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

BlueBlvckX
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BlueBlvckX is a specialized AI and engineering studio that serves as an innovation partner rather than a conventional order-taking agency. It emphasizes the development of intelligent systems, scalable backend architectures, and comprehensive products that yield tangible business results rather than
Highlights
10-49
Employees
Services Provided+9 Services
12% Custom Web Application Development
5% Mobile App Development (iOS & Android)
13% API Development & Integration
3% E-Commerce Development
AI Summary
“BlueBlvckX is an AI and engineering studio delivering scalable, intelligent systems and products that drive tangible business outcomes for startups and enterprises, leveraging over nine years of expertise.”
Growlyze
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We have a thorough understanding of your business requirements, inefficiencies, and priorities. We create AI-driven revenue systems, deploy the most effective AI technology, automate processes, and develop tailored AI solutions that scale, enhance EBITDA, and deliver significant business outcomes.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Mangerton, Au
Services Provided+12 Services
5% LLM Integration & Prompt Engineering
4% Workflow Automation (Zapier / Make / n8n)
2% CRM Consulting and SI
3% AI Strategy & Roadmap Consulting
AI Summary
“Growlyze specializes in AI-driven revenue systems and tailored automation solutions that enhance business efficiency, scalability, and EBITDA, delivering impactful outcomes aligned with client priorities.”
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VANCOD
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VANCOD is a technology solutions firm that specializes in advanced software development, particularly in the realm of artificial intelligence and innovative digital solutions. Established to provide exceptional AI experiences, the company caters to clients around the world using a remote team model.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
8% AI Strategy & Roadmap Consulting
5% LLM Integration & Prompt Engineering
10% Generative AI
8% AI Agent & Multi-Agent System Development
AI Summary
“VANCOD is a global technology solutions firm specializing in advanced AI-driven software development and innovative digital services, delivering exceptional solutions through a remote expert team.”
Symbionix
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Technology Solutions for Healthcare and Finance
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Sandton, Za
Services Provided+8 Services
15% Mobile App Development (iOS & Android)
10% Custom Web Application Development
12% DevOps Engineering
7% IT Helpdesk & Support Services
AI Summary
“Symbionix delivers advanced technology solutions across healthcare and finance sectors, enhancing operational efficiency and innovation through specialized software and digital services.”
Epik Systems
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In both startups and new initiatives within established organizations, we recognize that the opportunity for innovation and problem-solving is often brief, making speed crucial. Epik offers the technological skills necessary for swift software development, as well as the industry knowledge needed to
Highlights
$50,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Carlsbad, California, Us
Services Provided+18 Services
3% AI Strategy & Roadmap Consulting
2% LLM Integration & Prompt Engineering
2% Custom AI Chatbot Development
2% Machine Learning Model Development
AI Summary
“Epik Systems specializes in rapid software development and industry-informed solutions, enabling startups and organizations to innovate and implement effective technologies swiftly and efficiently.”
Haider Technologies
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Founded in 2020, Haider Technologies is a forward-thinking software development company that offers IT services including website development, mobile application development, and graphic design. With more than a decade of industry experience and a skilled team of developers, the company has successf
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+10 Services
13% Mobile App Development (iOS & Android)
5% E-Commerce Development
8% Backend Development
7% Frontend Development
AI Summary
“Founded in 2020, Haider Technologies is a software development company specializing in website, mobile app development, and graphic design, backed by experienced professionals delivering diverse IT solutions.”
Botpro Solutions
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We are proud to be a premier provider of comprehensive IT services. Our team of highly experienced professionals delivers exceptional solutions tailored to the specific needs of our clients. What We Do: At Botpro Solutions, we are committed to offering innovative IT solutions that help businesses
Highlights
50-249
Employees
Rajkot, Gujarat, In
Services Provided+18 Services
6% Custom Web Application Development
5% E-Commerce Development
4% Frontend Development
4% Backend Development
AI Summary
“Botpro Solutions delivers innovative IT services including software development, AI/ML, DevOps, and e-commerce, leveraging diverse expertise to tailor solutions that drive business growth.”
Jetbro Private Limited
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At Jetbro, we focus on providing high-quality digital solutions customized to fit your business requirements. Whether you need to hire dedicated developers, agile teams, or comprehensive project-based services, we have you covered. Our expertise encompasses a broad array of open-source technology st
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+13 Services
8% Backend Development
6% API Development & Integration
1% E-Commerce Development
3% QA & Software Testing
AI Summary
“Jetbro Private Limited delivers custom digital solutions and backend integrations, specializing in open-source technologies, CRM development, and data analytics to enhance business efficiency and growth.”
Kogito IT Services Pvt Ltd
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Kogito IT Services offers IT consulting and software development solutions. Based in the UK, the company boasts a global workforce of over 100 IT professionals delivering personalized services. Most of our clients are located in the UK and the USA, where we collaborate directly with them to provide
Highlights
$1,000+
Min Project Size
50-249
Employees
Kolkata, West Bengal, In
Services Provided+6 Services
8% E-Commerce Development
10% Mobile App Development (iOS & Android)
7% API Development & Integration
10% AI Strategy & Roadmap Consulting
AI Summary
“Kogito IT Services Pvt Ltd provides tailored IT consulting and software development with a global team, delivering solutions from India and EU centers to clients in over 30 countries.”
Purpledrops AI Private Limited
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At Purpledrops AI Pvt. Ltd., we are committed to developing smart, scalable, and future-oriented software solutions by leveraging the transformative capabilities of Artificial Intelligence and Blockchain technology. Our focus is on providing high-performance systems that revolutionize business opera
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
7% API Development & Integration
16% Custom Web Application Development
10% Mobile App Development (iOS & Android)
7% AI Strategy & Roadmap Consulting
AI Summary
“Purpledrops AI Pvt. Ltd. develops advanced AI and blockchain software solutions, delivering innovative, secure, and scalable systems that enhance business operations and drive digital transformation.”

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Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

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