Version 1.1.0, effective 2026-09-03. Copyright © 2026 Rapidly Labs AS. All rights reserved. This is the text of the LICENSE file shipped with every SDK distribution and published in the public GitHub repository.
This Software ("the Rapidly SDK") is proprietary commercial software of Rapidly Labs AS, a company incorporated in Norway. Use of the SDK requires a valid Rapidly licence issued by Rapidly Labs AS. Without a valid licence, the SDK operates in a watermarked demo mode that audibly degrades its output.
By downloading, installing, or using the SDK you agree to the terms below.
This Agreement, together with any separate commercial agreement you have signed with Rapidly Labs AS, is the complete agreement governing your use of the SDK. The Rapidly Privacy Policy describes how Rapidly Labs AS handles the data described in this Agreement.
1. Grant of licence
Subject to a valid Rapidly licence and the terms of any separate commercial agreement with Rapidly Labs AS, you are granted a non-exclusive, non-transferable, non-sublicensable licence to:
- (a) embed the SDK binaries within your own end-user applications, products, or services;
- (b) load the audio model files distributed with the SDK or supplied to you by Rapidly Labs AS, but only the model identifiers and latency variants encoded in your Rapidly licence ("model entitlements").
2. Licence types
Rapidly Labs AS issues three kinds of key. All are registered with the SDK in the same way; the key determines how the SDK is authorised. Whichever key is used, audio is processed on the device and is never sent to Rapidly Labs AS.
2.1 Licence Keys (lk_)
A licence key is an offline credential that is either perpetual or carries an expiry date set by Rapidly Labs AS. It is verified on the device, and the models and latency variants it covers are enforced when a model is loaded. No network access is required or attempted.
2.2 Subscription Keys (sk_)
A subscription key is an online, usage-based credential. The SDK contacts the Rapidly licensing service to authorise processing, to report each end-user session, and to meter usage for billing, as described in section 3. You must keep the subscription key on your own backend; devices running the SDK obtain short-lived tokens from your backend and never hold the key itself. If the licensing service is unreachable, processing continues for a limited grace period and then produces watermarked output until contact is restored.
2.3 Activation Keys (ak_)
An activation key is for installations that run fully offline. Each device or installation contacts the Rapidly licensing service once to activate, sending only a hashed identifier of that unit, and then operates without any network access until its authorisation must be renewed. Renewal intervals are agreed with Rapidly Labs AS. Renewal is attempted automatically whenever the unit has internet access, and can also be requested explicitly. A unit whose authorisation has expired and has not been renewed produces watermarked output until renewal succeeds.
3. Data reported by the SDK
With a licence key, the SDK reports nothing to Rapidly Labs AS.
With a subscription key, the SDK reports to the Rapidly licensing service, at the start and end of each end-user session and periodically while it runs: a session identifier, the session's start and end times, the amount of processing time, whether the output was authorised or watermarked, the end-user identifier your application supplies, and the application or website origin the session token was issued for.
With an activation key, each unit reports a hashed identifier of the unit, the time of activation or renewal, and any label or notes you attach to the key or the unit in your Rapidly account.
In every mode the SDK reports no audio, no audio-derived content, and no information about what the audio contains. Rapidly Labs AS uses the reported data only to authorise the SDK, to meter and bill usage, to protect the licensing service from abuse, and to meet its legal obligations, as described in the Rapidly Privacy Policy. Any change to the data reported will be documented in the SDK documentation and changelog before it takes effect.
You agree that:
- (a) the end-user identifier you supply must be an opaque value such as a random identifier or a hash. It must not be an email address, a name, a phone number, a device serial number, or anything else that identifies a person or a device on its own;
- (b) you are responsible for informing your own users about the SDK's reporting and for obtaining any consent that the law applicable to your application requires;
- (c) you will not alter, suppress, or falsify the data the SDK reports.
4. Restrictions
You may not:
- (a) reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code, signing keys, or model weights from the SDK or its model files, except to the extent that applicable mandatory law prohibits this restriction;
- (b) redistribute the SDK or any of its components as a standalone product, library, or service;
- (c) load model files, model identifiers, or latency variants not covered by your Rapidly licence, or attempt to bypass, disable, or circumvent licence verification, activation, renewal, session reporting, or watermarking;
- (d) remove, alter, or obscure any copyright, trademark, licence notice, or other proprietary marking on the SDK, its model files, or any accompanying documentation;
- (e) use the SDK in any manner that violates applicable law or any additional terms of your separate commercial agreement;
- (f) share a subscription key with any third party, embed it in an application or device distributed to end users, or hold it anywhere other than on your own backend systems.
5. Updates and model versions
Rapidly Labs AS may release updates to the SDK binaries and to the model files. Patch revisions to a model file (same model_id, increased model_version) are covered by your existing Rapidly licence. Minor and major model revisions, which carry a new model_id, may require an upgraded or new Rapidly licence.
6. Ownership
The SDK, its model files, and all related intellectual property are and remain the exclusive property of Rapidly Labs AS. Nothing in this Agreement transfers ownership of any intellectual property to you.
7. No warranty
THE SDK IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. RAPIDLY LABS AS DOES NOT WARRANT THAT THE SDK OR THE RAPIDLY LICENSING SERVICE WILL BE UNINTERRUPTED, AVAILABLE, OR ERROR-FREE. WHERE THE LICENSING SERVICE CANNOT BE REACHED, THE SDK'S FALLBACK TO WATERMARKED OUTPUT AFTER THE GRACE PERIOD IS INTENDED BEHAVIOUR AND NOT A DEFECT. ANY AVAILABILITY COMMITMENT FOR THE LICENSING SERVICE IS GIVEN ONLY IN A SEPARATE COMMERCIAL AGREEMENT.
8. Limitation of liability
IN NO EVENT SHALL RAPIDLY LABS AS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES, OR FOR ANY LOSS OF PROFITS, REVENUE, DATA, OR USE, ARISING FROM OR RELATED TO THIS AGREEMENT OR THE SDK, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE TOTAL AGGREGATE LIABILITY OF RAPIDLY LABS AS UNDER THIS AGREEMENT SHALL NOT EXCEED THE FEES PAID BY YOU FOR THE RAPIDLY LICENCE COVERING THE PERIOD IN WHICH THE CLAIM AROSE.
9. Termination and suspension
This Agreement terminates automatically upon expiry of your Rapidly licence, upon any material breach of this Agreement, or as specified in your separate commercial agreement with Rapidly Labs AS. For a subscription key, the licence also ends when the subscription is cancelled or lapses for non-payment. For an activation key, each unit's authorisation ends when it expires without renewal.
Rapidly Labs AS may suspend or revoke a subscription or activation key on material breach of this Agreement, on non-payment, or where the key is being used in a way that threatens the security or integrity of the licensing service. While a key is suspended, revoked, or expired, the SDK produces watermarked output.
Upon termination you must cease all use of the SDK and destroy all copies in your possession, except that devices already in the hands of your end users may continue to run the SDK in watermarked mode.
10. Governing law
This Agreement is governed by the laws of Norway, without regard to conflict-of-law principles. Disputes shall be resolved in the courts of Oslo, Norway.
11. Contact
- Commercial licensing enquiries: sales@rapidly.io
- Technical support and key issuance: support@rapidly.io
Last updated: 2026-09-03.