License terms

Effective date: July 21, 2026

Windmill self-hosted license terms

These terms apply to any of our Self-hosted plans, including Self-hosted Enterprise.

By signing up for Windmill Self-hosted License, you and any entity that you represent ("Customer") are unconditionally consenting to be bound by and are becoming a party to these Windmill Subscription Terms ("Agreement") as of the date of Customer's first download of the licensed materials (the "effective date"). Customer's continued use of the software or any licensed materials provided by Windmill Labs, Inc., trading as Windmill ("Windmill") (or one of its affiliates and/or subsidiaries, as specified on an order form or quote), shall also constitute assent to the terms of this agreement. If these terms are considered an offer, acceptance is expressly limited to these terms. If you are executing this agreement on behalf of an organization, you represent that you have authority to do so.

1. License and support

1.1 Subject to the terms and conditions of this Agreement, Windmill hereby grants to Customer and its Affiliates (as defined below) a limited, non-exclusive, non-transferable, non-sublicensable license for Customer’s and its Affiliates’ employees and contractors to (1) internally (a) use, reproduce, modify, prepare derivative works based upon, and display the code of Windmill Self-hosted edition at the tier level selected by Customer (or set forth on an Order Form or Quote (as defined below), if applicable with the specifications generally promulgated by Windmill from time to time (the “Software”), excluding Options for the Self-hosted edition unless listed on the Order Form or Quote, solely (i) for its internal use in connection with the development of Customer’s and/or its Affiliates’ own software, and (ii) for the level of event volumes for which Customer has paid Windmill; and (b) use the documentation, training materials or other materials supplied by Windmill (the “Other Windmill Materials”); and (2) modify the Software and publish patches to the Software, solely for the level of event volumes for which Customer has paid Windmill. Notwithstanding anything to the contrary, Customer agrees that Windmill and/or its licensors (as applicable) retain all right, title and interest in and to all Software incorporated in such modifications and/or patches, and all such Software may only be used, copied, modified, displayed, distributed, or otherwise exploited in full compliance with this Agreement, and with a valid Windmill Self-hosted edition subscription for the correct number of seats. The Software and Other Windmill Materials are collectively referred to herein as the “Licensed Materials.” “Affiliate” means any entity(ies) controlling, controlled by, and/or under common control with a party hereto, where “control” means the ownership of more than 50% of the voting securities in such entity. “User” means each individual end-user (person or machine) of Customer and/or its Affiliates (including, without limitation, employees, agents or consultants thereof) with access to the Licensed Materials hereunder.

1.2 Subject to the terms hereof, Windmill will provide reasonable support to Customer for the Licensed Materials as set forth on the 'Features' page, for the support plan selected and paid for by Customer. Notwithstanding anything to the contrary, in the event that Customer does not reasonably comply with written specifications or instructions from Windmill’s service engineers regarding any support issue or request (including without limitation, failure to make backups of Customer’s Licensed Materials) (each, a “Support Issue”), Windmill may terminate its support obligations to Customer with respect to such Support Issue upon fifteen (15) days’ written notice if Customer does not cure such noncompliance within the notice period.

1.2.1 Windmill will use reasonable commercial efforts to respond to support questions by Discord, email within two business days. The number of support questions is not limited.

2. Restrictions and responsibilities

2.1 Except as expressly authorized in Section 1.1, Customer will not, and will not permit any third party to: use the Licensed Materials for any purpose other than as specifically authorized in Section 1, or in such a manner that would enable any unlicensed person to access the Licensed Materials; use the Licensed Materials or any other Windmill software for timesharing or service bureau purposes or for any purpose other than its and its Affiliates’ own internal use (including without limitation, sublicensing, distributing, selling, reselling any of the foregoing); except as expressly permitted herein; use the Licensed Materials in connection with any high risk or strict liability activity (including, without limitation, space travel, firefighting, police operations, power plant operation, military operations, rescue operations, hospital and medical operations or the like); use the Licensed Materials or software other than in accordance with this Agreement and in compliance with all applicable laws and regulations (including but not limited to any privacy laws, and laws and regulations concerning intellectual property, consumer and child protection, obscenity or defamation); or use the Licensed Materials in any manner that (1) is harmful, fraudulent, deceptive, threatening, abusive, harassing, tortious, defamatory, vulgar, obscene, or libelous (including without limitation, accessing any computer, computer system, network, software, or data without authorization, breaching the security of another user or system, and/or attempting to circumvent any User authentication or security process), (2) impersonates any person or entity, including without limitation any employee or representative of Windmill, or (3) contains a virus, trojan horse, worm, time bomb, unsolicited bulk, commercial, or “spam” message, or other harmful computer code, file, or program (including without limitation, password guessing programs, decoders, password gatherers, keystroke loggers, cracking tools, packet sniffers, and/or encryption circumvention programs).

2.2 Customer will cooperate with Windmill in connection with the performance of this Agreement by making available such personnel and information as may be reasonably required, and taking such other actions as Windmill may reasonably request. Customer will also cooperate with Windmill in establishing a password or other procedures for verifying that only designated employees of Customer have access to any administrative functions of the Licensed Materials. Customer shall maintain during the term of this Agreement and through the end of the third year after the date on which the final payment is made under this Agreement, books, records, contracts and accounts relating to the payments due Windmill under this Agreement (collectively, the “Customer Records”). Windmill may, at its sole expense, upon 30 days’ prior written notice to Customer and during Customer’s normal business hours and subject to industry-standard confidentiality obligations, hire an independent third party auditor to audit the Customer Records only to verify the amounts payable under this Agreement. If an audit reveals underpayment, then Customer shall promptly pay the deficiency to Windmill plus late fees pursuant to Section 5.2. Windmill shall bear the cost of an audit unless the audit reveals underpayment by more than 5% for the audited period, in which case Customer shall promptly pay Windmill for the reasonable costs of the audit.

2.3 Customer will be responsible for maintaining the security of Customer’s account, passwords (including but not limited to administrative and User passwords) and files, and for all uses of Customer account with or without Customer’s knowledge or consent.

2.4 Customer will not air gap their Windmill Self-hosted instance without prior permission from Windmill, as this prevents us from being able to bill you correctly based on usage.

3. Confidentiality

3.1 Each party (the “Receiving Party”) understands that the other party (the “Disclosing Party”) has disclosed or may disclose information relating to the Disclosing Party’s technology or business (hereinafter referred to as “Proprietary Information” of the Disclosing Party). Without limiting the foregoing, the Licensed Materials are Windmill Proprietary Information.

3.2 The Receiving Party agrees: (i) not to divulge to any third person any such Proprietary Information, (ii) to give access to such Proprietary Information solely to those employees with a need to have access thereto for purposes of this Agreement, and (iii) to take the same security precautions to protect against disclosure or unauthorized use of such Proprietary Information that the party takes with its own proprietary information, but in no event will a party apply less than reasonable precautions to protect such Proprietary Information. The Disclosing Party agrees that the foregoing will not apply with respect to any information that the Receiving Party can document (a) is or becomes generally available to the public without any action by, or involvement of, the Receiving Party, or (b) was in its possession or known by it prior to receipt from the Disclosing Party, or (c) was rightfully disclosed to it without restriction by a third party, or (d) was independently developed without use of any Proprietary Information of the Disclosing Party. Nothing in this Agreement will prevent the Receiving Party from disclosing Proprietary Information pursuant to any judicial or governmental order, provided that the Receiving Party gives the Disclosing Party reasonable prior notice of such disclosure to contest such order. In any event, Windmill may collect data with respect to and report on the aggregate response rate and other aggregate measures of the Licensed Materials’ performance and Customer’s usage of the Licensed Materials; provided that Windmill will not identify Customer as the source of any such data without Customer’s prior written consent. For the avoidance of doubt, use of a third party to host the data collected shall not be deemed a disclosure.

3.3 Each party acknowledges and agrees that the other may suffer irreparable damage in the event of a breach of the terms of Sections 1.1, 2.1 or 3.2 of this Agreement and that such party will be entitled to seek injunctive relief (without the necessity of posting a bond) in the event of any such breach.

3.4 Both parties will have the right to disclose the existence of the relationship between the parties, but not the commercial terms of this Agreement, unless such disclosure of the Agreement terms is approved in writing by both Parties prior to such disclosure, or is included in a filing required to be made by a party with a governmental authority (provided such party will use reasonable efforts to obtain confidential treatment or a protective order) or is made on a confidential basis as reasonably necessary to potential investors or acquirers.

3.5 Telemetry Data. For self-hosted installations, Company collects only lightweight telemetry data including: base URL, worker and seat usage metrics, number and duration of jobs, login type usage, vCPUs and memory usage, and superadmin email address. This data is used solely for billing accuracy and service improvement purposes.

4. Intellectual property rights

4.1 Except as expressly set forth herein, Windmill alone (and its licensors, where applicable) will retain all intellectual property rights relating to the Licensed Materials and any suggestions, ideas, enhancement requests, feedback, code, or other recommendations provided by Customer, its Affiliates or any third party relating to the Licensed Materials, which are hereby assigned to Windmill. This Agreement is not a sale and does not convey to Customer any rights of ownership in or related to the Licensed Materials, or any intellectual property rights.

4.2 Customer shall not remove, alter or obscure any of Windmill’s (or its licensors’) copyright notices, proprietary legends, trademark or service mark attributions, patent markings or other indicia of Windmill’s (or its licensors’) ownership or contribution from the Licensed Materials. Additionally, Customer agrees to reproduce and include Windmill’s (and its licensors’) proprietary and copyright notices on any copies of the Licensed Materials, or on any portion thereof, including reproduction of the copyright notice. Notwithstanding anything to the contrary herein, certain components of the Licensed Materials, including without limitation, any component of the Licensed Materials distributed by Windmill as part of the Windmill Community Edition, are licensed by third parties pursuant to the terms of certain third party licenses described in such source code annotations.

4.3 Customer and its licensors shall (and Customer hereby represents and warrants that they do) have and retain all right, title and interest (including, without limitation, sole ownership of) all software, information, content and data provided by or on behalf of Customer or made available or otherwise distributed through use of the Licensed Materials (“Content”) and the intellectual property rights with respect to that Content. If Windmill receives any notice or claim that any Content, or Customer’s activities hereunder (including without limitation, with respect to any Content), infringes or violates the rights of a third party or any applicable law or regulation (a “Claim”), Customer will indemnify, defend and hold Windmill harmless from all liability, damages, settlements, attorney fees and other costs and expenses in connection with any such Claim, as incurred. The immediately foregoing indemnity obligations are expressly conditioned on Windmill providing Customer with prompt notice of, and reasonable cooperation and sole control over the defense and/or settlement of the applicable Claim. Subject to the foregoing, Windmill may participate in the defense and/or settlement of any applicable Claim with counsel of its choosing at its own expense.

4.4 Windmill will defend, indemnify and hold Customer harmless from liability and other amounts paid or payable to unaffiliated third parties resulting from the infringement or violation of any intellectual property or proprietary rights by the Licensed Materials, provided Windmill is promptly notified of any and all threats, claims and proceedings related thereto and given reasonable assistance and the opportunity to assume sole control over defense and settlement thereof. Subject to the foregoing, Customer may participate in the defense and/or settlement of any claim that is indemnifiable by Windmill with counsel of its choosing at its own expense. The foregoing obligations do not apply with respect to portions or components of the Licensed Materials (i) not created by Windmill, (ii) that are modified after delivery by Windmill, (iii) combined with other products, processes or materials where the alleged infringement relates to such combination, (iv) where Customer continues allegedly infringing activity after being notified thereof or after being informed of modifications that would have avoided the alleged infringement, or (v) where Customer’s use of the Licensed Materials is not strictly in accordance with this Agreement and all related documentation.

5. Payment of fees

5.1 Customer will pay Windmill the then applicable fees described in the Order Form or Quote for the Licensed Materials in accordance with the terms therein (the “Fees”). If Customer’s use of the Licensed Materials exceeds the Service Capacity set forth on the Order Form or Quote or otherwise requires the payment of additional fees (per the terms of this Agreement), Customer shall be billed for such usage and Customer agrees to pay the additional fees in the manner provided herein. Windmill reserves the right to change the Fees or applicable charges and to institute new charges and Fees at the end of the Initial Service Term or then current renewal term, upon thirty (30) days prior notice to Customer (which may be sent by email). If Customer believes that Windmill has billed Customer incorrectly, Customer must contact Windmill no later than 60 days after the closing date on the first billing statement in which the error or problem appeared, in order to receive an adjustment or credit. Inquiries should be directed to Company’s customer support department ([email protected]).

5.2 Company may choose to bill through an invoice, in which case, full payment for invoices issued in any given month must be received by Company within thirty (30) days after the receipt date of invoice, unless another payment period is expressly specified on the applicable invoice, in which case such period will apply. Unpaid amounts are subject to a finance charge of 1.5% per month on any outstanding balance, or the maximum permitted by law, whichever is lower, plus all expenses of collection and may result in immediate termination of Service.

5.2.1 Invoices are delivered by email only. Windmill sends each invoice as an electronic document to the billing contact email address provided by Customer, and email is the sole method of invoice delivery. Customer is responsible for keeping a valid billing contact email address on file and for ensuring any internal processing required on its side is completed within the payment period set out in Section 5.2.

5.3 Our fees do not include any taxes, levies, duties or similar governmental assessments of any nature, including, for example, value-added, sales, GST, use or withholding taxes, assessable by any jurisdiction whatsoever in relation to your purchases under this Agreement (collectively, the “Taxes”). You are solely responsible for paying all Taxes associated with your purchases hereunder. If we have a legal obligation to pay or collect Taxes for which you are responsible for under this Clause 4.3, we shall invoice you and you shall pay that amount to us unless you provide us with a valid tax exemption certificate authorised by the appropriate taxing authority. We shall calculate applicable Taxes based on your billing address as detailed on the relevant Order Form or Quote (it is your duty to inform us if Taxes should be assessed on a different address). You shall promptly notify us of any changes to any of your addresses specified in a Order Form or Quote. Taxes shall not be deducted from or set-off against the fees in the applicable Order Form or Quote.

5.4 Subject to earlier termination as provided below, this Agreement is for the Initial Service Term as specified in the Order Form or Quote, and shall be automatically renewed for additional successive one-year terms unless either Party notifies the other in writing at least (30) days before the end of the Term.

6. Termination

6.1 This Agreement shall continue until terminated in accordance with this Section 6. Either party may terminate this Agreement upon thirty (30) days' written notice to the other party hereto in the event that Customer has no then-current subscription with respect to the Licensed Materials.

6.2 Termination for Cause. Either party may terminate this Agreement immediately upon thirty (30) days' written notice to the other party in the event of any material breach of this Agreement (including without limitation, any breach of Section 2.2 and/or failure to pay any amounts when due hereunder) by such party where such material breach is not cured during such notice period.

6.3 Termination for Insolvency. Either party may terminate this Agreement, without notice, (i) upon the institution by or against the other party of insolvency, receivership or bankruptcy proceedings (provided such proceedings are not dismissed within one hundred twenty (120) days of such institution), (ii) upon the other party's making an assignment for the benefit of creditors, or (iii) upon the other party's dissolution or ceasing to do business without a successor.

6.4 Effect of Termination. (a) License Termination. Customer's rights to the Licensed Materials, and any licenses granted hereunder, shall terminate immediately upon any termination of this Agreement. (b) Payment Obligations. Upon termination of this Agreement for any reason:

• All unpaid fees for Services provided through the effective date of termination shall become immediately due and payable;
• If Customer has subscribed to Licensed Materials for a defined Service Term (as specified in the applicable Order Form or Quote), Customer shall remain obligated to pay all fees for the remainder of such Service Term, regardless of whether Customer continues to use the Licensed Materials; and
• No refunds will be provided for any pre-paid fees, except as specifically set forth in subsection (c) below. For clarity, any termination initiated by Customer (including for convenience) will not relieve Customer of its obligation to pay all committed fees for the applicable Service Term, and Customer will not be entitled to any refund of pre-paid amounts, except as set forth in subsection (c). (c) Refund for Company Breach Only. If and only if Customer terminates this Agreement pursuant to Section 6.2 above due to Windmill's uncured material breach of this Agreement, Windmill will refund to Customer a pro-rated portion of pre-paid Fees for Services not actually received by Customer as of the date of such termination. For clarity, no refund shall be provided if: (i) Customer terminates for any reason other than Windmill's uncured material breach; (ii) Customer terminates pursuant to Section 6.1 or 6.3; or (iii) Windmill terminates this Agreement for Customer's breach. (d) Survival. The following Sections will survive any termination of this Agreement: 2 through 6 (except for Section 4.3), and 8 through 11.

7. Warranty; Customer software security

Windmill represents and warrants that (i) it has all rights and licenses necessary for it to perform its obligations hereunder, and (ii) it will not knowingly include, in any Windmill software released to the public and provided to Customer hereunder, any computer code or other computer instructions, devices or techniques, including without limitation those known as disabling devices, trojans, or time bombs, that are intentionally designed to disrupt, disable, harm, infect, defraud, damage, or otherwise impede in any manner, the operation of a network, computer program or computer system or any component thereof, including its security or user data. If, at any time, Windmill fails to comply with the warranty in this Section, Customer may promptly notify Windmill in writing of any such noncompliance. Windmill will, within thirty (30) days of receipt of such written notification, either correct the noncompliance or provide Customer with a plan for correcting the noncompliance. If the noncompliance is not corrected or if a reasonably acceptable plan for correcting them is not established during such period, Customer may terminate this Agreement as its sole and exclusive remedy for such noncompliance.

8. Warranty disclaimer

Except as expressly stated herein, the licensed materials, software and Windmill proprietary information and anything provided in connection with this agreement are provided “as is,” without any warranties of any kind. Windmill and its licensors hereby disclaim all warranties, express or implied, including, without limitation, all implied warranties of merchantability, fitness for a particular purpose, title, and non-infringement.

9. Limitation of liability

Except with respect to breach(es) of section 1.1 and/or 2.1, in no event will either party or their licensors be liable for any indirect, punitive, incidental, special, or consequential damages arising out of or in any way connected with the use of the licensed materials or anything provided in connection with this agreement, any delay or inability to use the licensed materials or anything provided in connection with this agreement or otherwise arising from this agreement, including without limitation, loss of revenue or anticipated profits or lost business or lost sales, whether based in contract, tort (including negligence), strict liability, or otherwise, even if such party has been advised of the possibility of damages. Except with respect to breach(es) of section 1.1 and/or 2.1, the total liability of each party and its licensors, whether based in contract, tort (including negligence or strict liability), or otherwise, will not exceed, in the aggregate, the greater of (i) one thousand dollars ($1,000), or (ii) the fees paid to Windmill hereunder in the one year period ending on the date that a claim or demand is first asserted. The foregoing limitations will apply notwithstanding any failure of essential purpose of any limited remedy.

10. U.S. Government matters

Notwithstanding anything else, Customer may not provide to any person or export or re-export or allow the export or re-export of the Licensed Materials or any software or anything related thereto or any direct product thereof (collectively “Controlled Subject Matter”), in violation of any restrictions, laws or regulations of the United States Department of Commerce, the United States Department of Treasury Office of Foreign Assets Control, or any other United States or foreign agency or authority. Without limiting the foregoing Customer acknowledges and agrees that the Controlled Subject Matter will not be used or transferred or otherwise exported or re-exported to countries as to which the United States maintains an embargo (collectively, “Embargoed Countries”), or to or by a national or resident thereof, or any person or entity on the U.S. Department of Treasury’s List of Specially Designated Nationals or the U.S. Department of Commerce’s Table of Denial Orders (collectively, “Designated Nationals”). The lists of Embargoed Countries and Designated Nationals are subject to change without notice. Use of the Licensed Materials is representation and warranty that the User is not located in, under the control of, or a national or resident of an Embargoed Country or Designated National. The Controlled Subject Matter may use or include encryption technology that is subject to licensing requirements under the U.S. Export Administration Regulations. As defined in FAR section 2.101, any software and documentation provided by Windmill are “commercial items” and according to DFAR section 252.2277014(a)(1) and (5) are deemed to be “commercial computer software” and “commercial computer software documentation.” Consistent with DFAR section 227.7202 and FAR section 12.212, any use modification, reproduction, release, performance, display, or disclosure of such commercial software or commercial software documentation by the U.S. Government will be governed solely by the terms of this Agreement and will be prohibited except to the extent expressly permitted by the terms of this Agreement.

11. Miscellaneous

If any provision of this Agreement is found to be unenforceable or invalid, that provision will be limited or eliminated to the minimum extent necessary so that this Agreement will otherwise remain in full force and effect and enforceable. This Agreement is not assignable, transferable or sublicensable by either party without the other party’s prior written consent, not to be unreasonably withheld or delayed; provided that either party may transfer and/or assign this Agreement to a successor in the event of a sale of all or substantially all of its business or assets to which this Agreement relates. Both parties agree that this Agreement is the complete and exclusive statement of the mutual understanding of the parties and supersedes and cancels all previous written and oral agreements, communications and other understandings relating to the subject matter of this Agreement, and that all waivers and modifications must be in a writing signed or otherwise agreed to by each party, except as otherwise provided herein. No agency, partnership, joint venture, or employment is created as a result of this Agreement and neither party has any authority of any kind to bind the other in any respect whatsoever. In any action or proceeding to enforce rights under this Agreement, the prevailing party will be entitled to recover costs and attorneys’ fees. All notices under this Agreement will be in writing and will be deemed to have been duly given when received, if personally delivered; when receipt is electronically confirmed, if transmitted by facsimile or e-mail; and upon receipt, if sent by certified or registered mail (return receipt requested), postage prepaid. Windmill will not be liable for any loss resulting from a cause over which it does not have direct control. This Agreement will be governed by the laws of the State of California, U.S.A. without regard to its conflict of laws provisions. The federal and state courts sitting in San Francisco County, California, U.S.A. will have proper and exclusive jurisdiction and venue with respect to any disputes arising from or related to the subject matter of this Agreement.

12. Data privacy

Where we process any customer personal data in connection with this Agreement, we can enter into a separate GDPR Data Processing Agreement upon request, the exact terms of which will vary depending on the nature of the installation, how personal data is being processed, and where it is stored. Our standard form agreement can be viewed here. For Cloud Team plan, check Data Processing Addendum here.