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Home / AI Solutions / AI Chatbots & RAG SERVICE FILE · AI-01
AI-01 / AI CHATBOTS & RAG DEVELOPMENT

AI chatbots that answer from your own data. Every citation linked.

Not another ChatGPT wrapper. We build RAG systems that read your policies, contracts, product docs, or knowledge base. And answer questions with sources you can click through. Same tech we used to index 50,000+ Indian court judgments for VakeelSaathi.

50,000+Docs Indexed in Prod
<500msAnswer Latency
97%Top-3 Accuracy
8Indian Languages
FILE 01 / WHAT IS RAG (IN ONE PARAGRAPH)

A chatbot that has to cite the source.

RAG stands for Retrieval-Augmented Generation. Before the AI answers your question, it searches an index of your documents, pulls the most relevant paragraphs, and gives them to the model as context. The model can only quote what you gave it. That's why a good RAG bot doesn't hallucinate. If the fact isn't in your docs, it says "I don't know" instead of inventing something.

The plain ChatGPT you use in your browser doesn't do this. It answers from training data it was frozen on. Which is why it makes up citations, dates, and policy details when you ask about your company.

how a rag query flows
1User asks a question"What's our leave policy for probation employees?"
2Question is converted to embeddingsA vector representation of meaning, not keywords.
3Vector DB returns top 5 relevant chunksFrom Pinecone, Weaviate, or pgvector. Indexed on your docs.
4LLM answers using only those chunksGPT-4o, Claude 3.5, or a self-hosted Llama.
5Answer returned with source linksUser can click through to verify.
FILE 02 / PROOF OF WORK

How we built VakeelSaathi's legal RAG

India's Legal OS. 50,000+ Indian Kanoon judgments. Sub-500ms retrieval. Zero hallucinations.

EXHIBIT A The Problem

Lawyers were losing 4-6 hours a day to legal research.

Manual search on Manupatra or Indian Kanoon. Copy-paste citations. Miss the newer judgment because you didn't know to look for it. When you did use ChatGPT, it invented case numbers.

EXHIBIT B What We Built

A RAG index over every Supreme Court + High Court judgment.

Structured extraction of case number, citation, bench, court, subject, holdings. Semantic search over 50,000+ judgments. LLM answers with the actual case links.

EXHIBIT C The Numbers

97% top-3 accuracy. Sub-500ms. Zero invented cases.

Because every answer is grounded in real judgments with real citation numbers. If the case doesn't exist in the index, the bot says so. That's the point of RAG done right.

50k+docs
<500mslatency
97%top-3
the stack that shipped it
LLMClaude 3.5 SonnetGPT-4o fallback for cost
Embeddingstext-embedding-3-largeLegal domain tuned
Vector DBPinecone50,000+ vectors indexed
FrameworkLangChain + LlamaIndexCustom retrievers on top
See VakeelSaathi live →
FILE 03 / CHATBOT TYPES WE'VE SHIPPED

Six patterns. Pick the one that fits.

All six use RAG at the core. Each one gets a different UX layer on top.

TYPE-01

Internal Knowledge Chatbot

"What's our leave policy?", "How do I raise a purchase request?", "Where's the SOP for X?". Trained on your wiki, HR docs, engineering runbooks.

Runs on Slack, MS Teams, or a private web app.

TYPE-02

Customer Support Bot

Answers L1 tickets from your product docs and past resolved conversations. Hands off to a human when confidence drops. Cuts ticket volume 40-60%.

Sits inside Zendesk, Freshdesk, Intercom, or standalone.

TYPE-03

WhatsApp AI Bot

A conversational agent on WhatsApp Business API. Answers, takes actions, hands over to human. VakeelSaathi's WhatsApp bot is in production. So is BookMySMS's messaging layer.

Session management + template messaging handled.

TYPE-04

Document Q&A

Upload a 500-page contract, RFP, or regulation. Ask questions. Get answers with paragraph citations. Great for legal, compliance, and procurement teams.

PDFs, Word, Excel, scanned docs (with OCR).

TYPE-05

Sales & Product Assistant

On your website. Answers pricing, feature, and comparison questions from your product docs. Books demos. Qualifies leads. Feeds them to your CRM.

Web widget with your brand, embedded in one line.

TYPE-06 PRIVATE

Private ChatGPT for Your Team

A ChatGPT-style interface deployed in your VPC or on-prem. Nothing leaves your walls. Backed by Llama, Mistral, or an Azure OpenAI private endpoint.

SSO, audit logs, role-based access included.

FILE 04 / PROCESS & PRICING

From idea to live users in 6-9 weeks.

Priced by phase. You know what you're paying for before we start.

FREE

Discovery · Week 1

Two calls. We look at your data, users, guardrails. Written feasibility doc.

₹1.5-3L

Prototype · Weeks 2-3

Working RAG bot on 500-2,000 of your actual docs. You test it. Two model options compared.

₹6-15L

Production Build · Weeks 4-8

Full data ingestion, integrations, UI, SSO, audit logging, evals, security review, deployment.

₹40k/mo

Operate · Ongoing

Monitoring, cost control, quality evals, content re-indexing, patches. API costs included in fixed slabs. From ₹40k/month.

REF-A Our RAG Stack

GPT-4o / o1 · Claude 3.5 · Gemini 1.5 Pro · Llama 3.1 (self-hosted) · Mistral Large (on-prem) · Pinecone · Weaviate · Qdrant · pgvector · Chroma / FAISS · LangChain / LangGraph · LlamaIndex · FastAPI · Ragas · Langfuse · AWS Mumbai · Azure India · GCP Mumbai · On-prem GPU (VPC) · Docker / K8s

We recommend the stack in the prototype phase and lock it in with you before production build. If your infra team already runs Kubernetes, Postgres, or a specific cloud. We work inside it. No forced migrations.

FILE 06 / FIELD MANUAL — FAQ

Questions we hear on almost every call.

What is a RAG chatbot?
A RAG chatbot (Retrieval-Augmented Generation) answers questions using your documents rather than the model's generic training data. Before generating a reply, the system searches an index of your content, retrieves the most relevant pieces, and gives them to the language model as context. The model can only answer from what you provided. If the information isn't in your documents, the bot says so instead of making something up.
How is a RAG chatbot different from ChatGPT?
ChatGPT answers from its general training data, which stops at a cutoff date and knows nothing about your company. A RAG chatbot answers from your documents, updated whenever you update the source. ChatGPT hallucinates when it doesn't know something. A RAG chatbot cites the source paragraph it used, so you can verify the answer.
How much does a RAG chatbot cost to build in India?
Prototype phase is ₹1.5-3 lakh depending on data volume and integrations. Full production build is ₹6-15 lakh. Ongoing operations start at ₹40,000/month and include model API costs, monitoring, quality evals, and content re-indexing. Feasibility call is free.
How long does it take to build a chatbot?
A working prototype on your data takes 2-3 weeks. Production build takes 4-6 weeks after that. Total: 6-9 weeks from kickoff to live users. WhatsApp integration or multilingual support adds 1-2 weeks.
Can the chatbot work in Hindi or other Indian languages?
Yes. VakeelSaathi's legal drafting works in 8 Indian languages including Hindi, Marathi, Tamil, Bengali, Telugu, Kannada, Malayalam, and Gujarati. For your use case, we test multilingual models on a sample of your data first. No one model wins everywhere in Indian languages.
Where does the data stay?
Your choice. We deploy on AWS Mumbai, Azure India, or self-hosted GPU inside your VPC. For sensitive data, we use on-prem Llama or Mistral so nothing leaves your infrastructure. When we use OpenAI or Claude, we sign a zero-data-retention agreement. Your data is never used to train their models.
How do you stop the chatbot from hallucinating?
Three layers. First, RAG grounds every answer in retrieved source chunks. The model can only quote what we gave it. Second, we run automated evals on real user questions to catch drift. Third, we set a confidence threshold. Below it, the bot says "I don't know" or routes to a human. Zero hallucination isn't a marketing claim, it's how we shipped VakeelSaathi's legal research.
Can the chatbot go on WhatsApp?
Yes. We handle the WhatsApp Business API integration, session management, and message templates. VakeelSaathi has a WhatsApp bot in production. BookMySMS (our messaging product) handles the delivery layer.

Want a chatbot that actually knows your business?

Ask Deci what you'd want the bot to do, or use the contact form. We'll come back with the stack, timeline, and a fixed prototype price.