Company lists · Data refreshed November 2026
Top 25 Quantum security software companies worldwide
RevenueBase identified 677 company matches for quantum security software companies worldwide as of November 2026 and tracks 7,720 professional contacts across them, including 2,049 with verified work emails. The United States is the largest market and London the largest hub.
This list covers company matches for quantum security software companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026. Country and city lists for quantum security software companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest quantum security software companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 622 contacts → | ||||
Exact match “We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 265 contacts → | ||||
Exact match “Infleqtion, Inc.(NYSE: INFQ) is a global leader in quantum technology, delivering neutral atom solutions for quantum computing, networking, sensing, and security.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 3 | 181 contacts → | ||||
Exact match “QNu Labs, incubated in 2016 at IIT Madras, is the pioneer and architect of India’s quantum-secure digital backbone for the national digital trust.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 124 contacts → | ||||
Exact match “We are Toshiba Europe.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 117 contacts → | ||||
Exact match “At ID Quantique, an IonQ company, we harness light to develop and industrialize advanced quantum products and technologies for organizations to ensure long-term protection of data…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 102 contacts → | ||||
Exact match “Headquartered in Boston, Massachusetts, VIA is a mission-critical software company that enables organizations to share and analyze sensitive data at speed without compromising…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 101 contacts → | ||||
Exact match “Arqit - Strong, scalable quantum-safe security” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 96 contacts → | ||||
Exact match “Our team is shaping the way our digital world is protected against the threats of tomorrow.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 94 contacts → | ||||
Exact match “Terra Quantum is a leading quantum technology company based in Germany and Switzerland.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 86 contacts → | ||||
Exact match “Cryptomathic helps businesses and governments to deliver trust and confidence in the digital world.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 82 contacts → | ||||
Exact match “Fortytwo Labs is a cybersecurity innovation leader, pioneering Quantum-Safe Cryptography to secure today’s digital ecosystem and future-proof against quantum computing threats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 58 contacts → | ||||
Exact match “For years, security leaders have been told that preparing for post-quantum cryptography (PQC) would take years, cost millions and require deep in-house expertise.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 56 contacts → | ||||
Exact match “Quside designs and manufactures innovative quantum technologies for all connected devices.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 56 contacts → | ||||
Exact match “At Crypto4A we develop fifth-generation quantum-safe crypto-agile Hardware Security Modules (HSM).” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 55 contacts → | ||||
Exact match “Adva Network Security is a leading German IT-security company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 48 contacts → | ||||
Exact match “Luxquanta was established as a spin-off from ICFO in May 2021 with the goal of integrating advanced and secure quantum cryptography technologies into conventional communication…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 46 contacts → | ||||
Exact match “Piestany - Bratislava - Prague - Teplice - Warsaw - Lublin - Dublin - Vienna - London - Toronto - Washington, D.C.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 43 contacts → | ||||
Exact match “QuintessenceLabs is the leader in quantum-enhanced cybersecurity.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 43 contacts → | ||||
Exact match “Lastwall is a leader in identity security and quantum resilience, trusted by the U.S.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 43 contacts → | ||||
Exact match “QC Ware is a quantum computing software company building enterprise solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 41 contacts → | ||||
Exact match “We are QuantumGate, a team of world-class cryptographers, cybersecurity professionals, researchers, product experts, and operations professionals from leading global companies…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 40 contacts → | ||||
Exact match “We are a rapidly growing cybersecurity company with a 23-year history of no data breaches.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 23 | 39 contacts → | ||||
Exact match “Quantum cryptography is the most mature technology of the new era.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 24 | 39 contacts → | ||||
Exact match “Tychon, LLC is a cybersecurity software company founded by former U.S.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 25 | 38 contacts → | ||||
Exact match “Counterfeiting costs the world trillions every year.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “quantum security software companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 677 quantum security software companies worldwide
See the full list, filter by size, metro and specialty, and access 2,049 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Quantum security software companies worldwide at a glance
As of Nov 5, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for quantum security software companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “quantum security software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 2,049 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on November 5, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Quantum security software companies by location
5 lists · largest firstEvery Quantum security software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Quantum security software companies based in the United States176
- Quantum security software companies based in the United Kingdom50
- Quantum security software companies based in India49
- Quantum security software companies based in Canada34
Cities
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “quantum security software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many quantum security software companies are there worldwide?
RevenueBase identified 677 company matches for quantum security software companies worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
SSH Communications Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most quantum security software companies?
The United States leads with 176 companies, followed by the United Kingdom (50) and India (49). Every quantum security software companies list by country and city is linked on this page.
Which city has the most quantum security software companies?
London leads with 26 company records, followed by New York (13) and Chennai (9).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,049 professional contacts with verified work emails tracked across these 677 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 677 quantum security software companies worldwide. Start with a free account, no credit card.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
Company intelligence · public preview
Top 25 quantum security software companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 677 matching company records for quantum security software companies worldwide, with 7,720 tracked contacts and 2,049 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 quantum security software companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  SSH Communications Securityssh.comHQ: Helsinki, FinlandReported employees: Not recorded | Helsinki, Finland | Not recorded | Exact match | 622 contacts → |
“We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Infleqtioninfleqtion.comHQ: Louisville, CO, United StatesReported employees: 201-500 | Louisville, CO, United States | 201-500 | Exact match | 265 contacts → |
“Infleqtion, Inc.(NYSE: INFQ) is a global leader in quantum technology, delivering neutral atom solutions for quantum computing, networking, sensing, and security.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  QNU Labsqnulabs.comHQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 181 contacts → |
“QNu Labs, incubated in 2016 at IIT Madras, is the pioneer and architect of India’s quantum-secure digital backbone for the national digital trust.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Toshiba Europe LTDtoshiba.euHQ: Staines-upon-thames, United KingdomReported employees: 51-200 | Staines-upon-thames, United Kingdom | 51-200 | Exact match | 124 contacts → |
“We are Toshiba Europe.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  ID Quantiqueidquantique.comHQ: Geneva, SwitzerlandReported employees: 51-200 | Geneva, Switzerland | 51-200 | Exact match | 117 contacts → |
“At ID Quantique, an IonQ company, we harness light to develop and industrialize advanced quantum products and technologies for organizations to ensure long-term protection of data…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  VIAsolvewithvia.comHQ: Somerville, United StatesReported employees: 51-200 | Somerville, United States | 51-200 | Exact match | 102 contacts → |
“Headquartered in Boston, Massachusetts, VIA is a mission-critical software company that enables organizations to share and analyze sensitive data at speed without compromising…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  ARQITarqitgroup.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 101 contacts → |
“Arqit - Strong, scalable quantum-safe security” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Pqshieldpqshield.comHQ: Oxford, United KingdomReported employees: 51-200 | Oxford, United Kingdom | 51-200 | Exact match | 96 contacts → |
“Our team is shaping the way our digital world is protected against the threats of tomorrow.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Terra Quantum AGterraquantum.swissHQ: St. Gallen, SwitzerlandReported employees: 51-200 | St. Gallen, Switzerland | 51-200 | Exact match | 94 contacts → |
“Terra Quantum is a leading quantum technology company based in Germany and Switzerland.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Cryptomathiccryptomathic.comHQ: Åarhus, United StatesReported employees: 51-200 | Åarhus, United States | 51-200 | Exact match | 86 contacts → |
“Cryptomathic helps businesses and governments to deliver trust and confidence in the digital world.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Fortytwo Labsfortytwolabs.comHQ: Pune, IndiaReported employees: 51-200 | Pune, India | 51-200 | Exact match | 82 contacts → |
“Fortytwo Labs is a cybersecurity innovation leader, pioneering Quantum-Safe Cryptography to secure today’s digital ecosystem and future-proof against quantum computing threats.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Qusecurequsecure.comHQ: San Mateo, CA, United StatesReported employees: 51-200 | San Mateo, CA, United States | 51-200 | Exact match | 58 contacts → |
“For years, security leaders have been told that preparing for post-quantum cryptography (PQC) would take years, cost millions and require deep in-house expertise.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Qusidequside.comHQ: Barcelona, SpainReported employees: 51-200 | Barcelona, Spain | 51-200 | Exact match | 56 contacts → |
“Quside designs and manufactures innovative quantum technologies for all connected devices.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Crypto4a Technologiescrypto4a.comHQ: Ottawa, ON, CanadaReported employees: 11-50 | Ottawa, ON, Canada | 11-50 | Exact match | 56 contacts → |
“At Crypto4A we develop fifth-generation quantum-safe crypto-agile Hardware Security Modules (HSM).” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Adva Network Security Gmbhadvasecurity.comHQ: Berlin, GermanyReported employees: 51-200 | Berlin, Germany | 51-200 | Exact match | 55 contacts → |
“Adva Network Security is a leading German IT-security company.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Luxquantaluxquanta.comHQ: Hospitalet De Llobregat, SpainReported employees: 51-200 | Hospitalet De Llobregat, Spain | 51-200 | Exact match | 48 contacts → |
“Luxquanta was established as a spin-off from ICFO in May 2021 with the goal of integrating advanced and secure quantum cryptography technologies into conventional communication…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Decent Cybersecuritydecentcybersecurity.euHQ: Piešťany, SlovakiaReported employees: 11-50 | Piešťany, Slovakia | 11-50 | Exact match | 46 contacts → |
“Piestany - Bratislava - Prague - Teplice - Warsaw - Lublin - Dublin - Vienna - London - Toronto - Washington, D.C.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Quintessencelabsquintessencelabs.comHQ: Canberra Airport, AustraliaReported employees: 51-200 | Canberra Airport, Australia | 51-200 | Exact match | 43 contacts → |
“QuintessenceLabs is the leader in quantum-enhanced cybersecurity.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Lastwalllastwall.comHQ: Fredericton, HI, CanadaReported employees: 11-50 | Fredericton, HI, Canada | 11-50 | Exact match | 43 contacts → |
“Lastwall is a leader in identity security and quantum resilience, trusted by the U.S.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  QC Ware Corpqcware.comHQ: Palo Alto, CA, United StatesReported employees: 11-50 | Palo Alto, CA, United States | 11-50 | Exact match | 43 contacts → |
“QC Ware is a quantum computing software company building enterprise solutions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Quantumgatequantumgate.aeHQ: United StatesReported employees: 11-50 | United States | 11-50 | Exact match | 41 contacts → |
“We are QuantumGate, a team of world-class cryptographers, cybersecurity professionals, researchers, product experts, and operations professionals from leading global companies…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Secureage Technologysecureage.comHQ: SingaporeReported employees: 11-50 | Singapore | 11-50 | Exact match | 40 contacts → |
“We are a rapidly growing cybersecurity company with a 23-year history of no data breaches.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Qtlabsqtlabs.atHQ: Vienna, AustriaReported employees: 11-50 | Vienna, Austria | 11-50 | Exact match | 39 contacts → |
“Quantum cryptography is the most mature technology of the new era.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Tychontychon.ioHQ: Fairfax, VA, United StatesReported employees: 51-200 | Fairfax, VA, United States | 51-200 | Exact match | 39 contacts → |
“Tychon, LLC is a cybersecurity software company founded by former U.S.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Quantum Basequantumbase.comHQ: Lancaster, United KingdomReported employees: 11-50 | Lancaster, United Kingdom | 11-50 | Exact match | 38 contacts → |
“Counterfeiting costs the world trillions every year.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 677 company matches
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Quantum security software companies: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
676 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 677 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Quantum security software companies by location
5 lists · largest firstEvery Quantum security software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Quantum security software companies based in the United States176
- Quantum security software companies based in the United Kingdom50
- Quantum security software companies based in India49
- Quantum security software companies based in Canada34
Cities
Questions about this company list
What does Exact match mean for quantum security software companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many quantum security software companies did RevenueBase find worldwide?
The saved snapshot records 677 matching company records, 7,720 tracked contacts and 2,049 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
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Cite this list
RevenueBase Data Team. Top 25 quantum security software companies worldwide. Snapshot: November 5, 2026. https://revenuebase.ai/companies/browse/quantum-security-software-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 quantum security software companies worldwide
RevenueBase records 677 matching company records for quantum security software companies worldwide, with 7,720 tracked contacts and 2,049 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 quantum security software companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | SSH Communications Securityssh.com HQ: Helsinki, FinlandReported employees: Not recorded | Helsinki, Finland | Not recorded | Exact match | 622 contacts → |
“We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Infleqtioninfleqtion.com HQ: Louisville, CO, United StatesReported employees: 201-500 | Louisville, CO, United States | 201-500 | Exact match | 265 contacts → |
“Infleqtion, Inc.(NYSE: INFQ) is a global leader in quantum technology, delivering neutral atom solutions for quantum computing, networking, sensing, and security.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | QNU Labsqnulabs.com HQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 181 contacts → |
“QNu Labs, incubated in 2016 at IIT Madras, is the pioneer and architect of India’s quantum-secure digital backbone for the national digital trust.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Toshiba Europe LTDtoshiba.eu HQ: Staines-upon-thames, United KingdomReported employees: 51-200 | Staines-upon-thames, United Kingdom | 51-200 | Exact match | 124 contacts → |
“We are Toshiba Europe.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | ID Quantiqueidquantique.com HQ: Geneva, SwitzerlandReported employees: 51-200 | Geneva, Switzerland | 51-200 | Exact match | 117 contacts → |
“At ID Quantique, an IonQ company, we harness light to develop and industrialize advanced quantum products and technologies for organizations to ensure long-term protection of data…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | VIAsolvewithvia.com HQ: Somerville, United StatesReported employees: 51-200 | Somerville, United States | 51-200 | Exact match | 102 contacts → |
“Headquartered in Boston, Massachusetts, VIA is a mission-critical software company that enables organizations to share and analyze sensitive data at speed without compromising…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | ARQITarqitgroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 101 contacts → |
“Arqit - Strong, scalable quantum-safe security” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Pqshieldpqshield.com HQ: Oxford, United KingdomReported employees: 51-200 | Oxford, United Kingdom | 51-200 | Exact match | 96 contacts → |
“Our team is shaping the way our digital world is protected against the threats of tomorrow.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Terra Quantum AGterraquantum.swiss HQ: St. Gallen, SwitzerlandReported employees: 51-200 | St. Gallen, Switzerland | 51-200 | Exact match | 94 contacts → |
“Terra Quantum is a leading quantum technology company based in Germany and Switzerland.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Cryptomathiccryptomathic.com HQ: Åarhus, United StatesReported employees: 51-200 | Åarhus, United States | 51-200 | Exact match | 86 contacts → |
“Cryptomathic helps businesses and governments to deliver trust and confidence in the digital world.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Fortytwo Labsfortytwolabs.com HQ: Pune, IndiaReported employees: 51-200 | Pune, India | 51-200 | Exact match | 82 contacts → |
“Fortytwo Labs is a cybersecurity innovation leader, pioneering Quantum-Safe Cryptography to secure today’s digital ecosystem and future-proof against quantum computing threats.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Qusecurequsecure.com HQ: San Mateo, CA, United StatesReported employees: 51-200 | San Mateo, CA, United States | 51-200 | Exact match | 58 contacts → |
“For years, security leaders have been told that preparing for post-quantum cryptography (PQC) would take years, cost millions and require deep in-house expertise.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Qusidequside.com HQ: Barcelona, SpainReported employees: 51-200 | Barcelona, Spain | 51-200 | Exact match | 56 contacts → |
“Quside designs and manufactures innovative quantum technologies for all connected devices.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Crypto4a Technologiescrypto4a.com HQ: Ottawa, ON, CanadaReported employees: 11-50 | Ottawa, ON, Canada | 11-50 | Exact match | 56 contacts → |
“At Crypto4A we develop fifth-generation quantum-safe crypto-agile Hardware Security Modules (HSM).” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Adva Network Security Gmbhadvasecurity.com HQ: Berlin, GermanyReported employees: 51-200 | Berlin, Germany | 51-200 | Exact match | 55 contacts → |
“Adva Network Security is a leading German IT-security company.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Luxquantaluxquanta.com HQ: Hospitalet De Llobregat, SpainReported employees: 51-200 | Hospitalet De Llobregat, Spain | 51-200 | Exact match | 48 contacts → |
“Luxquanta was established as a spin-off from ICFO in May 2021 with the goal of integrating advanced and secure quantum cryptography technologies into conventional communication…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Decent Cybersecuritydecentcybersecurity.eu HQ: Piešťany, SlovakiaReported employees: 11-50 | Piešťany, Slovakia | 11-50 | Exact match | 46 contacts → |
“Piestany - Bratislava - Prague - Teplice - Warsaw - Lublin - Dublin - Vienna - London - Toronto - Washington, D.C.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Quintessencelabsquintessencelabs.com HQ: Canberra Airport, AustraliaReported employees: 51-200 | Canberra Airport, Australia | 51-200 | Exact match | 43 contacts → |
“QuintessenceLabs is the leader in quantum-enhanced cybersecurity.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Lastwalllastwall.com HQ: Fredericton, HI, CanadaReported employees: 11-50 | Fredericton, HI, Canada | 11-50 | Exact match | 43 contacts → |
“Lastwall is a leader in identity security and quantum resilience, trusted by the U.S.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | QC Ware Corpqcware.com HQ: Palo Alto, CA, United StatesReported employees: 11-50 | Palo Alto, CA, United States | 11-50 | Exact match | 43 contacts → |
“QC Ware is a quantum computing software company building enterprise solutions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Quantumgatequantumgate.ae HQ: United StatesReported employees: 11-50 | United States | 11-50 | Exact match | 41 contacts → |
“We are QuantumGate, a team of world-class cryptographers, cybersecurity professionals, researchers, product experts, and operations professionals from leading global companies…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Secureage Technologysecureage.com HQ: SingaporeReported employees: 11-50 | Singapore | 11-50 | Exact match | 40 contacts → |
“We are a rapidly growing cybersecurity company with a 23-year history of no data breaches.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Qtlabsqtlabs.at HQ: Vienna, AustriaReported employees: 11-50 | Vienna, Austria | 11-50 | Exact match | 39 contacts → |
“Quantum cryptography is the most mature technology of the new era.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Tychontychon.io HQ: Fairfax, VA, United StatesReported employees: 51-200 | Fairfax, VA, United States | 51-200 | Exact match | 39 contacts → |
“Tychon, LLC is a cybersecurity software company founded by former U.S.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Quantum Basequantumbase.com HQ: Lancaster, United KingdomReported employees: 11-50 | Lancaster, United Kingdom | 11-50 | Exact match | 38 contacts → |
“Counterfeiting costs the world trillions every year.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Quantum security software companies: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
676 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 677 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Quantum security software companies by location
5 lists · largest firstEvery Quantum security software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Quantum security software companies based in the United States176
- Quantum security software companies based in the United Kingdom50
- Quantum security software companies based in India49
- Quantum security software companies based in Canada34
Cities
Questions about this company list
What does Exact match mean for quantum security software companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many quantum security software companies did RevenueBase find worldwide?
The saved snapshot records 677 matching company records, 7,720 tracked contacts and 2,049 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 quantum security software companies worldwide. Snapshot: November 5, 2026. https://revenuebase.ai/companies/browse/quantum-security-software-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗