Second Brain
It's like a personal assistant who takes notes, keeps your documents, searches your email, and answers your questions. Interact with voice or text.
How can I help?
Knowledgebase
Remember What Matters
Second Brain doesn't try to remember everything you've ever said, which would result in self-contradictory memory soup. Instead it decides what's actually important, and stores that in a personalized knowledgebase. Like an assistant with a notebook.
- Focused
- Uses context and relevance to only store specific relevant facts, lists, and important information - not a mishmashed memory of everything.
- Dynamic
- Intelligently updates and deletes items in its knowledgebase, keeping it correct and up to date.
- Grounded
- Uses its knowledgebase to answer your questions, avoiding hallucinations typical of other AI systems.
I need to buy peanut butter, please put that on my shopping list.
OK
I'm near the pharmacy. Is there anything on my shopping list that I should pick up there?
Hand lotion.
OK I'll get that, please remove it from the list.
Visual Intelligence
See What You Mean
Second Brain understands images and PDFs just like it understands text. Find, organize, and reference your visual content with natural language.
- Image Understanding
- Analyzes and understands the content of images, allowing you to search and reference them using natural language.
- Visual Search
- Find images by describing what you're looking for, not just by tags or filenames. (This only works for images and PDFs that are in your repository.)
- Information Extraction
- Reads and remembers information from PDFs and images, allowing you to ask questions about their contents later.
I saw this poster in my apartment building
It looks like a notice about an upcoming apartment association meeting.
That apartment association meeting is today, right? When does it start?
Yes, it's today starting at 6:30 pm.
I won't be back in time, is there a phone number or a zoom link?
Yes, it's zoom meeting ID 987 654 321, passcode parkview25.
Email Search
Gmail Integration (read-only)
Second Brain can search your Gmail mailbox, read the messages, and access attachments. It can't send email on your behalf.
- Smart Email Search
- Second Brain can search your mailbox as you would, using keywords, dates, to/from addresses, etc.
- Read Attachments
- Second Brain can process attachments (images and PDFs only for now) like it would any other resource.
- Strong Authentication
- Securely connect your Gmail and Second Brain accounts. Your Google password is never stored on our servers. You can disconnect at any time and the rest of Second Brain will still work.
Can you find my rental car voucher in my email? I think I made the reservation a few months ago.
Yes, I found your rental car confirmation from Enterprise. Here are the details:
Enterprise Car Rental Confirmation
From: Enterprise Rent-A-Car
Date: December 15, 2023
Reservation Details:
- Pickup: February 5th, 5:00 PM
- Location: BOS Airport
- Vehicle: Toyota Camry
I'm here picking up the car, what's the confirmation number on that reservation?
The confirmation number for your Enterprise rental is TM3141.
Internet Search
Realtime Information and General Knowledge
Second Brain can choose to search the internet to ground its responses in real-time information and general knowledge.
- Realtime Information
- Get up-to-date information on weather, stock prices, and current events.
- Unit Conversions
- Convert between different units of measurement, currencies, and time zones. Get accurate conversions for any unit type.
- Public Information
- Access encyclopedias, news articles, websites, and other public knowledge sources to provide accurate, well-researched information.
When is rain next forecast in Boston?
Rain is next forecast in Boston on Friday, May 9, 2025, with cooler temperatures and rain expected.
What is the undergraduate population of MIT in 2025?
MIT's undergraduate population for the 2024–2025 academic year is 4,535 students.
Are the tariffs on Canada still in effect?
Yes, tariffs on Canadian goods are still in effect as of May 2025. The United States has imposed 25% tariffs on a range of Canadian imports, including steel, aluminum, and automobiles.
Simple Pricing
Get access to all features with our straightforward monthly subscription. No hidden fees, no tiers.
Monthly subscription
Get full access to all Second Brain features. Cancel anytime, no questions asked.
What's included
- Smart memory management
- Image understanding & search
- Gmail integration (read-only)
- Regular feature updates
- Voice mode
- Text mode
Monthly subscription
$50/month