Heptabase vs Murble

Heptabase is a visual knowledge base for students, researchers, and lifelong learners. Whiteboards and cards support visual thinking, while a block-based editor, bidirectional links, PDF annotation, daily journals, and a web clipper help organize material. Its AI can explain sources, take notes, and organize a knowledge base from PDFs, YouTube, notes, and journals. Heptabase supports web, Windows, macOS, Linux, iOS, Android, and a Chrome extension, and lists integrations with Readwise and Zotero. The free plan is available through collaboration, allowing edits to shared whiteboards and cards but excluding personal libraries, journals, tag databases, tasks, highlights, and AI features. The desktop app stores data locally, and notes and files are accessible offline. For AWS cloud storage, the company describes encryption in transit and at rest, but not end-to-end encryption. After a subscription or trial ends, users can access and export content indefinitely; creating or editing notes requires renewal. Paid plans start at $8.99/user/mo (annual), with a 7-day trial.

Murble records or imports audio and creates transcripts, summaries and task lists on the device. Transcripts appear while recording and are time-aligned, editable and searchable, with anonymous speaker labels and audio clip sharing. You can export to PDF, Markdown, RTF, plain text, JSON, SRT or VTT. Once required models are downloaded, recording, transcription, summaries, reports, chat and translations can work offline. Pro live translation supports 20 languages. Murble's iOS edition supports Apple Reminders sync, Siri, Shortcuts, Action button, widgets, Control Center and Spotlight; Reminders sync is a Pro feature. The maker says recordings are processed on-device and there is no content-processing server. Optional sync stores selected content in private iCloud or Google Drive app data, but Android Google Drive copies are not end-to-end encrypted. Murble says Android Google services process technical diagnostics, while note content is not sent to an AI server. Users can begin recording without an account. The free plan includes unlimited recording and on-device transcription; paid plans start at $2.99 a month.