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

FlashDev AI
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FlashDev AI focuses on No Code AI development, offering customized solutions for Bubble apps, SaaS applications, and chatbots. Whether you’re launching a new project or enhancing your current systems, we deliver smart, flexible solutions tailored to your specific requirements. With a dedication to q
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Ivankiv, Ua
Services Provided
20% AI Strategy & Roadmap Consulting
30% LLM Integration & Prompt Engineering
50% Custom AI Chatbot Development
AI Summary
“FlashDev AI specializes in no-code AI solutions, delivering customized development for Bubble apps, SaaS, and chatbots to enhance business functionality and support digital transformation.”
Tech Soft Consultants
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**Tech Soft Consultants — Experts in AI Development and Integration** Tech Soft Consultants creates effective and scalable AI solutions that enhance operations and promote growth. Our expertise includes AI integration, GPT-driven systems, AI agents, AI automation, and n8n workflow automation, trans
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Islamabad, Pk
Services Provided+2 Services
25% Custom AI Chatbot Development
10% Conversational AI & Voice Assistant Development
25% LLM Integration & Prompt Engineering
20% AI Agent & Multi-Agent System Development
AI Summary
“Tech Soft Consultants specializes in scalable AI solutions, including GPT integration, AI agents, and automation, serving diverse industries with strategic, outcome-driven AI development and implementation.”
OrganicRankings.com
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OrganicRankings.com is a results-oriented digital marketing and web development agency dedicated to enhancing businesses' online visibility through SEO, AI-driven tactics, and tailored software solutions. With more than 28 years of experience, our team focuses on boosting visibility, traffic, and co
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+2 Services
15% Custom Web Application Development
8% Mobile App Development (iOS & Android)
10% SaaS Product Development
27% Search Engine Optimization (SEO)
AI Summary
“OrganicRankings.com is a digital marketing and web development agency offering SEO, AI integration, custom software, and SaaS products to enhance online visibility and operational efficiency across industries.”
Senseloom
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Senseloom was established to assist companies in optimizing their data management, enhancing their decision-making processes, and delivering tailored experiences to customers through advanced AI technologies.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% AI Strategy & Roadmap Consulting
30% LLM Integration & Prompt Engineering
25% Backend Development
25% Frontend Development
AI Summary
“Senseloom specializes in leveraging advanced AI technologies to optimize data management, improve decision-making, and provide customized customer experiences for businesses.”
Ai Applied
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Begin your journey toward enhanced efficiency through AI with Ai Applied's Generative AI Integration Service. Take advantage of our FREE one-week Integration Assessment to unlock the potential of AI within your organization. Experience the transformative power of AI in both internal and external ope
Highlights
$10,000+
Min Project Size
2-9
Employees
Brampton, Ontario, Ca
Services Provided+1 Services
35% Generative AI
10% AI Strategy & Roadmap Consulting
15% Custom AI Chatbot Development
30% LLM Integration & Prompt Engineering
AI Summary
“Ai Applied delivers custom generative AI solutions that optimize internal workflows and enhance customer interactions, boosting organizational productivity and engagement through seamless AI integration.”
IIH Global
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IIH Global – Tailored AI, Web, Software & Mobile Application Development Firm IIH Global is a reliable provider of custom software and AI development services for startups, small and medium-sized enterprises, and large corporations, assisting them in creating scalable digital products.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Hertfordshire, England, Gb
Services Provided+11 Services
8% Custom Web Application Development
4% Mobile App Development (iOS & Android)
6% SaaS Product Development
4% Backend Development
AI Summary
“IIH Global specializes in custom software, AI, and web/mobile application development, delivering scalable, client-focused digital solutions across industries with expertise in modern technologies and agile practices.”
SERP WIZARD - Best Digital Marketing Agency in Jaipur
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SERP WIZARD is a 360° AI-powered digital growth agency based in Jaipur, India, helping businesses build stronger online visibility and achieve sustainable growth in an evolving digital landscape. Founded in 2012, we bring over 14 years of experience across SEO, AI Search Optimization, digital mar
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Jaipur, Rajasthan, In
Services Provided+12 Services
5% Mobile App Development (iOS & Android)
5% Custom Web Application Development
8% E-Commerce Development
5% Graphic Design
AI Summary
“No AI summary available for this company yet.”
CYFR Assist
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CYFR Assist is a dedicated staffing partner that links leading AI professionals, including machine learning engineers and LLM trainers, with businesses around the globe. Our aim is to efficiently connect organizations with the right talent to support their AI projects. In addition to staffing servic
Highlights
2-9
Employees
Dar-el-Beida, Ma
Services Provided+1 Services
15% AI Strategy & Roadmap Consulting
30% AI Model Fine-Tuning & Training
10% AI Agent & Multi-Agent System Development
30% LLM Integration & Prompt Engineering
AI Summary
“CYFR Assist specializes in connecting businesses worldwide with expert AI professionals, offering staffing and AI solutions to support and accelerate organizational growth and innovation.”
Step Tech
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StepTech is a results-driven partner in software and digital solutions that assists startups, small and medium-sized businesses (SMBs), and companies in growth stages in creating scalable and impactful technology. We focus on custom software development, rapid conversion-oriented websites, scalable
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Shakopee, Minnesota, Us
Services Provided+3 Services
23% Mobile App Development (iOS & Android)
23% Custom Web Application Development
5% E-Commerce Development
7% Custom AI Chatbot Development
AI Summary
“StepTech delivers tailored software and digital solutions, specializing in scalable custom development, mobile apps, and AI automation to drive growth for startups and SMBs.”
Neurons Lab
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Neurons Lab provides AI transformation services to help businesses transition into the new AI era. Our method encompasses the entire AI landscape, merging leadership alignment with technology integration to achieve tangible results. As an AWS Advanced Partner and holder of the GenAI competency, we h
Highlights
$100,000+
Min Project Size
50-249
Employees
Services Provided
35% AI Strategy & Roadmap Consulting
25% LLM Integration & Prompt Engineering
20% Custom AI Chatbot Development
20% Machine Learning Model Development
AI Summary
“Neurons Lab offers comprehensive AI transformation services, integrating strategy, custom AI solutions, and advanced technologies to empower businesses across industries, including Fortune 500 and government clients.”

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Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

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