Knowledge calibration
Your knowledge,
calibrated.
Most tools remember everything.
Cerbel knows what to trust.
Built on peer-reviewed research in temporal knowledge graphs, belief provenance, and agent memory architecture.
Prefers async written updates over calls
Every AI tool you've used has confidently told you something that was months out of date, or quietly contradicted itself between sessions, or based a recommendation on something you mentioned once in passing. Not because the model failed — because nothing in these systems tracks whether what they know is still true.
Cerbel does.
The belief ledger
Not a note. Not a memory.
A belief — with a source, a confidence score, and an expiry. Every piece of knowledge Cerbel holds is structured, tagged with where it came from, how confident you should be, and when it was last confirmed.
Prefers async written updates over calls
Confidence decay
Knowledge has a half-life.
Beliefs lose confidence over time if not reconfirmed. The system surfaces what's going stale before it misleads you. Cerbel tracks it.
"Uses Figma for all wireframes"
Contradiction detection
When something changes, you'll know.
When new information conflicts with something already known, Cerbel flags both beliefs rather than silently overwriting either. Not three months later.
Prefers weekly sync calls
Switched to async updates — Feb 2026
The confidence drawer
Every answer shows its work.
Every AI response shows the beliefs it relied on — with their confidence levels, sources, and recency — so you can see exactly why Cerbel said what it said. And their expiry dates.
Based on what I know, Sarah prefers receiving async written updates and has budget approved through Q3. I'd recommend sending a written proposal rather than scheduling a call.
Prefers async updates
Budget approved through Q3
Uses Jira for tracking
Universal entity support
For anything you need to understand accurately over time.
Research foundations
Cerbel's architecture is derived from published research in temporal knowledge graphs (Graphiti / Zep, 2025), belief confidence modeling (HINDSIGHT, 2025), and agent memory benchmarks (LongMemEval, AgeMem). It is the first consumer product to implement these findings as a usable interface.
What this means for you
- Beliefs don't just accumulate — they decay correctly
- Contradictions are detected, not silently overwritten
- Confidence is derived from evidence, not guessed
Pricing
Simple, honest pricing
Free
One entity, 25 beliefs, 10 chat messages per month. Enough to experience the product. Not enough to rely on it.
Start freeSolo
Ten entities, 500 beliefs, unlimited chat, document import. Everything a solo practitioner needs to keep their knowledge calibrated.
Start free trialPro
Unlimited everything. Obsidian sync, knowledge graph traversal, conflict resolution workflow, entity health scores, and belief timelines. For people who take this seriously.
Start free trialLifetime — $199 one-time. Lock in Pro features permanently. Available for early supporters only.
Get lifetime access →