Terms of Use

Effective from: 22 October 2026. Updated 22 October 2026.

This is an English translation of the Vietnamese Điều khoản sử dụng. If the two versions differ, the Vietnamese version prevails.

This version replaces the previous one. Accounts registered from 22 October 2026 are bound by this version as soon as they accept it. For accounts that accepted the previous version, this version applies 30 days after 22 October 2026; until then, the previous version continues to apply.

1. What Soluta is

Soluta is accounting ledger software for businesses in Vietnam, provided by Công ty TNHH Soluta (tax ID 0110922021, address Tầng 29, Tòa Đông Lotte Center Hà Nội, số 54 Liễu Giai, Phường Giảng Võ, Thành phố Hà Nội, Việt Nam). You use Soluta in one of two ways:

Through your AI assistant (Claude, ChatGPT…), with the connector https://mcp.soluta.vn/mcp.
Through other tools Soluta provides from time to time.

Soluta stores accounting books, checks basic rules (debits = credits, correct accounts, correct counterparties, legal basis still in force, matching documents), looks up legal documents and drafts proposed journal entries, tax returns and reports.

Soluta provides the service for the business activities of businesses, household businesses and organisations, not for personal or household consumption.

Definitions

Customer (“you”): the business, household business or organisation that uses Soluta, through the account holder and the people given access.
Working day: Monday to Friday, excluding public holidays and Tet under Vietnamese law.
Confirmed email: the sign-in email of the book owner’s account.

2. You decide and you are responsible

You are responsible for the accuracy, completeness and lawfulness of the figures, documents and information that you (or your AI assistant at your request) enter into Soluta. Soluta is not responsible for wrong results arising from input that is wrong, incomplete or invalid. Soluta remains liable under the law for faults of the Soluta software itself.

The books change only when you approve. Proposals drafted by AI are only suggestions. You check them before approving.

Soluta is not an accounting, audit or tax advisory service, and does not guarantee results. You are responsible for the accuracy of your books, tax returns and reports. You sign, file and answer to the tax authority and other regulators.

The software, the document library and the proposals are provided as is. Soluta does not guarantee that they are complete, run without interruption, are free of errors, or fit your particular purpose. Features marked “beta” may change or stop.

Legal citations in Soluta come from a document library compiled by Soluta. Documents can change, so check the original text when needed.

3. AI assistants and third-party services

When you use Soluta through an AI assistant with an MCP connection (Claude, ChatGPT, Grok…):

That is a service you choose and pay for, under that provider’s terms. Their servers are outside Vietnam.
Soluta returns data to the assistant only when you connect it and allow it. Content you put into the conversation and the results Soluta returns pass through the AI provider.

Before you put data into an AI assistant, you are responsible for making sure the data is protected as the law requires. When personal data in your books (employees, customers, suppliers, bank statements…) is processed on a platform outside Vietnam, that is a cross-border transfer of personal data (Article 20 of Law 91/2025/QH15). You are the party making the transfer, so you:

have a lawful basis to process that data (the consent of the data subjects, or a case where the law does not require consent);
prepare and file the cross-border personal data transfer impact assessment when the law requires it;
choose a suitable plan and settings with the AI provider, for example a business plan with a data processing agreement, or turning off the use of data for training;
put in only the data needed for the task at hand, and mask or remove what is not needed.

Bank statements, payroll and identification numbers are sensitive personal data and need extra care.

Each time the books are written, the assistant must ask you. If you set the assistant to “Always allow”, it can write without asking again. You are responsible for that setting.

Soluta does not control, and is not responsible for, the services of third parties (Anthropic, OpenAI, Google, Casso and its payOS service, banks…), including how they process data, their errors and interruptions, or changes to their features, prices and policies.

Data connections through Cas Link

The Pro and Team plans let invoices and bank transactions flow into your books automatically, through the Cas Link service of Công ty TNHH Casso.

What can be connected: your business’s incoming and outgoing e-invoices on the tax authority’s e-invoice portal; business results and filed financial statements on eTax; transactions and balances of your business bank accounts. The number of bank accounts you can connect depends on your plan (Pricing).
How to link: the book owner signs in to Soluta with two-factor authentication, opens Settings › Data connections, chooses what to connect and clicks «Link». The page moves to Cas Link. You sign in to your bank or tax portal account directly on the page of Casso, the bank or the tax authority (possibly with an OTP code), review the scope of data and confirm. Soluta does not receive or store that password. The page then returns to Soluta and shows «Linked».
After linking: Soluta fetches new data periodically. You can click «Fetch now» when needed, at most once every 6 hours for each item. Incoming data only becomes proposed journal entries; the books change only when you approve (section 2). Soluta only reads: it does not move money, file returns or change anything at the bank or on the tax portal.
Unlinking: you can unlink at any time under Settings › Data connections, or in the Cas ID app. From then on Soluta stops fetching data; entries already booked stay in the books. If the bank or the tax authority changes the password, or the authorisation expires, the link stops and you need to link again.
Responsibility: you warrant that you have the right to authorise access to those accounts on behalf of the business, and you compensate Soluta if you link an account without that right (section 16). The data comes from banks and the tax authority through Casso. Soluta is not responsible for source data being wrong, incomplete, late or interrupted on their side, or for Casso stopping or changing its service.

4. Accounts

The person who opens the account is at least 18 years old, has full civil legal capacity, and is entitled to accept these Terms on behalf of the business, household business or organisation.
One account per person. Do not share passwords.
The book owner grants access to others (accountant, chief accountant, view-only) within the number of people in the plan.
You are responsible for keeping your account secure and for telling Soluta immediately if you suspect unauthorized access.

5. Prices and payment

Prices

Prices are per company (one set of books), published at soluta.vn.
Prices are per month and include VAT. You pay exactly the price shown.
The invoice shows the price before tax and the tax separately, at the rate on the invoice date: 8% until 31/12/2026, then 10% (unless a further reduction applies).

Billing period

Paid in advance for 3, 6 or 12 months, counted from the activation date. There is no 1-month period.
Your plan renews when you pay for the next period. At least 7 working days before the due date, Soluta emails you a reminder with a payment link. If you do not want to renew: turn off the reminders under Settings › Plan & billing, or do not pay.
Not paid by the due date: Soluta pauses new entries. You can still read the books and download your data within the period in section 8.

How to pay

Only the account owner can pay.
Payment by bank transfer using a QR code that payOS (a Casso service) creates for each order. The money goes directly to the bank account of Công ty TNHH Soluta; payOS does not hold it. Scan the code with your banking app and keep the amount and transfer description shown on the code. Your plan is activated when Soluta receives the payment.

Invoices

Soluta issues an e-invoice for each payment, at the time the law requires, and sends it to the email you confirmed.
Invoice details (name, tax code, address, email) are entered by you and confirmed twice. You are responsible for these details.
Details wrong because of what you entered: Soluta adjusts or replaces the invoice only where the law requires it, on a written request from the account owner with the agreement record, within 15 working days of receiving a complete file. You bear the consequences of the wrong details.

Refunds

The fee for each period covers the whole period and is paid in advance. You can stop at any time. Under this agreement, if you stop mid-period, the rest is not refunded; the plan runs to the end of the period.
Soluta refunds the unused part, by the method you paid with, within 30 days of receiving a complete written request from the account owner, when:

(a) Soluta charged you wrongly or twice;

(b) Soluta stops the service, or locks the account through no fault of yours;

(c) you do not agree to a change of terms or prices under section 15 and end the contract before the change takes effect;

(d) other cases required by law.

Add-on plans

An add-on plan (for example Soluta Finance) can only be bought together with a Plus, Pro or Team plan that is still active, for that same company. There is no trial. Prices, periods and limits follow the Pricing page. Periods, renewal and refunds are as for the main plan.

Discount codes

Soluta may issue discount codes for individual programmes. The discount amount, the plans and periods it applies to, the validity period and the number of uses are published together with the code.
The price after the discount is shown before you pay and is the price stated on the invoice.
Codes cannot be exchanged for cash and cannot be combined with other codes unless the programme states so. Refunds (if any) are calculated on the amount you actually paid.

Launch offer

The first 50 accounts that prepay the Pro plan for 12 months pay 899,000 VND/month (VAT included) for the first 12 months. Each account gets one place, for one company. Places are allocated in order of successful payment. After the first 12 months, renewal is at the list price on the Pricing page. Cannot be combined with discount codes.

AI fees

When you use Soluta through your own AI assistant, you pay the AI fees to that provider.

6. Acceptable use

You may not:

use Soluta to keep false books, hide transactions, evade tax, launder money or finance terrorism;
attack, scan or bypass security; access books that are not yours;
use it automatically at a rate that causes overload. Each plan has a limit on requests per hour (section 13);
collect, scrape or copy Soluta content in bulk by automated means, including the legal-document library Soluta compiles and edits, beyond normal use through an AI assistant or tools Soluta provides;
use Soluta’s output to train or fine-tune AI models, or to develop products or services that compete with Soluta;
resell, sublicense or provide Soluta to others as a service without Soluta’s written consent;
reverse engineer, decompile, decrypt or otherwise try to obtain the source code of Soluta software, except where the law allows it.

Your own accounting books are not covered by these restrictions: you export and use your books as set out in section 7.

7. Data and intellectual property

The accounting books are yours. You can export them at any time (PDF, Excel, Word).
Soluta does not store original document files. You keep the originals yourself, and under the Law on Accounting you are obliged to retain your books, documents and reports. Soluta records only the document details needed for the entry and a fingerprint of the file.
The software, the document library compiled and edited by Soluta, and the Soluta name and logo belong to Công ty TNHH Soluta. You may use them during your plan period, under these Terms.
Feedback and suggestions you send: Soluta may use them to improve the product, free of charge and without time limit.
Soluta may create and use anonymised statistics, from which no business or individual can be identified, to operate and improve the service.
How Soluta processes data: see the Privacy Policy.

8. Ending the service

Retention after you stop. You can stop at any time. After the contract ends (or your plan is overdue and not renewed), the books are kept for 30 days in read-only mode so that you can view them and download all your data. Soluta reminds you by email 7 days before deletion. After 30 days, Soluta deletes the books. You can ask for earlier deletion. Under the Law on Accounting, retaining books, documents and reports is your obligation: download them before the period ends.

Ending the contract. You end it by turning off renewal under Settings › Plan & billing, or by emailing info@soluta.vn. Soluta confirms by email within 3 working days of receiving your notice. The contract ends on the last day of the period you have paid for; until then the plan keeps running. Refunds follow section 5.

Maintenance and interruptions. Soluta may suspend the service temporarily for maintenance or upgrades, with at least 24 hours’ notice by email or on soluta.vn. Where an unexpected incident must be handled at once, Soluta notifies you as soon as it can.

Suspending or locking an account. Soluta may limit, suspend or lock an account immediately, without prior notice, when: you breach section 4 or section 6; payment is overdue (section 5); it is necessary to prevent a security risk to the system or to other customers; a competent state authority requests it. Soluta states the reason after the suspension, unless the law or a competent authority does not allow it. If your account is locked, you can still request an export of your books, unless a competent authority requires otherwise.

Termination for breach. If you breach section 4 or section 6, Soluta may end the contract immediately and notify you by email. Fees for the current period are not refunded. You can still download all your books for 30 days from the termination date, unless a competent authority requires otherwise.

9. Limitation of liability

To the extent permitted by law:

(a) Soluta is not liable for indirect, incidental or consequential damages, including lost profits, revenue or goodwill, lost data, business interruption and the cost of replacement services;

(b) Soluta does not bear fines, late-payment interest or tax arrears from books, tax returns or reports you approved or filed, unless caused by a calculation error of the Soluta software;

(c) Soluta’s total liability for all claims relating to one company does not exceed the amount you paid for that company in the 3 months before the event causing the damage; for a free plan, Soluta does not compensate damage.

This limitation does not apply where Soluta causes damage intentionally, or where the law does not allow such a limitation.

10. Governing law

The law of Vietnam. In a dispute, the parties negotiate for 30 days from the date one party sends a written request; failing that, the dispute is settled by the competent court where Công ty TNHH Soluta has its head office.

11. Complaints

Send a complaint by email to info@soluta.vn or via soluta.vn/en/khieu-nai. State your account, the issue, when it happened, and attach evidence if any.

Soluta confirms receipt within 3 working days and replies with the outcome within 15 working days from receiving complete information.

If you disagree with the outcome, you may continue negotiating, use mediation, contact the competent state authority, or go to court under section 10.

Step-by-step procedure and time limits for each type of issue: soluta.vn/en/khieu-nai.

12. Rights and obligations of Soluta and of you

On soluta.vn, Soluta both operates the site and provides the service.

Soluta is responsible for

publishing its conditions, prices and policies in full on soluta.vn;
charging exactly the published price (section 5);
running the service safely and reliably, and giving notice before maintenance (section 8);
protecting your data under the Privacy Policy;
receiving and resolving complaints (section 11);
limiting, suspending or locking an account in the cases in section 8, with the reason stated;
cooperating with competent state authorities as required by law.

You have the right to

full information about the service, prices and conditions before you pay;
choose a payment method from those Soluta offers (section 5);
have your data protected under the Privacy Policy, and export your books at any time (section 7);
have your complaints resolved (section 11).

You are obliged to

give correct and complete account and invoicing details;
pay in full and on time when you use a paid plan;
use Soluta for its intended purpose under section 6, and take responsibility for your figures as set out in section 2.

13. Conditions and limits

Hours: the service runs 24 hours a day, 7 days a week, except for maintenance and incidents under section 8.
Scope: Soluta serves accounting books kept under Vietnamese law. You can use it from anywhere with Internet access; the books are stored on servers located in Vietnam.
Customers: businesses, household businesses and organisations in Vietnam, for their business activities. The person who opens the account is at least 18 years old (section 4).
Quantities: within the limits of your plan shown on the Pricing page (companies, users, transactions, legal lookups). To prevent abuse, Soluta may temporarily restrict an account that sends more than 1,000 requests per hour.
Third-party AI assistants: when you use Soluta through Claude, ChatGPT, Grok or another assistant with an MCP connection, use also depends on that provider’s plan, limits and incidents (section 3).
Interruptions: maintenance and incidents as in section 8.

14. How the service is provided

Term: the period you have paid for, 3, 6 or 12 months (section 5). The Basic plan is free of charge.
How to use it: through your AI assistant (Claude, ChatGPT) with the Soluta connector. Connection guide at soluta.vn/en/ket-noi; usage guides at soluta.vn/en/huong-dan.
Devices: a computer or phone with a browser or the Claude / ChatGPT app, and an Internet connection.
Number of devices: no limit on the number of devices. Each user uses their own account; accounts are not shared. The number of users follows your plan (Plus 1, Pro 1, Team 5).
Main features: posting with approval, reading e-invoices, bank statement reconciliation, financial statements, tax returns and legal lookups — by plan, as on the Pricing page. Limits: see section 13.

15. Changes to the Terms and prices

Soluta may change these Terms, its policies or its prices. Soluta gives notice by email and on soluta.vn at least 15 days before the effective date, except for changes required by law, which apply from the time the law sets.
New prices apply only from the next renewal period; the period you have already paid for keeps its price.
If you do not agree: you end the contract before the effective date and receive a refund under section 5(c). Continuing to use Soluta after the effective date means you accept the new version.

16. General terms

Indemnity: you compensate Soluta for damage and reasonable costs (including lawyers’ fees) arising from claims by third parties, data subjects or state authorities, where the cause is: data you entered; your transfer of data through an AI assistant (section 3); your linking of a bank or tax portal account through Cas Link without the right to do so (section 3); wrong invoice details you provided (section 5); or your breach of section 4 or section 6.
Force majeure: neither party is liable for a delay in, or failure to perform, its obligations because of events beyond its reasonable control, such as natural disasters, epidemics, power cuts, failures of networks or infrastructure providers, cyberattacks, or decisions of state authorities. If such an event lasts more than 30 days in a row, Soluta may end the contract and refund the unused part of the fees.
Notices: Soluta sends notices to your confirmed email or shows them in your account. A notice is treated as received when sent; if sent after 17:00 or on a day that is not a working day, it is treated as received on the next working day. You send notices to Soluta at info@soluta.vn or through the Complaints page.
Assignment: Soluta may transfer this contract to an affiliated company or to a party in a merger or acquisition, and will notify you. To transfer the contract to someone else, you need Soluta’s written consent.
Severability: if one term is invalid, the remaining terms are not affected.
Survival: section 7, section 8 (retention after you stop), section 9, section 10, this section and the Privacy Policy continue to apply after the contract ends.
Order of precedence: where documents differ, they apply in this order: a separate contract signed with Soluta (if any), these Terms, the Privacy Policy, the Payment policy, the Pricing page.
Entire agreement: these Terms, the Pricing page, the Payment policy, the Privacy Policy and the Complaints page are the entire agreement between you and Soluta about the service.

17. Contact

info@soluta.vn · (+84) 868 236 369