Supa, a London company that buys local block management firms and rebuilds them around AI, has raised a £21M seed round co-led by 2150 and OpenOcean.

Supa announced the round on 4 November as it came out of stealth after 12 months of quiet building. KOMPAS VC, Actia Capital Partners, HEARTFELT and a group of angels also invested.

A UK lender is providing a separate debt facility to fund further acquisitions and technology.

Who is behind Supa?

Supa was co-founded by chief executive Calum Brannan and Alexis Johnson. The pair previously built Howsy, the lettings startup that Dexters bought in 2022.

The company is based on Moorgate in the City of London and is hiring across the business.

How does Supa's model work?

Supa buys established local managing agents. The teams stay, and most firms keep the names their residents already know.

It then replaces the back office with its own AI operating system. The software handles repairs scheduling, service charge reconciliation, safety and compliance checks, and chasing contractors.

The firms that have joined include Hunters in Sussex, FW Block Management in Hertfordshire, Lamberts in London, Loveitts Longlease, Compass Block Management and DMG Property Management.

Together they manage around 20,000 homes. Supa says revenue has grown more than 700% since its first two acquisitions in late 2025.

Why do investors like the roll-up approach?

Block management is a fragmented, paperwork-heavy market. Many agents run with fewer than ten staff, and residents often complain about slow replies and unclear service charges.

Selling software into thousands of tiny firms is slow. Buying the firms and installing the software directly is faster, and the revenue arrives on day one.

Rahul Parekh, partner at 2150, said property management runs on tools that feel decades overdue. Sam Hields, partner at OpenOcean, called Supa one of the clearest examples of AI improving a real-world service at scale.

What do the sellers get?

Finella Taylor, chief executive of FW Block Management, said preserving her company's legacy mattered, and that Supa understood that.

That pitch matters in a market full of owner-run firms. Many founders want an exit without seeing their name and staff disappear.

What this means for UK founders

Supa is part of a growing trend of AI roll-ups in UK services, where founders buy traditional businesses rather than sell to them. It sits alongside Lette's AI agents for rental leasing in a busy year for UK proptech funding.

The model needs two skills at once: dealmaking and software. Founders considering it should treat acquisitions as a core product, not a side task, as Bizztor's notes on scaling a service business explain.

The test for Supa is whether service quality improves fast enough that residents notice, as the portfolio keeps growing.