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.

How this list is built

We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

2,741 Companies

List of the Best LLM Integration & Prompt Engineering Agencies

M
Mindberry AI
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Welcome to MindBerry.ai, your premier partner in AI consulting. Leveraging our extensive knowledge and cutting-edge solutions, we tap into the capabilities of artificial intelligence to help your business reach its maximum potential. Whether you're a start-up or a Fortune 500 company, we have succes
Highlights
$25,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Ottawa, Ontario, Ca
Services Provided
50% AI Strategy & Roadmap Consulting
20% LLM Integration & Prompt Engineering
30% Generative AI
AI Summary
“MindBerry.ai offers expert AI consulting services, enabling businesses across industries to enhance efficiency, leverage data-driven insights, and achieve significant operational improvements.”
Develative
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are Develative LLC, specializing in assisting US-based SaaS companies in locating the ideal software engineering talent to support growth and foster innovation. By partnering with us, you will: - Reduce your hiring timeline from months to weeks. - Gain access to a dependable, skilled, and consist
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Austin, Texas, Us
Services Provided+1 Services
10% AI Agent & Multi-Agent System Development
10% AI Strategy & Roadmap Consulting
10% LLM Integration & Prompt Engineering
10% Custom AI Chatbot Development
AI Summary
“Develative LLC connects US SaaS companies with top Latin American software engineers, accelerating hiring and delivering skilled, cost-effective teams operating in matching time zones with 24/7 support.”
Vstorm (Leading AI Agent Company)
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Vstorm assists mid-market challengers in their transition to Agentic AI, enabling them to outperform competitors and streamline business processes with the established TriStorm Agentic AI delivery framework. The company provides a reliable return on investment thanks to the practical implementation
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Wroclaw, Lower Silesian, Pl
Services Provided+4 Services
10% AI Strategy & Roadmap Consulting
15% LLM Integration & Prompt Engineering
13% Custom AI Chatbot Development
7% Machine Learning Model Development
AI Summary
“Vstorm empowers mid-market businesses to excel by deploying Agentic AI solutions through its TriStorm framework, leveraging expert teams to enhance efficiency and competitive advantage.”
Sunvera Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
What do you wish to create? SunVera Software transforms your ideas into dynamic, functional applications. Whether you need a mobile app, a web application, or a comprehensive enterprise platform, SunVera is here to help you achieve it.
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Irvine, California, Us
Services Provided+1 Services
50% Mobile App Development (iOS & Android)
13% AI Strategy & Roadmap Consulting
13% LLM Integration & Prompt Engineering
12% Machine Learning Model Development
AI Summary
“SunVera Software specializes in developing customized mobile apps, web applications, and enterprise platforms, transforming ideas into effective, dynamic software solutions for diverse business needs.”
Applied Data Science Partners
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Applied Data Science Partners (ADSP) is a consultancy located in London, specializing in AI, data science, and engineering. We focus on executing intricate, multi-phase data transformation initiatives, particularly in the realm of generative AI. By partnering with us, you can anticipate exceptional
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+2 Services
15% AI Strategy & Roadmap Consulting
20% LLM Integration & Prompt Engineering
15% Custom AI Chatbot Development
20% Machine Learning Model Development
AI Summary
“Applied Data Science Partners, a London consultancy, specializes in AI, data science, and complex data transformation projects, delivering expert generative AI solutions through proven methodologies.”
Spiraltech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Spiral Tech offers a comprehensive suite of services to enhance your brand's digital presence. We design engaging and responsive websites that act as your online storefronts, attracting visitors and transforming them into dedicated customers. Our team turns concepts into reality with interactive, us
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Gujranwala, Pk Punjab, Pk
Services Provided+1 Services
23% Custom Web Application Development
22% Mobile App Development (iOS & Android)
5% E-Commerce Development
30% Machine Learning Model Development
AI Summary
“Spiraltech specializes in web development, mobile app creation, and digital marketing, delivering tailored digital solutions that enhance brand visibility, user engagement, and business growth.”
codequest
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
About Us: codequest is an AI-powered software studio located in Warsaw, Poland. Established in 2009, our dedicated team of engineers, designers, and data scientists work together to develop quick, efficient, and visually appealing digital products, all fueled by advanced technology and a focus on us
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided+1 Services
35% Custom Web Application Development
15% Mobile App Development (iOS & Android)
20% Generative AI
18% AI Strategy & Roadmap Consulting
AI Summary
“Codequest, based in Warsaw since 2009, is an AI-driven software studio specializing in innovative, efficient digital products through expert engineering, design, and data science with user-centered focus.”
XPG Factor
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
XPG Factor serves as a worldwide technology partner for companies in North America, Europe, and the Middle East, emphasizing the provision of top-notch autonomous AI agents and customized software solutions. Since 2008, we have leveraged the capabilities of Large Language Models to create innovative
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Warszawa, Masovian, Pl
Services Provided+1 Services
38% Custom Web Application Development
13% API Development & Integration
25% Custom AI Chatbot Development
17% LLM Integration & Prompt Engineering
AI Summary
“XPG Factor is a global technology partner specializing in autonomous AI agents and tailored software solutions, leveraging Large Language Models since 2008 for advanced process automation and data analytics.”
CodeNoise
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Enhance your development team and speed up your business! CodeNoise is a San Diego-based agency focused on web and server development that specializes in:
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
San Diego, California, Us
Services Provided+1 Services
35% Custom Web Application Development
15% Mobile App Development (iOS & Android)
20% Machine Learning Model Development
15% Custom AI Chatbot Development
AI Summary
“CodeNoise is a San Diego-based agency specializing in web and server development, enhancing development teams to accelerate business growth with expert solutions.”
Vitru AI Consulting
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
VITRU is a consulting firm focused on artificial intelligence, specializing in computer vision, database engineering, and natural language processing (NLP) solutions tailored for the healthcare, sports, and clean energy sectors. We excel in some of the most advanced technologies currently shaping th
Highlights
$250,000+
Min Project Size
$150+/hr
Avg Hourly Rate
10-49
Employees
Irvine, California, Us
Services Provided+1 Services
20% Machine Learning Model Development
18% LLM Integration & Prompt Engineering
12% AI Strategy & Roadmap Consulting
30% Custom Web Application Development
AI Summary
“Vitru AI Consulting delivers advanced AI-driven solutions in computer vision, NLP, and database engineering across healthcare, sports, and clean energy, guiding clients from strategy to innovative product launch.”

...

...

...

Latest insights & expert perspectives

Explore data-backed surveys with inputs from top industry experts.

Stated minimum project sizes among the firms listed under software development services on Edverise, with the $50,000 band shaded

Vendor Selection

Questions to Ask a Software Development Agency: Six With Proof

A vetting script for second-round agency calls: six questions, the document each answer has to produce, and what a directory listing or a badge really proves.

Nihar Ranjan Rout

10/31/2026

Three software development quotes of $38,000, $94,000 and $210,000 converted to effective hourly rates of $79, $73 and $87.50

Vendor Selection

How to Compare Software Development Quotes Priced 5x Apart

Three bids for the same build are rarely comparable as written. A normalization checklist, a weighted grid adapted from FAR Part 15.3, and the hourly arithmetic.

Akash Mohapatra

10/31/2026

Chart of minimum project size stated by firms listed under AI agent development on Edverise, with the $50,000 band highlighted

Vendor Selection

AI Agent Development Cost: Build, Tokens, Reliability

An AI agent has three costs. Compute the monthly token bill from published list prices, then set the build quote against what listed firms actually charge.

Santanu Prasad Sahoo

10/31/2026

Check All Our Blogs

One Platform. One Promise. One Trust.

Edverise is building the trusted way to find tech vendors. List your company early, or talk to us about backing the platform.

Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

M

Where buyers look next

Latest insights & expert perspectives

Questions to Ask a Software Development Agency: Six With Proof

How to Compare Software Development Quotes Priced 5x Apart

AI Agent Development Cost: Build, Tokens, Reliability

One Platform. One Promise. One Trust.