W1 and St James's
Funds, family offices and advisory firms
Reporting, client portals and internal systems where the constraint is confidentiality and an audit trail, not headcount.
M3CA, 35 Berkeley Square
A software studio in Mayfair, built for work that has to hold.
M3CA is a software studio in Mayfair, London W1J 5BF. Custom software, data and AI systems engineered by the senior people you meet in the first session, scoped in writing and quoted against your brief.
Who we work with from here
Mayfair is the address, the work is everywhere
Across central London
Clinical, education and public sector teams
Pathways, referrals and case handling that have to hold up on a busy day, with the records to prove what happened.
Wherever the work is
Operators outside London and overseas
Berkeley Square is the studio, not the boundary. Branches in Atlanta and Paris cover the same work across time zones.
Why the studio matters
Three reasons clients come to Berkeley Square
01
Close enough to sit in the room
Green Park and Bond Street are minutes away, so a working session takes an hour of your day rather than a morning.
02
A studio, not a serviced desk
Design, engineering, data and a film setup in one place, which is why a build does not stall between suppliers.
03
Senior people you can name
The person who scopes your work is on the build. One contact from first session to the release after launch.
Proof
Software written here, running elsewhere
Client identities are withheld where confidentiality applies. References can be arranged during a qualified conversation.
Find the studio
35 Berkeley Square, Berkeley Suite, Mayfair, London W1J 5BF
Nearest stations are Green Park and Bond Street. Visits are by appointment so the right people are in the room rather than in a meeting upstairs.
Mayfair studio
Based in Mayfair, working across London
M3CA LTD35 Berkeley Square, Berkeley Suite, MayfairLondon W1J 5BF, United Kingdom
+44 20 3978 6347
info@m3ca.com
Where we work
We work on site with teams across central London and remotely with clients throughout the UK. Most projects run from the Mayfair studio, with the engineering practice in the same building.
- Mayfair
- City of London
- Westminster
- Shoreditch
- Camden
- Kensington and Chelsea
- Islington
- Southwark
- Canary Wharf
- Greater London
Start
Tell us what has to work by when.
Send the brief and a senior member of the studio replies with an honest read on scope, sequence and whether we are the right studio for it.