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

CometForge
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CometForge is an agile tech firm focused on advanced software services and innovative products. We specialize in developing scalable solutions such as website design, e-commerce systems, AI/ML integrations, and customized SaaS applications. Committed to outstanding quality, our team equips businesse
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+5 Services
10% Mobile App Development (iOS & Android)
18% Custom Web Application Development
8% API Development & Integration
15% SaaS Product Development
AI Summary
“CometForge is a dynamic technology company delivering advanced software services and innovative, scalable solutions including AI, e-commerce, and custom SaaS applications to drive business growth and innovation.”
DivIniSoft
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At DivIniSoft, we have served as a reliable technology partner for numerous small and large businesses in the US and Europe for over a decade. We recognize the distinct challenges that organizations encounter when it comes to efficiently building, scaling, and managing IT projects. Our expertise lie
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
33% Mobile App Development (iOS & Android)
33% UX Research & Usability Testing
4% Generative AI
3% Custom AI Chatbot Development
AI Summary
“DivIniSoft delivers comprehensive IT services—including product development, AI/ML, DevOps, cloud migration, testing, and staff augmentation—to support businesses in the US and Europe efficiently scaling IT projects.”
Manyone
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Manyone is a strategic design consultancy that has been assisting global brands in their transformations since 2019. We focus on reimagining businesses and crafting innovative experiences, products, and services by integrating strategy, creativity, and technology. Every day, our team of over 250 str
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
250-999
Employees
Copenhagen, Capital Region Of Denmark, Dk
Services Provided+9 Services
9% AI Strategy & Roadmap Consulting
6% LLM Integration & Prompt Engineering
6% Custom AI Chatbot Development
4% AI Agent & Multi-Agent System Development
AI Summary
“Manyone is a strategic design consultancy with over 250 experts across 16 locations, delivering innovative business transformations through integrated strategy, creativity, and technology since 2019.”
Vibe6 Digital
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About Us: Vibe6 Digital is an innovative technology firm focused on Blockchain, AI, Web3, IoT, and bespoke software development. We assist companies in driving innovation and growth by providing advanced digital solutions customized to their specific requirements. Industries We Serve: We support bus
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Indore, Madhya Pradesh, In
Services Provided+14 Services
7% Mobile App Development (iOS & Android)
8% Custom Web Application Development
15% Blockchain & Web3 Development
3% Legacy System Modernization
AI Summary
“Vibe6 Digital is a technology firm specializing in Blockchain, AI, Web3, IoT, and custom software development, delivering innovative digital solutions to diverse industries for growth and innovation.”
getDev.io
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Our company possesses extensive experience in managing projects for small to medium-sized enterprises. Whether your goal is to obtain contracts, showcase your services, or create a large online marketplace, we can help you achieve your objectives! Our technical skills include HTML, CSS3, PHP, jQuery
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Budapest, Budapest, Hu
Services Provided+13 Services
10% Mobile App Development (iOS & Android)
4% E-Commerce Development
2% Legacy System Modernization
4% QA & Software Testing
AI Summary
“getDev.io delivers comprehensive project management and development services for SMEs, specializing in web technologies, blockchain, and mobile applications with clear stakeholder communication.”
Web Experience
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WebExperience es una agencia digital que se especializa en proporcionar soluciones tecnológicas que integran diseño, funcionalidad y eficiencia. Transformamos ideas en herramientas concretas que ayudan a impulsar negocios en el ámbito digital, siempre con un enfoque estratégico y centrado en las nec
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+5 Services
17% Custom Web Application Development
8% API Development & Integration
8% Backend Development
13% UX Research & Usability Testing
AI Summary
“WebExperience is a digital agency delivering tailored web design, development, automation, and AI solutions, integrating creativity and technology to enhance business growth and operational efficiency.”
TechnoTaau - Digital Solutions for Local Businesses
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At TechnoTaau, we focus on AI-enhanced digital marketing solutions aimed at empowering local businesses. Since 2014, we have dedicated ourselves to turning digital challenges into opportunities for growth by integrating cutting-edge technology with human insight. Our name, "Taau," which is derived f
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Chandigarh, Chandigarh, In
Services Provided+10 Services
7% AI Strategy & Roadmap Consulting
6% LLM Integration & Prompt Engineering
4% Generative AI
8% Brand Identity Design
AI Summary
“TechnoTaau delivers AI-powered digital marketing and transformation services tailored to local businesses, combining advanced technology and data-driven strategies to enhance growth and online presence since 2014.”
MLdatahouse
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We assist organizations in transforming data and automation into quantifiable business results. MLDataHouse is a data science and AI company located in Islamabad, boasting five years of experience and a team of over 20 engineers and data scientists. We develop production-ready machine learning syste
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
4% AI Agent & Multi-Agent System Development
14% Machine Learning Model Development
5% LLM Integration & Prompt Engineering
3% Custom AI Chatbot Development
AI Summary
“MLDataHouse, based in Islamabad, specializes in data science and AI, delivering production-ready machine learning systems and automation to solve business challenges and reduce manual effort.”
DotDevz Consulting
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DotDevz Consulting is a leading provider of IT and digital solutions, with offices in the USA and India. We focus on offering comprehensive services such as website development, mobile app development, AI/ML solutions, natural language processing, blockchain technology, and augmented/virtual reality
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
4% AI Strategy & Roadmap Consulting
4% LLM Integration & Prompt Engineering
4% Custom AI Chatbot Development
4% Machine Learning Model Development
AI Summary
“DotDevz Consulting delivers comprehensive IT and digital solutions—including app development, AI/ML, blockchain, and digital marketing—to empower business growth and enhance user experiences globally.”
LINJERUM agency
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Linjerum Agency is a boutique software studio located in Aarhus, Denmark. We create tailored websites, web applications, and digital solutions, offering services that range from technical consulting and architecture evaluations to design, user experience, and event marketing resources. We don’t use
Highlights
$100-149/hr
Avg Hourly Rate
Services Provided+5 Services
15% Custom Web Application Development
8% API Development & Integration
3% E-Commerce Development
6% Custom AI Chatbot Development
AI Summary
“Linjerum Agency is a Danish boutique software studio specializing in custom websites, web applications, and digital solutions, delivering tailored design, consulting, and marketing with transparent pricing and full client ownership.”

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Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

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