Terms of Service

Effective August 21, 2026

1. The agreement

These Terms govern your use of the Mastline website and application (the “Service”), operated by Storyworlding (“Mastline”). By creating an account or using the Service you agree to these Terms and to Mastline’s Privacy Policy. If you use Mastline on behalf of a team or agency, you confirm you have authority to bind it.

2. Your content stays yours

You retain all copyright and other rights in the photographs, video, captions, records, and other material you add to Mastline (“Your Content”). Mastline does not acquire ownership of Your Content, ever. You grant Mastline a limited, non-exclusive license to host, store, process, display, and transmit Your Content solely to operate the Service for you and at your direction, for example to render previews, generate watermarks, send pitches you approve, and deliver files under licenses you accept. This license ends when you delete the content or close your account, except for copies Mastline must keep under Section 11.

You are responsible for Your Content and confirm you have the rights needed to upload it and to license it through Mastline.

3. Sales, licenses, and the 70/30 split

• Sales you make yourself. If you record, invoice, or track a sale in Mastline that you arranged through your own relationships, agency, or portal, Mastline charges no commission. You keep 100%.
• Sales made through Mastline. When an image is licensed through a Mastline opportunity, a pitch sent through the platform, or a buyer request it helps close (a “Mastline Sale”), you receive 70% and Mastline receives 30% of the license fee, calculated after taxes, refunds, chargebacks, and discounts. Standard payment-processing costs are paid from Mastline’s share.
• Licenses. You set the price and terms of every license. Mastline generates the license document from your choices and records the buyer’s acceptance. Mastline is not a party to the license between you and the buyer.
• Payouts. Where Mastline collects payment on your behalf, it remits your share according to the payout schedule in your plan, less any amounts owed to it.

4. Plans, billing, and trials

Paid plans are billed monthly or annually in advance. Your 30-day trial converts to the plan you selected unless you cancel before it ends. You can change or cancel your plan at any time; changes take effect at the next billing cycle and annual plans are prorated as described on Mastline’s Pricing page. Fees are non-refundable except where required by law. Mastline may change prices with at least 30 days’ notice.

5. Acceptable use

You agree not to use the Service to:

• upload content you do not have the right to use or license, or that infringes anyone’s rights;
• harass, stalk, threaten, or endanger any person, or coordinate others to do so;
• collect or store information about individuals’ private locations or activities beyond what is lawful in the relevant jurisdiction;
• upload sexual or exploitative content involving minors, or any unlawful content;
• misrepresent the provenance of an image, or present altered or synthetic imagery as editorial;
• interfere with the Service, probe its security, or access another user’s account or data without permission.

Mastline may suspend or terminate accounts that violate these rules, and Mastline will cooperate with lawful requests from authorities in cases involving harm to any person. A plain-language summary is at Acceptable use; copyright notices and counter-notices are handled under Mastline’s Copyright and DMCA Policy, including termination of repeat infringers.

6. Suggestions are suggestions

Mastline offers automated suggestions such as captions, buyer fit, price bands, archive matches, and suspected rights matches. These are aids to your judgment. They may be wrong. You are responsible for reviewing and confirming every caption, pitch, price, license, invoice, and rights action before it goes out. Mastline does not provide legal advice, and a rights match is not a determination that any use is unauthorized.

7. Buyers and third parties

Editors and buyers who receive your pitches interact with Mastline through links you send. They are not required to hold accounts. Mastline is not responsible for a buyer’s decisions, payment behavior, or use of licensed material beyond what Mastline records. Third-party services you connect are governed by their own terms.

8. Teams

On team and agency plans, the account owner controls roles, permissions, and revenue splits, and is responsible for the actions of team members. Content uploaded by a team member is treated as the content of the account unless your team agreement with that member says otherwise; Mastline is not a party to that agreement.

9. Intellectual property of the Service

Mastline, its software, design, and trademarks belong to Mastline and its licensors. You may not copy, modify, reverse-engineer, or resell the Service. Feedback you give Mastline may be used without obligation to you.

10. Availability and support

Mastline works hard to stay available, especially at night when it is needed, but does not guarantee uninterrupted service. Support is available at support@mastline.co.

11. Termination and your data

You may close your account at any time. Mastline may suspend or terminate your account for breach of these Terms, with notice where practical. On termination, you can export all of Your Content and records for 30 days, after which Mastline deletes them as described in its Privacy Policy, except for license and provenance records it is required to keep, or that you ask it to preserve as evidence.

12. Disclaimers and limitation of liability

The Service is provided “as is” and “as available.” To the fullest extent permitted by law, Mastline disclaims all warranties, express or implied, and is not liable for indirect, incidental, special, consequential, or punitive damages, or for lost profits, revenue, or data. Mastline’s total liability for any claim arising from the Service will not exceed the greater of the fees you paid Mastline in the twelve months before the claim or US$100. Some jurisdictions do not allow these limitations, in which case they apply to the maximum extent permitted.

13. Indemnity

You agree to defend and indemnify Mastline against claims arising from Your Content, your use of the Service, or your breach of these Terms, including claims by the subjects of your photographs or by buyers.

14. Governing law and disputes

These Terms are governed by the laws of the State of New York, without regard to conflict-of-law rules. Disputes will be resolved in the state or federal courts located in New York County, New York, and you consent to their jurisdiction.

15. Changes to these Terms

Mastline may update these Terms. For material changes Mastline will give at least 30 days’ notice by email or in the product. Continued use after the effective date means you accept the new Terms.

16. Contact

Storyworlding · 155 Prince Street, Floor 3, New York, NY 10012 · legal@mastline.co