Terms of Service

1. Introduction and Acceptance

These Terms of Service (the "Terms") form a binding legal agreement between you and SILMA.AI LLC, a limited liability company organized under the laws of the State of Delaware, United States ("SILMA", "we", "us", or "our").

These Terms govern your access to and use of:

• the website at silma.ai and its subpages;
• the voice studio and playground at app.silma.ai;
• the developer documentation and portal at dev.silma.ai;
• the SILMA text-to-speech, voice cloning, and pronunciation control APIs;
• any software, models, SDKs, sample code, dashboards, and support we provide in connection with the above; and
• any on-premises or dedicated deployment we provide under an order form or written agreement.

We refer to all of the above together as the "Services".

By creating an account, generating an API key, calling our API, or otherwise using the Services, you agree to these Terms. If you do not agree, you must not use the Services.

If you are entering into these Terms on behalf of a company, organization, or other legal entity, you represent that you have the authority to bind that entity. In that case, "you" and "your" refer to that entity as well as to you personally.

1.1 Who may use the Services

You may use the Services only if you are at least 18 years old and legally capable of entering into a binding contract. The Services are not designed for, and may not be used by, children. If we learn that an account belongs to someone under 18, we will close it.

You may not use the Services if you are located in, ordinarily resident in, or organized under the laws of a country or territory subject to comprehensive United States trade sanctions, or if you appear on any United States government restricted-party list (including the U.S. Treasury Department's list of Specially Designated Nationals).

1.2 Separate agreements

Some of our software and model weights are published as open source on GitHub and Hugging Face. Those releases are governed by the license file distributed with them, not by these Terms. If you only download and run an open-source SILMA model, these Terms do not apply to that use.

If you sign a separate enterprise agreement, order form, or master services agreement with us, that document controls wherever it conflicts with these Terms.

2. Definitions

3. Your Account

3.1 Registration

To use most of the Services you must create an Account and provide accurate, current, and complete information. You agree to keep that information up to date.

3.2 Account security

You are responsible for everything that happens under your Account, including all Usage and all charges. You must:

• keep your password and API Keys confidential;
• not share API Keys publicly, embed them in client-side code, or commit them to public repositories;
• rotate any API Key you believe has been exposed, using the API Keys screen in the platform; and
• notify us at [email protected] promptly if you suspect unauthorized access.

We are not liable for losses arising from your failure to secure your credentials. We may reset a credential or suspend an Account if we reasonably believe it has been compromised.

3.3 One account per entity

Do not create multiple Accounts to obtain additional free-tier allowances, to evade usage limits, or to circumvent a suspension. Doing so is a material breach of these Terms.

4. The Services

4.1 What we provide

Subject to these Terms and to payment of applicable fees, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the Services during your subscription term, solely for your internal business purposes or for building and operating your own products and applications.

The Services currently include text-to-speech generation in Modern Standard Arabic, Saudi Najdi dialect, and English (including bilingual code-switching), voice cloning, pronunciation overrides, and controls for speaking speed and stylistic variation, delivered through the web studio and through WebSocket, Server-Sent Events, and HTTP REST interfaces.

4.2 What we do not grant

You may not, and may not permit anyone else to:

1. reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code, model weights, architecture, or training data of the Services (except where this restriction is prohibited by applicable law);
2. use Output or any other part of the Services to train, fine-tune, distill, or otherwise develop a competing speech synthesis, voice cloning, or speech model, or to benchmark the Services for the purpose of building such a model;
3. resell, sublicense, or white-label raw API access to the Services as a substantially similar text-to-speech service, as distinct from building your own application on top of them;
4. remove, obscure, or alter any proprietary notice, watermark, or provenance signal we include in Output;
5. circumvent rate limits, quotas, concurrency caps, authentication, or any other technical restriction;
6. probe, scan, or test the vulnerability of our systems, or breach or circumvent any security measure, without our prior written consent;
7. use automated means to scrape or extract data from the Services beyond what the documented API permits; or
8. use the Services in a way that imposes an unreasonable or disproportionately large load on our infrastructure.

4.3 Beta and preview features

We may label some features as beta, preview, experimental, or Labs. These are provided as is, may change or disappear without notice, may have lower availability, and are excluded from any service level commitment. Do not rely on them for production workloads.

4.4 Changes to the Services

We are actively developing the Services and may add, modify, deprecate, or remove features, models, voices, and endpoints. For changes that would materially and adversely affect your production use of a generally available API, we will make reasonable efforts to give you at least thirty (30) days' notice by email or through the platform, and to keep the prior version available during that period.

5. Custom Voices and Voice Cloning

This section is the most important part of these Terms. Read it carefully.

Voice cloning can be used to impersonate real people. We provide it on the strict condition that you have the right to clone every voice you submit and that you use the result responsibly.

5.1 Your consent warranty

Each time you submit a reference recording to create a Custom Voice, you represent and warrant that at least one of the following is true:

(a) It is your own voice. The recording is of you, and you are creating the Custom Voice for your own use.

(b) You have written consent. You have obtained express, informed, written consent from the individual whose voice appears in the recording. That consent must:

• identify SILMA and the SILMA platform, or describe the use of an AI voice synthesis service, by name or by clear description;
• state that a synthetic replica of the speaker's voice will be created and that it may be used to generate speech the speaker never actually said;
• describe the purposes and contexts in which the synthetic voice will be used;
• state how long the synthetic voice may be used and how the speaker may withdraw consent; and
• be signed or otherwise verifiably given by the speaker (or, where the speaker cannot legally consent, by their authorized legal representative).

(c) You hold the necessary rights. You own or have been validly licensed all rights in the recording and in the speaker's voice, name, likeness, and persona sufficient to create and use the Custom Voice, including any rights of publicity, personality rights, performers' rights, moral rights, and any applicable biometric-data rights.

You further warrant that the recording does not contain the voice of a minor, of a deceased person whose estate has not authorized the use, or of a public figure, celebrity, or politician whose voice you are not specifically authorized to replicate.

5.3 Voice takedown

If a person credibly notifies us that a Custom Voice replicates their voice without their consent, we may suspend or delete that Custom Voice and any associated Output, and we may suspend the Account that created it, pending resolution. Notices should be sent to [email protected] with the subject line "Voice Takedown Request".

5.4 Your responsibility for the finished audio

Consent to clone a voice is not consent to say anything in it. You are responsible for what the cloned voice is made to say, and Section 6 applies in full to that Output.

6. Acceptable Use

You must comply with all applicable laws when using the Services. In addition, you must not use the Services, and must not permit your end users to use anything you build on the Services, to create, generate, distribute, or facilitate any of the following.

6.1 Impersonation, fraud, and deception

• Impersonating any real person, organization, or government body without authorization, including through voice cloning, voice conversion, or imitation of a distinctive vocal style.
• Fraud, phishing, vishing, social engineering, or any scheme to obtain money, credentials, personal data, or authorization by deception — including "family emergency" scams, fake support calls, and voice-based identity theft.
• Defeating or attempting to defeat voice-based authentication or biometric verification systems.
• Presenting synthetic audio as an authentic recording of a real person, in a context where a reasonable listener would be misled to their detriment.

6.2 Elections and public deception

• Audio of or attributed to a candidate, election official, party, or government body that misrepresents what they said or did, or that is intended to deceive voters, suppress turnout, or interfere with an election, referendum, or census.
• Fabricated statements attributed to real public figures presented as genuine.
• Coordinated inauthentic behavior, astroturfing, or the mass generation of synthetic voices to simulate grassroots support or opposition.

6.3 Harmful, abusive, and illegal content

• Content that sexualizes, exploits, endangers, or abuses minors in any way. We report suspected child sexual abuse material to law enforcement.
• Non-consensual sexual or intimate content, including sexual content in the cloned voice of a real person.
• Harassment, bullying, stalking, doxxing, threats of violence, or targeted abuse of any individual or group.
• Content that intentionally mocks, degrades, or maliciously attacks religions, religious beliefs, sacred texts, religious figures, or institutions.
• Hate speech, or content that demeans, dehumanizes, or incites hatred or violence against people on the basis of race, ethnicity, national origin, religion, gender, gender identity, sexual orientation, disability, age, or any other protected characteristic.
• Content that promotes, glorifies, or provides instructions for terrorism, violent extremism, self-harm, suicide, or eating disorders.
• Content that promotes or facilitates the creation of weapons capable of mass casualties, illegal weapons, or controlled substances.
• Defamatory content, or content that violates the privacy, publicity, intellectual property, or other rights of any person.

6.4 Regulated and high-risk uses

• Unlawful telephony: robocalls, automated outbound calling, or telemarketing that does not comply with all applicable laws and regulations (including, in the United States, the Telephone Consumer Protection Act and applicable FCC rules on artificial or prerecorded voice messages, and equivalent rules elsewhere). You are solely responsible for consent, calling-time, disclosure, opt-out, and do-not-call obligations.
• Medical, legal, financial, or safety-critical automated advice delivered without appropriate human oversight, professional licensing, and disclosure.
• Use in the operation of nuclear facilities, aircraft navigation, life support, emergency services dispatch, weapons systems, or any environment where failure of the Services could lead to death, personal injury, or severe environmental damage.

6.5 Disclosure of AI-generated audio

Where your listeners would not reasonably expect the voice to be synthetic, you must clearly disclose that the audio is AI-generated. This applies in particular to interactive voice agents, customer support lines, news and documentary content, and any context in which a listener may believe they are hearing a specific real person. Several jurisdictions require this by law; you are responsible for compliance in every market you serve.

6.6 Your end users

If you make the Services available to your own users — for example by building a voice agent product on our API — you must:

• impose terms on your users at least as protective as this Section 6 and Section 5;
• have a working mechanism to receive and act on abuse reports; and
• promptly suspend users who violate those terms.

Your users' conduct is your responsibility as between you and us.

6.7 Enforcement

We may investigate suspected violations. Depending on severity, we may warn you, throttle or restrict your Usage, remove or disable Customer Content or a Custom Voice, suspend or terminate your Account, and report the matter to law enforcement. Where practical and lawful, we will notify you first and give you an opportunity to cure; for violations involving imminent harm, illegality, child safety, or security risk, we may act immediately and without notice.

Suspension for a violation of this Section does not entitle you to a refund.

7. Customer Content and Intellectual Property

7.1 You own your Input

As between you and us, you retain all right, title, and interest in your Input. We claim no ownership of it.

7.2 You own your Output

Subject to your compliance with these Terms and to payment of applicable fees, as between you and us, we assign to you all right, title, and interest we may have in the Output generated from your Input. You may use, reproduce, distribute, modify, publicly perform, and commercialize that Output, including for commercial purposes.

Two important qualifications:

• Similar Output. The Services are generative and are used by many customers. Similar or identical Output may be generated for other customers from similar Input. Our assignment covers only Output generated for you and does not give you exclusivity over any particular audio.
• Copyrightability. Whether purely machine-generated audio attracts copyright protection varies by jurisdiction, and in some countries it may not. We make no representation about the copyright status of Output.

7.3 The license you give us

You grant us a worldwide, non-exclusive, royalty-free license to host, store, copy, transmit, display, and process your Customer Content solely to the extent necessary to:

• operate, provide, and support the Services for you;
• maintain security, prevent abuse, and enforce these Terms;
• comply with law; and
• create aggregated, de-identified statistics that do not identify you, your users, or any individual.

This license ends when the relevant Customer Content is deleted from our systems, except for backups and for records we are required to retain.

7.4 We do not train on your content by default

We do not use your Input or Output to train, fine-tune, or improve our models, and we do not share it with third parties for their training, unless you give us separate, specific, opt-in consent. If you do opt in, you may withdraw that consent at any time, and withdrawal will apply to future training only — we cannot remove content from a model that has already been trained.

An exception applies to content that a human reviewer at SILMA lawfully examines in the course of investigating a specific abuse report or security incident; that review is described in our Privacy Policy.

7.5 Our intellectual property

The Services, including our models, model weights, software, APIs, Documentation, stock Voice Models, website, designs, and the SILMA name and logo, are owned by us or our licensors and are protected by intellectual property law. Except for the limited license in Section 4.1, no rights are granted to you.

7.6 Feedback

If you send us suggestions, feature requests, bug reports, or other feedback, you grant us a perpetual, irrevocable, worldwide, royalty-free license to use it for any purpose without obligation or attribution to you. We will not identify you as the source in public materials without your permission.

7.7 Publicity

We will not use your name or logo in our marketing materials without your prior written consent. If you have given consent, you may withdraw it on thirty (30) days' notice.

7.8 Copyright complaints

If you believe content on the Services infringes your copyright, send a notice to [email protected] with the subject line "Copyright Notice", including: identification of the work you say is infringed; identification of the material and where it is located; your contact details; a statement that you believe in good faith the use is not authorized; a statement, under penalty of perjury, that the information is accurate and that you are the rights holder or authorized to act for them; and your signature.

We will respond to properly submitted notices, and we may remove material and terminate the accounts of repeat infringers.

8. Fees, Billing, and Subscriptions

8.1 Plans and pricing

The Services are offered on a free tier and on paid plans. Current pricing, plan limits, concurrency caps, and included allowances are published on our website and in the Subscription area of the platform. At the time these Terms take effect, the free tier includes the first 5 minutes of generated audio at no cost, and paid usage starts at $0.025 per minute of generated audio.

Unless otherwise stated, all amounts are in United States dollars.

8.2 Metering

We meter Usage on our systems, principally by minutes (or seconds) of audio generated. Our metering records are the authoritative basis for billing, absent manifest error. You can review your consumption in the Usage area of the platform. If you believe a charge is wrong, contact [email protected] within thirty (30) days of the invoice date and we will investigate in good faith.

8.3 Payment

You authorize us and our payment processor to charge your designated payment method for all fees, including recurring subscription fees and usage-based overage. Subscriptions renew automatically at the end of each billing period at the then-current rate until cancelled.

Paid amounts are non-refundable except where these Terms expressly say otherwise or where refund is required by law. We do not provide refunds or credits for partial billing periods, unused allowances, or minutes generated but not used by you.

8.4 Failed payments

If a payment fails, we may retry the charge, restrict your access, downgrade you to the free tier, or suspend the Account.

8.5 Taxes

Fees are exclusive of taxes. You are responsible for all sales, use, value-added, withholding, and similar taxes, other than taxes on our net income. If you are required to withhold any amount, you will gross up the payment so that we receive the full amount invoiced.

8.6 Price changes

We may change pricing. For an existing paid plan, we will give you at least thirty (30) days' notice before a price increase takes effect, and the new price applies from your next renewal. If you do not accept the change, your remedy is to cancel before it takes effect.

8.7 Free tier

The free tier is provided for evaluation. We may change, limit, or discontinue it at any time, and we may suspend free-tier Accounts that are inactive, abusive, or used to circumvent paid limits.

9. Third-Party Services

The Services may link to or interoperate with third-party services, and we use third-party infrastructure and payment providers to operate. We are not responsible for third-party services, and your use of them is governed by their own terms. Our Privacy Policy lists the categories of providers who process data on our behalf.

10. Confidentiality

Each party may receive non-public information of the other ("Confidential Information"). The receiving party will protect it with at least reasonable care, use it only to perform under these Terms, and not disclose it except to employees, contractors, and advisors who need it and are bound by confidentiality obligations.

This does not apply to information that is or becomes public without breach, was already known to the recipient without a duty of confidence, is independently developed, or is rightfully received from a third party. A party may disclose Confidential Information where legally compelled, after giving the other party reasonable notice where lawful.

Your Customer Content is your Confidential Information. Our non-public Documentation, pricing, roadmap, and technical information are ours.

11. Warranties and Disclaimers

11.1 Your warranties

You represent and warrant that:

• you have the legal right and all necessary rights, consents, licenses, and permissions to submit every Input you submit and to use the resulting Output;
• your Input does not infringe or misappropriate any third party's intellectual property, privacy, publicity, or other rights;
• your use of the Services complies with these Terms and with all applicable laws, including data protection, biometric privacy, consumer protection, telemarketing, advertising, export control, and sanctions laws; and
• you will not use the Services for any purpose prohibited by Section 5 or Section 6.

11.2 Our disclaimer

THE SERVICES ARE PROVIDED "AS IS" AND "AS AVAILABLE". TO THE MAXIMUM EXTENT PERMITTED BY LAW, SILMA DISCLAIMS ALL WARRANTIES, EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, ACCURACY, AND NON-INFRINGEMENT.

We do not warrant that the Services will be uninterrupted, error-free, or secure; that defects will be corrected; that latency figures, throughput, or quality benchmarks published on our website will be achieved in your environment; or that Output will be accurate, appropriate, correctly pronounced, free of artifacts, or suitable for any particular purpose.

Speech synthesis is probabilistic. Output may contain mispronunciations, unexpected intonation, artifacts, or errors, including in ways that change meaning. You are responsible for reviewing Output before relying on it or publishing it, particularly in any context where an error could cause harm.

Any service level commitment applies only if it is set out in a separate written agreement or order form signed by us.

Some jurisdictions do not allow the exclusion of implied warranties, so parts of this Section may not apply to you.

12. Indemnification

12.1 Your indemnity

You will defend, indemnify, and hold harmless SILMA, its affiliates, and their officers, directors, employees, and agents from and against any third-party claim, demand, suit, proceeding, or regulatory action, and all resulting losses, damages, liabilities, settlements, fines, penalties, costs, and reasonable attorneys' fees, arising out of or relating to:

1. your Input, your Output, or any use you or your end users make of them;
2. any Custom Voice you create, including any claim that a voice was cloned or used without the speaker's consent or in violation of a right of publicity, personality right, or biometric privacy law;
3. your breach of these Terms, including Sections 5, 6, and 11.1;
4. your violation of any law or of any third party's rights; or
5. any dispute between you and your end users.

12.2 Process

We will notify you of the claim, give you control of the defense (except that you may not settle in a way that admits our liability or imposes obligations on us without our written consent), and cooperate reasonably at your expense. We may participate with our own counsel at our own cost.

13. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW:

(a) Excluded damages. Neither party will be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost profits, lost revenue, lost business, lost goodwill, or loss or corruption of data, however caused and under any theory of liability, even if advised of the possibility.

(b) Cap. Each party's total aggregate liability arising out of or relating to these Terms or the Services will not exceed the greater of (i) the total fees you paid to us in the twelve (12) months immediately before the event giving rise to the claim, or (ii) one hundred United States dollars (US$100).

(c) Exceptions. The exclusions and cap above do not apply to: your payment obligations under Section 8; your indemnification obligations under Section 12; your breach of Sections 4.2, 5, or 6; either party's breach of confidentiality; or liability that cannot be limited by law, including fraud, willful misconduct, or death or personal injury caused by negligence.

(d) Basis of the bargain. You acknowledge that these limitations are an essential part of the agreement between us and are reflected in our pricing.

Some jurisdictions do not allow certain limitations of liability, so parts of this Section may not apply to you.

14. Term, Suspension, and Termination

14.1 Term

These Terms apply from the moment you first access the Services and continue until terminated.

14.2 Your right to terminate

You may stop using the Services and close your Account at any time through the platform or by writing to [email protected]. Cancellation takes effect at the end of your current billing period; fees already paid are not refunded.

14.3 Our right to suspend or terminate

We may suspend or terminate your access, in whole or in part:

• immediately, for a material breach of these Terms, for any violation of Section 5 or Section 6, for non-payment, for a security or legal risk, or where required by law; or
• for convenience, on thirty (30) days' notice, in which case we will refund any prepaid fees covering the period after termination.

14.4 Effect of termination

On termination, your license to the Services ends and you must stop using them. We will delete or de-identify your Customer Content in accordance with our Privacy Policy. Export anything you need before terminating — we are not obliged to retain Customer Content after termination, and after a reasonable wind-down period we may delete it permanently.

14.5 Survival

Sections 2, 4.2, 5.1–5.2, 6, 7, 8 (for amounts accrued), 10, 11.2, 12, 13, 14.4, 14.5, 15, 16, and 17 survive termination.

15. Governing Law and Disputes

15.1 Governing law

These Terms and any dispute arising out of or relating to them or the Services are governed by the laws of the State of Delaware, United States, without regard to its conflict-of-laws rules. The United Nations Convention on Contracts for the International Sale of Goods does not apply.

15.2 Informal resolution first

Before filing any claim, you agree to contact us at [email protected] with a written description of the dispute and to negotiate in good faith for thirty (30) days. Most disputes can be resolved this way.

15.3 Venue

If informal resolution fails, the state and federal courts located in Wilmington, Delaware, United States will have exclusive jurisdiction, and both parties consent to personal jurisdiction and venue there and waive any objection based on inconvenient forum.

15.4 Waiver of jury trial and class actions

To the extent permitted by law, each party waives any right to a jury trial, and each party may bring claims only in its individual capacity, not as a plaintiff or class member in any class, collective, or representative proceeding.

15.5 Time limit

Any claim arising out of these Terms must be brought within one (1) year after it arises, or it is permanently barred, except where a longer period is required by law.

16. Export Control and Sanctions

You will comply with all applicable export control and economic sanctions laws, including those of the United States. You will not export, re-export, or make the Services available to any person, entity, or destination prohibited by those laws, and you represent that you are not subject to any such prohibition.

17. General Terms

17.1 Changes to these Terms. We may update these Terms. For material changes we will give at least thirty (30) days' notice by email or through the platform before they take effect. Your continued use after the effective date constitutes acceptance. If you do not accept a change, stop using the Services and close your Account before the effective date.

17.2 Entire agreement. These Terms, together with our Privacy Policy and any order form or enterprise agreement, are the entire agreement between us and supersede all prior discussions and understandings on this subject.

17.3 Assignment. You may not assign these Terms without our prior written consent, except to a successor in a merger, acquisition, or sale of substantially all assets, on written notice to us. We may assign freely. Any prohibited assignment is void.

17.4 Severability. If any provision is held unenforceable, it will be modified to the minimum extent necessary to make it enforceable, or severed, and the rest of these Terms will remain in effect.

17.5 No waiver. Our failure to enforce a provision is not a waiver of our right to enforce it later.

17.6 Force majeure. Neither party is liable for delay or failure caused by events beyond its reasonable control, including natural disasters, war, terrorism, civil unrest, labor disputes, governmental action, internet or utility outages, and failures of third-party infrastructure providers. This does not excuse payment obligations.

17.7 Independent contractors. Nothing in these Terms creates a partnership, joint venture, agency, employment, or fiduciary relationship.

17.8 No third-party beneficiaries. These Terms create no rights for anyone who is not a party, except that our affiliates, officers, directors, employees, and agents may enforce Sections 12 and 13.

17.9 Notices. We may give notice by email to the address on your Account, or by posting in the platform. Notices to us must be sent to [email protected] and, for legal notices, in writing to the address in Section 18.

17.11 Language. These Terms are drafted in English. Any translation is provided for convenience; the English version controls in the event of a conflict.

18. Contact Us

SILMA.AI LLC A Delaware limited liability company

General and legal enquiries: [email protected] Abuse and voice takedown requests: [email protected] (subject line: "Abuse Report" or "Voice Takedown Request") Website: https://silma.ai