Windlass is a hosted service built on open-source software. The workspace you use is DeepSeek Harness, released by DeepSeek under the Apache License, Version 2.0, with modifications by Windlass (product branding, an English workspace wrapper for attachments, OCR and voice input, and the account, billing and metering layer that hosts it).
| Component | License | Use |
|---|---|---|
DeepSeek Harness (@deepseek-ai/dsh) | Apache-2.0 | The agent runtime and browser UI |
| Node.js | MIT | Server runtime |
| Express, EJS, marked, nodemailer | MIT | Website and account service |
| Tesseract OCR | Apache-2.0 | Text recognition for attached images |
| Caddy | Apache-2.0 | Edge routing in production |
| Inter, JetBrains Mono | SIL OFL 1.1 | Typography |
Copyright DeepSeek. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at https://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Windlass is not affiliated with or endorsed by DeepSeek. DeepSeek is a trademark of its owner.
Our changes to the upstream harness are limited to presentation (product name, welcome screen), an English wrapper that adds attachments, OCR sidecars and voice input, and reliability fixes for connector session recovery. The core agent behaviour is upstream. Write to us for details of the modified files.