Leasey
Solution

Conversational AI & Chat Lookup

Production-grade chat systems that answer from your sources with citations, guardrails, and session memory.

Grounded chat over your own data

We design and ship chat experiences that understand your domain. Your users ask questions in natural language; the system retrieves the right context, generates grounded answers, and cites the source. We handle conversation state, multi-turn context, tool calls, streaming, auth, and rate limits end to end.

Outcomes

40-70%
ticket deflection on support chat
<1.5s
time-to-first-token target
>92%
citation-grounded responses
How we build it

Our approach.

01

Scope & success criteria

We pin down the top 20 real user questions, the data sources they touch, and what a "good" answer looks like — measurable, not vibes.

02

Retrieval & grounding

We build a permission-aware retrieval layer over your data, with hybrid search, reranking, and citation tracking by default.

03

Guardrails & eval harness

PII detection, out-of-scope refusal, prompt-injection resistance, and a faithfulness eval that gates every change.

04

Ship & observe

Deploy to your cloud with streaming, tracing, cost attribution, and dashboards — so the team sees what users actually ask.

Capabilities

What you get.

Streaming chat with citation rendering
Multi-turn memory with thread persistence
Tool calling for database and API lookups
Role-based access control on retrieved context
Guardrails for PII, policy, and out-of-scope queries
Analytics on intents, deflection, and satisfaction
What it looks like

Production-shaped, from day one.

chat.ts
// Grounded chat with citation + scoped retrieval
const response = await chat.ask({
  query: "What medications am I currently taking?",
  user: patient.id,
  scope: { permissions: "own_records_only" },
  retrievers: ["ehr", "notes", "labs"],
  evaluators: ["faithfulness", "pii_leak", "refusal"],
  stream: true,
})

for await (const chunk of response) {
  render(chunk.text, chunk.citations)
}
// -> { trace_id, cost_usd, latency_ms, citations[] }
Architecture

A proven shape for this solution.

We adapt it to your cloud, data, and compliance requirements. Nothing here is boilerplate — every layer is justified by the numbers.

01
Frontend SDK (React/Next.js) with streaming
02
Orchestration layer (LangGraph / LlamaIndex / custom)
03
Retrieval over vector + keyword indexes
04
LLM router across OpenAI, Anthropic, Bedrock, Azure OpenAI
05
Eval + tracing via Langfuse, LangSmith, MLflow
Use cases

Where this shows up.

  • Patient-facing health information chat over mapped EHR data
  • Internal knowledge assistants for support and ops teams
  • Customer-facing product Q&A with docs and changelog
  • Coaching assistants that reference session history and goals
Stack

What we use.

We’re not religious about tools. We pick what fits your constraints and team.

OpenAI
Anthropic
AWS Bedrock
Azure OpenAI
LangChain
LangGraph
LlamaIndex
Pinecone
pgvector
Langfuse
In production

Shipped examples.

Healthcare

Healthcare patient data mapping & health information chat

Mapped and normalized patient data to power a grounded chat experience where patients can ask questions about their own health information — safely.

AWS BedrockAnthropic ClaudepgvectorLangGraphLangfuse
Coaching & Wellness

Coach session intelligence & program updates

Turned coaching session notes and history into structured program updates, progress summaries, and next-action recommendations.

OpenAIAnthropicLangGraphPostgrespgvector
Common questions

What teams usually ask.

How do you prevent hallucinations?

+

Citation-grounded generation, faithfulness evals on every change, and configurable refusal behavior for out-of-scope queries. We measure hallucination rate and gate deploys on it.

Can the chat access private or user-specific data safely?

+

Yes — we build permission-aware retrieval so each user only sees context they're entitled to. Access is enforced in the retrieval layer, not just the prompt.

Which model do you use?

+

We route across providers (OpenAI, Anthropic, Bedrock, Azure OpenAI) based on the task, cost, and latency requirements. Model choice is never a lock-in.

Ready to accelerate your tech growth?

Schedule your free consultation today and let's discuss how we can help your business scale efficiently.

Tech growth illustration
Ready when you are

Let’s ship your AI system.

Whether you’re scoping a new LLM product, hardening an existing one, or standing up the infra behind it — we’ll map the shortest path to production.

Email the teamOther ways to reach us