Syllabik — AI Voice Synthesis

Non-binding translation. This English version is provided for your convenience only. The legally binding version is the German original. In the event of any discrepancy, the German version prevails.

Last updated: June 2026

Part A — General Terms and Conditions (GTC)

1. Provider, Scope, Subject Matter

1.1 The provider and operator of the service available at https://syllabik.me ("Syllabik", "Service", "we", "us") is:

Tiamat UG (haftungsbeschränkt)
An der Strusbek 12, 22926 Ahrensburg, Germany
Commercial register: HRB 25322 HL, Local Court of Lübeck
Represented by: A.J. Holtmann
Email: mail@tiamat-labs.com

1.2 These Terms apply to your registration for and use of Syllabik ("User", "you"). They apply in the version valid at the time the contract is concluded or the respective use takes place.

1.3 Syllabik is web-based software that enables users to generate speech output ("Voice", "Output") from text input using artificial intelligence, to listen to it, download it and — depending on the plan — use it commercially.

1.4 The rights to the generated voices and audio files (rights of use and exploitation) are governed by a separate License Agreement. In the event of conflicts between these Terms and the License Agreement, the provisions of the License Agreement prevail with respect to the rights in the Output.

1.5 Deviating, conflicting or supplementary terms of the User do not become part of the contract unless we expressly consent to their validity in text form.

1.6 A consumer is any natural person who concludes the contract for purposes that are predominantly outside their trade, business or profession (Section 13 of the German Civil Code, BGB). An entrepreneur is anyone who concludes the contract in the exercise of their trade, business or profession (Section 14 BGB).

2. Registration, Account, Minimum Age

2.1 Use of the paid features requires a user account. When registering, you must provide truthful and complete information. A valid email address must be provided; we may verify it.

2.2 The User must keep their access credentials confidential and not disclose them to third parties. The User is responsible for all activity carried out via their account. Any suspicion of misuse or unauthorized access must be reported to us without undue delay.

2.3 It is prohibited to impersonate another person or to share, transfer or sell accounts, resources or access credentials to third parties, unless expressly provided for in the respective plan (e.g. team seats).

2.4 The Service is intended for persons who have reached the age of 16 and have full legal capacity. Minors under the age of 16 may not use the Service. If you are between 16 and 18 years old, you require the consent of your legal guardians for a paid contract.

3. Scope of Services, Credits, Plans, Availability

3.1 The specific scope of functions and services results from the respective plan/price description on the pricing page in the version valid at the time of booking. We currently offer a free entry tier as well as paid subscription plans. The number of plans, their designation, prices, features and included allowances (e.g. "Instant Credits", "Batch Credits", audio download, API access, commercial use) may change from time to time and depending on the region. The description on the pricing page is authoritative.

3.2 Voices & audio files are generated in exchange for the consumption of Credits. Different types of Credits may exist (e.g. "Instant" for immediate and "Batch" for bundled generation). Monthly allowances are provided at the beginning of the respective billing period; unused Credits expire at the end of the period unless otherwise specified on the pricing page.

3.3 We endeavour to keep the Service available as uninterruptedly as possible, but outside of expressly agreed service levels (e.g. an SLA in the Pro plan) we do not owe any specific availability. Maintenance, updates, disruptions at upstream providers or force majeure may lead to temporary restrictions.

3.4 The Service (including the AI models and features used) may be continuously developed further. Features available at one point in time need not remain available in identical form later, provided this is done for objective reasons (e.g. product development, legal or security reasons, third-party requirements) and the essential contractual scope of services is preserved.

3.5 It is prohibited to access the Service with automated systems (bots, crawlers, scrapers) in a manner that goes beyond use with a standard web browser, or to place an excessive load on the infrastructure.

4. Input, Output and User Responsibility

4.1 "Input" means all content that the User transmits to the Service, in particular text prompts, parameters (e.g. voices, texts, mood), entered or generated texts and — where the feature provides for this — uploaded audio files.

4.2 The User is solely responsible for ensuring that their Input and its use in the Service do not infringe any third-party rights (in particular copyright, trademark, personality or data protection rights) and do not violate any statutory provisions. The User warrants that they hold all necessary rights and consents for the content they transmit.

4.3 In particular, it is prohibited to use the Service to generate, store or distribute content that (a) is unlawful, defamatory, harmful to minors, glorifies violence, is pornographic, discriminatory or capable of inciting hatred; (b) infringes third-party rights, including the attempt to imitate the voice, name, likeness or distinctive style of a real person without permission, or to create the impression of authorship/affiliation that does not exist; (c) contains malware or impairs the security/integrity of the Service; (d) uses the Service to develop competing products or to train third-party AI/machine-learning models.

4.4 We are entitled — but not obliged — to use technical measures (e.g. content filters, detection of potentially infringing uploads) and to block Input/Output that violates these Terms or applicable law.

4.5 Responsibility for the use and distribution of the generated Output and any uploaded own content lies with the User. The scope of the rights of use granted in the Output is governed by the License Agreement.

5. AI Transparency; Notes on How It Works

5.1 The voices and speech are generated wholly or partly automatically by AI systems. The Output may be flawed and does not necessarily meet the User's expectations.

5.2 Due to the way generative AI works, the Output may not be unique; other users may receive identical or similar Output for identical or similar Input. An identical Input by another user is not your Input, and Output generated for others is not your Output.

5.3 AI labelling obligation (Art. 50 AI Act / Regulation (EU) 2024/1689). We point out that audio content generated by Syllabik constitutes artificially generated content within the meaning of Regulation (EU) 2024/1689. The obligation to machine-readably label synthetic content (Art. 50(2) AI Act) takes effect from 02 August 2026 (for systems already on the market before this date, according to current understanding, presumably from 02 December 2026). Insofar as we are obliged to do so, we will label the Output accordingly; the User is obliged not to remove or manipulate any labels, watermarks or metadata.

6. Third-Party Services and Third-Party Content

6.1 The Service may integrate third-party technologies, models or services (e.g. AI models for speech or text generation). Where a feature is based on a third-party service, your Input may be transmitted to that third-party service for processing; in that respect, its terms and our privacy policy apply in addition.

6.2 To the extent legally permissible, we assume no liability for the content, availability, accuracy or lawfulness of third-party services. We may modify, restrict or discontinue third-party integrations for objective reasons (legal, technical, security- or risk-related).

7. Prices, Payment, VAT

7.1 The prices stated on the pricing page at the time of the order apply. The prices stated are final prices including statutory VAT.

7.2 Payment is made via the payment service providers offered in the ordering process, Stripe and PayPal. When using a payment service provider, its terms apply in addition.

7.3 For subscriptions, the term begins upon conclusion of the contract. The fee is due in advance for the respective booked billing period (monthly or annually).

8. Term, Automatic Renewal, Termination

8.1 Subscriptions are concluded for the term specified at booking and renew automatically for the same period unless terminated in due time.

8.2 Consumers may terminate subscriptions that renew automatically at any time after the end of the initial term with one month's notice (cf. Section 309 No. 9 BGB). Termination is possible at least as easily as conclusion; for consumer continuing obligations concluded via the website we provide a cancellation button (Section 312k BGB).

8.3 The right to extraordinary termination for good cause remains unaffected for both parties. Good cause for us exists in particular in the case of significant or repeated breaches of these Terms or the License Agreement.

8.4 Upon termination, access to features and stored content that goes beyond the then-applicable (e.g. free) plan may end. Before deletion, we will give you a reasonable opportunity to download your content. Rights of use in the Output already acquired during the subscription period are governed by the License Agreement.

9. Right of Withdrawal for Consumers

Withdrawal instructions

Because Syllabik delivers audio files immediately (digital content/digital service), by concluding a contract you agree that your right of withdrawal lapses.

Right of withdrawal. You have the right to withdraw from this contract within fourteen days without giving any reason. The withdrawal period is fourteen days from the day of conclusion of the contract.

To exercise your right of withdrawal, you must inform us —

Tiamat UG (haftungsbeschränkt), An der Strusbek 12, 22926 Ahrensburg, Germany, Email: mail@tiamat-labs.com

— by means of a clear declaration (e.g. a letter sent by post or an email) of your decision to withdraw from this contract. You may use the attached model withdrawal form, although this is not mandatory. To meet the withdrawal deadline, it is sufficient that you send the notification of the exercise of the right of withdrawal before the withdrawal period has expired.

Consequences of withdrawal. If you withdraw from this contract, we shall reimburse to you all payments received from you without undue delay and no later than fourteen days from the day on which we receive notification of your withdrawal. For this repayment we will use the same means of payment that you used for the original transaction, unless expressly agreed otherwise with you; in no event will you be charged any fees for this repayment.

9.1 Early expiry of the right of withdrawal for digital content/services. The right of withdrawal lapses in the case of a contract for the supply of digital content not on a tangible medium, or for digital services, if we have begun performance of the contract after you (a) expressly consented to us beginning performance before the end of the withdrawal period, and (b) confirmed your awareness that by giving your consent you lose your right of withdrawal upon commencement of performance, and we have provided you with confirmation of this on a durable medium.

9.2 Model withdrawal form

If you wish to withdraw from the contract, please complete this form and return it.

To: Tiamat UG (haftungsbeschränkt), An der Strusbek 12, 22926 Ahrensburg, Germany, Email: mail@tiamat-labs.com

I/we (*) hereby withdraw from the contract concluded by me/us (*) for the provision of the following service: ____________

Ordered on (*)/received on (*): ____________

Name of consumer(s): ____________

Address of consumer(s): ____________

Signature of consumer(s) (only for notification on paper): ____________

Date: ____________

(*) Delete as appropriate.

10. Warranty and Liability

10.1 The statutory rights in respect of defects apply. For paid consumer contracts concerning digital products, Sections 327 et seq. BGB apply in addition.

10.2 The Service and the Output are provided within the scope of what is technically possible according to the state of the art. We do not warrant any particular suitability of the Output for a specific commercial or other purpose, its legal validity vis-à-vis third parties, or its freedom from third-party rights; the risk of public use, synchronization, monetization or distribution of the Output lies with the User (see also the License Agreement).

10.3 We are liable without limitation (a) in cases of intent and gross negligence, (b) for damage arising from injury to life, body or health, (c) under the Product Liability Act, and (d) to the extent of a guarantee assumed by us.

10.4 In the case of slightly negligent breach of a material contractual obligation (an obligation whose fulfilment makes the proper performance of the contract possible in the first place and on whose observance the User regularly relies — a "cardinal obligation"), our liability is limited to the foreseeable damage typical for this type of contract.

10.5 Otherwise, liability — on whatever legal grounds — is excluded. The above limitations also apply in favour of our legal representatives, employees and vicarious agents.

11. Indemnification (vis-à-vis entrepreneurs)

Insofar as the User is an entrepreneur, they shall indemnify us upon first request against all third-party claims asserted against us due to an infringement of their rights by Input transmitted by the User or by the use of the Output caused by the User, including reasonable costs of legal defence. Statutory provisions apply vis-à-vis consumers.

12. Data Protection

We process personal data in accordance with our privacy policy.

13. Changes to These Terms

13.1 We may amend these Terms if this becomes necessary for a valid reason (e.g. a change in the legal situation, supreme court case law, a change in the range of services, technical development) and the User is not unreasonably disadvantaged thereby.

13.2 We will notify changes at least six weeks before they take effect in text form (e.g. by email), indicating the amended terms, the date they take effect, the right to object and the consequences. If the User does not object within six weeks, the changes are deemed accepted. If the User objects, either party may terminate the contract as of the time the change takes effect.

14. Final Provisions

14.1 Applicable law. The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods. For consumers with habitual residence in the EU/EEA, the mandatory consumer protection provisions of their state of residence remain unaffected.

14.2 Place of jurisdiction. If the User is a merchant, a legal entity under public law or a special fund under public law, the exclusive place of jurisdiction for all disputes arising from this contractual relationship is our registered office. For consumers, the statutory places of jurisdiction apply.

14.3 Severability clause. Should any provision of these Terms be or become invalid, the validity of the remaining provisions remains unaffected.

14.4 Consumer dispute resolution. We are neither willing nor obliged to participate in dispute resolution proceedings before a consumer arbitration body.

14.5 Assignment. The User may only transfer rights and obligations under this contract with our prior consent in text form. We may transfer the contract to a third party within the framework of statutory requirements; in this case, consumers have a right of termination.

Part B — License and Rights-of-Use Agreement

1. Applicability and Relationship to the GTC

1.1 This License and Rights-of-Use Agreement ("License Agreement") governs which rights the User obtains in the audio files ("Output", "Speech & Voice") generated with Syllabik. It applies in addition to the General Terms and Conditions (GTC) of Tiamat UG (haftungsbeschränkt).

1.2 By registering for or using the Service, the User accepts this License Agreement. In the event of conflicts between the GTC and the License Agreement, the provisions of this License Agreement prevail with respect to the rights in the Output.

2. Definitions

2.1 Input – text prompts, parameters (e.g. voice, mood, language), entered or generated texts transmitted by the User, and — where provided for — uploaded own audio files ("Own Content").

2.2 Output / Speech – the audio files generated by the AI system from the Input (including derived versions such as edits and format variants).

3. Rights in Own Content

3.1 The User retains all rights in Own Content. The User warrants that they hold all necessary rights therein.

3.2 The User grants us a non-exclusive right, limited in territory and time to the term of the contract, to store, process and technically reproduce Own Content solely for the purpose necessary to provide the Service to the User (e.g. to generate Output from it).

4. Rights in the Output – "Your files belong to you"

4.1 Principle. Subject to full payment of the respective plan and compliance with the GTC and the License Agreement, we grant the User the most extensive, exclusive, worldwide right of use and exploitation in the Output, unlimited in time, territory and content, transferable and sublicensable, to the extent that such rights are available to us and to the extent that any protective rights exist in the Output at all (see § 4.4). We waive the assertion of our own rights in the Output vis-à-vis the User to the extent of this grant.

4.2 Commercial use. Commercial use of the Output is permitted in accordance with the respective booked plan (see pricing page). To the extent a plan includes commercial use, the User may in particular publish, reproduce, edit, incorporate into their own or third-party audiovisual projects, monetize and — subject to § 5 — distribute the Output on third-party platforms (e.g. social media, streaming).

4.3 "Lifetime" rights. Insofar as a plan provides for a "lifetime license" on generated audio files, this means: the rights granted under this License Agreement in audio files created during an active paid subscription remain with the User permanently — even after termination of the subscription.

4.4 Honest assessment regarding copyright (central — please read). Under the current legal situation in Germany and the EU, copyright protection requires a personal intellectual creation by a human being (Section 2(2), Section 7 of the German Copyright Act, UrhG). Purely AI-generated texts and speech output without a sufficient original human creative contribution are therefore often not protected by copyright. It follows that:

We cannot guarantee the User copyright exclusivity vis-à-vis third parties that may not arise in law at all. German copyright is moreover not transferable as such; only rights of use are transferable (Section 29 UrhG).
We grant the User the best possible package of rights and waive our own claims; any protection depends on the specific human creative contribution (e.g. own texts and voice, creative selection/arrangement/editing).
Insofar as, exceptionally, protectable human contributions of the User exist in the Output or its components, the rights therein remain with the User.

4.5 No uniqueness guarantee. Due to the way generative AI works, the Output may not be unique; other users may receive identical or similar Output. Exclusive availability of precisely "this" audio file for the User alone is not warranted.

5. User Obligations and Restrictions

5.1 The User may not use the Output in a manner that infringes third-party rights or applicable law (see § 4 GTC), in particular not to imitate the voice, name, likeness or distinctive style of real persons/performers without their permission.

5.2 No blocking content-ID claiming. Since the Output is not unique and other users may also receive the same/similar Output, it is prohibited to assert exclusive or blocking claims to the Output (in particular via YouTube Content ID or comparable systems) that would impair us or other authorized users in their use. If such content-ID ownership is nevertheless attributed to a User, it must be revoked without undue delay (within 24 hours) upon request.

5.3 The User may not resell the Output or any derived audio files in isolation as standalone files, sample packs or datasets, nor offer them as AI training data, unless this is expressly covered by the respective plan.

5.4 Any AI labels, watermarks or metadata on the Output may not be removed or manipulated (cf. § 5 GTC, Art. 50 AI Act).

6. Third-Party Models

6.1 Insofar as the Output is generated wholly or partly using third-party technologies (e.g. a third-party AI model), the rights granted to the User in the Output may be limited by the terms of the respective third-party provider. In this case, the rights granted in § 4 apply only to the extent that the third-party provider grants them to us and permits transfer to users.

7. Plan/Usage Scope, Single Use, Team Seats

7.1 The specific scope of the rights granted (e.g. private vs. commercial use, API, team seats) depends on the respective booked plan as per the pricing page.

7.2 Insofar as a plan provides for use by a specific number of persons/seats, any use beyond this is impermissible. In the case of justified suspicion of impermissible multiple use, we are entitled to block the account or to charge additional fees according to the then-applicable price.

8. Term, Termination, Consequences

8.1 Subject to § 4.3 ("Lifetime"), the rights granted under this License Agreement apply for the duration of the respective paid subscription.

8.2 In the case of a not merely insignificant breach of the GTC or License Agreement, or in the case of actual/suspected unauthorized use of the Output, we are entitled to terminate this License Agreement for good cause and to block access.

8.3 A refund of fees already paid is made in the case of justified termination for good cause only to the extent mandatorily required by law (consumer rights remain unaffected).

9. Final Provisions

9.1 The User may only transfer rights under this License Agreement within the scope of the granted transferability/sublicensing (§ 4) and otherwise only with our consent in text form.

9.2 The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods; mandatory consumer protection provisions of the consumer's state of residence remain unaffected.

9.3 Should any provision be invalid, the validity of the remaining provisions remains unaffected.

Terms & Conditions and License Agreement