Deterministic Contracts Reasoning Engine

The trust layer
for Legal AI

Built for CLMs, Legal AI platforms, and AI-native law firms.

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indemnification_cap■ live · §3.2
conf 1.000✓ deterministic · 138ms
Works with every model

Vichaara understands what your contracts do, not just what they say.

How it works

From text to structure

Vichaara compiles each contract into a graph of its normative structure. Our neurosymbolic engine then reasons over structure, never probability.

Contracts, redlines and supporting documents flow in from the tools you already run and are structured for analysis.

Why structure

Reading is not reasoning

An LLM can tell you what a clause says. What it does depends on the rest of the contract.

The problem
3 in 5
of legal AI’s wrong answers stem from flawed reasoning, not just hallucination.
66–89%
of multi-step legal inferences fail in the best LLMs, which apply the wrong rule or draw false conclusions.
SourcesStanford RegLab (2025)University of Pittsburgh (2026)
With Vichaara
Structural
Every obligation is modeled with what triggers, suspends, and limits it.
Deterministic
The same query always produces the same answer. No sampling, no drift.
Traceable
Every conclusion carries its reasoning, anchored to the clauses it came from.
Capabilities

Press play on your contracts

Once Vichaara knows what a contract does, you can run it: check where it stands, play events forward, compare versions, and draft language that fits.

State evaluation

Ask Vichaara what your contract actually means: which obligations are live, who holds termination rights, what liability caps apply. Every answer is deterministic and auditable.

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Event simulation

Tell Vichaara what happened: a missed SLA, notice served, consent withheld. It determines how your contract’s obligations and rights shift as a result.

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Redline & delta

Submit two versions of a contract and Vichaara surfaces what actually changed in legal position: not which words moved, but which obligations, rights, and caps shifted.

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LLM-agnostic NLG

Vichaara constrains the drafting space. Your preferred model produces clause language that is structurally consistent with the agreement, regardless of which model you use.

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Access

Get in touch

vichaara · prompt
contract reasoning engine · status: all systems normal
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We are working with a small number of legal AI and CLM teams. Bring us a contract and we will show you what it does.