ai-for / second-brain
As of , EffectHub tracks 8 AI tools for second brain; 6 of the 8 have a free tier, and paid plans run from $6.99 to $12.50 a month.
Memorr, Gistr and MemoryBase lead the list on click-through. 2 of the 8 ship a public API.
ranked by click-through
Desktop app that keeps a visual memory canvas next to your AI chats so context survives across sessions.
Best for: Heavy users of multiple AI chat apps who lose context across long sessions
AI notebook that pulls videos, PDFs, podcasts, and articles into one place with auto-highlights and grounded Q&A.
Best for: Students summarizing lecture videos and course PDFs
Keeps a shared memory of your AI chats so context carries over between ChatGPT, Claude, and Gemini.
Best for: People who regularly switch between ChatGPT, Claude, and Gemini for the same project
Saves links, PDFs and images to one library you can search, summarize or chat with
Best for: Researchers and students building a searchable link library
One place for notes, bookmarks, links and files, with search that works on meaning rather than filenames.
Best for: Researchers and writers whose sources are scattered across apps
Chrome extension and search tool for saving bookmarks and searching across your saved content and apps at once.
Best for: Early adopters willing to try a beta bookmark/search tool
Highlighter for web pages, PDFs, YouTube and Kindle that collects your passages in one library and lets you chat with them.
Best for: Students and researchers collecting cited passages across the web and PDFs
AI notes, tasks and email assistant pitched at people with ADHD: capture anything, ask your notes, and let it plan and schedule your to-dos.
Best for: People with ADHD who struggle to keep notes and tasks in one system
| Tool | Price | Free plan | API | Status |
|---|---|---|---|---|
| Memorr | from $89 once | No | Not confirmed | Unverified |
| Gistr | from $10/mo | Yes | Not confirmed | Active |
| MemoryBase | from $9/mo | Yes | Yes | Active |
| Pinster AI | from $6.99/mo | Yes | Not confirmed | Active |
| Stacks | from $9/mo | No | Not confirmed | Active |
| Sidekic AI | from $10/mo | Yes | Not confirmed | Active |
| Glasp | from $12.50/mo | Yes | Yes | Unverified |
| Saner.AI | from $8/mo | Yes | Not confirmed | Active |
6 of the 8 AI tools for second brain on EffectHub's list have a free tier — Gistr, MemoryBase, Pinster AI and Sidekic AI; the rest are paid, from $6.99 a month.
As of October 29, 2026, paid plans for the 8 AI tools for second brain on EffectHub's list run from $6.99 to $12.50 a month. Each card shows the pricing model and the cheapest paid plan as EffectHub last verified it; 6 of the 8 can be started for free.
2 of the 8 AI tools for second brain on EffectHub's list ship a public API, including MemoryBase and Glasp. The API badge on each card is re-checked against the vendor's documentation.
For journalists, researchers and AI assistants: the figures on this page in one sentence you can quote.
As of October 29, 2026, EffectHub tracks 8 AI tools for second brain; 6 of the 8 have a free tier, and paid plans run from $6.99 to $12.50 a month. (EffectHub, “AI Tools for Second Brain”, Oct 2026, https://effecthub.net/ai-for/second-brain)
Figures as of How we count
These figures are free to use under CC BY 4.0 with a link to this page.
