Company · London
Phasecraft writes algorithms that cut the circuit size needed to run materials simulation and optimisation on today's noisy quantum computers. Founded by Ashley Montanaro, Toby Cubitt and John Morton, with offices in Bristol and London, it raised a $34m Series B in September 2025 co-led by Plural, Playground Global and Novo Holdings. Its Mondrian optimisation platform, launched in October 2025, was adapted for the National Energy System Operator's grid problems with a £1.2m Quantum Catalyst Fund award. A US headquarters in Arlington, Virginia, was announced in September 2026.
Phasecraft is a London company working on quantum software and materials, founded in 2018. It appears as a partner in Quantum Catalyst Fund and Quantum Computing Platform for NISQ Era Commercial Applications. People profiled here include Ashley Montanaro (Co-Founder and CEO) and Toby Cubitt (Co-Founder).
Sources: Phasecraft raises $34 million from Plural, Playground Global and Novo Holdings | The Quantum Insider · Quantum computing company Phasecraft secure $34 million in funding | University of Bristol · Phasecraft launches Mondrian quantum-enhanced optimisation software platform | Quantum Zeitgeist · Virginia lands 19 new quantum jobs with Phasecraft's expansion | Quantum Zeitgeist
Quantum Catalyst Fund
A £15 million SBRI competition, funded by DSIT and Innovate UK, to help the public sector adopt quantum solutions.
Role: Partner
Funding: £15m
Themes: Computing, Sensing, Imaging, Timing and navigation
A Rigetti UK-led consortium that installed and ran a superconducting quantum computer in the UK and offered it over the cloud.
Role: Partner
Themes: Computing, Software and algorithms
Recent articles from Quantum Zeitgeist that mention Phasecraft.
Virginia welcomes Phasecraft, a UK-based quantum algorithms company, establishing its U.S. headquarters in Arlington and creating 19 new jobs.
Image © Quantum Zeitgeist
IEEE Quantum Week 2026 runs in Toronto from 13 to 18 September, carrying the largest programme the conference has published, with 372 technical papers, 47 workshops and 48 tutorials. Eleven keynote speakers lead it. Register now.
Image © Quantum Zeitgeist
The incoming prime minister has reportedly asked officials to draw up plans to abolish DSIT. Here is how that decision could play out for the UK quantum sector, from quiet climbdown to compound failure.
Image © Quantum Zeitgeist
Phasecraft received a $4.5M ARPA-E contract to develop quantum algorithms for catalyst discovery, reducing reliance on critical minerals like iridium.
Image © Quantum Zeitgeist
Research, commercial and investment relationships, by year. Partners with a profile here are linked.
Atom Computing Research 2026
Plural Investment 2025
Recorded on Plural's profile.
Quantinuum Commercial 2025
Google Quantum AI Research 2022
Rigetti Computing Research 2022
IBM Quantum Research 2021
Software platform · Limited access
Software platform · Limited access
Software application · Available
Software platform · Limited access
Chosen by shared specialisms, then location and type.
Company · London · 1 shared specialism
Company · London · 1 shared specialism
Company · London · 1 shared specialism
Company · London · 1 shared specialism
Company data from Entangled Future. News from Quantum Zeitgeist. Last checked 2 October 2026.
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