SecondBrain vs Supernotes
SecondBrain
secondbrainmemory.com
Supernotes
supernotes.appSide by side
| Figure | SecondBrain | Supernotes |
|---|---|---|
| Price from | $2.92/mo | £6/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Plans published | 3 | 6 |
| Spec score · AI Note-Taking Apps | 7.9 (#31) | 8.7 (#9) |
| Export | Pro on iPhone can export notes as Markdown files in a ZIP; the maker says this is a manual export rather than continuous sync. | Cards can be exported as Markdown, JSON or PDF, and the API can send notes to other formats or services. |
| Headquarters | Sheridan, Wyoming, USA | The company lists 86-90 Paul Street, London, United Kingdom EC2A 4NE as its address. |
| Support | The maker says users can request a full data export for other data or platforms by emailing its listed support address. | Support consists of a help center with guides and tutorials plus direct in-app messaging, including support outside normal weekdays. |
| What it does | SecondBrain turns voice input into organized notes, calendar events and reminders. | Supernotes is a collaborative note-taking service for ideas, records, tasks and lists built around digital notecards. |
Plans
Supernotes
- StarterPriced on request
- Unlimited£6 a month
- Unlimited£72 a year
- StarterFree
- Unlimited monthly£6 a month
- Unlimited annual£72 a year
In their own words
SecondBrain
SecondBrain turns spoken thoughts, typed notes and content shared from other apps into organized notes, calendar events and reminders. Its AI transcribes, titles and files notes into a folder tree that builds as material is added. Mentioning a date can create an event and reminder, and the app provides a daily morning briefing. Full-text search and an interactive 3D graph help users find notes and explore connections. A shared-memory connector using MCP supports assistants including Claude, ChatGPT, Gemini, Cursor and Claude Code. The connector requires Pro, and connecting ChatGPT also requires Developer mode, which the maker says is available on Plus or above. The maker says notes and calendar events are stored in an EU-hosted Supabase PostgreSQL database with per-account Row-Level Security; voice and text go through Google Gemini's paid API tier, which it says does not train on content. The free plan has limited notes. Pro is $8.99 a month or $34.99 a year; the App Store also lists a second yearly price of 44.99 USD.
Supernotes
Supernotes is a note-taking app that organizes ideas, records, tasks, and lists as digital notecards. Cards can include equations, tables, images, checklists, and emojis, with a soft limit of 1,200 characters. Users can tag, nest, and link cards, search them, and explore their connections with graph views. The apps work offline and merge changes and sync when a device reconnects. Cards can be shared for read-only access or collaborative editing in real time. Supernotes imports from Obsidian, Roam Research, Google Keep, Notion, or Markdown, and exports notes as PDF, JSON, or Markdown. It offers an API and lists integrations including Telegram, Raycast, Pipedream, email, SupaSend, and Funnel. The company says notes are encrypted in transit with SSL and at rest with AES-256, and staff do not access note content without express permission during support. The free Starter plan lists 100 cards. Unlimited costs £6 a month, billed as £72 billed annually, and includes unlimited cards, AI Superpowers, full API and integrations, and priority support.