Terms of Service

1. Definitions

In these Terms of Service ("Terms"), the following definitions apply:

• "Service" means the KnowStack platform accessible at knowstack.ai, including all associated websites, applications, APIs, and services.
• "Company," "we," "us," or "our" means Nest Artem Dolmatov, the operator of KnowStack.
• "User," "you," or "your" means any individual or entity that accesses or uses the Service.
• "Subscriber" means a User who has subscribed to a paid plan or is on a free trial.
• "Company Account" means an organizational workspace within KnowStack under which Users collaborate and data is managed.
• "Your Content" means all data, text, documents, emails, files, and other materials that you upload, connect, or create through the Service.
• "Knowledge Base" or "KB" means the structured collection of information generated from Your Content using the Service.
• "AI Services" means the artificial intelligence features of the Service, including knowledge extraction, content generation, summarization, and semantic search.
• "Subscription" means a recurring paid plan that grants access to specific features and usage limits.
• "AI Usage" means consumption of AI processing resources, measured by tokens processed and billed based on actual usage.

2. Acceptance of Terms

By accessing, registering for, or using KnowStack, you acknowledge that you have read, understood, and agree to be bound by these Terms. If you are using the Service on behalf of an organization, you represent and warrant that you have the authority to bind that organization to these Terms, and references to "you" include that organization.

If you do not agree to these Terms, you must not access or use the Service.

These Terms incorporate by reference our Privacy Policy and Cookie Policy, which describe how we collect, use, and protect your information. By accepting these Terms, you also acknowledge the practices described in those policies.

3. Eligibility

To use the Service, you must meet the following requirements:

• Free tier (Starter plan): You must be at least 16 years of age.
• Paid plans (Professional, Business, Enterprise): You must be at least 18 years of age and have the legal capacity to enter into a binding contract in your jurisdiction.
• If you are using the Service on behalf of an organization, you must be authorized to act on behalf of and bind that organization.

We reserve the right to verify your eligibility and to refuse service to anyone at our sole discretion.

4. Description of Service

KnowStack is an AI-powered knowledge management platform that helps organizations:

• Extract knowledge from various data sources including email (Gmail, IMAP), websites, documents (PDF, DOCX, TXT, CSV), Slack messages, Telegram messages, and meeting transcripts
• Build, organize, and maintain structured Knowledge Bases using AI
• Search Knowledge Bases using AI-powered semantic search
• Generate content using your knowledge as context
• Collaborate on knowledge management within teams with role-based access control
• Export Knowledge Bases in PDF and CSV formats

We reserve the right to modify, suspend, or discontinue any part of the Service at any time. We will make reasonable efforts to provide at least 30 days' notice of material changes that significantly affect your use of the Service.

5. User Accounts

To use most features of KnowStack, you must create an account. When creating and maintaining an account, you agree to:

• Provide accurate, current, and complete information during registration
• Maintain and promptly update your account information to keep it accurate
• Keep your password secure and confidential; we recommend enabling two-factor authentication (TOTP)
• Notify us immediately of any unauthorized access to or use of your account
• Accept responsibility for all activities that occur under your account
• Not share your account credentials or allow others to access your account

You may belong to multiple Company Accounts. Each Company Account has its own data isolation, user roles, permissions, and billing.

We reserve the right to suspend or terminate accounts that violate these Terms, that remain inactive for an extended period, or for any other reason at our reasonable discretion with prior notice.

6. Subscription Plans & Pricing

KnowStack offers the following subscription tiers:

Subscription pricing is displayed on our Pricing page and at the time of checkout. Prices are listed in your local currency where available; billing is processed by Stripe, which handles currency conversion. All prices are exclusive of applicable taxes, which will be added at checkout where required by law.

We may modify our pricing from time to time. Price changes will be communicated with at least 30 days' advance notice and will take effect at the start of your next billing period after the notice period. If you do not agree with a price change, you may cancel your subscription before it takes effect.

7. Free Trials

We may offer free trials of paid plans subject to the following conditions:

• Trial duration is 14 days from activation
• Each Company Account is eligible for one trial only
• During the trial, AI usage is capped at $5.00 USD (or equivalent) of processing costs
• No payment information is required to start a trial
• At the end of the trial period, your Company Account will automatically revert to the Starter (free) plan unless you subscribe to a paid plan before the trial expires
• Any Knowledge Bases and data created during the trial will be retained but may become inaccessible if they exceed Starter plan limits

We reserve the right to modify, limit, or discontinue trials at any time.

8. Billing & Auto-Renewal

Recurring Billing

Paid subscriptions are billed in advance on a recurring basis. You may choose either monthly or annual billing at checkout. Annual billing is offered at a discounted rate.

Auto-Renewal Disclosure

Payment Processing

Payments are processed securely by Stripe, Inc. We do not store your complete credit card details on our servers. Stripe's handling of your payment information is governed by Stripe's Privacy Policy.

Failed Payments

If a payment fails, we will attempt to collect payment according to Stripe's retry schedule. If payment remains unsuccessful:

• Your subscription status will be marked as "past due"
• You will have a 72-hour grace period during which all features remain accessible
• After the grace period, access to paid features will be restricted until payment is resolved
• We will send you email notifications about the failed payment and pending restrictions

9. AI Usage Charges

In addition to your subscription fee, AI Services are billed based on actual usage. AI usage charges work as follows:

• Usage tracking: Each AI operation (knowledge base generation, AI search, email summarization, document extraction, etc.) is tracked individually with its associated cost
• Pricing: AI usage is charged at a rate that includes the underlying AI provider costs plus a service fee. Current rates are visible in your billing dashboard
• Monthly cap: Each plan includes a monthly AI spending cap. When the cap is reached, AI features are temporarily paused until the next billing period or until you choose to pay your outstanding balance early
• Invoicing: AI usage charges are accumulated and added to your next subscription invoice automatically
• Immediate payment: You may choose to pay your accumulated AI usage balance at any time through your billing settings

AI usage during free trials is subject to a $5.00 USD (or equivalent) cap for the duration of the trial.

10. 7-Day Money-Back Guarantee

We offer a 7-day money-back guarantee for your first paid subscription, subject to the following conditions:

• The guarantee applies only to the first paid subscription on your Company Account
• You must request the refund within 7 calendar days of the initial subscription payment date
• The refund covers the subscription fee only; any AI usage charges incurred during the period are non-refundable
• To request a refund, contact us at [email protected] with your account email and the reason for your request
• Refunds will be processed to the original payment method within 5-10 business days
• Upon refund, your Company Account will revert to the Starter (free) plan

This guarantee does not apply to subscription renewals, plan upgrades, plan downgrades, or subsequent subscriptions after a previous cancellation.

11. Cancellation & Refunds

You may cancel your subscription at any time through your billing settings within the Service or by contacting us at [email protected].

Upon cancellation:

• Your subscription will remain active until the end of your current billing period
• You will retain full access to all paid features until the end of the billing period
• At the end of the billing period, your Company Account will revert to the Starter (free) plan
• No refunds will be provided for unused portions of a billing period, except as provided under the 7-Day Money-Back Guarantee (Section 10) or as required by applicable law
• Any outstanding AI usage charges at the time of cancellation will be billed on your final invoice
• Your data will be retained in accordance with our Privacy Policy

You may resubscribe to a paid plan at any time after cancellation.

12. Your Content & Data

Ownership

You retain all ownership rights to Your Content. We do not claim any ownership interest in Your Content.

License Grant

By using the Service, you grant us a limited, non-exclusive, non-transferable license to access, process, and store Your Content solely for the purpose of providing the Service to you. This includes:

• Processing your data through AI providers to generate Knowledge Bases
• Storing your data securely on our infrastructure
• Creating backups for data protection and disaster recovery
• Displaying Your Content to authorized members of your Company Account

This license terminates when you delete Your Content or close your account, subject to our data retention policies as described in our Privacy Policy.

No Training on Your Data

We do not use Your Content to train, improve, or develop any general-purpose AI models, machine learning systems, or products. Your Content is processed exclusively to provide the Service to you.

Your Responsibilities

You are responsible for:

• Ensuring you have the right to upload, connect, or otherwise make available all content through the Service
• The accuracy, legality, and appropriateness of Your Content
• Maintaining your own backups of Your Content
• Complying with any applicable third-party terms when connecting external services (e.g., Gmail, Slack, Telegram terms of service)

13. AI Services & Transparency

KnowStack uses third-party AI models to provide its AI Services. We believe in full transparency about how your data is processed. When you use AI features, your data may be sent to the following providers:

Key commitments regarding AI Services:

• Data sent only at your request: Your Content is only sent to AI providers when you actively initiate an AI-powered feature (e.g., generating a Knowledge Base, running a search query, summarizing emails)
• No model training: We contractually require that AI providers do not use your data to train, improve, or develop their models
• No accuracy guarantee: AI-generated content may contain errors, omissions, or inaccuracies. You are solely responsible for reviewing and verifying any AI-generated content before relying on it
• Provider changes: We may add, remove, or change AI providers from time to time. We will update this list and our Privacy Policy accordingly

14. Data Processing Terms (DPA)

This section constitutes a Data Processing Agreement ("DPA") as required by Article 28 of the EU General Data Protection Regulation ("GDPR") and equivalent data protection laws. To the extent that we process personal data on your behalf, the following terms apply:

14.1 Roles & Scope

• Data Controller: You (the User / Company Account administrator) determine the purposes and means of processing personal data through the Service
• Data Processor: We (KnowStack / Nest Artem Dolmatov) process personal data on your behalf solely as necessary to provide the Service
• Processing scope: We process personal data only on your documented instructions, which consist of these Terms and your use of Service features

14.2 Categories of Data

Categories of personal data that may be processed include:

• Email addresses, names, and contact information contained in connected email accounts
• Message content from Slack, Telegram, and other connected communication platforms
• Document content uploaded to the Service
• Website content crawled at your direction
• Meeting transcripts including participant names and content

14.3 Sub-Processors

We engage the sub-processors listed in Section 13 (AI Services) and our Privacy Policy to provide the Service. You provide general authorization for us to engage sub-processors, subject to the following conditions:

• We will maintain an up-to-date list of sub-processors in our Privacy Policy
• We will notify you of any intended changes to sub-processors by updating our Privacy Policy and, for material changes, by providing email notification at least 14 days in advance
• If you object to a new sub-processor, you may terminate your subscription within 30 days of notification by contacting us
• We impose equivalent data protection obligations on all sub-processors through written contracts

14.4 Security Measures

We implement appropriate technical and organizational measures to ensure a level of security appropriate to the risk, including:

• Encryption at rest: AES-256-GCM for sensitive data including credentials and tokens
• Encryption in transit: TLS 1.2 or higher for all data transmission
• Password security: bcrypt hashing with appropriate work factor
• Access controls: Role-based access control (RBAC) with granular permissions
• Data isolation: Logical tenant isolation between Company Accounts
• Infrastructure: Hosted on SOC 2 compliant cloud infrastructure in the European Union

14.5 Data Breach Notification

In the event of a personal data breach affecting your data:

• We will notify you without undue delay and in any event within 72 hours of becoming aware of the breach, as required by GDPR Article 33
• Notification will include: the nature of the breach, categories and approximate number of data subjects affected, likely consequences, and measures taken or proposed to mitigate the breach
• We will cooperate with you and provide any information reasonably necessary for you to fulfil your own breach notification obligations

14.6 Data Deletion

Upon termination of your subscription or upon your request:

• We will delete or return all personal data processed on your behalf within 30 days, except where retention is required by applicable law
• You may request deletion of your account and associated data at any time through your account settings, subject to a 10-day grace period during which you may cancel the deletion request
• Backups containing your data will be purged according to our standard backup rotation schedule

14.7 Audit Rights

You have the right to verify our compliance with this DPA. Upon reasonable written request (no more than once per calendar year), we will:

• Provide information reasonably necessary to demonstrate compliance with our data processing obligations
• Allow for and contribute to audits conducted by you or an independent third-party auditor mandated by you, subject to reasonable advance notice (at least 30 days), scope limitations to data processing activities, and confidentiality obligations

14.8 International Data Transfers

Our primary infrastructure is located in the European Union. However, certain sub-processors (particularly AI providers) are based in the United States. For transfers of personal data outside the European Economic Area (EEA), we rely on:

• EU Standard Contractual Clauses (SCCs) as adopted by the European Commission
• Adequacy decisions by the European Commission where applicable
• Supplementary measures as necessary to ensure an adequate level of protection

Details of international data transfers are described in our Privacy Policy.

14.9 Assistance

We will assist you, taking into account the nature of processing, in:

• Responding to requests from data subjects exercising their rights under GDPR (access, rectification, erasure, restriction, portability, objection)
• Ensuring compliance with obligations relating to security of processing, data breach notification, data protection impact assessments, and prior consultation with supervisory authorities

15. Intellectual Property

The Service, including its original content (excluding Your Content), features, functionality, user interface, design, and underlying technology, is owned by Nest Artem Dolmatov and protected by copyright, trademark, and other intellectual property laws.

Our trademarks, logos, and service marks may not be used without our prior written consent. Nothing in these Terms grants you any right to use our branding or intellectual property beyond what is necessary to use the Service.

We welcome feedback and suggestions about our Service. By submitting feedback, you grant us a perpetual, irrevocable, royalty-free license to use and incorporate that feedback into our Service without obligation to you.

16. Acceptable Use Policy

You agree not to use the Service to:

• Violate any applicable local, national, or international law or regulation
• Infringe upon the intellectual property, privacy, or other rights of any third party
• Upload, transmit, or connect content that contains malicious code, viruses, or harmful material
• Attempt to gain unauthorized access to the Service, other users' accounts, or our systems and infrastructure
• Interfere with, disrupt, or place an unreasonable burden on the Service or its infrastructure
• Use the Service for spam, phishing, social engineering, or other deceptive practices
• Scrape, crawl, or collect data from the Service by automated means without our prior written consent
• Resell, sublicense, or redistribute the Service or access to it without our authorization
• Use AI Services to generate content that is illegal, harmful, defamatory, obscene, or violates third-party rights
• Circumvent or attempt to circumvent usage limits, AI caps, or other technical restrictions
• Use the Service to develop a competing product or service
• Reverse engineer, decompile, or disassemble any part of the Service

We reserve the right to investigate any suspected violation of this policy and take appropriate action, including removing content, suspending access, or terminating your account, with or without notice.

17. Third-Party Integrations

The Service integrates with various third-party platforms and services. By connecting these services, you acknowledge and agree that:

• You have the authority and right to connect your accounts on those platforms
• Your use of third-party services is subject to their respective terms of service and privacy policies, including but not limited to:
  • Google (Gmail, OAuth) — Google Terms of Service
  • Slack — Slack Terms of Service
  • Telegram — Telegram Terms of Service
• We are not responsible for the availability, accuracy, or content of third-party services
• We are not liable for any damages or losses arising from your use of or reliance on third-party services
• You may disconnect third-party integrations at any time through your account settings; for Google services, you may also revoke access through your Google Account permissions

18. Service Availability

We strive to maintain high availability of the Service but provide it on a "best-effort" basis. We do not guarantee any specific level of uptime or availability.

• The Service may be temporarily unavailable due to scheduled maintenance, updates, or improvements. We will make reasonable efforts to provide advance notice of planned downtime.
• We are not liable for any interruptions caused by circumstances beyond our reasonable control, including but not limited to: acts of God, natural disasters, war, terrorism, pandemics, government actions, power outages, internet connectivity failures, or third-party service outages (force majeure).
• Third-party AI provider outages may temporarily affect AI Services availability. In such cases, other Service features will continue to function normally.

19. Disclaimers

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO:

• IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT
• WARRANTIES THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, SECURE, OR FREE OF HARMFUL COMPONENTS
• WARRANTIES REGARDING THE ACCURACY, COMPLETENESS, OR RELIABILITY OF AI-GENERATED CONTENT
• WARRANTIES THAT THE SERVICE WILL MEET YOUR SPECIFIC REQUIREMENTS OR EXPECTATIONS

AI-generated content is produced by third-party machine learning models and may contain errors, inaccuracies, biases, outdated information, or hallucinations. You are solely responsible for reviewing, verifying, and validating any content generated by the Service before relying on it for any purpose. We strongly recommend that AI-generated content not be used as the sole basis for important business, legal, medical, financial, or safety decisions.

20. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW:

• No indirect damages: Nest Artem Dolmatov, its officers, directors, employees, agents, and affiliates shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to loss of profits, data, use, goodwill, business opportunities, or other intangible losses, regardless of the cause of action or theory of liability.
• Liability cap: Our total aggregate liability for all claims arising out of or relating to these Terms or your use of the Service shall not exceed the greater of: (a) the total amount you have paid us in the twelve (12) months preceding the claim, or (b) one hundred US dollars ($100 USD).
• AI output: We are not liable for any damages, losses, or costs arising from your reliance on AI-generated content, including but not limited to decisions made based on inaccurate, incomplete, or misleading AI output.

These limitations apply even if we have been advised of the possibility of such damages. Some jurisdictions do not allow the limitation or exclusion of certain warranties or liability, so the above limitations may not apply to you to the extent prohibited by applicable law. In such cases, our liability will be limited to the maximum extent permitted by law.

21. Indemnification

You agree to indemnify, defend, and hold harmless Nest Artem Dolmatov and its officers, directors, employees, agents, and affiliates from and against any claims, damages, losses, liabilities, costs, and expenses (including reasonable attorneys' fees) arising from or related to:

• Your use of the Service
• Your violation of these Terms
• Your violation of any applicable law or regulation
• Your violation of any third-party rights, including intellectual property and privacy rights
• Your Content or any data you upload, connect, or process through the Service
• Your negligent or wrongful conduct in connection with the Service

We will promptly notify you of any such claim and will provide reasonable cooperation in the defense. You may not settle any claim without our prior written consent if the settlement would impose obligations on us beyond the payment of money.

22. International Provisions

The Service is available to users worldwide. Depending on your jurisdiction, the following additional provisions may apply:

European Union / European Economic Area

• The data processing terms in Section 14 (DPA) apply to all processing of personal data of individuals in the EU/EEA
• You have the right to lodge a complaint with your local data protection supervisory authority
• Nothing in these Terms affects your rights as a consumer under mandatory EU consumer protection laws, including the Consumer Rights Directive (2011/83/EU)

United States

• If you are a California resident, the California Consumer Privacy Act (CCPA) may provide you with additional rights. See Section 16 of our Privacy Policy for details.
• California Auto-Renewal Law (ARL) disclosure: Your subscription will automatically renew and you will be charged at the then-current rate unless you cancel. You may cancel at any time through your billing settings or by contacting [email protected]. See Section 8 for complete auto-renewal terms.
• You agree that the Federal Arbitration Act, applicable federal law, and the laws of England and Wales (as set forth in Section 23) govern these Terms.

Canada

• We comply with the Personal Information Protection and Electronic Documents Act (PIPEDA) and substantially similar provincial legislation in our handling of Canadian residents' personal information
• You have the right to access and request correction of your personal information held by us
• Complaints regarding our handling of personal information may be directed to the Office of the Privacy Commissioner of Canada

Other Jurisdictions

If your use of the Service is subject to laws that provide mandatory consumer protections or other rights that cannot be waived by agreement, nothing in these Terms is intended to limit or exclude such protections. To the extent any provision of these Terms conflicts with mandatory local law, that provision shall be modified to the minimum extent necessary to comply with such law.

23. Governing Law & Dispute Resolution

Governing Law

These Terms and any dispute arising out of or in connection with them (including any non-contractual disputes or claims) shall be governed by and construed in accordance with the laws of England and Wales.

Good-Faith Negotiation

Before initiating any formal dispute resolution proceedings, you agree to first attempt to resolve any dispute by contacting us at [email protected]. We will attempt to resolve the dispute through good-faith negotiation within 30 days of receiving your written notice.

Arbitration

If the dispute is not resolved through negotiation, either party may refer the dispute to be finally resolved by arbitration under the Rules of the London Court of International Arbitration (LCIA), which rules are deemed to be incorporated by reference into this clause. The arbitration shall be conducted as follows:

• Seat of arbitration: London, England
• Language: English
• Number of arbitrators: One (1), to be appointed in accordance with the LCIA Rules
• Confidentiality: The existence, content, and outcome of the arbitration shall be kept confidential by both parties

Exceptions

• Small claims: Either party may bring an individual action in a small claims court of competent jurisdiction as an alternative to arbitration
• Injunctive relief: Nothing in this section prevents either party from seeking interim or injunctive relief from a court of competent jurisdiction to prevent imminent harm or preserve the status quo pending arbitration
• Consumer rights: If you are a consumer in a jurisdiction where mandatory consumer protection laws require disputes to be resolved in your local courts, those mandatory provisions shall prevail to the extent they are applicable

24. Changes to Terms

We reserve the right to modify, amend, or update these Terms at any time at our sole discretion. Changes take effect upon the date specified in the updated Terms.

When we make changes:

• We will update the "Last updated" date at the top of this page
• We will notify you of any changes by sending a notification to the email address associated with your account
• The updated Terms will be posted on this page and become effective on the date stated in the notification or, if no date is stated, upon posting

By continuing to access or use the Service after updated Terms become effective, you agree to be bound by the revised Terms. All existing users are deemed to have accepted the updated Terms upon their effective date. If you do not agree with the revised Terms, your sole remedy is to stop using the Service and cancel your subscription before the effective date.

25. Contact Us

If you have questions about these Terms of Service, please contact us:

For billing-related inquiries, please include your account email and Company Account name.

For data protection inquiries or to exercise your privacy rights, please include "Privacy Request" in your email subject line.