ 2022, Palo Alto (United States), Series E	Developer of quantitative artificial intelligence models for various industry applications	$950M	T. Rowe Price, Breyer Capital & 34 others	64/100
4th	SEALSQ 2022, Cointrin (Switzerland), Public	Manufacturer of semiconductor chips, embedded firmware, and other products	-	-	62/100
5th	BTQ 1998, Vancouver (Canada), Public	Provider of a platform offering post-quantum blockchain scaling solution	-	Quadrilium Ventures, A.G.P. Canada	61/100
6th	PQShield 2018, Oxford (United Kingdom), Series B	Provider of quantum computing solutions for secured communication	$65.3M	Addition, Kindred Capital & 14 others	58/100
7th	QuSecure 2019, San Mateo (United States), Series A	Provider of platform for cryptographic discovery, remediation, and compliance reporting	$28M	EvoNexus, Two Bear Capital & 2 others	56/100
8th	Naoris Protocol 2017, Wilmington (United States), Series A	Provider of a platform offering a suite of cybersecurity solutions	$15.1M	Uniera.ir, weXelerate & 14 others	56/100
9th	PQ Solutions 2009, London (United Kingdom), Series A	Post quantum encryption based data and communication security	$16.9M	Techstars, AM Partners & 15 others	55/100
10th	Sitehop 2021, Sheffield (United Kingdom), Series A	Provider of network security solutions for enterprises	$18.1M	Manta Ray Ventures, Amadeus Capital & 8 others	54/100
12th	zerothird 2023, Vienna (Austria), Seed	Developer of quantum key distribution systems and related lab equipment	$10M	Sparring Capital, KGAL & 2 others	52/100