Top LLM Integration & Prompt Engineering Companies

LLM integration and prompt engineering is the work of putting a large language model, such as GPT, Claude, Gemini or Llama, inside an existing product or workflow so that it answers correctly from your own data. The firms build retrieval-augmented generation (RAG) over documents and databases, write and version the prompts, connect the model to tools and APIs, and set up evaluations and guardrails that catch wrong or unsafe output. Companies hire them when a chatbot demo works but fails on real questions, or when support, sales or operations teams want AI features in tools they already use.

Compare the firms here on shipped production features rather than demos, how they measure answer quality, and how they handle data privacy.

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2,741 Companies

List of the Best LLM Integration & Prompt Engineering Agencies

Matthew Clarkson
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I'm a marketing technology expert located in Brisbane, Australia. With extensive experience in marketing, software development, data analysis, and advisory roles, I also serve as a mentor, AI speaker, founder, athlete, and parent. Unlike many marketers who simply discuss hacking, I actively engage i
Highlights
$5,000+
Min Project Size
Services Provided
40% AI Strategy & Roadmap Consulting
30% LLM Integration & Prompt Engineering
15% Custom AI Chatbot Development
15% Machine Learning Model Development
AI Summary
“Matthew Clarkson is a Brisbane-based marketing technology expert combining software development, data analysis, and advisory skills, actively engaging in marketing innovation, mentorship, and AI advocacy.”
Srishti GenAI
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Srishti GenAI, based in Bengaluru, is a technology services company that focuses on enterprise-level Generative AI and custom software development. Established in 2025 by Ashok Bugude, an IIT Bombay graduate with over 13 years of experience in software engineering, we assist businesses in transition
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
25% LLM Integration & Prompt Engineering
10% Custom AI Chatbot Development
10% AI Strategy & Roadmap Consulting
40% AI Agent & Multi-Agent System Development
AI Summary
“Srishti GenAI delivers enterprise-grade Generative AI and custom software solutions, integrating advanced AI, cloud, and cybersecurity technologies to help regulated sector clients scale and innovate securely.”
Symphony Solutions
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We are an AI-first software partner with engineering expertise in Cloud and Data. Based in the Netherlands, with delivery centers in Ukraine, North Macedonia, Poland, and Nigeria, we design, develop, and enhance production-grade systems for various industries. Since our inception in 2008, our team h
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Amsterdam, North Holland, Nl
Services Provided+2 Services
18% LLM Integration & Prompt Engineering
17% Cloud Consulting & SI
10% BI & Big Data Consulting & SI
5% AI Strategy & Roadmap Consulting
AI Summary
“Symphony Solutions is an AI-driven software partner specializing in cloud and data engineering, delivering secure, scalable solutions globally with over 350 experts since 2008.”
Deevo Analytics
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As a Natural Language Processing (NLP) company, our main goal is to develop and implement NLP solutions that enhance decision-making in sectors such as fintech, e-commerce, and healthcare. We analyze social media posts, surveys, and customer feedback to gauge what clients are saying about banks. By
Highlights
$250,000+
Min Project Size
$150+/hr
Avg Hourly Rate
10-49
Employees
Riyadh, Riyadh, Sa
Services Provided+1 Services
15% AI Strategy & Roadmap Consulting
25% LLM Integration & Prompt Engineering
15% Custom AI Chatbot Development
20% Machine Learning Model Development
AI Summary
“Deevo Analytics specializes in NLP solutions that analyze social data across fintech, e-commerce, and healthcare to enhance decision-making, customer insights, and strategic growth.”
MVP Builders
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MVP Builders help entrepreneurs attain their objectives by offering rapid construction, affordable pricing, and exceptional build quality. How do we accomplish this? By automating the repetitive aspects of software development, we can focus on enhancing the quality and unique features of your produc
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Buenos Aires, Buenos Aires, Ar
Services Provided+4 Services
15% Custom Web Application Development
12% API Development & Integration
7% SaaS Product Development
23% Product UX Strategy
AI Summary
“MVP Builders accelerates software development for entrepreneurs by automating repetitive tasks, delivering affordable, high-quality products while enhancing unique design features and competitive advantage.”
AI Adoption Strategy
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The AI Adoption Strategy assists professional services firms in transitioning from evaluating AI to implementing it through a well-defined strategy, practical support, and appropriate resources. We aid leaders in identifying the appropriate uses for AI, understanding where it may not fit, and determ
Highlights
$10,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Services Provided
55% AI Strategy & Roadmap Consulting
25% Custom AI Chatbot Development
20% LLM Integration & Prompt Engineering
AI Summary
“AI Adoption Strategy enables professional services firms to transition from AI evaluation to implementation through strategic planning, governance, training, and tailored AI solutions, emphasizing quality and compliance.”
CloseFuture
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CloseFuture is a leading AI product studio that helps businesses and startups rapidly and cost-effectively transform their ideas into reality. Depending on the specifics of each project, we primarily utilize tools such as Claude Code, FlutterFlow, Supabase, Replit, Lovable, Bubble, and Framer to bui
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided+3 Services
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
5% API Development & Integration
20% Custom AI Chatbot Development
AI Summary
“CloseFuture is an AI product studio that rapidly transforms business ideas into functional products using advanced platforms, aligning strategy, building solutions, and supporting market growth through continuous improvement.”
Aviara Labs
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Aviara Labs is an AI software firm that develops enterprise platforms designed to automate workflows that rely heavily on documents. The company specializes in leveraging AI and natural language processing for contracts, proposals, and financial documents to enhance operational efficiency and facili
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Noida, Uttar Pradesh, In
Services Provided+1 Services
10% AI Strategy & Roadmap Consulting
20% LLM Integration & Prompt Engineering
15% Generative AI
10% Custom AI Chatbot Development
AI Summary
“Aviara Labs develops AI-powered enterprise platforms to automate document-centric workflows, offering solutions in contract management, proposal automation, financial document processing, and AI integration.”
Whales
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Development of chatbots, artificial intelligence, automation, and optimization of workflows, among other things.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
30% AI Strategy & Roadmap Consulting
30% LLM Integration & Prompt Engineering
40% Generative AI
AI Summary
“Whales specializes in developing chatbots, artificial intelligence solutions, workflow automation, and operational optimization to enhance business efficiency across various sectors.”
Retoba Lab
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Retoba creates conversational AI personas and enterprise-level chatbots that provide brands with a uniform voice and measurable impact in conversations. We integrate prompt engineering, advanced language models, conversational design, and structural information engineering to develop AI assistants t
Highlights
$25,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Ljubljana, Si
Services Provided+1 Services
15% AI Strategy & Roadmap Consulting
25% LLM Integration & Prompt Engineering
30% Custom AI Chatbot Development
10% Machine Learning Model Development
AI Summary
“Retoba Lab develops AI-driven conversational personas and chatbots to enhance brand communication, delivering measurable business impact and strategic insights through advanced language technologies.”

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Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

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