Mosyn

Terms and Conditions of Use

Version 2026-08-14. These terms were last updated on 14 August 2026.

1. Who we are and what these terms cover

Mosyn is an operating system for letting agents, provided by Mosyn Ltd, a company registered in Northern Ireland with company number NI739623 and registered office at 31 Cadogan Park, Belfast, BT9 6HH. You can contact us at support@mosyn.co.uk.

These terms are a contract between Mosyn Ltd (we, us) and the business that opens a workspace (you, the Customer). Mosyn is a business-to-business service for letting agents and landlords. It is not offered to consumers, and consumer protection law that applies only to consumers does not apply to this contract.

By ticking the acceptance box, or by opening a workspace and using the Service, you agree to these terms. If you accept on behalf of an agency or company, you confirm that you have authority to bind it. If you do not agree, do not use the Service.

2. Definitions

  • The Service: the Mosyn platform, including the web application, public forms it hosts for you, messaging, document generation, AI features and any related support.
  • Customer Data: all data you or your team put into the Service or instruct it to collect, including personal data about your landlords, tenants, guarantors, applicants and contractors.
  • Demo Workspace: a free, time-limited workspace opened from our demo page before any subscription is taken.
  • Subscription: a paid plan billed through our payment provider, Stripe.

3. The demo workspace

A Demo Workspace is a real workspace with a clock on it. The clock starts when you import your data and runs for the short period shown in the product. While a Demo Workspace is open:

  • every outbound email and text message the Service would send is redirected to you, the person trying the demo, and is never delivered to the landlords or tenants in the data you imported;
  • bank connections and document extraction are not available;
  • we make no promise that demo data will be preserved. If you do not subscribe, the workspace and everything in it is deleted 7 days after the demo ends;
  • the Service is provided as seen, free of charge, for evaluation only.

4. Subscription, fees and billing

The current plan is Mosyn Standard at £50 per month, plus VAT where applicable. Payment is collected by Stripe on a recurring basis using the card you provide. A 14 day free trial applies to new subscriptions. Your card is taken up front and the first charge is made when the trial ends, unless you cancel first.

  • You can cancel at any time through the billing portal. Cancellation takes effect at the end of the current billing period and we do not refund partial periods.
  • We may change our prices. We will give you at least 30 days notice by email before a price change takes effect, and you may cancel before it does.
  • If a payment fails and remains unpaid after we have notified you, we may suspend access to the Service until the account is settled.
  • Fees are stated exclusive of VAT unless we say otherwise.

5. Your data and data protection

As between you and us, you own Customer Data. For personal data in Customer Data, you are the controller and we are your processor under UK data protection law, including the UK GDPR and the Data Protection Act 2018. This section forms the data processing terms between us.

As your processor, we will:

  • process personal data only to provide the Service and only on your documented instructions, which include your configuration of the Service and these terms;
  • make sure anyone we allow to process the data is bound by confidentiality;
  • apply appropriate technical and organisational security measures, including encryption in transit, access controls, routine backups and tenant isolation at the database level;
  • tell you without undue delay if we become aware of a personal data breach affecting your data;
  • give you reasonable assistance with data subject requests, security, breach notification and impact assessments;
  • delete or return personal data when the contract ends, as described in section 16, except where the law requires us to keep it;
  • make available the information reasonably needed to show we meet these obligations.

You authorise us to use the following sub-processors, each engaged on terms that protect your data to a comparable standard: Supabase (database and file hosting, EU region), Vercel (application hosting), Stripe (payments), Postmark (email delivery), Twilio (text messages and WhatsApp), TrueLayer and GoCardless (open banking data), DocuSign (e-signature, where you enable it), Google (calendar, where you connect it), and AI model providers accessed through Vercel AI Gateway (AI features). We will notify you of any change to this list, and you may object on reasonable data protection grounds.

You warrant that you have a lawful basis for the personal data you put into the Service, and for every message you instruct the Service to send. You are responsible for your own privacy notices to your landlords, tenants and other contacts.

6. Client money

The Service reads bank data and reconciles it against what is owed, keeping records of the result. It does not hold client money and it does not move client money. Where the Service records a payment instruction, the payment itself is made by you through your own bank. You remain solely responsible for how client money is handled, for the operation of your client accounts, and for compliance with every rule that applies to your business, including client money protection and deposit scheme requirements.

7. Compliance tooling, not advice

The Service includes tools built around housing law in Northern Ireland and England: certificate registers, notice templates, deadline tracking and generated documents. These are tools, not legal advice. Laws change, and your circumstances may differ. You are responsible for checking that any notice, document, deadline or calculation the Service produces is correct and lawful before you rely on it, and for taking your own legal advice where it matters.

8. AI features

Parts of the Service use artificial intelligence to draft messages, extract data from documents, propose matches for bank transactions and structure information. AI output can be wrong. The Service is designed so that consequential actions need a human confirmation, and you agree to review AI output before acting on it. AI output is not the source of truth for money or compliance and we accept no responsibility for decisions taken on unreviewed AI output.

9. Communications sent on your behalf

The Service sends messages to your contacts as your agent (by email, and by SMS and WhatsApp where enabled), on your instruction or under rules you configure. You are responsible for the content and lawfulness of those messages, including compliance with the Privacy and Electronic Communications Regulations. We may refuse to send, or stop sending, messages that we reasonably believe are unlawful or abusive.

10. Open banking

Bank feeds are read-only and are provided through regulated open banking providers. Your connection to your bank is made under the terms published by the relevant provider, and consent is given by you to them. Bank connections are available on active paid subscriptions only. We never receive your online banking credentials.

11. Acceptable use

You agree not to:

  • use the Service unlawfully, or upload data you have no right to hold;
  • resell, sublicense or provide the Service to anyone outside your business;
  • reverse engineer the Service or attempt to extract its source code;
  • probe or test the security of the Service without our written permission;
  • use automated means to scrape the Service, or use it to send bulk unsolicited messages.

We may suspend access where we reasonably believe this section has been breached, and will tell you why unless the law prevents it.

12. Intellectual property

We own the Service and everything in it apart from Customer Data. You get a non-exclusive, non-transferable right to use the Service for your business while these terms are in force. You grant us a licence to host and process Customer Data, and to transmit it where you instruct, as needed to provide the Service. If you give us feedback or suggestions, we may use them without restriction or payment.

13. Availability and changes to the Service

We work to keep the Service available and we take backups, but we do not guarantee uninterrupted service and these terms include no uptime commitment. We may take the Service down for maintenance, and we may change or improve features over time. If we materially reduce the core functionality you pay for, we will give you notice, and you may cancel under section 4.

14. Liability

Nothing in these terms excludes or limits liability that cannot lawfully be excluded or limited, including liability for death or personal injury caused by negligence and for fraud.

Subject to that:

  • neither of us is liable to the other for loss of profit, loss of business, loss of goodwill or any indirect or consequential loss;
  • our total liability to you, however arising, is capped at the fees you paid us in the 12 months before the event giving rise to the claim;
  • for a Demo Workspace or any other free use, where no fees have been paid, our total liability is capped at £100;
  • we are not liable for failures caused by your own systems, your bank, or events outside our reasonable control.

You accept that the caps above are reasonable given the price of the Service and that you remain responsible, as the regulated business, for your own legal and financial obligations to your clients.

15. Indemnity

You will indemnify us against costs, claims, damages and losses we suffer because Customer Data, or your use of the Service, infringed the rights of a third party or broke the law, including claims from people you messaged through the Service.

16. Term, termination and your data on exit

These terms apply from the moment you first accept them and continue while you have a workspace. You may stop using the Service and cancel at any time. We may terminate on 30 days notice, or immediately if you materially breach these terms and do not fix the breach within 14 days of being told about it, or if you become insolvent.

When the contract ends, you have 30 days to export your data using the tools in the product, or to ask us for a copy in a common machine-readable format. After that we delete Customer Data, except records we are legally required to keep, and except append-only audit and financial records retained only as long as the law requires. Expired demo data is handled under section 3.

17. Changes to these terms

Each version of these terms carries a version date, shown at the top. We may update them from time to time. For material changes we will give you at least 30 days notice by email or in the product before the new version takes effect. If you keep using the Service after that date, the new version applies. If you do not agree to a change, cancel before it takes effect.

18. General

  • You may not assign this contract without our consent. We may assign it to a group company or a buyer of our business.
  • Formal notices go by email: to us at support@mosyn.co.uk, to you at the email address on your account.
  • These terms, together with any order or plan details shown at purchase, are the entire agreement between us about the Service.
  • If part of these terms is found unenforceable, the rest still stands.
  • A delay in enforcing these terms is not a waiver of them.
  • No one other than you and us has any rights under this contract.

19. Governing law

These terms are governed by the law of Northern Ireland, and the courts of Northern Ireland have exclusive jurisdiction over any dispute arising from them, except that we may enforce payment in any court that has jurisdiction over you.

Feedback