LangChain & LlamaIndex Development
LangChain and LlamaIndex are popular frameworks for building applications with language models. We use LangChain and LangGraph for agents and multi-step workflows, and LlamaIndex for connecting models to your documents and data in RAG systems.
Frameworks speed up development, but they're not always needed. We use them where they add value and keep the core logic simple, tested and easy to maintain as the frameworks change.
What we offer
- RAG pipelinesDocument loading, indexing and retrieval with LlamaIndex or LangChain.
- AgentsTool-using agents and workflows with LangGraph.
- TracingObservability with LangSmith or alternatives.
- UpgradesKeeping existing LangChain apps current.
- Code reviewSimplifying over-complex framework code.
Common use cases
- Knowledge assistants
- Research agents
- Document Q&A
- Multi-step AI workflows
Technology
- LangChain
- LangGraph
- LlamaIndex
- LangSmith
- Python
- TypeScript
Business benefits
- Faster AI developmentwith proven building blocks for RAG, agents and tools
- Model flexibilityswitch between OpenAI, Claude, Gemini and open-source models
- Agents with memory and toolsusing LangGraph
- Observabilitywith LangSmith for testing and monitoring
Why work with Webtech Evolution
- 10+ years of delivery272+ projects for 118+ clients in 12+ countries since 2014.
- One team, end to enddesign, front end, back end, mobile, QA and DevOps under one roof, so nothing gets lost between vendors.
- Clear estimatesa written scope, timeline and price before work starts, and demos throughout the build.
- You own everythingcode, designs and documentation are handed over in full and covered by an NDA.
- Working hours that overlap with yoursMonday to Friday, 10:00–19:00 IST, with extended hours available for clients in the USA, Canada and New Zealand.
How we deliver
Discovery
agree the goal, users, data and how success will be measured.
Prototype
a working version on real examples within the first weeks.
Build and integrate
connect to your systems, add security, testing and monitoring.
Pilot
launch to a small group, measure results and improve.
Scale and support
roll out widely, with ongoing monitoring and updates.
Need people rather than a project? Hire AI developers.
Frequently asked questions
LlamaIndex is strong for data indexing and retrieval; LangChain and LangGraph are strong for agents and workflows. They can be used together.
Not always. Simple applications can be clearer without one. We recommend based on your project.
Yes. We review, update and stabilise existing LangChain and LlamaIndex projects.
Not always. For simple features we call model APIs directly. LangChain and LangGraph help when you need complex retrieval, multi-step agents or easy model switching.
A LangChain library for building agents as controllable graphs of steps, with memory, retries and human approval points.
Yes. We review prompts, retrieval quality, latency and costs, and add evaluation and monitoring.
Let's Talk!
Have a question about LangChain & LlamaIndex Development? Send us a message and our team will reply with next steps.
- Reply within a few hours (Mon–Fri)
- NDA available
- You own the code
Prefer to talk? Call +91-9601965456WhatsApp ushello@webtech-evolution.com
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