Last Updated: Feb 17, 2026
Massient, Inc.
A Delaware corporation
8 The Green, Suite B, Dover, DE 19901, USA
(“Licensor”)
Subject to the terms of this Agreement and payment of applicable fees, Massient grants Licensee a non-exclusive, non-transferable, non-sublicensable license to use MassTransit (the “Software”) during the subscription term.
Massient offers two commercial license scopes:
A Single-Product Line license permits use of the Software within a single product line. A product line is defined as a cohesive product or system, consisting of one or more related services or applications, that are developed, versioned, and delivered together as a single offering. Multiple deployments of the same product line, including customer-specific, on-premises, or isolated installations, are covered by a Single-Product Line license.
An Organization-Wide license permits use of the Software across all product lines, systems, and internal applications operated by the Licensee and its Affiliates.
For purposes of this Agreement, “Affiliate” means any entity directly or indirectly controlling, controlled by, or under common control with the Licensee, where control means more than fifty percent (50%) ownership of the voting interests.
The applicable license scope is determined by the subscription purchased by the Licensee and reflected on the corresponding order, invoice, or subscription record. The license is either product-scoped or organization-scoped and is not based on message volume, endpoints, deployments, or number of services.
If contractors or agencies build and deploy applications incorporating the Software for their client under their own license, that use is permitted so long as the contractor maintains the software for the client. If the client assumes ownership or maintenance of the application, the client must purchase their own license appropriate for their organization.
MassTransit v8 and earlier remain free and open source under their original licenses. However, they are unsupported under this Agreement. This Agreement applies only to MassTransit v9 and later.
Licensee may not:
Support and maintenance services, if included with the subscription, are provided in accordance with Massient’s then-current support policies published at the Massient website.
Licensor retains all rights, titles, and interest in and to the Software, including all related intellectual property rights.
The Software is provided “as is” without a warranty of any kind, express or implied.
Customer must notify Massient of any service deficiencies within thirty (30) days from performance of the defective services. MASSIENT DOES NOT GUARANTEE THAT THE SOFTWARE WILL PERFORM ERROR-FREE OR UNINTERRUPTED, OR THAT MASSIENT WILL CORRECT ALL SOFTWARE ERRORS.
FOR ANY BREACH OF THE ABOVE WARRANTIES, CUSTOMER’S EXCLUSIVE REMEDY AND MASSIENT’S ENTIRE LIABILITY SHALL BE: (A) THE CORRECTION OF SOFTWARE ERRORS THAT CAUSE BREACH OF THE WARRANTY; OR, IF MASSIENT CANNOT SUBSTANTIALLY CORRECT SUCH BREACH IN A COMMERCIALLY REASONABLE MANNER, CUSTOMER MAY END THE SUBSCRIPTION TERM AND RECOVER A PRORATED PORTION OF ANY LICENSE FEES PREPAID TO MASSIENT; OR (B) THE REPERFORMANCE OF THE DEFICIENT SUPPORT SERVICES. TO THE EXTENT PERMITTED BY LAW, THESE WARRANTIES ARE EXCLUSIVE AND THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES OR CONDITIONS INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Licensor may terminate this Agreement if Licensee materially breaches it and fails to cure within thirty (30) days of notice. Upon termination, Licensee must cease using versions of the Software released after the Last Licensed Version, but may continue to use the Last Licensed Version perpetually under Section 4.
Language. This Agreement has been agreed to only in the English language. This English language version will control regardless of whether any translations of this Agreement have been prepared or exchanged. Customer acknowledges and represents that it has carefully reviewed this Agreement with the involvement and assistance of your employees, advisors, and/ or legal counsel fluent in the English language, that it has consulted with local legal counsel and counsel competent to render advice with respect to transactions governed by the law applicable to this Agreement, that it has no questions regarding the meaning or effect of any of this Agreement’s terms, and that it has obtained high-quality translations of this Agreement for use by Customer or any of Customer’s team who are not fluent in the English language, with the understanding that Customer alone will bear the risk of any misunderstandings that may arise as a result of such translation. All communications in connection with this Agreement will be in the English language.
Notices to Massient. Any notices to Massient under this Agreement must be in writing and sent by email to support@massient.com. Notices will be considered to have been given at the time of email receipt.
Choice of law; Jurisdiction; Jury Waiver. This agreement shall be governed by and construed and enforced in accordance with the laws of the State of Delaware without regard to its choice of law, and all applicable laws, regulations, treaties, or ordinances of the U.S. This agreement shall be interpreted in accordance with the commonly understood meaning of the words and phrases in the U.S. All judicial proceedings regarding any dispute and/ or controversy relating to Maintenance shall be initiated in the State or Federal courts sitting in Delaware, and each party irrevocably submits to the jurisdiction and venue of any such court in any such proceeding. BOTH PARTIES WAIVE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT.
Attorneys’ Fees. In the event of any legal action, arbitration, or proceeding brought by either party against the other arising out of this agreement, the prevailing party shall be entitled to pay reasonable attorney’s fees and costs incurred in such action and such an amount shall be included in any judgment or arbitration decision rendered in such proceeding.
Severability. If any of the parties’ obligations under this agreement are found by a court of competent jurisdiction to be illegal or unenforceable in any respect, such illegality or unenforceability will be interpreted to achieve the goals of such provision to the greatest extent possible under applicable law but shall not affect the other provisions of this agreement, all of which shall remain enforceable in accordance with their terms.
No waiver. The parties shall not be deemed to waive any of their rights or remedies under this agreement unless such waiver is in writing and signed by the party to be bound. No delay or omission on the part of either party in exercising any right or remedy under this agreement will be construed to be a waiver thereof. A waiver of any right or remedy on any one occasion shall not be construed as a bar to or waiver of such right or remedy or any other right or remedy on any future occasion.
Data Protection. Customer acknowledges that correspondence and log files generated in conjunction with a request for Support Services may contain sensitive, confidential, or personal information. Customer is solely responsible for taking the steps it considers necessary to protect the data, including obfuscating the logs or otherwise guarding the information before sending it to Massient.
Force Majeure. In no event shall a party be liable to the other party for any delay or failure to perform its obligations under this agreement (other than a failure to pay amounts owed), which delay or failure to perform is attributable to an event of force majeure or other causes beyond the control of such party and without the fault or negligence of the party claiming excusable delay.
Construction. The section titles of this Agreement are for convenience of reference only and are not to be considered in construing this Agreement. Unless the context of this Agreement clearly requires otherwise: (a) references to the plural include the singular and the singular the plural; (b) “or” has the inclusive meaning frequently identified with the phrase “and/or”; and (c) “including” has the inclusive meaning frequently identified with the phrase “including but not limited to” or “including without limitation.” Any reference in this Agreement to any statute, rule, regulation, or agreement, including this Agreement, will be deemed to include such a statute, rule, regulation, or agreement as it may be modified, varied, amended, or supplemented from time to time.
Modifications to the Agreement. Massient may update this Agreement (including any Support Services) from time to time by posting a revised version on the Massient website. Any material changes will apply only to: (a) new subscriptions or (b) renewals of existing subscriptions after the effective date of the updated terms. The terms in effect at the start of a paid subscription term will remain in effect for that term.
Entire Agreement; Order Documents. This Agreement constitutes the complete and exclusive statement of the agreement between the parties regarding the Software and supersedes all prior or contemporaneous agreements, proposals, or communications relating to its subject matter. Any terms or conditions contained in a purchase order, vendor onboarding portal, or other ordering document that conflict with or are additional to this Agreement are void and of no effect, and the Software is provided solely under the terms of this Agreement. For clarity, purchase orders or similar documents may be used for administrative or billing purposes only and will not modify this Agreement. This Agreement may be updated by Massient in accordance with Section 12.10. No other amendment or modification to this Agreement will be binding unless expressly agreed to in writing by Massient.