Send your thoughts, ideas, and observations straight to WhatsApp — no folders, no tags, no structure. Brain Flow captures everything and surfaces the trends that matter to you.
Stop letting ideas vanish. The act of capture is enough — the rest happens automatically.
You already use WhatsApp every day. Just message Brain Flow like you'd message a friend — raw, unfiltered, imperfect.
AI reads across all your notes over time and connects the dots you'd never spot yourself — recurring themes, shifts in focus, emerging ideas.
Every evening, receive a quiet summary of what you captured — so your day's thinking becomes a permanent, searchable memory.
Your thoughts are yours. We store only what's needed to power your experience, encrypted, and never sold or shared.
"I've tried Notion, Roam, Obsidian — I always stopped using them after a week. Brain Flow is the first thing that actually stuck. I just text it like I'm venting to a friend."
"After 3 months, it surfaced that I'd mentioned 'burnout' or 'overwhelmed' 40+ times. I had no idea. That insight alone was worth everything — it pushed me to actually make a change."
"As a researcher I have hundreds of half-formed thoughts a day. Brain Flow is like having a second brain that actually remembers everything and shows you what matters."
Request an invite and add Brain Flow on WhatsApp. No app to install, no account to create.
Send any thought, idea, or observation — text, voice notes, or images. Don't think about format.
Ask a question, request a digest, or let Brain Flow proactively surface what your notes reveal.
Brain Flow was built out of frustration with note-taking apps that demand more structure than the ideas themselves. Real thinking is messy, non-linear, and fast. Your tools should be too.
We're a small team obsessed with the gap between having ideas and doing something with them. Brain Flow is our answer: a WhatsApp-native thought companion that captures everything and does the thinking-about-your-thinking for you.
Brain Flow is currently invite-only while we scale carefully. Every user gets our full attention.
General inquiries
[email protected]Privacy & data requests
[email protected]Support
[email protected]Website
brain-flow.orgNo. Brain Flow works entirely through WhatsApp, which you already have. Just save the number and start messaging — there's nothing to download or set up.
Yes. Your notes are stored encrypted and are never shared with or sold to third parties. Your phone number is stored as a one-way cryptographic hash — we can't reverse it. Read our full Privacy Policy for details.
Text, voice notes, and images. Brain Flow transcribes voice messages automatically and can describe images, so everything ends up as searchable text in your personal memory.
Your messages are processed using AI to extract meaning and create embeddings — a mathematical representation of what you wrote. Over time, the system clusters related ideas and surfaces themes that appear repeatedly, even if you used different words each time.
Yes, at any time. Send an email to [email protected] and we will permanently delete all your data within 7 days.
Brain Flow is currently invite-only. Send us an email at [email protected] to join the waitlist and we'll reach out with your invite link.