Contributor Licence Agreement

DVAI Bridge — v1.0, effective 15 May 2026.

Part A — DVAI Bridge Individual Contributor Licence Agreement v1.0

This agreement is between you (the "Contributor") and Deep Voice AI Limited, a company incorporated in England and Wales with registered number 16743132, having its registered office at 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ ("DVAI Limited", "we", or "us").

In order to clarify the intellectual property licence granted with Contributions from any person to DVAI Limited, we must have a Contributor Licence Agreement on file that has been agreed to by each Contributor, indicating agreement to the licence terms below. This agreement is for your protection as a Contributor as well as the protection of DVAI Limited; it does not change your rights to use your own Contributions for any other purpose.

By agreeing to this Contributor Licence Agreement (whether by checking a checkbox in the DVAI Bridge pull-request workflow, by signing this document, or by any other unambiguous means of agreement), you accept and agree to the following terms and conditions for your past, present, and future Contributions submitted to DVAI Limited.

1. Definitions

"You" (or "Your") shall mean the copyright owner or legal entity authorised by the copyright owner that is agreeing to this Agreement with DVAI Limited. For legal entities, the entity making a Contribution and all other entities that control, are controlled by, or are under common control with that entity are considered to be a single Contributor. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity.

"Contribution" shall mean any original work of authorship, including any modifications or additions to an existing work, that is intentionally submitted by You to DVAI Limited for inclusion in, or documentation of, any of the products owned or managed by DVAI Limited (the "Work", which for the avoidance of doubt includes DVAI Bridge in all its forms). For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to DVAI Limited or its representatives, including but not limited to communication on electronic mailing lists, source code control systems (including DVAI Bridge's GitHub repositories and any successor systems), and issue tracking systems that are managed by, or on behalf of, DVAI Limited for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by You as "Not a Contribution".

"DVAI Bridge Community Licence" shall mean the DVAI Bridge Community Licence v1.0 (DVAI-BCL v1.0), as published by DVAI Limited at https://bridge.deepvoiceai.co/licensing, including any future versions of that licence as published by DVAI Limited.

"DVAI Bridge Commercial Licence" shall mean any commercial licence offered by DVAI Limited to commercial customers under the terms set out from time to time by DVAI Limited, including but not limited to the standard commercial licence terms set out on the DVAI Bridge licensing page at https://bridge.deepvoiceai.co/licensing.

"Apache 2.0" shall mean the Apache License, Version 2.0, as published by the Apache Software Foundation and available at https://www.apache.org/licenses/LICENSE-2.0.

2. Grant of copyright licence

Subject to the terms and conditions of this Agreement, You hereby grant to DVAI Limited and to recipients of software distributed by DVAI Limited a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright licence to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Your Contributions and such derivative works.

The copyright licence granted in this Section 2 expressly permits DVAI Limited to distribute Your Contributions, as part of the Work, under each of the following licences:

1. the DVAI Bridge Community Licence in any version then in force;
2. any DVAI Bridge Commercial Licence;
3. the Apache 2.0 (including, without limitation, in the course of the automatic conversion of any version of the Work to Apache 2.0 under the Change Date mechanism of the DVAI Bridge Community Licence);
4. any other licence that DVAI Limited may from time to time elect to apply to the Work, provided that such licence does not impose any obligation on You beyond the licences granted to DVAI Limited in this Agreement.

You understand and agree that the dual-licensing of the Work under both the DVAI Bridge Community Licence and the DVAI Bridge Commercial Licence is a fundamental aspect of DVAI Limited's commercial model, and that Your grant of rights under this Section 2 is intended to support that model.

3. Grant of patent licence

Subject to the terms and conditions of this Agreement, You hereby grant to DVAI Limited and to recipients of software distributed by DVAI Limited a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this Section 3) patent licence to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such licence applies only to those patent claims licensable by You that are necessarily infringed by Your Contribution(s) alone or by combination of Your Contribution(s) with the Work to which such Contribution(s) was submitted.

If any entity institutes patent litigation against You or any other entity (including a cross-claim or counterclaim in a lawsuit) alleging that Your Contribution, or the Work to which You have contributed, constitutes direct or contributory patent infringement, then any patent licences granted to that entity under this Agreement for that Contribution or Work shall terminate as of the date such litigation is filed.

4. Representations and warranties

You represent and warrant that:

1. You have authority. You are legally entitled to grant the above licences. If Your employer(s) has rights to intellectual property that You create that includes Your Contributions, You represent that You have received permission to make Contributions on behalf of that employer, that Your employer has waived such rights for Your Contributions to DVAI Limited, or that Your employer has executed a separate Corporate Contributor Licence Agreement with DVAI Limited. If You are uncertain whether Your employer has rights, You should not sign this Agreement and should instead arrange for Your employer to sign the Corporate Contributor Licence Agreement.
2. Your work is your own. Each of Your Contributions is Your original creation. Representations and warranties made in this Section 4(b) are limited to the maximum extent permissible under applicable law. Without limiting the generality of the foregoing, You represent that to the best of Your knowledge, no other person owns the copyright in Your Contributions and no third party has any right, title, interest, claim, or encumbrance in or over Your Contributions.
3. Third-party content is disclosed. Should You wish to submit work that is not Your original creation, You may submit it to DVAI Limited separately from any Contribution, identifying the complete details of its source and of any licence or other restriction (including, but not limited to, related patents, trademarks, and licence agreements) of which You are personally aware, and conspicuously marking the work as "Submitted on behalf of a third party: [named here]".
4. No warranty otherwise given. You are not expected to provide support for Your Contributions, except to the extent You desire to provide support. You may provide support for free, for a fee, or not at all. Unless required by applicable law or agreed to in writing, You provide Your Contributions on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE.

5. Notice of changes affecting your Contributions

You agree to notify DVAI Limited of any facts or circumstances of which You become aware that would make the representations and warranties in Section 4 inaccurate in any respect.

6. Retention of copyright

This Agreement does not transfer copyright in Your Contributions; it grants DVAI Limited the licences set out in Sections 2 and 3. You retain copyright ownership in Your Contributions.

For the avoidance of doubt: You may continue to use, distribute, and license Your Contributions for any other purpose under any other licence. DVAI Limited's rights under this Agreement are non-exclusive.

7. Submission to other projects

If You wish to also submit Your Contribution to another project or for another purpose, You may do so under any terms You choose. This Agreement does not restrict Your ability to do so.

8. No obligation to use Contributions

DVAI Limited has no obligation to incorporate any Contribution into the Work, and may modify, reject, or remove any Contribution at any time and for any reason. DVAI Limited's decision not to use a Contribution does not affect Your rights or obligations under this Agreement in respect of any Contribution that DVAI Limited does use.

9. Governing law and jurisdiction

This Agreement is governed by and construed in accordance with the law of England and Wales. The courts of England and Wales have non-exclusive jurisdiction to settle any dispute arising out of or in connection with this Agreement.

10. Entire agreement

This Agreement, together with any future versions of this Agreement that You expressly accept, constitutes the entire agreement between You and DVAI Limited in respect of Contributions to DVAI Bridge. This Agreement does not affect any other agreement between You and DVAI Limited (for example, any DVAI Bridge Commercial Licence to which You may be party as a customer).

Signature (Individual CLA)

By submitting a Contribution to a DVAI Bridge repository, You agree that You have read and accept the terms of this Agreement and that You have authority to do so on Your own behalf.

For automated acceptance via the DVAI Bridge pull-request workflow, the CLA Assistant bot will present the following confirmations:

• I have read and agree to the DVAI Bridge Individual Contributor Licence Agreement v1.0.
• I confirm that I am contributing on my own behalf, and that no employer or other third party has rights to my Contribution.
• I confirm that the email address associated with my GitHub account is correct and that I can be contacted at that address regarding my Contributions.

Electronic acceptance via CLA Assistant constitutes signature.

Part B — DVAI Bridge Corporate Contributor Licence Agreement v1.0

This agreement is between you (the "Corporation") and Deep Voice AI Limited, a company incorporated in England and Wales with registered number 16743132, having its registered office at 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ ("DVAI Limited", "we", or "us").

This Corporate Contributor Licence Agreement applies in respect of Contributions to DVAI Bridge made by employees of the Corporation in the course of their employment, where the Corporation holds copyright in the resulting work product.

By executing this Agreement, the Corporation accepts and agrees, on behalf of itself and its Employees identified in the Schedule (below), to the following terms and conditions in respect of Contributions submitted to DVAI Limited by such Employees.

1. Definitions

"Corporation" shall mean the legal entity executing this Agreement.

"Employee" shall mean each individual identified in the Schedule to this Agreement, and each other individual designated by the Corporation in writing from time to time. The Corporation is responsible for maintaining an accurate list of its Employees who contribute to DVAI Bridge and for notifying DVAI Limited of additions to and removals from that list.

"Contribution", "Work", "DVAI Bridge Community Licence", "DVAI Bridge Commercial Licence", and "Apache 2.0" have the meanings given to them in the Individual Contributor Licence Agreement, save that "Contribution" in this Corporate CLA means a Contribution made by an Employee.

2. Grant of copyright licence

Subject to the terms and conditions of this Agreement, the Corporation hereby grants to DVAI Limited and to recipients of software distributed by DVAI Limited a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright licence to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Contributions made by Employees of the Corporation and such derivative works.

The copyright licence granted in this Section 2 expressly permits DVAI Limited to distribute such Contributions, as part of the Work, under each of the following licences:

1. the DVAI Bridge Community Licence in any version then in force;
2. any DVAI Bridge Commercial Licence;
3. the Apache 2.0;
4. any other licence that DVAI Limited may from time to time elect to apply to the Work, provided that such licence does not impose any obligation on the Corporation beyond the licences granted to DVAI Limited in this Agreement.

3. Grant of patent licence

Subject to the terms and conditions of this Agreement, the Corporation hereby grants to DVAI Limited and to recipients of software distributed by DVAI Limited a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this Section 3) patent licence to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such licence applies only to those patent claims licensable by the Corporation that are necessarily infringed by Contributions of Employees alone or by combination of such Contributions with the Work to which such Contributions were submitted.

If any entity (including the Corporation, an Employee, or any third party) institutes patent litigation against any Employee or any other entity (including a cross-claim or counterclaim in a lawsuit) alleging that a Contribution by an Employee, or the Work to which the Employee has contributed, constitutes direct or contributory patent infringement, then any patent licences granted under this Agreement for that Contribution or Work shall terminate as of the date such litigation is filed.

4. Representations and warranties

The Corporation represents and warrants that:

1. Authority. The Corporation has the legal authority to enter into this Agreement and to grant the licences set out in Sections 2 and 3 in respect of Contributions made by Employees identified in the Schedule.
2. Employee Contributions are work product. Contributions made by Employees of the Corporation, in the course of their employment, are work product of the Corporation, and the Corporation holds copyright in such Contributions and any patent rights necessarily infringed by such Contributions.
3. No third-party rights. To the best of the Corporation's knowledge, no third party has any right, title, interest, claim, or encumbrance in or over Contributions made by Employees of the Corporation, save where expressly identified by the Corporation in writing at the time of the Contribution.
4. Compliance with the Corporation's policies. The Corporation will procure that Employees comply with the Corporation's policies governing Contributions to open-source or source-available projects, including any review, approval, or disclosure requirements applicable to such Contributions.
5. No warranty otherwise given. Contributions of Employees are provided on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. The Corporation is not expected to provide support for Employees' Contributions.

5. Maintenance of the Schedule

The Corporation shall maintain an accurate list of Employees who contribute to DVAI Bridge in the Schedule to this Agreement. The Corporation may add Employees to the Schedule by written notice to DVAI Limited (which may include email to info@deepvoiceai.co). The Corporation may remove Employees from the Schedule by written notice to DVAI Limited, but the removal does not retroactively affect the licences granted in respect of Contributions made by the Employee while they were on the Schedule.

6. Retention of copyright

This Agreement does not transfer copyright in Contributions; it grants DVAI Limited the licences set out in Sections 2 and 3. The Corporation retains copyright ownership in the Contributions of its Employees.

7. No obligation to use Contributions

DVAI Limited has no obligation to incorporate any Contribution into the Work, and may modify, reject, or remove any Contribution at any time and for any reason.

8. Notice of changes affecting the Corporation's Contributions

The Corporation agrees to notify DVAI Limited of any facts or circumstances of which the Corporation becomes aware that would make the representations and warranties in Section 4 inaccurate in any respect.

9. Governing law and jurisdiction

This Agreement is governed by and construed in accordance with the law of England and Wales. The courts of England and Wales have non-exclusive jurisdiction to settle any dispute arising out of or in connection with this Agreement.

10. Entire agreement

This Agreement constitutes the entire agreement between the Corporation and DVAI Limited in respect of Contributions to DVAI Bridge by Employees of the Corporation. This Agreement does not affect any other agreement between the Corporation and DVAI Limited (for example, any DVAI Bridge Commercial Licence to which the Corporation may be party as a customer).

Signature (Corporate CLA)

The Corporate CLA must be executed in writing. Download a printable copy by saving this page, fill in the Schedule, then email a signed PDF to info@deepvoiceai.co.

Schedule — Employees authorised to contribute to DVAI Bridge on behalf of the Corporation

The Corporation may notify DVAI Limited of additions to or removals from this Schedule by email to info@deepvoiceai.co. Each addition or removal takes effect from the date of receipt by DVAI Limited.

Which CLA applies?

The Corporate CLA is required if any of the following apply to a contributor:

• The contributor is contributing in the course of their employment for a third-party company;
• The contributor's employment agreement assigns intellectual property in the contributor's work product to their employer;
• The contributor's employer has any policy that requires approval of open-source contributions made by employees;
• The contributor is uncertain whether their employer has rights — in which case the safe path is to use the Corporate CLA.

For contributors who are clearly contributing on their own behalf and have no employer claim on their work product (for example, students, freelancers contributing outside any client engagement, individual hobbyists), the Individual CLA is sufficient.

When in doubt, the Corporate CLA is the safer choice. The Corporate CLA does not preclude the Individual CLA also being signed; some contributors sign both for additional clarity.

Signing and operational process

Automated workflow via CLA Assistant

The DVAI Bridge GitHub repository is configured with CLA Assistant. When you open your first pull request:

1. The bot comments on the PR with a request that you sign the CLA before the PR can be merged.
2. For the Individual CLA, the bot links you to a one-click sign page where you confirm acceptance with your GitHub identity.
3. For the Corporate CLA, the bot links to this page and provides the email address (info@deepvoiceai.co) for sending an executed copy.
4. GitHub branch protection is configured so that pull requests cannot be merged until the CLA is signed.

The bot maintains the list of CLA signers as an audit trail; CLA Assistant stores this automatically with GitHub username, email, IP address, timestamp, and CLA version signed.

What happens if a contributor refuses to sign

If a contributor refuses to sign the CLA, their pull request cannot be merged. The DVAI team will respond with a brief, friendly explanation of why the CLA is required, an offer to discuss any specific concerns, and an offer to consider alternative arrangements (for example, the contributor's code being rewritten by a DVAI team member, with attribution to the original contributor's idea but no copying of their actual code). The CLA process is not negotiable; it is a structural requirement of the dual-licensing commercial model.

Renewal and updates

The CLA terms may be updated by DVAI from time to time. Substantive changes (changes to the scope of licence grants, the patent provisions, or the dual-licensing flexibility) require re-acceptance by existing signers. Minor clarifications and corrections do not require re-acceptance. Each new version of the CLA is given a version number (currently v1.0). This page maintains the canonical text; archived prior versions are available on request.

Records retention

DVAI maintains, as part of its permanent corporate records:

• The full CLA Assistant audit trail of all CLA signatures, including GitHub username, email, IP address, timestamp, and CLA version signed.
• All signed Corporate CLAs and their Schedules.
• The version history of the CLA text itself.

These records are retained for the lifetime of DVAI Bridge as a project and for not less than ten years after the last update to the CLA text.

This page is the canonical text of the DVAI Bridge Contributor Licence Agreement v1.0. The structure is modelled on the Apache Software Foundation Individual Contributor License Agreement and Corporate Contributor License Agreement, with customisations to support DVAI's dual-licensing commercial model. Version 1.0 · Effective 15 May 2026.