Company lists · Data refreshed September 2026
Top 25 Quantum computing security companies based in the United States
RevenueBase identified 204 company matches for quantum computing security companies associated with the United States as of September 2026 and tracks 3,707 professional contacts across them, including 1,589 with verified work emails and 1,525 with mobile numbers. New York is the largest hub.
This list covers company matches for quantum computing security companies associated with the United States, 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 September 5, 2026.
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 computing security companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 598 contacts → | ||||
Exact match “Science led and enterprise driven, Quantinuum unites Cambridge Quantum’s best-in-class software with Honeywell Quantum Solutions’ high-performing trapped-ion hardware.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 2 | 574 contacts → | ||||
Exact match “IonQ, Inc.[NYSE: IONQ] is the world’s leading quantum platform and foundry - delivering integrated quantum solutions across computing, networking, sensing, and security.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 3 | 211 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 · Sep 5, 2026 · View company records in RevenueBase | |||||
| 4 | 171 contacts → | ||||
Exact match “Rigetti is a pioneer in full-stack quantum computing.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 5 | 142 contacts → | ||||
Exact match “Quantum computing is moving from "one day" to "day one." QuEra Computing is leading that transition.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 6 | 96 contacts → | ||||
Exact match “We build scalable quantum computers with atomic arrays that empower our customers to achieve computational breakthroughs.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 7 | 89 contacts → | ||||
Exact match “Launched in 2019, NTT Research is a Silicon Valley-based startup dedicated to conducting fundamental research in the fields of physics, cryptography and medical informatics with a…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 8 | 87 contacts → | ||||
Exact match “Quantum Computing Inc.(Nasdaq: QUBT) is a quantum optics and integrated photonics company focused on delivering accessible, scalable, and cost-effective quantum machines and…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 9 | 86 contacts → | ||||
Exact match “The U.S.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 10 | 59 contacts → | ||||
Exact match “Vector Atomic is commercializing quantum technology for applications including GPS-free navigation, telecommunications, and computing.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 11 | 51 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 · Sep 5, 2026 · View company records in RevenueBase | |||||
| 12 | 38 contacts → | ||||
Exact match “QC Ware is a quantum computing software company building enterprise solutions.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 13 | 35 contacts → | ||||
Exact match “Eternal Encryption.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 14 | 34 contacts → | ||||
Exact match “SEEQC is developing the first digital quantum computing platform for global businesses.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 15 | 31 contacts → | ||||
Exact match “Strangeworks is an unconventional computing software company based in Austin, TX.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 16 | 29 contacts → | ||||
Exact match “Eclypses is redefining data security for the AI and quantum era.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 17 | 26 contacts → | ||||
Exact match “Aliro, The Quantum Networking Company®, offers AliroNet® to run entanglement-based Quantum Networks for applications such as Quantum Secure Communications (QSC), secure access to…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 18 | 22 contacts → | ||||
Exact match “SafeLogic’s proven and validated cryptographic solutions enable enduring privacy and trust in the ever-changing digital world.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 19 | 21 contacts → | ||||
Exact match “Haiqu is a quantum software company developing a new application execution stack for all modalities of near-term quantum computers.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 20 | 20 contacts → | ||||
Exact match “Atlantic Quantum is now part of Google Quantum AI.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 21 | 17 contacts → | ||||
Exact match “Security audits, development, and research for ZKP, FHE, PQC, and MPC applications, and more generally advanced cryptography.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 22 | 17 contacts → | ||||
Exact match “Entrokey leverages generative AI to produce quantum-resistant random sequences, ensuring enhanced security against future quantum threats.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 23 | 16 contacts → | ||||
Exact match “EeroQ is building a next-generation quantum computer using the technology of today.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 24 | 16 contacts → | ||||
Exact match “Quantum XChange protects the world’s data in motion from advances in computing and everyday cybersecurity risks.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 25 | 16 contacts → | ||||
Exact match “The only provably quantum-safe security for enterprise data in transit.” Recorded in the RevenueBase company graph · Sep 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 computing security 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 204 quantum computing security companies based in the United States
See the full list, filter by size, metro and specialty, and access 1,589 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Quantum computing security companies based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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.
- What qualifies
- Company records associated with the United States whose business descriptions match “quantum computing security 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 1,589 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 September 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.
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 computing security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many quantum computing security companies are there based in the United States?
RevenueBase identified 204 company matches for quantum computing security companies associated with the United States as of September 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?
Quantinuum tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most quantum computing security companies?
New York leads with 13 company records, followed by Austin (8) and Chicago (7).
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 1,589 professional contacts with verified work emails tracked across these 204 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 September 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 204 quantum computing security companies based in the United States. Start with a free account, no credit card.
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Quantum computing security companies by geography
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
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- Quantum computing security companies based in London, United Kingdom
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Company intelligence · public preview
Top 25 quantum computing security companies based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 204 matching company records for quantum computing security companies based in the United States, with 3,707 tracked contacts and 1,589 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: September 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 computing security companies based in the United States
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 |  Quantinuumquantinuum.comHQ: Broomfield, CO, United StatesReported employees: 201-500 | Broomfield, CO, United States | 201-500 | Exact match | 598 contacts → |
“Science led and enterprise driven, Quantinuum unites Cambridge Quantum’s best-in-class software with Honeywell Quantum Solutions’ high-performing trapped-ion hardware.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  IONQionq.comHQ: College Park, MD, United StatesReported employees: 1,001-5,000 | College Park, MD, United States | 1,001-5,000 | Exact match | 574 contacts → |
“IonQ, Inc.[NYSE: IONQ] is the world’s leading quantum platform and foundry - delivering integrated quantum solutions across computing, networking, sensing, and security.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Infleqtioninfleqtion.comHQ: Louisville, CO, United StatesReported employees: 201-500 | Louisville, CO, United States | 201-500 | Exact match | 211 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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Rigetti Computingrigetti.comHQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 171 contacts → |
“Rigetti is a pioneer in full-stack quantum computing.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Quera Computing INCquera.comHQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 142 contacts → |
“Quantum computing is moving from "one day" to "day one." QuEra Computing is leading that transition.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Atom Computingatom-computing.comHQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 96 contacts → |
“We build scalable quantum computers with atomic arrays that empower our customers to achieve computational breakthroughs.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  NTT Researchntt-research.comHQ: Sunnyvale, CA, United StatesReported employees: 201-500 | Sunnyvale, CA, United States | 201-500 | Exact match | 89 contacts → |
“Launched in 2019, NTT Research is a Silicon Valley-based startup dedicated to conducting fundamental research in the fields of physics, cryptography and medical informatics with a…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Quantum Computing INCquantumcomputinginc.comHQ: Hoboken, NJ, United StatesReported employees: 201-500 | Hoboken, NJ, United States | 201-500 | Exact match | 87 contacts → |
“Quantum Computing Inc.(Nasdaq: QUBT) is a quantum optics and integrated photonics company focused on delivering accessible, scalable, and cost-effective quantum machines and…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  VIAsolvewithvia.comHQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 86 contacts → |
“The U.S.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Vector Atomicvectoratomic.comHQ: Pleasanton, CA, United StatesReported employees: 51-200 | Pleasanton, CA, United States | 51-200 | Exact match | 59 contacts → |
“Vector Atomic is commercializing quantum technology for applications including GPS-free navigation, telecommunications, and computing.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Qusecurequsecure.comHQ: San Mateo, CA, United StatesReported employees: 51-200 | San Mateo, CA, United States | 51-200 | Exact match | 51 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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  QC Ware Corpqcware.comHQ: Palo Alto, CA, United StatesReported employees: 11-50 | Palo Alto, CA, United States | 11-50 | Exact match | 38 contacts → |
“QC Ware is a quantum computing software company building enterprise solutions.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  QRYPTqrypt.comHQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 35 contacts → |
“Eternal Encryption.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  SEEQCseeqc.comHQ: Elmsford, NY, United StatesReported employees: 11-50 | Elmsford, NY, United States | 11-50 | Exact match | 34 contacts → |
“SEEQC is developing the first digital quantum computing platform for global businesses.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Strangeworksstrangeworks.comHQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 31 contacts → |
“Strangeworks is an unconventional computing software company based in Austin, TX.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Eclypseseclypses.comHQ: Boston, MA, United StatesReported employees: 11-50 | Boston, MA, United States | 11-50 | Exact match | 29 contacts → |
“Eclypses is redefining data security for the AI and quantum era.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  ALIROalirotech.comHQ: Boston, MA, United StatesReported employees: 11-50 | Boston, MA, United States | 11-50 | Exact match | 26 contacts → |
“Aliro, The Quantum Networking Company®, offers AliroNet® to run entanglement-based Quantum Networks for applications such as Quantum Secure Communications (QSC), secure access to…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Safelogicsafelogic.comHQ: Vienna, VA, United StatesReported employees: 11-50 | Vienna, VA, United States | 11-50 | Exact match | 22 contacts → |
“SafeLogic’s proven and validated cryptographic solutions enable enduring privacy and trust in the ever-changing digital world.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  HAIQUhaiqu.aiHQ: Brooklyn, United StatesReported employees: 11-50 | Brooklyn, United States | 11-50 | Exact match | 21 contacts → |
“Haiqu is a quantum software company developing a new application execution stack for all modalities of near-term quantum computers.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Atlantic Quantumblog.googleHQ: Cambridge, MA, United StatesReported employees: 11-50 | Cambridge, MA, United States | 11-50 | Exact match | 20 contacts → |
“Atlantic Quantum is now part of Google Quantum AI.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Zksecurityzksecurity.xyzHQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 17 contacts → |
“Security audits, development, and research for ZKP, FHE, PQC, and MPC applications, and more generally advanced cryptography.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Entrokey Labsentrokeylabs.comHQ: Mclean, VA, United StatesReported employees: 11-50 | Mclean, VA, United States | 11-50 | Exact match | 17 contacts → |
“Entrokey leverages generative AI to produce quantum-resistant random sequences, ensuring enhanced security against future quantum threats.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Eeroq Corporationeeroq.comHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 16 contacts → |
“EeroQ is building a next-generation quantum computer using the technology of today.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Quantum Xchangequantumxc.comHQ: Bethesda, MD, United StatesReported employees: 11-50 | Bethesda, MD, United States | 11-50 | Exact match | 16 contacts → |
“Quantum XChange protects the world’s data in motion from advances in computing and everyday cybersecurity risks.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  American Binaryambit.incHQ: Kirkland, WA, United StatesReported employees: 11-50 | Kirkland, WA, United States | 11-50 | Exact match | 16 contacts → |
“The only provably quantum-safe security for enterprise data in transit.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 204 company matches
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Quantum computing security companies: dataset insights
September 5, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
204 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
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: September 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 ↗
Questions about this company list
What does Exact match mean for quantum computing security 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 computing security companies did RevenueBase find based in the United States?
The saved snapshot records 204 matching company records, 3,707 tracked contacts and 1,589 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: September 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
Quantum computing security companies by geography
Cite this list
RevenueBase Data Team. Top 25 quantum computing security companies based in the United States. Snapshot: September 5, 2026. https://revenuebase.ai/companies/quantum-computing-security-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
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- New lists
- Quantum computing security companies based in the United Kingdom
- Quantum computing security companies based in Canada
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- Quantum computing security companies based in London, United Kingdom
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- AI companies based in the United States
Company intelligence · public preview
Top 25 quantum computing security companies based in the United States
RevenueBase records 204 matching company records for quantum computing security companies based in the United States, with 3,707 tracked contacts and 1,589 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: September 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 computing security companies based in the United States
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 | Quantinuumquantinuum.com HQ: Broomfield, CO, United StatesReported employees: 201-500 | Broomfield, CO, United States | 201-500 | Exact match | 598 contacts → |
“Science led and enterprise driven, Quantinuum unites Cambridge Quantum’s best-in-class software with Honeywell Quantum Solutions’ high-performing trapped-ion hardware.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | IONQionq.com HQ: College Park, MD, United StatesReported employees: 1,001-5,000 | College Park, MD, United States | 1,001-5,000 | Exact match | 574 contacts → |
“IonQ, Inc.[NYSE: IONQ] is the world’s leading quantum platform and foundry - delivering integrated quantum solutions across computing, networking, sensing, and security.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Infleqtioninfleqtion.com HQ: Louisville, CO, United StatesReported employees: 201-500 | Louisville, CO, United States | 201-500 | Exact match | 211 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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Rigetti Computingrigetti.com HQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 171 contacts → |
“Rigetti is a pioneer in full-stack quantum computing.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Quera Computing INCquera.com HQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 142 contacts → |
“Quantum computing is moving from "one day" to "day one." QuEra Computing is leading that transition.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Atom Computingatom-computing.com HQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 96 contacts → |
“We build scalable quantum computers with atomic arrays that empower our customers to achieve computational breakthroughs.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | NTT Researchntt-research.com HQ: Sunnyvale, CA, United StatesReported employees: 201-500 | Sunnyvale, CA, United States | 201-500 | Exact match | 89 contacts → |
“Launched in 2019, NTT Research is a Silicon Valley-based startup dedicated to conducting fundamental research in the fields of physics, cryptography and medical informatics with a…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Quantum Computing INCquantumcomputinginc.com HQ: Hoboken, NJ, United StatesReported employees: 201-500 | Hoboken, NJ, United States | 201-500 | Exact match | 87 contacts → |
“Quantum Computing Inc.(Nasdaq: QUBT) is a quantum optics and integrated photonics company focused on delivering accessible, scalable, and cost-effective quantum machines and…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | VIAsolvewithvia.com HQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 86 contacts → |
“The U.S.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Vector Atomicvectoratomic.com HQ: Pleasanton, CA, United StatesReported employees: 51-200 | Pleasanton, CA, United States | 51-200 | Exact match | 59 contacts → |
“Vector Atomic is commercializing quantum technology for applications including GPS-free navigation, telecommunications, and computing.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Qusecurequsecure.com HQ: San Mateo, CA, United StatesReported employees: 51-200 | San Mateo, CA, United States | 51-200 | Exact match | 51 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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | QC Ware Corpqcware.com HQ: Palo Alto, CA, United StatesReported employees: 11-50 | Palo Alto, CA, United States | 11-50 | Exact match | 38 contacts → |
“QC Ware is a quantum computing software company building enterprise solutions.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | QRYPTqrypt.com HQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 35 contacts → |
“Eternal Encryption.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | SEEQCseeqc.com HQ: Elmsford, NY, United StatesReported employees: 11-50 | Elmsford, NY, United States | 11-50 | Exact match | 34 contacts → |
“SEEQC is developing the first digital quantum computing platform for global businesses.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Strangeworksstrangeworks.com HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 31 contacts → |
“Strangeworks is an unconventional computing software company based in Austin, TX.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Eclypseseclypses.com HQ: Boston, MA, United StatesReported employees: 11-50 | Boston, MA, United States | 11-50 | Exact match | 29 contacts → |
“Eclypses is redefining data security for the AI and quantum era.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | ALIROalirotech.com HQ: Boston, MA, United StatesReported employees: 11-50 | Boston, MA, United States | 11-50 | Exact match | 26 contacts → |
“Aliro, The Quantum Networking Company®, offers AliroNet® to run entanglement-based Quantum Networks for applications such as Quantum Secure Communications (QSC), secure access to…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Safelogicsafelogic.com HQ: Vienna, VA, United StatesReported employees: 11-50 | Vienna, VA, United States | 11-50 | Exact match | 22 contacts → |
“SafeLogic’s proven and validated cryptographic solutions enable enduring privacy and trust in the ever-changing digital world.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HAIQUhaiqu.ai HQ: Brooklyn, United StatesReported employees: 11-50 | Brooklyn, United States | 11-50 | Exact match | 21 contacts → |
“Haiqu is a quantum software company developing a new application execution stack for all modalities of near-term quantum computers.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Atlantic Quantumblog.google HQ: Cambridge, MA, United StatesReported employees: 11-50 | Cambridge, MA, United States | 11-50 | Exact match | 20 contacts → |
“Atlantic Quantum is now part of Google Quantum AI.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Zksecurityzksecurity.xyz HQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 17 contacts → |
“Security audits, development, and research for ZKP, FHE, PQC, and MPC applications, and more generally advanced cryptography.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Entrokey Labsentrokeylabs.com HQ: Mclean, VA, United StatesReported employees: 11-50 | Mclean, VA, United States | 11-50 | Exact match | 17 contacts → |
“Entrokey leverages generative AI to produce quantum-resistant random sequences, ensuring enhanced security against future quantum threats.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Eeroq Corporationeeroq.com HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 16 contacts → |
“EeroQ is building a next-generation quantum computer using the technology of today.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Quantum Xchangequantumxc.com HQ: Bethesda, MD, United StatesReported employees: 11-50 | Bethesda, MD, United States | 11-50 | Exact match | 16 contacts → |
“Quantum XChange protects the world’s data in motion from advances in computing and everyday cybersecurity risks.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | American Binaryambit.inc HQ: Kirkland, WA, United StatesReported employees: 11-50 | Kirkland, WA, United States | 11-50 | Exact match | 16 contacts → |
“The only provably quantum-safe security for enterprise data in transit.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 204 company matches
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Quantum computing security companies: dataset insights
September 5, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
204 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
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: September 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 ↗
Questions about this company list
What does Exact match mean for quantum computing security 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 computing security companies did RevenueBase find based in the United States?
The saved snapshot records 204 matching company records, 3,707 tracked contacts and 1,589 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: September 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
Quantum computing security companies by geography
Cite this list
RevenueBase Data Team. Top 25 quantum computing security companies based in the United States. Snapshot: September 5, 2026. https://revenuebase.ai/companies/quantum-computing-security-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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