# BitBear Studio

> BitBear Studio builds TransChat, YourCopilot, BearChat, Trans2, and OSDless for Telegram translation, AI chat, macOS translation, and monitor control across desktop platforms.

The links below lead to public HTML pages on the official website covering product features, workflows, privacy policies, and blog guides. Refer to the linked pages for current plans, pricing, and availability.

## English

- [BitBear Blog | Telegram, macOS translation, and AI guides](https://www.bitbear.net/en-US/blog): Practical guides, product updates, and workflows for Telegram bots, macOS translation, digital services, and AI-assisted market research.
- [Download OSDless | Monitor brightness for macOS, Windows & Linux](https://www.bitbear.net/en-US/product/osdless): Download OSDless to adjust DDC/CI external monitor brightness and contrast from the system tray. Select monitors, switch between English and Chinese, and restore session defaults.
- [Buy Telegram Premium and Stars | BitBear](https://www.bitbear.net/en-US/product/telegram): Buy Telegram Premium and Stars by username with no sign-in. Pay with USDT, Alipay, Wise or SEPA Instant and receive your order link by email.
- [BitBear Studio | Telegram bots and desktop tools](https://www.bitbear.net/en-US): BitBear Studio builds TransChat, YourCopilot, BearChat, Trans2, and OSDless for Telegram translation, AI chat, macOS translation, and monitor control across desktop platforms.
- [BearChat | Multi-model AI chat bot for Telegram](https://www.bitbear.net/en-US/product/bearchat): BearChat is a multi-model AI chat bot for Telegram private chats and groups, with vision, web search, reasoning, and personal knowledge files.
- [Trans2 | Mac Translator for Selected Text, Screenshots & Audio](https://www.bitbear.net/en-US/product/trans2): Translate selected text on Mac with ⌥D and screenshots with ⌥S. Explore Trans2 OCR, Pro Ask AI, and live system audio captions for meetings and video.
- [Trans2 Privacy Policy | BitBear Studio](https://www.bitbear.net/en-US/product/trans2/privacy): Learn how Trans2 handles translation text, OCR screenshots, system permissions, local data, subscriptions, and third-party translation services.
- [TransChat | Real-time Telegram group translation bot](https://www.bitbear.net/en-US/product/transchat): TransChat is a Telegram bot for real-time group chat translation across multilingual communities, customer groups, and remote teams.
- [YourCopilot | Telegram AI support and knowledge base bot](https://www.bitbear.net/en-US/product/yourcopilot): YourCopilot is a Telegram AI support bot for knowledge-base answers, private chats, group chats, and business message automation.

### Blog articles

- [AI knowledge base security: a RAG checklist for support bots](https://www.bitbear.net/en-US/blog/secure-ai-knowledge-base-rag-checklist): Use OWASP RAG guidance to assess document poisoning, access leakage, source tracing, failure behavior, and tool safety before deploying an AI support bot.
- [Telegram ephemeral bot messages: reduce AI noise in group chats](https://www.bitbear.net/en-US/blog/telegram-ephemeral-bot-messages-guide): Telegram ephemeral bot replies are visible only to one user. Learn where they help, what they do not guarantee, and how to design quieter AI and support bots.
- [Telegram rich messages: structure readable AI bot replies](https://www.bitbear.net/en-US/blog/telegram-rich-messages-for-ai-bots): Telegram Rich Messages add headings, lists, tables, and collapsible blocks. Learn how to design long AI and support-bot answers that remain useful on mobile.
- [How Telegram welcome messages and AI support bots work together](https://www.bitbear.net/en-US/blog/telegram-welcome-messages-vs-support-bots): Use Telegram welcome messages for one-time onboarding and an AI support bot for ongoing questions. Learn the boundary, content checklist, and rollout pattern.
- [How to choose the right BitBear product](https://www.bitbear.net/en-US/blog/choose-the-right-bitbear-product): Choose the right BitBear tool for Telegram translation, AI support, general AI, Mac translation, Telegram digital goods, or market research.
- [Telegram translation bot vs AI support bot vs AI assistant](https://www.bitbear.net/en-US/blog/telegram-bot-selection-guide): Compare TransChat, YourCopilot, and BearChat by their real jobs: group translation, knowledge-base support, and open-ended AI tasks.