Tool

LangChainconsultants & agencies

The most widely used framework for composing LLM applications, from prompt chains to retrieval pipelines. A marker of a firm that builds against model APIs directly rather than wiring no-code tools.

experts: 19; experts
Verified: 9; Verified
industries: 8; industries
agencies / solo: 18/1; agencies / solo

Experts who build on LangChain

#01

Pixelfield

London, United Kingdom

London and Prague product agency building mobile apps, web platforms, games and, more recently, LLM and agent systems. Clutch shows 5.0 from 10 reviews.

Verifiedagency

#02

BotsCrew

San Francisco, United States

Ukrainian-founded AI development firm building custom agents and GPT assistants for mid-market and enterprise clients. US agency CourtAvenue took a controlling stake in February 2025.

Verifiedagency

#03

10Clouds

Warsaw, Poland

10Clouds helps financial institutions run AI-powered operations.

Verifiedagency6

#04

Teamvoy

Lviv, Ukraine

Lviv engineering firm that builds AI agents and LLM features for fintech, insurance and healthcare clients, plus the legacy modernization those systems need.

Verifiedagency

#05

SharkAI Solutions

Chennai, India

Chennai consultancy led by an NLP PhD, building document and invoice processing, demand forecasting, computer-vision quality control and RAG search, with a clear lean toward manufacturing.

Verifiedsolo

#06

Lazer Technologies

Toronto, Canada

Toronto product engineering firm building LLM features, agents and data infrastructure for venture-backed startups and enterprises, with a $50,000 project minimum.

Verifiedagency3

#07

AlphaCorp AI

Rio de Janeiro, Brazil

Small Rio de Janeiro studio building custom AI agents, RAG pipelines and fine-tuned models for US and EU clients, working US Eastern hours.

Verifiedagency

#08

Kelriva AI

London, United Kingdom

London two-founder consultancy building document-processing pipelines, LangGraph agents and data pipelines for finance and ESG teams on published fixed fees from £4,500.

Verifiedagency2

#09

Intellectyx

Pasadena, United States

Pasadena and Denver data and AI engineering firm with an India delivery centre, building agent systems for manufacturers and financial services firms.

Verifiedagency2

#10

EdgeFirm

Karachi, Pakistan

Karachi-built AI engineering firm with a UK entity, shipping RAG apps, agents and WhatsApp bots on fixed-price contracts from $40K, with full code and IP handover.

Listedagency