Terms of Service

1. Agreement

These Terms of Service (the “Terms”) form a binding agreement between you and Royal Technology Limited, a company registered in Bulgaria (company number 203253637, VAT number BG203253637), with registered office at Mladost 122, Varna 9020, Bulgaria (“Flowzart”, “we”, “our”, or “us”), governing your access to and use of the Flowzart platform, websites, applications, APIs, and related services (the “Service”).

By creating an account, clicking “I agree” (or any equivalent), or using the Service, you confirm that you have read, understood, and agreed to these Terms. If you do not agree, do not use the Service.

If you are using the Service on behalf of an organisation, you represent that you have the authority to bind that organisation, and references to “you” in these Terms include that organisation.

2. Definitions

The following capitalised terms have the meanings set out below:

• “Account”: the account you create to access the Service, including any workspaces, organisations, or environments under it.
• “Customer Content”: any data, workflows, configuration, secrets, credentials, files, or other materials you submit to or generate within the Service.
• “Documentation”: the technical and product documentation we publish for the Service, as updated from time to time.
• “Energy Units”: the unit in which compute consumption is measured on the Service, expressed in watt-hours (“Wh”) and kilowatt-hours (“kWh”; 1 kWh = 1,000 Wh).
• “Fees”: the amounts payable for your use of the Service, as set out on our pricing page or in an order document.
• “PAYG Bundle”: a quantity of Energy Units purchased upfront on a pay-as-you-go basis, as further described in section 5.2.
• “Sub-processor”: a third party we engage to process Personal Data on our behalf in connection with the Service, as further described in our Data Processing Addendum.
• “Subscription”: a recurring plan that grants a monthly allowance of Energy Units (the “Subscription Allowance”) plus any plan-specific features, as further described in section 5.3.
• “Beta Service”: any feature or service we make available to you that is labelled “alpha”, “beta”, “preview”, “experimental”, or similar.

3. Eligibility & accounts

You must be at least 16 years old and have the legal capacity to enter into a binding contract to use the Service. The Service is not directed at children under 16, and we do not knowingly permit them to register an Account.

You are responsible for the accuracy of the registration information you provide and for keeping your credentials confidential. You are responsible for all activity that occurs under your Account, whether or not you authorised it. We strongly recommend enabling two-factor authentication.

If you suspect your Account has been compromised, you must notify us promptly at [email protected] so we can help secure it.

4. The service

Subject to these Terms and your timely payment of any applicable Fees, we grant you a limited, non-exclusive, non-transferable, non-sublicensable right to access and use the Service for your internal business purposes during the term of your Account.

We retain all right, title, and interest in and to the Service, including all intellectual property rights in our software, models, content, and trademarks. Nothing in these Terms transfers ownership of the Service to you.

We may evolve the Service over time, including by adding, modifying, or discontinuing features. Where a change materially reduces functionality you depend on, we will use reasonable efforts to give advance notice via the Service or by email.

Feedback. If you provide suggestions, ideas, or feedback about the Service (“Feedback”), you grant us a perpetual, irrevocable, royalty-free, worldwide licence to use that Feedback for any purpose, including incorporating it into the Service. Feedback is not Confidential Information unless we agree otherwise in writing.

5. Fees, energy units & billing

Pricing in Wh / kWh

Use of the Service is priced in Energy Units: watt-hours and kilowatt-hours of Flowzart-side resources consumed by your workflows. Different node types and operations consume different quantities of Energy Units; see our pricing page and the Documentation for current rates and indicative consumption per node type.

What Energy Units cover. Energy Units meter Flowzart-side resources used by your workflows, namely:

• compute: each node has a published Wh-per-second rating that determines the energy it draws while executing;
• memory: RAM allocated to your runs;
• network: data transferred into and out of your workflows; and
• storage: persistent state, run history, and other data you keep on the Service.

What Energy Units do not cover. Energy Units do not include amounts charged by third parties for services you choose to call from your workflows: for example, large-language-model API tokens, webhook destinations, third-party SaaS APIs, or other Third-Party Services (see section 9). Those costs are billed by the third party against credentials and API keys you supply (a bring-your-own-API model), and are governed by your agreement with that third party.

We may change Energy Unit rates and per-node costs from time to time. Changes apply only to Energy Units consumed after the change takes effect; pre-purchased PAYG Bundles and already-renewed Subscription cycles are not retroactively repriced.

PAYG bundles

PAYG Bundles are blocks of Energy Units you buy upfront, on a one-off basis. PAYG Bundles:

• are charged at the point of purchase and are non-refundable in cash once delivered to your Account, except where required by law;
• are valid for two (2) years from the date of purchase, after which any unused Energy Units in that bundle expire;
• do not auto-renew;
• do not require an active Subscription to be redeemed; and
• are tied to the Account that purchased them and may not be transferred between Accounts.

Energy Units in PAYG Bundles are consumed on a first-in-first-out basis across bundles you hold, so older bundles draw down before newer ones. We make a record of each bundle, its purchase date, expiry date, and remaining balance available in your Account billing area.

Subscriptions

A Subscription grants you a recurring, plan-specific monthly Subscription Allowance of Energy Units, plus any plan features described on the pricing page. Subscriptions:

• are billed in advance on a monthly basis (or annually, if you choose an annual cycle);
• provide a Subscription Allowance that resets at the start of each billing cycle;
• do not roll over: any Energy Units in your Subscription Allowance that you have not used by the end of a billing cycle are forfeit at the start of the next cycle and are not refundable, exchangeable, or convertible into PAYG Energy Units;
• renew automatically at the end of each billing cycle until you cancel them through your Account; and
• may include plan-specific limits on workflow size, concurrency, retention, or other features in addition to the Energy Unit allowance.

How energy is consumed

When you run a workflow that consumes Energy Units, we draw from your balances in this order:

1. your Subscription Allowance for the current cycle (if you have an active Subscription); then
2. your PAYG Bundle balance, with the bundle closest to its expiry date drawn down first.

If both balances are exhausted, the Service may pause execution of further runs until you top up a PAYG Bundle, upgrade your Subscription, or wait for the next Subscription cycle.

Auto-renewal & changes

Subscriptions auto-renew for successive billing cycles at the then-current Fees until you cancel. You can cancel at any time from your Account; cancellation takes effect at the end of the current billing cycle, and you keep access until then.

To avoid renewal and the corresponding charge for the next cycle, you must cancel at least 24 hours before the last day of the current cycle. Cancellations submitted within the last 24 hours of a cycle may not be processed before the auto-renewal charge is taken; in that case, the cancellation takes effect at the end of the cycle that has just begun, and that cycle's Fee remains payable.

If we change Fees for a Subscription plan, we will give you reasonable notice (typically at least 30 days) before the change takes effect on your renewal. You can decline by downgrading or cancelling before the next renewal date.

Taxes

Fees are exclusive of any taxes, levies, or duties imposed by taxing authorities (other than taxes based on our income). You are responsible for the payment of any such taxes associated with your purchases, except where we are required by law to collect them on your behalf.

Failed payment

If a Subscription payment fails, we will retry collection and notify you. If payment is not resolved within a reasonable grace period, we may suspend or downgrade the paid features of your Account. Your PAYG Bundle balance is not affected by a failed Subscription payment; see section 10.3.

6. Refunds & credits

Except where required by applicable law, all Fees are non-refundable.

• PAYG Bundles are not refundable in cash once delivered to your Account. Unused Energy Units in a PAYG Bundle remain available for use until the bundle's expiry date, even after a Subscription cancellation, payment failure, or downgrade.
• Subscriptions are not refundable for partially-used cycles, unused Subscription Allowance at cycle reset, or for Subscription periods you choose not to use. If we terminate your Subscription without cause mid-cycle, we will refund a pro-rata portion of the Subscription Fee for the unused remainder of the cycle.
• Where applicable consumer-protection law (for example in the European Union or the United Kingdom) grants you a statutory right of withdrawal or other refund right, those rights apply notwithstanding this section.

7. Acceptable use

You agree not to, and not to permit any third party to:

• use the Service in violation of any applicable law or regulation;
• reverse-engineer, decompile, disassemble, or otherwise attempt to derive the source code of the Service, except to the extent that such activity cannot be prohibited by law;
• use the Service, or any output of the Service, to develop, train, fine-tune, or improve any foundation model, large-scale machine-learning model, or competing service;
• interfere with or disrupt the integrity or performance of the Service, including by generating excessive load, probing for vulnerabilities outside of an authorised disclosure channel, or attempting to bypass usage limits;
• use the Service in connection with high-risk activities where failure of the Service could lead to death, personal injury, or severe environmental or property damage (including, without limitation, the operation of nuclear facilities, life-support systems, aircraft navigation, or weapons systems);
• use the Service to attack, disrupt, exfiltrate from, or otherwise compromise critical infrastructure, including power, water, transport, telecommunications, financial, healthcare, or electoral systems and the databases that support them;
• use the Service to generate, store, transmit, or distribute child sexual abuse material (CSAM), including computer-generated CSAM. We will report any such material we become aware of to the appropriate authorities and co-operate with their investigations to the extent permitted by law;
• submit through the Service any data subject to specific regulatory protection that we do not advertise as supported (for example, payment card data falling within PCI-DSS, protected health information falling within HIPAA, or special categories of personal data under the GDPR), unless we have agreed in writing to such use;
• share, resell, sublicense, or otherwise grant access to the Service to any third party outside your organisation, or use the Service to provide a managed or hosted offering to third parties; or
• impersonate any person, misrepresent your affiliation, or use the Service to harass, defame, or send unsolicited communications.

We may update this acceptable use policy from time to time to address abuse patterns or new regulatory requirements. Continued use of the Service after a published update constitutes acceptance of the updated policy.

8. Customer content & data

As between you and us, you retain all right, title, and interest in and to your Customer Content. You grant us a worldwide, royalty-free, non-exclusive, non-sublicensable (except to our sub-processors) licence to host, copy, transmit, display, and process Customer Content solely as necessary to operate, maintain, secure, and provide the Service to you.

We do not use Customer Content to train Flowzart's or any third party's generalised AI or machine-learning models, except where you have given us specific, opt-in consent to do so.

You are solely responsible for the legality of your Customer Content, your authority to submit it to the Service, and the accuracy and quality of the workflows you build with it. Our processing of any Personal Data within Customer Content is governed by our Data Processing Addendum, which is incorporated into these Terms.

9. Third-party integrations

The Service may interoperate with third-party products, APIs, and services (“Third-Party Services”) that you choose to connect. Third-Party Services are not part of the Service. Their availability, functionality, and use are governed by your agreement with the relevant third party, and we are not responsible for their behaviour, uptime, accuracy, or how they handle your data once you direct us to send data to them.

By connecting a Third-Party Service to your Account, you authorise us to transmit data between the Service and that Third-Party Service as your workflows require. You are responsible for the credentials and permissions you grant to those services.

10. Suspension & termination

By you

You may cancel your Subscription or close your Account at any time through your Account settings. Cancellation of a Subscription takes effect at the end of the current billing cycle; closure of an Account is effective on submission, subject to our retention of data needed to comply with our legal obligations.

By us

We may suspend or terminate your Account, in whole or in part, with notice (or, where the breach is severe or where required by law, without notice) if:

• you are in material breach of these Terms or of our acceptable use policy;
• your use of the Service exposes us, the Service, or other users to legal, security, or operational risk;
• you fail to pay any Fees when due, after a reasonable opportunity to cure;
• we are compelled by law, regulation, or court order to do so; or
• we discontinue the Service generally, in which case we will give reasonable advance notice and, where applicable, a pro-rata refund of any pre-paid Subscription Fees for the unused portion of the cycle.

PAYG balance preserved

If you re-subscribe within your PAYG Bundle's one-year validity window, your PAYG balance was always available and is unaffected by the gap in Subscription coverage.

We will not delete your Account, your PAYG Bundle balance, or the records associated with them solely because your Subscription has ended. Where we suspend or terminate your Account for cause under section 10.2, we may suspend access to your PAYG Bundles for the duration of the suspension. Where we terminate your Account for material breach of section 7 (Acceptable Use), we may forfeit your PAYG Bundle balance to the extent permitted by applicable law; in all other termination scenarios, your PAYG Bundle balance survives termination until its one-year expiry.

Account deletion & export

On termination of your Account, you may request an export of your Customer Content within thirty (30) days of termination, in a format we reasonably determine. After that period, we will delete or anonymise your Customer Content, except where retention is required for legal, regulatory, audit, fraud-prevention, or dispute-resolution reasons. Billing records (including PAYG Bundle ledgers and Subscription cycle records) are retained for the periods set out in our Privacy Policy and DPA.

11. Disclaimers

Except as expressly stated in these Terms, the Service is provided “as is” and “as available”, without warranties of any kind, whether express, implied, or statutory, including warranties of merchantability, fitness for a particular purpose, title, non-infringement, or that the Service will be uninterrupted, error-free, secure, or free of harmful components.

Nothing in these Terms is intended to exclude or limit any warranty or right that cannot be excluded or limited under applicable law, including non-excludable consumer rights.

12. Limitation of liability

To the maximum extent permitted by applicable law:

• neither party will be liable to the other for any indirect, incidental, consequential, special, exemplary, or punitive damages, or for lost profits, lost revenue, lost goodwill, lost data, or business interruption, even if it has been advised of the possibility of such damages and even if a remedy fails of its essential purpose; and
• each party's aggregate liability under or in connection with these Terms will not exceed the total Fees paid or payable by you to us in the twelve (12) months immediately preceding the event giving rise to the liability.

These limitations do not apply to: (a) your obligation to pay Fees due; (b) either party's liability for fraud or fraudulent misrepresentation; (c) liability for death or personal injury caused by negligence; or (d) any other liability that cannot be limited or excluded under applicable law.

13. Indemnity

By you. You will defend, indemnify, and hold us and our affiliates, officers, employees, and agents harmless from and against any third-party claims, losses, damages, costs, and expenses (including reasonable legal fees) arising out of or relating to: (a) your Customer Content; (b) your breach of these Terms or the acceptable use policy; or (c) your violation of applicable law in connection with your use of the Service.

By us. If a third party brings a claim against you alleging that your use of the Service in accordance with these Terms infringes that third party's intellectual property rights, we will defend the claim and pay damages or settlement amounts finally awarded against you, provided you (i) promptly notify us of the claim, (ii) give us sole control of the defence and settlement, and (iii) reasonably co-operate with us. This indemnity does not apply to claims arising from your Customer Content, from your use of the Service in combination with non-Flowzart software or services, or from your modification of the Service.

14. Confidentiality

Each party may receive non-public information from the other that is identified as confidential or that a reasonable person would understand to be confidential (“Confidential Information”). Each party will protect the other's Confidential Information using at least the same standard of care it uses to protect its own (but no less than reasonable care), use it only to perform under these Terms, and disclose it only to its personnel and advisors who need to know and are bound by equivalent obligations of confidentiality.

Confidential Information does not include information that is publicly available, was already known to the receiving party without a confidentiality obligation, is independently developed, or is rightfully received from a third party. A party may disclose Confidential Information when compelled by law, provided it gives the other party reasonable prior notice (where lawful) and co-operates with reasonable efforts to limit the disclosure.

15. Beta releases

Beta Services are provided on an as-is basis, may be unstable, may be discontinued at any time, and are excluded from any service-level commitments and from the indemnity in section 13. We may impose additional or different terms on Beta Services, which will be presented to you when you opt in.

16. Changes to these Terms

We may update these Terms from time to time. Where a change is material, we will give you reasonable advance notice (typically at least 30 days) by email or through the Service before the change takes effect. Your continued use of the Service after the effective date of an updated version constitutes acceptance of the updated Terms. If you do not accept the updated Terms, you must stop using the Service before the effective date.

If you do not accept the updated Terms and the change is material to you, you may cancel your Subscription before the effective date and receive a pro-rata refund of the unused portion of the current Subscription cycle. Any PAYG Bundles you hold remain available until their one-year expiry as set out in section 10.3.

17. Governing law & disputes

These Terms, and any dispute or claim (including non-contractual disputes or claims) arising out of or in connection with them or their subject matter or formation, are governed by the laws of Bulgaria, without regard to its conflict-of-laws principles.

Each party irrevocably submits to the exclusive jurisdiction of the courts of Varna, Bulgaria for the resolution of any disputes arising out of or in connection with these Terms, save that nothing in this section limits any non-waivable right that a consumer may have under the laws of their country of residence to bring proceedings in their local courts.

18. Notices

We may give you notices through the Service, by email to the address associated with your Account, or by post to the address you provide. You may give us notice by email to [email protected] or by post to Mladost 122, Varna 9020, Bulgaria, marked for the attention of the Legal team.

19. General

Entire agreement. These Terms, together with the documents they expressly incorporate (including the Privacy Policy, the DPA, and the Security Policy), constitute the entire agreement between you and us in respect of the Service, and supersede any prior agreements or understandings on the subject matter.

Assignment. You may not assign or transfer these Terms without our prior written consent. We may assign these Terms to an affiliate or to a successor in connection with a reorganisation, merger, acquisition, or sale of all or substantially all of our business or assets, on notice to you.

Severability. If any provision of these Terms is held to be invalid or unenforceable, the remaining provisions remain in full force, and the invalid provision will be reformed to the minimum extent necessary to make it enforceable while preserving its intent.

Waiver. Our failure to enforce any provision of these Terms is not a waiver of our right to enforce it later.

Force majeure. Neither party is liable for any delay or failure to perform caused by circumstances beyond its reasonable control, including acts of God, war, terrorism, civil unrest, governmental action, labour disputes, internet or utility failures, or pandemics, except for obligations to pay Fees.

Independent contractors. The parties are independent contractors. Nothing in these Terms creates any agency, partnership, joint venture, or employment relationship.

No third-party beneficiaries. These Terms do not confer any rights on any person or party other than the parties to them.

Effective: 2026-05-06 · v1.0