Second Brains Explained
What Second Brains are, how they form, and how to use them as specialized AI experts.
Second Brains are BrainTube's most powerful feature — specialized AI agents that deeply understand specific domains of your knowledge.
How Brains Form
BrainTube analyzes your saved content and discovers topic clusters. When a cluster reaches 5 or more items, it becomes a Second Brain.
Brain Maturity
| Items | Maturity | Capability |
|---|---|---|
| 5-9 | 🌱 Seedling | Basic Q&A, simple summaries |
| 10-19 | 🌿 Growing | Good analysis, cross-referencing |
| 20-49 | 🌳 Mature | Deep insights, pattern detection |
| 50+ | 🏔️ Expert | Comprehensive analysis, gap identification |
Chatting with Your Brain
The brain understands your query, searches its knowledge, retrieves context, generates a response with citations, and reflects on confidence.
Available Skills
- Summarize — Condense information across sources
- Compare — Contrast viewpoints from different sources
- Deep Dive — Thorough analysis of a sub-topic
- Quiz — Generate questions to test your knowledge
- Teach — Explain concepts using your saved content
- Find Gaps — Identify areas where your knowledge is thin
Brain Features
- Voice Chat — Hands-free mode with speech recognition and TTS
- Conversation Starters — Suggested questions
- Memory — Remembers frequently asked questions
- Public Sharing — Make a brain public for others to query
- Embeddable Widget — Embed your brain as a chatbot on any website
- REST API — Programmatic access with bt_sk_ keys
Still need help? Email support.