Last updated: 18 May 2026
These Terms of Service ("Terms") form a legal agreement between you and Siensi Software (a trading name of Siensi Financial Solutions Limited, a company registered in England and Wales). They govern your use of the Siensi Software practice management product at app.siensi.co.uk ("the Service").
By signing up for or using the Service, you agree to these Terms. If you do not agree, do not use the Service.
The Service is a cloud-based practice management tool for accountants. It includes features for client management, deadline tracking, workflow automation, AML record-keeping, email reminders, and document storage.
We strive to provide the Service on a "best effort" basis but do not guarantee uninterrupted availability. We may occasionally need to perform maintenance which may temporarily affect access.
New accounts receive a free 30-day trial of all features. No payment information is required for the trial. At the end of the trial, accounts with 10 or fewer clients move automatically to the Free plan described below; accounts with more than 10 clients will have access limited until a paid plan is chosen. You may cancel at any time during the trial with no obligation.
After the trial, the Service is available on the following monthly plans:
All prices are stated in pounds sterling. We are not currently registered for VAT and no VAT is charged. If we become VAT-registered, VAT will be added to the prices above at the prevailing rate, and we will give you at least 30 days' notice before it is first applied.
Your plan is determined by the number of active clients recorded in your account. Archived and deleted clients do not count towards the limit. If you reach your plan's limit you will be prompted to move up to the next plan before adding further clients; if your client count falls, you may move down a plan, taking effect from the next billing period.
Paid subscriptions are billed monthly in advance. You are responsible for keeping payment details up to date. If payment fails, we will notify you and may suspend your account if not resolved within a reasonable period. Suspension limits access to the Service; it does not delete your data.
Prices may change with at least 30 days' notice. Any change will apply to the next billing period.
The Free plan is offered on the same terms as the paid plans except that no charge is made and support is provided through our published user guide and help pages rather than by email. All of your rights over your own data, including export and deletion, apply equally on the Free plan.
We may change, limit or withdraw the Free plan, or change the client limit that applies to it, by giving you at least 30 days' notice by email. If we do so, you may move to a paid plan, export your data, or close your account.
If a Free plan account is inactive for 12 consecutive months (no logins and no changes to your data), we will email you at the address registered on the account. If the account remains inactive for a further 30 days after that email, we may close it and delete its data. You can export a complete backup of your data at any time from within the Service.
You may cancel your subscription at any time from within the Service or by emailing support@siensi.co.uk.
Cancellation takes effect at the end of the current billing period. We do not offer pro-rata refunds for partial months unless required by law.
Following cancellation, your data will be retained for 90 days to allow reactivation, then permanently deleted. You can download a backup of all your data at any time using the built-in backup feature.
You are responsible for:
You must not:
We reserve the right to suspend or terminate accounts which violate these terms, with reasonable notice except where immediate action is required.
You retain ownership of all data you enter into the Service. We claim no rights to your client data.
Where we process personal data on your behalf, we do so under the terms of our Data Processing Agreement, which forms part of these Terms.
We aim for high availability but do not provide a formal uptime guarantee. Common causes of downtime are upstream provider outages (our database or hosting), which we will work to resolve as quickly as possible.
If you experience a problem, please contact us at support@siensi.co.uk.
The Siensi Software brand, design, and software code are owned by us. You receive a non-exclusive, non-transferable licence to use the Service for the duration of your subscription. No other rights are granted.
Nothing in these Terms limits our liability for death or personal injury caused by our negligence, fraud, or any other liability that cannot be limited by law.
Subject to the above, our total liability arising out of or in connection with the Service is limited to the amount you have paid us in the 12 months preceding the event giving rise to the claim.
We are not liable for:
Either party may terminate this agreement:
We may update these Terms from time to time. Material changes will be notified by email or in-app notice at least 30 days before they take effect. Continued use of the Service after changes take effect constitutes acceptance.
These Terms are governed by the laws of England and Wales. Any disputes will be subject to the exclusive jurisdiction of the courts of England and Wales.
For any questions regarding these Terms: