Terms of Service

These terms are an agreement between you and Comprestack (“we”, “us”), the company behind Comprestack, based in Belfast, United Kingdom. They apply whenever you use our website at https://www.comprestack.com, our dashboard, or our API (together, the “service”).

By using the service you agree to these terms and to our Privacy Policy. If you use Comprestack for a company, you confirm you're allowed to accept these terms on its behalf.

Comprestack compresses images to make them smaller and converts images between formats. You can use it:

• In the dashboard, without an account, for a limited number of guest jobs each day.
• With a free or paid account, including batches of up to 10 images on paid plans.
• Through the REST API, for automated or higher-volume jobs.

We keep improving the service, so features may change. If we remove something important you pay for, we'll tell you in advance.

You need to be at least 16 years old to create an account. You can sign up with email and password. Please give accurate details and keep your login and API keys safe: you're responsible for what happens under your account.

One person, one free account. Creating extra accounts to get around the free limits isn't allowed. Tell us straight away at hello@comprestack.com if you think someone else has access to your account.

You can try the dashboard without signing up. Guest use is limited to protect the service for everyone — currently about 3 images per day and 5 MB per file, with a batch of one. Limits may change; the dashboard shows what applies when you upload.

We use essential cookies and other anti-abuse checks to enforce guest limits. Trying to reset those limits by clearing cookies or switching networks is not allowed.

Our current plans and prices are on the pricing page. Each plan includes a number of images per month, shared between the website and the API.

• Monthly allowance. Your allowance resets at the start of each billing period. Unused images don't roll over.
• Extra images. On Pro and Business, images beyond your allowance are charged at the rate shown on the pricing page and added to your next invoice (or as otherwise described at checkout).
• Image packs. Packs are one-time purchases. Pack images are used after your monthly allowance runs out and expire 12 months after purchase. Unused pack images are not refundable once they expire.
• Renewal. Subscriptions renew automatically, monthly or yearly, until you cancel. You can cancel anytime in your dashboard; your plan stays active until the end of the period you've paid for.
• Price changes. We'll give you at least 30 days' notice before a price change affects your subscription.
• Failed payments. If a payment fails and isn't fixed within 14 days, your account may move to the Free plan and paid features may pause.

Payments are processed by our payment partner, who acts as the merchant of record. Prices are shown in US dollars; taxes such as VAT may be added by our payment partner where required. Your checkout and invoices are provided by our payment partner.

If you're not happy, email us within 14 days of a charge and we'll refund it where we reasonably can. This covers your first subscription payment, yearly renewals, and image packs you haven't started using. We may decline refunds when an account has clearly been used heavily or has broken these terms. Refunds are processed through our payment partner.

Your images stay yours. You give us permission to store and process them only so we can compress or convert them for you. We don't claim any ownership, we don't use them to train AI models, and we don't share them.

Processed files are deleted automatically within 1 hour. Download links stop working after that. Please keep your originals: we're not a backup service, and once a file is deleted it can't be recovered.

By default we strip embedded metadata (such as GPS). You may opt to keep metadata when the product offers that option. You confirm you have the right to upload and process every image you send us.

To keep the service fast and safe for everyone, you agree not to:

• Upload illegal content, including any content that sexually exploits children. We report it to the authorities.
• Upload images that infringe someone else's copyright, trademark or privacy.
• Upload malware or files designed to harm our systems.
• Overload the service, get around rate limits, guest limits or plan limits, or test our security without written permission.
• Resell or repackage the service as your own without a written agreement with us.
• Copy, reverse-engineer or scrape the service.

API keys are like passwords: keep them secret and don't put them in public code. Every successful chargeable request counts towards your monthly images. If a file can't be made smaller and we return it unchanged, it isn't charged. We apply usage limits to protect the service and may change them over time.

We may revoke a key that's been leaked or is being used in a way that breaks these terms. When possible, we'll tell you first.

We work hard to keep Comprestack running, but we can't promise it will never be down. We sometimes need maintenance and will try to schedule it at quiet times. Live status is published on our status page. Higher uptime commitments, if any, are set out in a separate Business or enterprise agreement.

You can delete your account anytime in your dashboard settings. We may suspend or close an account that breaks these terms, puts other users at risk, or hasn't paid. Unless the problem is serious, we'll warn you first and give you a chance to fix it.

If we close your paid account without a good reason under these terms, we'll refund the unused part of your subscription where the law and our payment partner's processes allow.

The service is provided “as is”. How much smaller a file gets depends on the image itself, so we can't guarantee a particular result or that every file will shrink. To the extent the law allows, we don't give any warranties beyond what's written in these terms.

To the extent the law allows, we're not liable for indirect or consequential losses, such as lost profits or lost data. Our total liability for any claim is limited to the greater of what you paid us in the 12 months before the claim, or $50.

Nothing in these terms limits liability that can't be limited by law, or your rights as a consumer.

If someone makes a claim against us because of images you uploaded or because you broke these terms, you agree to cover the reasonable costs of that claim.

We may update these terms as the service changes. For important changes, we'll email account holders at least 30 days before they take effect where that's practical. If you keep using Comprestack after that, the new terms apply. The date at the top shows the latest version.

These terms are governed by the laws of Northern Ireland, United Kingdom, and any disputes will be handled by the courts of Northern Ireland, sitting in Belfast. If you live in another country, you still keep any consumer protections that the laws of your country give you, including the right to bring a claim where you live.

Questions about these terms? Email hello@comprestack.com. For help with your account, email hello@comprestack.com or use our contact form.