Start free. No credit card required.
For Knowledge Builders starting their first notebook.
or £7.20/month billed annually
For Knowledge Builders compounding serious thinking in the cloud.
Totally Risk-Free 100% Money-Back Guarantee — 30 days, every penny back, you keep your notebooks.
or £15/month billed annually
For Knowledge Builders who think visually. Images become part of your knowledge graph.
or £39.20/month billed annually
For researchers working across multiple notebooks, equations, and synthesis layers.
For research teams building a shared knowledge field. Contradiction detection across researchers.
Programmatic access to the V9 intelligence layer. For developers building on Blue Whale Memory.
Free tier data lives entirely on your device. Paid tiers carry a 30-day full refund — no questions, no penalties. Cancel any time. Your notes, chapters, and syntheses export as clean, portable Markdown. No lock-in at any tier.