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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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

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Sunai
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Transforming business gradually through digital methods.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
7% AI Strategy & Roadmap Consulting
2% IT Staff Augmentation
5% Custom AI Chatbot Development
2% ECM Consulting and SI
AI Summary
“Sunai specializes in digital transformation, delivering AI solutions, custom software development, and digital marketing services to enhance business performance and online presence.”
Striv
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STRIV assists organizations in overcoming delivery challenges, upgrading technology, and transforming their AI, data, and digital investments into tangible results. We address significant business and technology issues through methodical execution, robust governance, and leadership-driven delivery,
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+28 Services
4% Cloud Consulting & SI
3% Other IT Consulting and SI
3% AI Agent & Multi-Agent System Development
4% Machine Learning Model Development
AI Summary
“STRIV helps organizations overcome delivery challenges by enhancing technology and transforming AI, data, and digital investments into effective solutions through disciplined execution and strong governance.”
Virtusoftech
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We create quick, scalable custom software solutions for emerging startups and small to medium-sized businesses—ranging from internal dashboards to client portals and comprehensive web applications. No unnecessary details—just efficient delivery.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
13% Custom Web Application Development
4% Mobile App Development (iOS & Android)
6% API Development & Integration
3% E-Commerce Development
AI Summary
“Virtusoftech delivers efficient, scalable custom software solutions for startups and SMBs, including dashboards, client portals, and full web applications with practical, streamlined development.”
Brightening Technology Company
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With extensive experience and a wealth of expertise across various technological disciplines, we provide dependable solutions to businesses and individuals efficiently and promptly. Our offerings cover a wide range, from fundamental data management to more advanced engineering services. We take prid
Highlights
10-49
Employees
Services Provided+24 Services
1% Blockchain & Web3 Development
4% Frontend Development
3% CMS Development & Customization
3% Legacy System Modernization
AI Summary
“Brightening Technology Company delivers comprehensive technological solutions across software development, UX/UI design, AI automation, and IT infrastructure, partnering globally to enhance business efficiency and growth.”
Ultimate Software Development IT Consulting
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Consulting and development services in software and artificial intelligence, encompassing application development, generative AI, big data, cloud solutions, ERP, CRM, enterprise and custom software, complex software, cybersecurity, system integration, implementation, transformation, outsourcing, and
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+34 Services
5% Custom Web Application Development
3% Mobile App Development (iOS & Android)
4% API Development & Integration
3% E-Commerce Development
AI Summary
“Ultimate Software Development IT Consulting offers comprehensive software and AI consulting, including application development, big data, cloud, ERP, CRM, cybersecurity, integration, and automation services.”
Infinite Rankers
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Infinite Rankers is an AI-driven Revenue Growth Agency based in Dover, Delaware, dedicated to assisting businesses in the U.S. and around the globe in boosting their revenue through smart automation and data-focused digital marketing. We create automated systems that attract leads, assess prospects,
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+24 Services
5% Workflow Automation (Zapier / Make / n8n)
1% Machine Learning Model Development
4% Custom AI Chatbot Development
1% AI-Powered Document Processing
AI Summary
“Infinite Rankers is a Delaware-based AI-driven agency delivering automated marketing, lead generation, social media, and development services to boost revenue and conversion across industries.”
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Mk Technology Pvt. Ltd.
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At MkTechsol, we are committed to revolutionizing businesses by harnessing the power of technology. Driven by a passion for innovation and a focus on quality, we offer an extensive array of IT solutions and services that enable organizations to succeed in the digital world.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
8% Pay Per Click
9% Search Engine Optimization (SEO)
AI Summary
“Mk Technology Pvt. Ltd. specializes in innovative IT solutions, delivering quality technology services that empower businesses to thrive in the evolving digital landscape.”
Sun Technologies, Inc
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Founded in 1996, Sun Technologies Inc. is recognized as an award-winning leader in innovative IT solutions. The company specializes in Infrastructure Management Services, Gaming Services, Application Development, and Application Testing Services, with particular expertise in storage, virtualization,
Highlights
1000-9999
Employees
Alpharetta, Georgia, Us
Services Provided+18 Services
1% Custom AI Chatbot Development
1% Machine Learning Model Development
3% Cloud Consulting & SI
4% Other IT Consulting and SI
AI Summary
“Sun Technologies Inc., founded in 1996, delivers innovative IT solutions across infrastructure management, application development, testing, and digital transformation to enhance client competitiveness and growth.”
Ivory It
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Consultoria para criação de soluções digitais sob medida.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Betim, Minas Gerais, Br
Services Provided+8 Services
8% Frontend Development
8% Backend Development
14% Custom Web Application Development
4% API Development & Integration
AI Summary
“Ivory It is a consultancy specializing in tailored digital solutions, delivering customized software services to meet diverse client needs across various industries.”
Invokube
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Invokube is a software company that helps businesses grow and adapt in the digital landscape. We focus on updating outdated systems, optimizing operations, and creating innovative digital products that align with business objectives. Whether you're a rapidly growing startup, a traditional company lo
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+11 Services
5% Mobile App Development (iOS & Android)
3% QA & Software Testing
6% Legacy System Modernization
4% API Development & Integration
AI Summary
“Invokube is a global software company specializing in digital transformation, custom application development, business automation, and tech consulting to help businesses modernize and grow efficiently.”

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Top LLM Integration & Prompt Engineering Companies

List of the Best LLM Integration & Prompt Engineering Agencies

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