Company lists · Data refreshed September 2026
Top 25 Post quantum cryptography companies based in the United States
RevenueBase identified 101 post quantum cryptography companies headquartered in the United States as of September 2026 and tracks 693 professional contacts across them, including 287 with verified work emails and 293 with mobile numbers. Austin is the largest hub.
This list covers post quantum cryptography companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 7, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 post quantum cryptography companies based in the United States
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Strong evidence | 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.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 2 | Partial evidence | 42 contacts → | |||
“wolfSSL, the best-tested cryptography, provides embedded security solutions emphasizing speed, size, portability, features, and standards compliance.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 35 contacts → | |||
“Eternal Encryption.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 4 | Partial evidence | 29 contacts → | |||
“Eclypses is redefining data security for the AI and quantum era.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 5 | Partial evidence | 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…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 6 | Partial evidence | 22 contacts → | |||
“SafeLogic’s proven and validated cryptographic solutions enable enduring privacy and trust in the ever-changing digital world.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 7 | Partial evidence | 17 contacts → | |||
“Security audits, development, and research for ZKP, FHE, PQC, and MPC applications, and more generally advanced cryptography.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 8 | Partial evidence | 17 contacts → | |||
“Entrokey leverages generative AI to produce quantum-resistant random sequences, ensuring enhanced security against future quantum threats.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 9 | Partial evidence | 16 contacts → | |||
“Quantum XChange protects the world’s data in motion from advances in computing and everyday cybersecurity risks.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 10 | Partial evidence | 15 contacts → | |||
“EndoSec LLC specializes in products for hardware intrinsic security and cryptography plus services for security design and AT planning.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 11 | Indirect evidence | 15 contacts → | |||
“Q-Net Security produces hardware that creates an impenetrable barrier between defined endpoints within your existing network.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 12 | Partial evidence | 15 contacts → | |||
“SQE is pioneering the future of digital ecosystems with its patented Simulated Quantum Entanglement (SQE) technology.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 13 | Partial evidence | 13 contacts → | |||
“At Secured Quantum Services (SQS), we are at the forefront of building quantum-secure infrastructure for the future.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 14 | Partial evidence | 13 contacts → | |||
“XSOC CORP is at the forefront of cyber-resilient solutions, delivering quantum-resistant, next-generation encryption technologies that safeguard critical data across both…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 15 | Strong evidence | 12 contacts → | |||
“With a focus on cutting-edge cryptography and user-centric design, SENTRIQS empowers organizations to protect their most sensitive information into the quantum age.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 16 | Partial evidence | 11 contacts → | |||
“FortifyIQ cryptographic implementations deliver high-assurance side-channel and fault-injection resistance with minimal overhead compared to conventional implementations…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 17 | Partial evidence | 11 contacts → | |||
“The EnQuanta quantum cyber resilience products are software-only integrations that eliminate the need for either custom hardware or networked callbacks.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 18 | Strong evidence | 11 contacts → | |||
“The US government has mandated that agencies and enterprises responsible for critical infrastructure upgrade cryptography to protect against current and future quantum-based…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 19 | Partial evidence | 10 contacts → | |||
“Global Integrity delivers advanced quantum-resistant encryption technology through three core solutions: dSecure for Microsoft Office, QTel Secure for communications, and the…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 20 | Indirect evidence | 8 contacts → | |||
“The QuSmart GENESIS Governance Agent is an Immutable Agent Governance Orchestrator.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 21 | Indirect evidence | 7 contacts → | |||
“To secure our most vulnerable critical infrastructures, we at Kloch provide innovative encryption solutions to safeguard operational technology (OT) systems with unmatched…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 22 | Partial evidence | 7 contacts → | |||
“Secured2 is a pioneering cybersecurity company specializing in quantum-secure and AI-safe data protection.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 23 | Indirect evidence | 7 contacts → | |||
“At Donoma, we believe that an organization's greatest asset is its intellectual property and collective intelligence of its workforce.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 24 | Strong evidence | 7 contacts → | |||
“PQSecure designs, develops, integrates, and deploys quantum-safe cryptographic IPs in embedded smart IoT devices and clouds with protections against side-channel attacks for…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 25 | Indirect evidence | 7 contacts → | |||
“CyberProtonics is building the trust infrastructure for the agentic internet.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: post quantum cryptography companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names post quantum cryptography companies.
- Partial evidence
- Its own public description names part of post quantum cryptography companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name post quantum cryptography companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 101 post quantum cryptography companies based in the United States
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Post quantum cryptography companies based in the United States at a glance
As of Sep 7, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among post quantum cryptography companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “post quantum cryptography companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names post quantum cryptography companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among post quantum cryptography companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 287 across the full list. 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 7, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names post quantum cryptography companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many post quantum cryptography companies are there based in the United States?
RevenueBase identified 101 post quantum cryptography companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Qusecure, headquartered in San Mateo, tops this list with the largest team on record.
Which city has the most post quantum cryptography companies?
Austin leads with 5 headquartered companies, followed by New York (5) and Lewes (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 287 verified decision-maker contacts tracked across these 101 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 7, 2026.
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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 Smart Search, 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.
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