Top HVAC Legacy System Modernization Companies

Discover Legacy System Modernization companies serving the HVAC industry. Compare services, pricing, and capabilities to find the right partner on Edverise.

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

4,482 Companies

Top HVAC Legacy System Modernization Companies

NetzOptimize Inc.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
NetzOptimize is a leading software company that provides comprehensive end-to-end development services to businesses of all sizes. Our offerings encompass every stage of the software development lifecycle, including design and prototyping, development, quality assurance/testing, deployment, and main
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Miami, Florida, Us
Services Provided+14 Services
7% Custom Web Application Development
5% Mobile App Development (iOS & Android)
7% Backend Development
7% Frontend Development
AI Summary
“NetzOptimize Inc. delivers comprehensive software development services, leveraging expertise in design, development, testing, and deployment using modern technologies and Agile methodologies to serve diverse clients globally.”
Dual Technology Services
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are a company focused on enhancing processes using technology, mobile solutions, web development, integrations, business intelligence, and software implementation.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
San Pedro Sula, Hn
Services Provided+7 Services
13% Custom Web Application Development
5% E-Commerce Development
5% Legacy System Modernization
10% Mobile App Development (iOS & Android)
AI Summary
“Dual Technology Services specializes in technology-driven solutions including software development, UI/UX design, AI and automation, and IT consulting, enhancing business processes and digital transformation.”
Phuse
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are a digital agency that leverages design and development to address challenges, collaborating closely with clients as partners to develop enduring solutions that enhance conversion rates, productivity, and customer satisfaction.
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
17% Custom Web Application Development
15% Mobile App Development (iOS & Android)
2% Legacy System Modernization
13% Product UX Strategy
AI Summary
“Phuse is a digital agency specializing in collaborative design and development to create lasting solutions that improve client conversion rates, productivity, and customer satisfaction.”
Total Blossom LLC
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Total Blossom is a full-service software and internet marketing agency located in Los Angeles, dedicated to fostering business growth. We assess and address digital challenges, creating effective strategies to provide outstanding customer experiences through software development, design, content cre
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Lawndale, California, Us
Services Provided+14 Services
7% Mobile App Development (iOS & Android)
3% Legacy System Modernization
5% E-Commerce Development
2% Blockchain & Web3 Development
AI Summary
“Total Blossom LLC is a Los Angeles-based full-service agency offering software development, design, content creation, and digital marketing solutions to enhance business growth and customer experience.”
SiteRocket Labs
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
SiteRocket Labs develops tailored web applications and digital products designed to address intricate issues. Businesses turn to us when they require websites that cater to specific requirements—such as showcasing data, optimizing logistics, facilitating secure transactions, and beyond. Our bespoke
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
10% Backend Development
3% Legacy System Modernization
20% Custom Web Application Development
7% Interaction Design
AI Summary
“SiteRocket Labs specializes in developing customized, reliable web applications and digital products that address complex business needs, enhancing data presentation, logistics, security, and scalability.”
American Appworks, LLC
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
American Appworks is a software development firm located in the United States. Focusing on both web and app development, we take on projects from a variety of industries. We are convinced that software is only effective if it meets your needs; if it doesn't, it simply isn't effective. This fundament
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% QA & Software Testing
5% Legacy System Modernization
AI Summary
“American Appworks, LLC is a US-based software development firm specializing in web and app solutions for diverse industries, committed to user-focused, high-quality software.”
IT DEV GROUP
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Our primary goal is to provide a high-quality product for automating your business processes. We help turn your concept from an initial idea into a fully functional product, giving you a ready-to-use business tool. As a web development company, we facilitate the rapid creation of stable products bac
Highlights
$10,000+
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)
10% Backend Development
8% Frontend Development
AI Summary
“IT DEV GROUP specializes in developing high-quality web and mobile business automation tools, leveraging modern technologies, in-house design, and a focused tech stack for diverse client solutions.”
i-Source Infosystems
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
i-Source addresses business challenges by reshaping enterprise technology to enhance operational flexibility, strengthen business resilience, improve efficiency, and lower costs throughout the entire enterprise ecosystem.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Pune, Maharashtra, In
Services Provided+5 Services
20% Custom Web Application Development
5% Legacy System Modernization
6% Cloud Consulting & SI
6% AI Strategy & Roadmap Consulting
AI Summary
“i-Source Infosystems transforms enterprise technology to boost operational flexibility, business resilience, and efficiency, while reducing costs across the entire organizational ecosystem.”
Hostrings
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Web Designer: The leading website design and development firm provides exclusive website design, web development, and SEO services in Karachi, Pakistan.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Karachi, Sindh, Pk
Services Provided+11 Services
3% Mobile App Development (iOS & Android)
8% E-Commerce Development
5% Legacy System Modernization
5% Mobile App UI Design
AI Summary
“Hostrings is a multidisciplinary digital solutions firm in Karachi offering mobile app development, UX/UI design, branding, digital marketing, IT services, and business consulting for retail clients.”
Commit Labs LLC
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We build strong engineering teams composed of the top 1% of IT talent to deliver comprehensive technology solutions for SMEs, enterprises, funded startups, and ventures. Our development team brings years of experience in Ruby on Rails, Angular, React, Swift, ObjectiveC, and Java (Android).
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
18% Custom Web Application Development
18% Mobile App Development (iOS & Android)
7% Legacy System Modernization
7% IT Staff Augmentation
AI Summary
“Commit Labs LLC builds elite engineering teams delivering comprehensive software development and IT staff augmentation services, supporting diverse clients with expertise in modern technologies and AI-driven solutions.”

...

...

...

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.