Terms of service

Last updated: 5 October 2026

1. About these terms

1.1 These terms are an agreement between Mestra Labs Pty Ltd (ABN 73 702 936 356) of Sydney, New South Wales, Australia ("Mestra", "we", "us") and the organisation that signs up for Mestra ("you"). "Mestra by Thirty Oars" is our brand byline. Your contract is with Mestra Labs Pty Ltd.

1.2 "The service" means Mestra: the web app at app.withmestra.com, the Mestra apps for Adobe InDesign, Figma and Canva, and anything else we provide under these terms.

1.3 These terms include our Privacy Policy and the pricing shown when you subscribe. If you have a separate signed agreement with us (for example an Enterprise agreement), that agreement wins where it differs from these terms.

2. Who can use Mestra

2.1 Business use only. Mestra is for businesses: shopping-centre groups, agencies, studios and designers producing advertising for themselves or their clients. It isn't for personal, domestic or household use. By signing up, you tell us you're acquiring the service for business purposes.

2.2 Authority. The person who signs up, or who accepts these terms for an organisation, must be at least 18 and have authority to bind that organisation. They accept these terms for the organisation, and the organisation is responsible for everyone it lets use its account.

2.3 Your rights under the Australian Consumer Law. Even though Mestra is for business use, the Australian Consumer Law may still give you guarantees that can't be excluded. Nothing in these terms excludes, restricts or changes any right or remedy you have under the Australian Consumer Law or any other law that can't lawfully be excluded. Where these terms say we "don't promise" something or "aren't liable" for something, that is always subject to this clause.

3. Your account

3.1 Organisations and roles. Your account is an organisation in Mestra. People join it as an owner, editor or viewer. Every organisation must have at least one owner. Owners manage members, billing and settings.

3.2 Seats. Every plan includes unlimited seats. Invite only people who work for you or with you on your work, such as staff, contractors or clients.

3.3 Keeping access secure. You're responsible for:

keeping members' email accounts and devices secure, because sign-in links are sent by email;
removing people who should no longer have access, and revoking app sign-ins you don't recognise;
everything done through your organisation's account, unless it was caused by our failure to take reasonable care.

3.4 Tell us about misuse. If you think someone has accessed your account without permission, email security@withmestra.com straight away.

3.5 Accurate details. Keep your organisation's name, owners' email addresses and billing details up to date. We send important notices (billing, read-only and deletion warnings) to your owners by email.

4. The free trial

4.1 What's included. A new organisation can start a free trial of 14 days, with 1 brand and 80 formats.

4.2 Work email and free-mail.

If you sign up with a work email address, you get the whole trial without adding a card.
If you sign up with a free-mail address (such as Gmail or Outlook), you get 20 formats without a card. To unlock the other 60, an owner adds a card through Stripe. This is a check only and we don't charge it. Your bank may briefly show a $0 or $1 authorisation that is then released.

4.3 One trial each. There is one trial per work email domain, per email address and per card. If someone at your domain already has Mestra, we'll suggest you ask them for an invite instead. Don't try to get more than one trial, for example by using different addresses, email tricks or another card.

4.4 Approval and limits. We may hold a sign-up for review, approve it by hand, limit how many trials start each day, or decline a sign-up, including where we suspect abuse. You need to verify your email address and pass an automated check that you're human.

4.5 Sample brand. We add a sample brand, campaign and master so you can try Mestra quickly. Formats built for the sample brand don't count towards your trial or plan, but each organisation can build up to 40 sample formats in total. Use the sample material only to evaluate Mestra.

4.6 When the trial ends. The trial ends after 14 days or when you've used its formats, whichever comes first. We'll remind owners on day 10, on day 13 and when 80% of the trial formats are used. If you don't subscribe, your organisation becomes read-only (clause 14).

4.7 No charge, no automatic subscription. The trial is free. It doesn't turn into a paid plan unless an owner subscribes.

4.8 Trial is provided as is. Because the trial is free, it's provided as is, subject to clause 2.3.

5. Plans, billing and overage

5.1 Plans. Paid plans are Starter, Team and Agency. Each includes a number of brands and a number of formats a month, shown on our pricing page and at checkout. Enterprise plans are agreed separately.

5.2 Prices. Prices are in US dollars and exclude tax. Your bank may charge currency conversion fees. Those are yours to pay.

5.3 Monthly or annual. You can pay monthly, or annually upfront. An annual plan costs 10 times the monthly price. Your included formats reset every month on either.

5.4 Automatic renewal. Your plan renews automatically at the end of each month or year, and we charge the card or payment method on file, until an owner cancels (clause 6).

5.5 Payments through Stripe. Payments are processed by Stripe. You subscribe through Stripe Checkout and manage your card, invoices, billing address and tax ID through the Stripe Customer Portal. We never see or store your full card details. Stripe's own terms apply to your use of its services.

5.6 What counts as a format. A format is one output size built for one brand in one run, for example a 1080×1920 digital screen.

A format counts once, when Mestra has planned its layout in a run.
If you cancel a run, formats not yet planned don't count. Formats already planned do count.
A format that fails never counts.
A review of a format that has already counted doesn't count again.
Try again on a format that's already built is free 3 times for that format in that run. The 4th and each later Try again that builds counts as one more format.
Building the same size again in a new run counts again.

5.7 Overage. If you build more formats in a month than your plan includes, each extra format is charged at your plan's per-format overage rate. Overage is billed monthly in arrears, including on annual plans.

5.8 Your overage cap. Owners set a monthly cap on overage spending.

The default cap equals your plan's monthly price.
A cap of $0 stops runs when you reach your included formats.
When a run would take you over the cap, it doesn't start. Runs resume when an owner raises the cap, upgrades, or the next month begins.
We email owners at 80% and 100% of included formats, and when the cap is reached.

5.9 Daily limit. To protect the service, each organisation has a daily processing limit, currently 500 AI requests per day (resetting at midnight UTC). If you reach it, runs pause until the next day. Email support@withmestra.com if you need more.

5.10 Changing plans. Owners change plans on the Billing page in the app.

Upgrades (a higher plan, or monthly to annual) apply straight away. We charge a prorated amount for the rest of the current period, and your included formats go up at once.
Downgrades (a lower plan, or annual to monthly) apply at the end of the current period.
If you have more brands than your new plan allows, runs stop until you remove brands or upgrade.
Overage already billed stays at the rate it was billed at.

5.11 Taxes. We're registered for GST. Australian customers pay 10% GST on top of the price. Stripe Tax calculates it, and we'll issue tax invoices through Stripe. Customers outside Australia aren't charged Australian GST, and are responsible for any taxes, duties or reverse-charge obligations in their own country.

5.12 Price changes. Prices on our site are launch pricing and may change. We'll give owners at least 30 days' notice by email before a price change affects you. A new price applies from your next renewal. An annual plan keeps its price until the end of the year you've paid for. If a price change is materially adverse to you, you can cancel before it takes effect, and clause 20.3 applies.

5.13 Failed payments.

If a payment fails, Stripe retries it over about two weeks, and we email owners asking them to update the card.
Runs continue while we retry.
If an invoice is still unpaid 14 days after the first failed attempt, your organisation becomes read-only (clause 14) until it's paid.
Paying the overdue invoice restores your organisation straight away.

5.14 Money still owed. Read-only status, cancellation or deletion of your data doesn't cancel amounts you already owe for usage or a period that has started.

5.15 Billing errors. If you think we've charged you incorrectly, email support@withmestra.com within 60 days of the charge and we'll look into it. If two subscriptions are created for one organisation by mistake, we cancel the extra one and refund it in full.

6. Cancelling and refunds

6.1 Cancelling. An owner can cancel at any time in the Customer Portal (Manage billing). Cancellation takes effect at the end of the current paid period. Until then, you keep using your plan. After that, your organisation becomes read-only (clause 14). You can resubscribe at any time.

6.2 Refunds. Fees are charged in advance and aren't refunded for part of a month or year, for unused formats, or if you stop using Mestra during a period, except as set out in these terms or as required by law.

6.3 Your statutory rights. Clause 6.2 doesn't limit any refund or other remedy you're entitled to under the Australian Consumer Law, for example if the service has a major failure.

7. Using Mestra properly

7.1 You must not, and must not let anyone else:

use Mestra for anything unlawful, or to make advertising that is false, misleading or deceptive;
upload or process content you don't have the right to use, or that infringes anyone's intellectual property, privacy or other rights;
upload content that is defamatory, obscene, hateful, harassing or harmful, or that breaks Anthropic's Usage Policy, which applies to content you submit for AI processing;
copy, modify, decompile, disassemble or reverse engineer the service, the apps or their underlying models, prompts or methods, except where the law allows this despite this restriction;
get around or test our limits, security, trial rules, usage metering or overage cap, or try to access another organisation's data;
run load, stress or security tests, except under our published vulnerability disclosure policy;
scrape the service, use bots to drive it beyond normal use, or interfere with its operation;
resell, sublicense or provide Mestra to third parties as a stand-alone service, other than letting your clients use it as members of your organisation;
use Mestra or its outputs to build or train a competing product;
introduce malware, or share sign-in links, app tokens or access with people outside your organisation.

You are responsible for your members' compliance with Anthropic's Usage Policy. We may suspend access if content breaches it, and we may need to share information with Anthropic to investigate.

7.2 If you break this clause, we may suspend or end your access (clause 14).

8. Your content

8.1 What "your content" means. Your content is everything you or your members put into Mestra or that the apps read from your masters. That includes the composition of a master (copy, fonts, positions, image link names and paths), brand settings, logos, campaign copy and settings, rendered previews, and exported files stored in the optional library.

8.2 You own it. You keep all rights in your content. We don't claim ownership of it.

8.3 Your licence to us. You give us a non-exclusive, worldwide, royalty-free licence to host, copy, process, transmit and display your content, and to share it with our sub-processors, only as needed to provide, secure and support the service for you, and as the law requires. This licence ends when your content is deleted from our systems under clause 14 and our Privacy Policy.

8.4 We don't keep your masters. The apps read the structure of your master to build formats. We don't keep the working data the apps send us (the composition, the plans or the AI's notes) after a request finishes. Your editable masters and outputs stay in your design tool and your own folders. Settings you enter, such as campaign copy and logos, and any files in the optional library, are kept until you delete them or they expire.

8.5 Your promises about content. You promise that:

you have all the rights, licences and permissions needed for us to process your content under these terms, including for fonts, images, logos, trade marks and the likeness of any person shown;
your content doesn't break any law or anyone's rights;
where your content includes personal information about other people, you're allowed to give it to us for processing under these terms and our Privacy Policy.

8.6 Removing content. We may remove or refuse to process content if we reasonably believe it breaks these terms or the law. Where practical, we'll tell you first.

9. Outputs

9.1 Outputs are yours. "Outputs" are the layouts and files Mestra builds for you from your content. As between you and us, you own the outputs. To the extent we have any rights in them, we assign those rights to you when they're created.

9.2 What isn't yours. We keep all rights in the service itself: our software, the apps, our methods, format packs, the sample brand and sample material, and our trade marks, including MESTRA. You can use format packs and sample material only within Mestra.

9.3 Similar outputs. Other customers may get similar layouts from Mestra. That's normal for a layout tool. We don't promise that outputs are unique or that they can be protected by copyright or registered.

10. AI-built layouts: check before you use them

10.1 How Mestra works. Mestra uses an AI model to plan each format's layout and to review the built result. It flags issues it finds.

10.2 Always review outputs. AI can make mistakes. Text can be cut off or moved, elements can be cropped or placed poorly, and review flags won't catch everything. Before you publish, print or send any output, you must check it.

10.3 You're responsible for final artwork. You're responsible for the final artwork and for its compliance, including:

whether it's accurate and not misleading;
advertising, consumer, trade mark and other laws;
brand rules, landlord and centre requirements, and media owners' and printers' specifications;
any permissions, terms or disclaimers your campaign needs.

10.4 No guarantee of perfection. Subject to clause 2.3, we don't promise that outputs will be error-free, suitable for any particular purpose, or accepted by any media owner, printer or platform.

11. Feedback

If you send us suggestions, ideas or feedback, we can use them freely, without paying you or giving you credit. This doesn't give us any rights in your content.

12. Confidentiality

12.1 Confidential information means non-public information one of us gives the other in connection with Mestra that is marked confidential or that a reasonable person would treat as confidential. Your content is your confidential information. Our non-public security documents, policies and pricing terms are ours.

12.2 Each of us will:

use the other's confidential information only for the purposes of these terms;
protect it with reasonable care;
share it only with employees, contractors, sub-processors and advisers who need it for those purposes and are bound to keep it confidential.

12.3 Exceptions. This doesn't apply to information that is or becomes public without a breach of these terms, that the receiver already had or developed independently, or that it received from someone else lawfully. Either of us may disclose information where the law, a court or a regulator requires it, giving the other notice first where the law allows.

13. Privacy, data protection and security

13.1 Privacy Policy. Our Privacy Policy explains how we handle personal information. It forms part of these terms.

13.2 Security. We take reasonable steps to protect your content and personal information. How we do this is described at our trust site, withmestra.com/trust. Our security policies are available on request.

13.3 Sub-processors. We use other providers ("sub-processors") to run Mestra, such as hosting, storage, email, payments and AI processing. They're listed at withmestra.com/trust/subprocessors. We'll give at least 30 days' notice before adding or replacing a sub-processor that handles customer data, by email to owners and to anyone who has asked to be notified. If you reasonably object to a new sub-processor, you can cancel with a pro-rata refund of prepaid fees for the unused part of the current billing period, from the date the ending takes effect.

13.4 Security incidents. If a security incident affects your data, we'll tell your owners without undue delay, and we aim to do so within 72 hours of confirming it. We'll tell you what happened, what data was involved, what we've done and what you should do. If you have your own reporting duties, we'll give you the facts we have.

13.5 Data processing agreement. On request, we offer paying customers a standard data processing agreement (DPA), with the sub-processor list as a schedule.

14. Read-only, suspension, termination and your data

14.1 Read-only. Your organisation becomes read-only when:

your trial ends without a subscription;
an invoice is 14 days unpaid; or
your subscription ends (for example after you cancel).

While read-only, members can still sign in, view and download, but can't start runs or change settings. Subscribing, or paying the overdue invoice, restores your organisation straight away.

14.2 Data kept for 60 days, then deleted. When your organisation becomes read-only, we keep its data for 60 days. About 7 days before deletion, we email your owners a warning with the deletion date. If you don't subscribe by then, we permanently delete your organisation's brands, campaigns, formats, settings, logos, run records, library files, invites, app sign-ins and memberships. This can't be undone. After deletion we keep only what our Privacy Policy describes, such as anonymous usage counts and billing records.

14.3 Exporting your data. Your editable outputs are already in your design tool and folders. Before deletion, you can download library files (one at a time or a run as a zip) and read your brand, format and campaign settings through the app or API. For account and audit records, email privacy@withmestra.com.

14.4 Suspension. We may suspend all or part of your access, or make your organisation read-only, if:

you seriously or repeatedly break these terms, especially clause 7;
we reasonably believe your use puts the service, other customers or third parties at risk, or is fraudulent or unlawful;
the law, a court or a regulator requires it.

We'll tell you why, and give notice first where it's reasonable to do so. We'll lift the suspension once the reason is resolved. Suspension on its own doesn't start the 60-day deletion period.

14.5 Ending by you. You can stop using Mestra at any time by cancelling under clause 6. You can also ask us to delete your organisation sooner by emailing privacy@withmestra.com.

14.6 Ending by us for breach. We may end these terms by notice if you materially break them and don't fix the breach within 14 days of our notice (if it can be fixed), or if you become insolvent. Your organisation then becomes read-only and clause 14.2 applies.

14.7 Ending by us for other reasons. We may end the service, or your subscription, for reasons other than your breach, by giving you at least 30 days' notice by email. We'll give you a pro-rata refund of prepaid fees for the unused part of the current billing period, from the date the ending takes effect. Your organisation then becomes read-only, and clauses 14.2 and 14.3 apply, so you can export your data.

14.8 What survives. Clauses about payment owed, content and outputs, confidentiality, liability, indemnities, governing law and anything else that by its nature should survive, continue after these terms end.

15. Third-party apps and services

15.1 Mestra works with Adobe InDesign, Figma and Canva. You need your own accounts and licences for those products, and their terms apply to your use of them. Mestra isn't made, endorsed or supported by Adobe, Figma or Canva.

15.2 Changes those companies make to their products, plugin platforms or terms may affect how the Mestra apps work, or whether they can be offered. We'll make reasonable efforts to keep the apps working, but we aren't responsible for third-party products.

15.3 If you sign in with Google or Microsoft, or pay through Stripe, their terms also apply to those services.

16. Availability and changes to the service

16.1 No service level. We aim for Mestra to be available at all times, but we don't guarantee it and we don't offer a service level agreement (SLA). Mestra may be unavailable for maintenance, which we'll announce where we can, or for reasons outside our control. Current status is at status.withmestra.com.

16.2 Changes to Mestra. We improve Mestra over time and may add, change or remove features. If we remove a feature that is central to the plan you've paid for, we'll give you at least 30 days' notice. You can then end your subscription, and we'll give you a pro-rata refund of prepaid fees for the unused part of the current billing period, from the date the ending takes effect, as clause 14.7 describes.

16.3 Early features. Features marked beta, preview or coming soon are provided as is and may change or be withdrawn.

17. Warranties and disclaimers

17.1 What we promise. We'll provide Mestra with due care and skill, and as described in our documentation in all material respects.

17.2 What we don't promise. Subject to clause 2.3, and to the extent the law allows, we don't give any other promise, warranty or guarantee, whether express or implied, including that Mestra will be uninterrupted or error-free, or that outputs will meet your requirements.

17.3 Limiting our liability under the consumer guarantees. Where the law lets us limit our liability for failing to meet a consumer guarantee, and it is fair and reasonable to do so, our liability is limited, at our option, to supplying the services again or paying the cost of having them supplied again.

18. Limitation of liability

18.1 Indirect loss. Subject to clause 2.3, neither of us is liable to the other for any indirect or consequential loss, or for loss of profit, revenue, business, goodwill or anticipated savings, however it arises.

18.2 Cap. Subject to clause 2.3, our total liability to you for all claims arising out of or in connection with these terms or the service is limited to the fees you paid us in the 12 months before the claim. For a free trial, it is limited to US$100.

18.3 What the cap doesn't cover. Clauses 18.1 and 18.2 don't limit:

liability that can't be limited by law, including under the Australian Consumer Law;
liability for fraud or wilful misconduct;
your obligation to pay fees and charges.

18.4 Your part. Our liability is reduced to the extent you or your members caused or contributed to the loss, including by not checking outputs under clause 10.

18.5 Your masters. You hold the originals of your masters and editable outputs. We aren't a backup or archive service, and the optional library is a convenience copy only.

19. Indemnity

You indemnify us against third-party claims, and the reasonable costs of defending them, to the extent they arise from your content, the outputs as you used them, or your breach of clause 7. This indemnity is reduced to the extent we caused or contributed to the claim. We'll tell you promptly about a claim, let you control its defence, and give you reasonable help at your cost.

20. Changes to these terms

20.1 We may update these terms from time to time, for example to reflect changes to Mestra, the law or our providers.

20.2 For a material change, we'll email your owners at least 30 days before it takes effect, and show it on this page. Changes that only correct errors, or that are needed to comply with the law, may take effect sooner.

20.3 If you don't agree to a material change, you can cancel before it takes effect. If you cancel because of a materially adverse change, we'll give you a pro-rata refund of prepaid fees for the unused part of the current billing period, from the date the change takes effect.

20.4 If you keep using Mestra after a change takes effect, the updated terms apply.

21. Governing law

These terms are governed by the laws of New South Wales, Australia. Each of us submits to the non-exclusive jurisdiction of the courts of that state and the courts that can hear appeals from them.

22. Notices

22.1 To you. We send notices by email to your organisation's owners, or show them in the app. An email notice is treated as received when it's sent, unless we get a delivery failure.

22.2 To us. Send notices to support@withmestra.com, with "Legal notice" in the subject. For privacy matters, use privacy@withmestra.com. For security matters, use security@withmestra.com. Our emails come from an address that doesn't accept replies, so please use these addresses.

23. General

23.1 Whole agreement. These terms, the Privacy Policy and the pricing shown at checkout are the whole agreement between us about Mestra. They replace anything said or agreed before about the same subject.

23.2 Transfer. You may not transfer your rights under these terms without our written consent, which we won't unreasonably refuse. We may transfer them to a buyer of all or part of our business, or to a related company, with notice to you, as long as your rights under these terms aren't reduced.

23.3 Subcontractors. We may use subcontractors and sub-processors to provide Mestra. We remain responsible for what we've promised in these terms.

23.4 Events outside our control. Neither of us is liable for a delay or failure caused by events outside our reasonable control, such as outages at our providers, internet failures, natural disasters or government action. This doesn't excuse paying fees that are due.

23.5 Severability. If any part of these terms is invalid or unenforceable, it is read down or removed so the rest still applies.

23.6 Waiver. Not enforcing a right straight away doesn't mean we, or you, give it up.

23.7 Relationship. Nothing in these terms creates a partnership, employment or agency between us.

23.8 Accepting these terms. You accept these terms by ticking the box at sign-up, or by using Mestra. Electronic acceptance is binding.

Contact

Mestra Labs Pty Ltd (ABN 73 702 936 356), Sydney NSW, Australia.

Support and legal notices: support@withmestra.com
Privacy: privacy@withmestra.com
Security: security@withmestra.com