Phasecraft
Phasecraft develops quantum computing algorithms for practical applications. The 53-person UK company has raised $56M, most recently in a Series B round in September 2025.
The growth story
Phasecraft grew from 16 to 53 employees between 2022 and 2026, raising $56M along the way, most recently a Series B in September 2025.
About
Phasecraft creates mathematical frameworks to enable quantum computers to solve real-world problems. Its tools are aimed at researchers and companies working on quantum computing applications.
The company has grown rapidly since its 2019 founding, reaching 53 employees. Its $56M in funding includes backing from AlbionVC, LocalGlobe, and the Greater London Authority, with a Series B round closed in September 2025.
Founders and leadership
Phasecraft is led by three quantum scientists: Toby Cubitt, Ashley Montanaro, and John Morton. Its largest function is research, which accounts for 19 of its 53 employees.
The Phasecraft org chart
Ashley Montanaro (Co-founder and CEO) leads 16 mapped leaders with 4 direct reports. Click +N to expand a team; names link to the person’s public profile.
- Co-Founder, CTO & CSCIO Phasecraft / Professor of Quantum Information, University College LondonExecutive
Departments, and which ones grew
Headcount by function: Research 21 (+31% YoY), Business Development 7 (+17% YoY), Engineering 7 (0% YoY), Education 5 (-37% YoY).
Talent flow
Phasecraft draws heavily from UK universities, particularly Bristol, UCL, and Imperial College London. Alumni have gone on to quantum computing firms like Riverlane and PsiQuantum, as well as tech companies like Google.
Most common previous employers of Phasecraft staff: University of Bristol (4), UCL (4), Imperial College London (3), King's College London (3), Google (2), University of Oxford (2). Former Phasecraft employees most often moved to Plural (2), Riverlane (2), PsiQuantum (2), Google (1), Marshall Wace (1), R-ai Technologies (1).
Alumni worth knowing
Web traffic
Traffic mix: 36% direct, 45% search, 3% social, 0% paid.
What this company is made of
Most common skills at Phasecraft: Python (Programming Language) (23), Research Skills (22), Physics (13), LaTeX (13), Microsoft Office (12), C++ (12), Data Analysis (11), MATLAB (10).
Where the team actually sits
Phasecraft people are concentrated in England, United Kingdom (19), United Kingdom (8), District of Columbia, United States (3), Scotland, United Kingdom (2).
Search footprint
Phasecraft attracts about 72 organic search visits a month, traffic worth roughly $0K a month if bought through ads. It gained 10 ranking keywords and lost 5 in the last period.
What employees say
- Compensation
- 5.00 / 5
- Career opportunities
- 4.00 / 5
- Senior management
- 4.00 / 5
- Work-life balance
- 5.00 / 5
Frequently asked
Phasecraft has 53 employees as of September 2026.
Phasecraft has raised $56M in total, most recently a Series B round in September 2025.
Phasecraft was founded in 2019 by Ashley Montanaro, Prof Toby Cubitt.
Ashley Montanaro (Co-founder and CEO) sits at the top of Phasecraft's reporting structure, with 4 direct reports.
The most common previous employers of current Phasecraft staff are University of Bristol (4 people), UCL (4 people), Imperial College London (3 people).
Former Phasecraft employees most often move to Plural (2), Riverlane (2), PsiQuantum (2).
Phasecraft attracts about 72 organic search visits a month, worth roughly $0K a month in equivalent ad spend.
The most common skills among Phasecraft staff are Python (Programming Language), Research Skills, Physics, LaTeX, Microsoft Office.
Phasecraft staff are concentrated in England, United Kingdom (19), United Kingdom (8), District of Columbia, United States (3).
Phasecraft has about 21 people in Research, up 31% over the past year, as of September 2026.
Phasecraft has about 7 people in Business Development, up 17% over the past year, as of September 2026.
Computed from 42 current and 34 former Phasecraft profiles, as of September 2026. Source: Crustdata.
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