Last updated: September 6, 2026
By accessing and using Datadef ("the Service"), an AI-powered technical diagram generator, you accept and agree to be bound by the terms and provision of this agreement. These terms apply to all users of the Service, including anonymous visitors, account holders, and team subscribers.
Datadef is an AI-powered technical diagram generator that allows users to create data architecture, system design, cloud infrastructure, and data flow diagrams. The Service includes:
There is no individual subscription and no trial period. Every feature of the Service listed above is included on every account, for as long as the account exists. Only AI generation is metered, and it is metered in credits.
Payments are processed securely through our payment provider Polar.sh, which uses Stripe for payment processing. Buying credits is a single payment that authorizes a single charge. It does not create a subscription, does not renew, and cannot lapse. Credits are added to the account that bought them, are not transferable between accounts, and are not redeemable for cash. New accounts receive a one-time grant of credits, given once per email address.
The team workspace is a monthly subscription. By subscribing, you agree to pay the applicable fees and authorize us to charge your payment method until you cancel. It renews automatically unless cancelled before the renewal date. Its shared credit allowance is restored at each renewal and does not carry over to the next billing period. You may cancel at any time and the workspace remains available until the end of the billing period already paid for. No refunds are provided for partial billing periods.
Where we refund a credit purchase, whether at our discretion or because applicable consumer law requires it, we may remove the credits delivered by that purchase from the account balance. A refund may be reduced or declined to the extent that those credits have already been spent, since the AI generation they paid for has already been performed. Credits are attached to the account and are lost if the account is deleted or terminated. Cancelling a team subscription, or ending it for any other reason, does not withdraw credits bought separately, which stay on the balance of the account that bought them.
Credits are spent only when the Service runs an AI model on your behalf: generating a diagram, running a detailed generation, applying an AI edit, importing a file into a diagram, and running a repository sync that finds new commits and regenerates the diagram. A repository sync that finds nothing new costs nothing. The number of credits each of these costs is shown on the credits page in your account, and we may change it if the underlying model costs change materially.
An empty credit balance pauses AI generation and nothing else. Your projects, version history, share links, embeds, exports, repository connections, folders, and MCP access continue to work with a balance of zero, and content you have already created stays available and editable. Members of a team workspace draw on the workspace allowance before their own credits.
The free anonymous Scratch Canvas allows a limited number of AI generations per day and requires no account. We reserve the right to apply rate limits and fair use policies to prevent abuse of AI services, including automated or high-volume use that is not consistent with normal use of the Service.
To use Datadef, you must create an account using email/password or OAuth authentication (Google or GitHub). You are responsible for:
You may not use the Service for any illegal or unauthorized purpose, including but not limited to violating intellectual property rights, distributing malware, or attempting to gain unauthorized access to our systems.
You retain all rights to the diagrams and content you create using Datadef. By using the Service, you grant us a limited license to host, store, and display your content solely for the purpose of providing the Service to you.
The Datadef platform, including its design, features, code, and AI models, is protected by copyright, trademark, and other intellectual property laws. You may not copy, modify, distribute, or reverse engineer any part of the Service without our express written permission.
We store your diagrams, projects, and related data on secure servers. While we implement industry-standard security measures, you acknowledge that no system is completely secure. You are responsible for maintaining backups of any critical data.
We reserve the right to modify, suspend, or discontinue any part of the Service at any time, with or without notice. We may also terminate or suspend your account for violation of these terms or for any other reason at our discretion.
Upon termination, your right to use the Service will immediately cease. We may delete your account data, though we will provide reasonable notice when possible.
THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. We do not warrant that the Service will be uninterrupted, error-free, or free of viruses or other harmful components.
TO THE MAXIMUM EXTENT PERMITTED BY LAW, DATADEF AND ITS AFFILIATES SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS OR REVENUES, WHETHER INCURRED DIRECTLY OR INDIRECTLY, OR ANY LOSS OF DATA, USE, GOODWILL, OR OTHER INTANGIBLE LOSSES RESULTING FROM YOUR USE OF THE SERVICE.
We may revise these Terms of Service at any time by updating this page. Continued use of the Service after changes constitutes acceptance of the modified terms. We will notify users of material changes via email or through the Service.
If you have any questions about these Terms of Service, please contact us at [email protected].