agentOS PropTech Group is a Cardiff-based software company trusted by hundreds of UK estate and letting agents. Their three integrated products — agentOS CRM, agentPay automated rent collection, and Calmony digital client accounts — are standalone or fully connected, depending on what your agency needs. Acquired by Volaris Group in January 2025, with independent leadership and long-term investment backing.
Most estate agency software either locks your data inside one closed system, or forces you to bolt together products from different vendors that share no data model. agentOS PropTech Group builds three products designed to work as a group — open API CRM, automated rent collection, and a regulated digital client account — all from a single Cardiff-based team that has been building for UK lettings since before the cloud era.
agentOS is built as an open API platform. It is designed to connect you to the wider PropTech ecosystem — not to own it. If you have a preferred referencing supplier, a preferred inspection tool, a preferred maintenance platform, the open API is how agentOS connects to all of them without proprietary middleware.
agentPay automates the property management payment process. Rent collection, landlord payments, and tenant reminders run without manual intervention from your team. The money moves, the reconciliation happens, and your property managers spend Friday afternoon on things that need human attention.
Calmony is a purpose-built digital client account for lettings and management agents, block management, and Right to Manage companies. It is specifically designed for the compliance requirements of holding client money in the UK letting sector — not a general business bank account adapted for the purpose.
agentOS's open API and modular product structure means you take what you need. If you only need the rent automation, agentPay is standalone. If you need the full suite, agentOS, agentPay and Calmony are fully integrated. You do not pay for a monolithic platform to get access to one piece of functionality.
agentOS PropTech Group builds agentOS, agentPay and Calmony. Each product solves a distinct operational problem for UK estate and letting agents. Each is available as a standalone, and all three integrate fully when deployed together. Based in Cardiff, with Volaris Group backing and independent management.
An operating system for estate and letting agents built around customisable records — you define what information matters to your business and agentOS reflects it. Open API architecture connects agentOS to your wider PropTech stack: referencing, inspection, compliance, maintenance, and any other tool your agency uses. Estate agency, lettings, client accounting and property management in one platform.
agentPay automates property management payments — rent collection, landlord disbursements, and tenant arrears reminders. The platform handles the payment flow so your property managers do not need to manage it manually. As your managed portfolio grows, agentPay scales with it without proportional increases in administrative headcount.
Calmony is a purpose-built digital client account for lettings and management agents. Designed specifically for the compliance requirements of holding client money in the UK — for letting agents, block management companies, and Right to Manage organisations. Not a business bank account: a regulated, purpose-built product for property management money.
All three agentOS PropTech Group products are standalone but designed to integrate completely. When deployed together, data flows between the CRM, the payments automation, and the client account without re-entry or reconciliation delays. The integrated suite is the full operating system for a UK letting agency's financial and operational workflows.
agentOS is built with an open API as a core design principle. Third-party PropTech — inspection platforms, referencing services, maintenance tools, marketing portals — can connect to the CRM without custom development projects. For agencies building a best-of-breed PropTech stack, agentOS is the connective tissue, not the gatekeeper.
agentOS PropTech Group joined Volaris Group in January 2025. The management team continues to lead the business under its existing direction, with access to Volaris's long-term investment capital, operational expertise and global network of vertical market software companies. For agencies on agentOS, this means product investment backed by a stable, committed parent — not a VC exit timeline.
Products built for UK estate and letting agents
Kerfuffle members get prioritised onboarding and a named account manager from the agentOS team. The modular product structure means you start with what you need and expand when you are ready.
Decide whether you need the CRM, the rent automation, the client account, or the full integrated suite. The agentOS PropTech Group team will scope the right configuration for your agency's size, portfolio type, and existing technology — without overselling you a platform you will not use.
The agentOS team handles the migration from your current system. Your property records, landlord and tenant data, and transaction history move across to the new platform with the support of a named account manager. Kerfuffle members get prioritised onboarding — you skip the standard queue.
Use the open API to connect agentOS to the inspection, referencing, compliance, and maintenance tools your agency already uses. The integration work is significantly lighter than with closed CRM systems — the open API is designed for connection, not restriction.
Once agentOS CRM is live, deploy agentPay and Calmony to automate the money flow. Rent collection, landlord disbursements, arrears management and client account compliance all move from manual processes to automated workflows — reducing risk and freeing your team from the administrative cycle.
agentOS PropTech Group is a Kerfuffle-listed partner. Members of Kerfuffle get more than a standard software demo — you get a commercial conversation with your Kerfuffle account manager in the loop before any contract is signed.
Standard demo route
Off-the-shelf pricing
Your terms, reviewed before you sign
Pricing for agentOS, agentPay and Calmony is agreed per agency based on portfolio size, product selection and integration requirements. Book a demo and the agentOS PropTech Group team will scope it live, with your Kerfuffle AM in the room.
agentOS PropTech Group's Kerfuffle profile has 24 verified agent reviews, integration details, awards and context on the three-product suite. Open in a new tab — your spot on this page is saved.
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A 30-minute walkthrough of agentOS CRM, agentPay rent automation and Calmony digital client accounts — how they work standalone, how they integrate, and what the PropTech connectivity via open API looks like for a live UK letting agency.
How estate and letting agents on agentOS use the open API to connect their PropTech stack, how agentPay eliminates manual rent collection, and how Calmony provides a purpose-built digital client account for compliance. Includes a live product walkthrough and Q&A with the Cardiff-based team.
The open API approach is what made the difference for us. We had specific tools we wanted to keep for inspections and referencing, and agentOS connected to both without requiring us to switch suppliers. The CRM runs our operations and the PropTech we chose connects into it — that is the opposite of how most agency software is sold.Operations Director, independent lettings agency agentOS CRM and agentPay, South Wales
agentOS PropTech Group builds specifically for the operational and compliance needs of UK property management — not a generic CRM adapted for estate agency use. The open API design principle means your existing PropTech stack connects in, not out.
PropTech That Pays Back is the Kerfuffle initiative that rewards estate agents with kredits when they actually use what they've bought — not just when they sign the contract. Agentos Proptech isn't on the platform presently. If you'd like to see Agentos Proptech added and arrange a demo as part of the rollout, register your interest below and we'll get back to you.
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