Heptabase organizes deep research. Overscope listens.
Heptabase is a visual note-taking tool built for serious learning and research, letting you spread cards across whiteboards, connect them, and develop understanding over time. It rewards sustained, deliberate thinking. Overscope works at the opposite tempo: the fast, first capture of an idea you'd rather say than write.
What Heptabase is great at
Heptabase excels at long-form sense-making, with card-based notes, linked whiteboards, PDF annotation, and a workflow designed for connecting ideas across a whole project. It's powerful for researchers and learners.
Where Overscope is different
Overscope is for the moment before all that structure exists. You hold a button, speak, and on-device transcription turns your thinking into mind-map nodes; the audio is discarded and there's no transcript artifact. It captures, it doesn't curate.
| Overscope | Heptabase | |
|---|---|---|
| How you build the map | Speak — it structures for you | By hand, node by node |
| Primary input | Voice, push-to-talk | Typing, tapping, dragging |
| On-device transcription | Yes (Apple Speech) | Not the focus |
| Platform | iPhone, iOS 26 | Varies |
A characterization of each app's approach, not a feature audit. Heptabase is a capable mind-mapping tool; Overscope's difference is voice-first capture.
- Voice-first capture: speak the idea and get a structured map, not a research whiteboard to tend.
- On-device transcription; audio is processed in memory and discarded, never stored.
- Six switchable mind-map layouts versus free card placement across linked boards.
- Heptabase is cross-platform with deep note linking and PDF annotation; Overscope is iPhone-only.
- Heptabase is for sustained research; Overscope is for fast capture, with PNG export and no transcript.
The verdict
If you do deep, ongoing research and want to connect cards across whiteboards, Heptabase is a serious tool. If you want to speak a thought and immediately see its structure, Overscope is built for that first capture.