Pricing
One plan.
$49 / month · $499 / year
Card at signup. No free trial.
Get startedIncluded
The engine, the databank, your strategies, and your record. Backtests over the databank's full history. Every view of every result you have computed.
Metered
AI copilot jobs draw on a visible credit meter. Asking and scoping are free; a job - running a strategy test, or cleaning a data upload - spends a credit only when you confirm it.
Everything in the one plan
Analysis
- Ask in plain English. The copilot proposes the exact test; you approve it; the engine computes it.
- Every rate arrives with its interval and its sample size - and how many things were tried before it.
- Drill from any figure to the raw rows. Every row sourced and dated - nothing renders that cannot be traced.
- Chat, chart, and data views of the same computed answer - three faces that always reconcile.
Strategies
- Build a strategy as weighted beliefs from an evidence-tiered library of 64 indicators - each carrying its tier, its reach, and what it does not tell you.
- Weights normalise live; every save is an immutable version; the ladder of versions is yours to walk back through.
- Save, rename, duplicate, export and import strategy configs as files.
- Starting templates are labelled beliefs. DeltaBook asserts none of them.
Backtesting
- Unlimited engine backtests over any window of the databank's history, for active subscribers.
- Every test sees only what was knowable before kickoff - enforced in the engine, not by promise.
- Calibration leads every result: the reliability curve with counts, Brier, and the baselines beside it.
- Every run is stored and reproducible by its ID.
The record
- Every saved strategy accrues a forward record automatically - written before the event, graded by the platform after it, never edited.
- Track a version and it goes on the record: permanent, attributed, irrevocable.
- Public receipts: a dated page for a result - frozen, platform-computed, yours to show.
- A withdrawn strategy keeps its record. Corrections are new rows with reasons, never overwrites.
Your data
- Upload your own data - the upload is free. The AI cleaner turns it into a structured bank as a metered job, on your confirm.
- Your uploads are badged as yours; the badge travels into every view and record built on them.
- Compare a probability against the number you type in. DeltaBook shows the gap and says nothing about what to do.
- Your entries and notes stay private, by design - never compared, never ranked, never shown to anyone.
The AI copilot
- A streaming chat over every view - talking is free. It builds, explains, and critiques, always as proposals you confirm.
- It never computes a figure, never touches your data rows, and never writes to your record.
- Bring your own AI key, or use ours.
- An MCP server for your own AI client - the same typed tools and the same confirmation gates, from the tools you already work in.
The full list
| Feature | The plan · $49/mo | Enterprise |
|---|---|---|
| Analysis | ||
| Plain-English questionsThe copilot proposes the exact test; you approve; the engine computes. | ✓ | ✓ |
| Chat, chart, and data views of every answer | ✓ | ✓ |
| Interval and sample size on every rate | ✓ | ✓ |
| Drill from any figure to the raw rowsEvery row sourced and dated. | ✓ | ✓ |
| Strategies | ||
| Evidence-tiered indicator libraryEach entry: its tier, its reach, and what it does not tell you. | 64 indicators | 64 indicators |
| Weighted-belief strategy builder | ✓ | ✓ |
| Immutable versions | Unlimited | Unlimited |
| Strategies tiled on one screen | Up to 4 | Up to 4 |
| Strategy config filesSave, rename, duplicate, export, import. | ✓ | ✓ |
| Backtesting | ||
| Engine backtests, the databank's full historyFor active subscribers. | Unlimited | Unlimited |
| Only-what-was-knowable enforcementIn the engine, not by promise. | ✓ | ✓ |
| Calibration, Brier and baselines on every run | ✓ | ✓ |
| Runs stored, reproducible by ID | ✓ | ✓ |
| The record | ||
| Automatic forward record on every saved version | ✓ | ✓ |
| TrackingLocked before the event, graded after, never edited. | ✓ | ✓ |
| Public receiptsPermanent, dated, platform-computed. | ✓ | ✓ |
| Corrections as new rows, never overwrites | ✓ | ✓ |
| Your data | ||
| Data upload | Free | Free |
| AI cleaning into a structured bank | Metered, on confirm | Metered, on confirm |
| Your-upload badge travels into every view | ✓ | ✓ |
| Private entries and notesNever compared, never ranked, never shown to anyone. | ✓ | ✓ |
| Company data sources | - | By conversation |
| The AI copilot | ||
| Streaming chat over every view | Free | Free |
| Scoping and clarifying | Free | Free |
| AI jobsRunning a strategy test; cleaning an upload. | Metered | Metered |
| Visible credit meter | ✓ | ✓ |
| Bring your own AI key | ✓ | ✓ |
| MCP serverYour own AI client drives the same typed tools, behind the same confirmation gates. | ✓ | ✓ |
| Reading anything already computed | Free, always | Free, always |
| The plan | ||
| EnvironmentEnterprise runs private - your company's data stays inside it. | Platform | Private |
| Seats | 1 | By agreement |
| Billing | $49/mo · $499/yr | On contact |
| Implementation | Self-serve | Working session |
| After cancellationThe strategy stops, frozen; receipts are kept. | Read-only | Read-only |
The data
One instrument. The databank grows under it.
| Category | Status | Reach |
|---|---|---|
| SportsFootball today; basketball and more to follow. | Live | 27 seasons · from 1999 |
| Your own dataAny dataset you upload - cleaned, structured, badged yours. | Live | Whatever you bring |
| EconomicMacro indicators, company registers, trade. | Planned | - |
| PropertyHousing, rents, price indices. | Planned | - |
| WeatherConditions, forecasts, records. | Planned | - |
EXAMPLES, NOT LIMITS. NO DATES ON PURPOSE - A CATEGORY GOES LIVE WHEN ITS DATA SURVIVES THE SAME DISCIPLINE: SOURCED, LICENSED, DATED, ONLY WHAT WAS KNOWABLE.
Always free to read
A zero balance never hides a result you own. Your backtests, your calibration, and your record stay readable regardless of your credit balance. The meter prices the copilot's work, never the truth.
Enterprise
The instrument is the same. Two things differ: your company's data lives in a private environment, and the pricing is a conversation, not a listed price.
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