Post Quantum vs Unit21

Neither company has publicly disclosed a valuation, making a definitive size comparison difficult. Post Quantum employs 1-50 people, while Unit21 has 100-500 employees.

Unit21 has raised more in total funding at $75M, compared to Post Quantum's $30M — a gap of $45M.

Unit21 holds the higher Awaira Score at 60/100, compared to Post Quantum's 45/100. The Awaira Score is a composite metric factoring in valuation, funding, stage, team size, and market presence — a 15-point gap that reflects meaningful differences in scale or traction.

Post Quantum was founded by Andersen Cheng in 2009. Unit21 was founded by Trisha Kothari in 2018. Visit each company's profile on Awaira for a full founder biography.

Post Quantum: Post Quantum develops cryptographic security products designed to withstand attacks from quantum computers, offering post-quantum encryption protocols, secure communications applications, and identity verification technology that protect data against both classical and quantum computing threats. The London company is among the longest-established organisations in the quantum-safe cryptography market, having focused on this security category before it gained mainstream attention following NIST post-quantum cryptography standardisation efforts.\n\nThe company raised approximately $30 million in venture funding and counts government agencies, financial institutions, and critical infrastructure operators among its clients. Post Quantum products include an encrypted communications app and a software library implementing post-quantum cryptographic primitives, as well as consulting services for organisations planning cryptographic migrations. The company has participated in NATO and government procurement processes for quantum-safe communications.\n\nPost Quantum competes with Quantinuum, IBM Quantum Safe, and PQShield in the post-quantum cryptography market, as well as larger cybersecurity vendors integrating quantum-safe features into existing product suites. The NIST finalisation of post-quantum cryptography standards in 2024 significantly accelerated enterprise and government planning for cryptographic migration, expanding the commercial opportunity for specialist vendors. The harvest now decrypt later threat model, where adversaries collect encrypted data today to decrypt once quantum computers mature, is creating compliance urgency in defence, financial services, and national security organisations. Unit21: Unit21 provides a fraud and risk operations platform that enables compliance and fraud teams at financial institutions and fintechs to build, test, and deploy transaction monitoring rules and machine learning models without requiring data science resources. The platform covers transaction fraud, account takeover, ACH and check fraud, and anti-money laundering (AML) case management in a unified workflow.\n\nThe company raised approximately 75 million USD and serves hundreds of financial services customers including neobanks, payment processors, crypto exchanges, and traditional banks looking to modernize legacy fraud operations with configurable, model-driven risk infrastructure. Unit21 no-code rule builder allows risk analysts to respond to new fraud patterns within hours rather than weeks.\n\nFinancial fraud losses in the United States exceed 10 billion USD annually and are growing as faster payment rails reduce the window for detection. Unit21 competes with legacy vendors like NICE Actimize and SAS as well as newer entrants including Sardine and Alloy, differentiating through its analyst-friendly interface and the speed with which risk teams can iterate on detection logic without engineering dependencies.

Post Quantum was founded first in 2009, giving it 9 years of additional market experience. Unit21 was founded later in 2018. In AI, even a year or two of head start can translate into significantly more training data, customer relationships, and institutional knowledge.

Post Quantum has approximately 1-50 employees, while Unit21 has approximately 100-500. A larger team often signals higher revenue or venture backing, but in AI, smaller teams are increasingly capable of building at scale.

Yes, Post Quantum and Unit21 are direct competitors — both operate in the AI Security space and likely target overlapping customer segments. This comparison is especially relevant for buyers evaluating both platforms.