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

M-Stats
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M-Stats is a consultancy focused on data analysis. Harness the power of your data through our Data Services. Allow your data to reveal its narrative, and together we can generate significant insights to pave the way for a better tomorrow. Step into a realm of limitless possibilities, where data serv
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Tetouan, Ma
Services Provided+6 Services
7% Generative AI
5% AI Strategy & Roadmap Consulting
15% BI & Big Data Consulting & SI
7% LLM Integration & Prompt Engineering
AI Summary
“M-Stats is a data consultancy specializing in analysis and data services, unlocking insights from client data to drive informed decisions and future growth opportunities.”
Hexaview Technologies
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Hexaview Technologies is a digital transformation company that offers premium products and solutions to clients, including prominent companies in the global tech sector. We focus on the design, development, and implementation of sophisticated data and software solutions, utilizing cutting-edge techn
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
New York, New York, Us
Services Provided+22 Services
2% ECM Consulting and SI
3% Robotic Process Automation (RPA)
3% Computer Vision Solutions
3% Generative AI
AI Summary
“Hexaview Technologies delivers advanced digital transformation solutions, leveraging expertise in Salesforce, Cloud, AI, NLP, and ML to meet critical business needs globally.”
TOPCONE INC
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Topcone is a software solutions provider located in California. Our primary goal is to deliver customized enterprise solutions, modernize outdated software, automate and integrate systems, and offer development resources to support in-house teams. Our bespoke ERP solution has a solid history of assi
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Los Angeles, California, Us
Services Provided+11 Services
5% Mobile App Development (iOS & Android)
6% E-Commerce Development
4% Legacy System Modernization
5% Custom Web Application Development
AI Summary
“Topcone Inc. offers customized enterprise software solutions, including ERP, data collection, IoT, AI integration, and process automation to optimize operations across diverse industries.”
com2cloud
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**Expertise in AWS Solutions and AI Integration** We specialize in advanced AWS Serverless architecture and AI integration, providing scalable and cost-effective cloud solutions that facilitate business transformation. Our experienced team excels in various areas: Our client-focused strategy empha
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+5 Services
18% Custom Web Application Development
8% API Development & Integration
7% Custom AI Chatbot Development
6% LLM Integration & Prompt Engineering
AI Summary
“com2cloud offers scalable, cost-effective AWS serverless and AI-powered cloud solutions, transforming diverse industries and enhancing business efficiency, scalability, and operational savings.”
Cardiff App Developers
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We are a welcoming and skilled IT solutions company located in South Wales, serving clients throughout the UK and internationally. Our talented team consists of professional designers and programmers proficient in various aspects of IT. Our main goal is to deliver high-quality IT services and soluti
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Cardiff, Wales, Gb
Services Provided+19 Services
3% CMS Development & Customization
8% Backend Development
7% Mobile App Development (iOS & Android)
2% ERP & CRM Development
AI Summary
“Cardiff App Developers is a skilled IT solutions firm in South Wales, delivering high-quality backend and API integration services globally to improve business efficiency and profitability.”
Canvendor
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Canvendor is a provider of technological solutions that specializes in digital transformation, API integration, and automation. By prioritizing innovation and scalability, we assist organizations in optimizing their operations through contemporary engineering, cloud-native systems, and robust archit
Highlights
50-249
Employees
Dublin, Ohio, Us
Services Provided+7 Services
6% Legacy System Modernization
15% API Development & Integration
4% Mobile App Development (iOS & Android)
15% Product UX Strategy
AI Summary
“Canvendor delivers innovative technological solutions specializing in digital transformation, API integration, and automation, enabling organizations to optimize operations through scalable, cloud-native architectures across industries.”
NexEver
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🚀 Elevate your business with NexEver Pvt Ltd – a DUNS-verified global tech firm based in 🇭🇰 Hong Kong and 🇮🇳 India, authorized to operate in both the UAE and Australia. 💡 Our Areas of Expertise: ✅ AI & ML (ChatGPT, Gemini, Claude) ✅ Mobile & Web Application Development ✅ Eye-catching UI/UX Des
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Sahibzada Ajit Singh Nagar, Punjab, In
Services Provided+8 Services
13% Mobile App Development (iOS & Android)
7% Custom Web Application Development
5% SaaS Product Development
10% Product UX Strategy
AI Summary
“NexEver Pvt Ltd is a DUNS-verified global technology firm offering AI-driven solutions, mobile/web app development, customized software, and data analytics, serving diverse industries with innovative, client-focused products.”
Tekrowe
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Tekrowe is a prominent Technology and AI Consulting firm located in Silicon Valley, California. We serve as a reliable technology partner for startups and Fortune 500 companies around the globe. Our team of over 100 specialists in AI, Data, and Web Technologies empowers businesses to innovate and tr
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+29 Services
3% AI Strategy & Roadmap Consulting
2% Workflow Automation (Zapier / Make / n8n)
3% Machine Learning Model Development
1% IT Staff Augmentation
AI Summary
“Tekrowe is a Silicon Valley technology firm offering AI consulting, cloud services, data analytics, and custom software development, enabling scalable, innovative solutions for global enterprises.”
Fluxitron
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Fluxitron — Partner for Foxway Dropshipping API Integration We focus solely on linking e-commerce platforms to Foxway's Dropshipping API. Our team has collaborated with Foxway from the beginning, equipping us with extensive knowledge of every API endpoint, business intricacy, and fulfillment proces
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
18% Custom Web Application Development
1% Blockchain & Web3 Development
6% Mobile App Development (iOS & Android)
3% Machine Learning Model Development
AI Summary
“Fluxitron specializes in integrating e-commerce platforms with Foxway's Dropshipping API, providing scalable solutions for catalog syncing, inventory, order processing, and EU delivery tracking.”
Alsetsoft
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Alsetsoft offers innovative solutions for the E-commerce, Medical, Retail, IoT, and AI sectors. We focus on delivering results rather than just hours worked. Submit a request for leave and receive a complimentary Discovery Phase and Case Analysis.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
10% Machine Learning Model Development
5% Custom AI Chatbot Development
5% Cloud Consulting & SI
8% AI Strategy & Roadmap Consulting
AI Summary
“Alsetsoft provides innovative solutions across E-commerce, Medical, Retail, IoT, and AI sectors, emphasizing results-driven approaches and complimentary discovery and analysis services.”

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Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

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