Licenses & attribution
CoStage Community Edition is distributed as compiled artifacts only and includes the
third-party components listed below. Attribution and the full license texts ship inside every release
(THIRD-PARTY.md and third-party/), and are reproduced here verbatim.
CoStage 社区版仅以编译产物分发，内含下列第三方组件。署名与许可全文随每个发布包一同提供
（THIRD-PARTY.md 与 third-party/），并在本页原样转载。
1 · LiveKit server — Apache-2.0
Apache-2.0 §4(d) requires redistributions to reproduce the upstream NOTICE — reproduced below.
NOTICE
Copyright 2023 LiveKit, Inc. 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 http://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.
Apache License 2.0
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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APPENDIX: How to apply the Apache License to your work.
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2 · ZLMediaKit — MIT
MIT License Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ---------------------------------------------------------------------------------------- 补充协议: 本项目采用类MIT协议，用户在履行MIT协议义务的同时，应当同时遵循保留ZLMediaKit软件版权信息的义务。 用户不得去除ZLMediaKit提供的各种服务中包括但不限于 "title"、"Server"、"User-Agent" 等字段中 "ZLMediaKit" 的信息。 否则本项目主要权利人(项目发起人、主要作者)保留声索起诉的权利。
3 · CoSlate — MIT
The whiteboard is CoSlate, an independent MIT-licensed scene runtime
(github.com/denniste/coslate),
inlined into the panel and the JS SDK as @coslate/core, @coslate/konva and
@coslate/ui (pinned 0.2.1). Version boundary: releases up to and including
v0.2.2 bundled a different engine that was not open source and forbade production
use; from v0.2.3 onwards that component is gone from every artifact, so no whiteboard
carve-out remains and production use needs no third-party licence. The verbatim MIT text ships in
third-party/LICENSE.coslate.txt.
白板引擎是独立开源项目 CoSlate（MIT，
github.com/denniste/coslate），
以 @coslate/* 内联进面板与 JS SDK（固定 0.2.1）。版本边界：
v0.2.2 及更早的发行版内置的是另一个**禁止生产环境使用**的非开源引擎；
自 v0.2.3 起该组件已从所有产物中移除，因此不再存在白板 carve-out，
生产环境无需任何第三方商业许可。许可全文随包提供：third-party/LICENSE.coslate.txt。
MIT License Copyright (c) 2026 CoSlate contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
4 · Other bundled components
| livekit-client · @livekit/protocol | Apache-2.0 — browser SFU client, inlined in the panel and SDK bundles |
|---|---|
| react · react-dom · i18next | MIT — SDK-embedded UI runtime, panel i18n |
| pion/webrtc · ice · dtls · srtp · stun · turn | MIT — WHIP push and the embedded TURN server |
| gorilla/websocket | BSD-3-Clause — business WebSocket gateway |
| redis/go-redis | BSD-2-Clause — Redis client |
| Redis · nginx · FFmpeg | BSD-3-Clause · BSD-2-Clause · LGPL/GPL — installed by the operator, not redistributed |
The authoritative, per-release list is THIRD-PARTY.md inside the release tarball.
5 · CoStage itself — MIT-licensed source, delivered to subscribers
This package is a free binary distribution (no source code). The full
engineering source — commit history, build scripts, tests and design docs — is MIT-licensed
and delivered to subscribers through a private repository
(source available to subscribers).
⚠ CoStage is therefore not an open-source project: open source (OSI) requires the source to be
publicly available and redistributable. Names and logos are not granted by the licence — see TRADEMARKS.md.
本包是免费二进制发行版（不含源码）。完整工程源码以
MIT 许可发布，仅对订阅用户通过私有仓库提供（源码可得：面向订阅者）。
⚠ 因此本项目不是开源项目——OSI 开源定义要求源码公开可得且允许再分发。名称与标识不在授权范围内（见
TRADEMARKS.md）。