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

Hidden Brains InfoTech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Hidden Brains, established in 2003, is a leading AI consulting and custom enterprise software development firm that specializes in creating innovative solutions powered by AI technology for businesses. We facilitate comprehensive digital transformation for a range of industries worldwide, enabling b
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Ahmedabad, Gujarat, In
Services Provided+11 Services
5% ERP & CRM Development
5% QA & Software Testing
5% API Development & Integration
6% Frontend Development
AI Summary
“Hidden Brains InfoTech provides AI-driven custom software development and digital transformation solutions across 39 industries worldwide, utilizing agile methodologies to deliver innovative, scalable technology services.”
Cyber Chasse
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Cyber Chasse is your comprehensive resource for all IT security requirements. We are dedicated to providing a wide range of IT security solutions while ensuring you receive great value for your investment. Cyber Chasse is well aware of the challenges present in your IT infrastructure and offers seam
Highlights
50-249
Employees
Tampa, Florida, Us
Services Provided+5 Services
5% Other IT Consulting and SI
6% BI & Big Data Consulting & SI
4% IT Staff Augmentation
5% Cloud Consulting & SI
AI Summary
“Cyber Chasse delivers comprehensive IT security and technology solutions across diverse sectors, enhancing businesses with expertise in cybersecurity, AI, cloud computing, and enterprise applications.”
WebSenor
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are WebSenor, an organization based in India with offices in the US, UK, Kuwait, and India. Our team provides cutting-edge IT services to clients worldwide. We specialize in Website Design and Development, Software Development, Mobile Application Development, Digital Marketing, Offshore Outsourci
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+3 Services
18% Custom Web Application Development
15% Mobile App Development (iOS & Android)
7% API Development & Integration
5% E-Commerce Development
AI Summary
“WebSenor offers global clients innovative IT solutions including website and software development, mobile apps, digital marketing, and offshore outsourcing, leveraging a decade of expertise and client-focused service.”
Caxsol
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Caxsol is a prominent technology partner known for its expertise in software development, cloud consulting, and mainframe modernization. Our skilled engineers and consultants are committed to fostering innovation and improving efficiency, assisting businesses in optimizing operations, boosting secur
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+5 Services
5% Frontend Development
9% Legacy System Modernization
6% Backend Development
5% Custom Web Application Development
AI Summary
“Caxsol specializes in software development, cloud consulting, and mainframe modernization, delivering innovative digital solutions that enhance operational efficiency, security, and business competitiveness.”
Cloud Advisory LLC
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Cloud Advisory provides Salesforce customization, development, and consulting services to both for-profit and non-profit organizations. Previously known as iworkdigital.com LLC, Cloud Advisory has collaborated with hundreds of entrepreneurs, business owners, and sales and marketing professionals to
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Long Beach, California, Us
Services Provided+3 Services
25% Mobile App Development (iOS & Android)
20% Custom Web Application Development
15% CRM Consulting and SI
10% Cloud Consulting & SI
AI Summary
“Cloud Advisory LLC specializes in Mobile App Development, providing expert services for custom mobile applications on iPhone and Android platforms, supporting clients in deploying robust and scalable mobile solutions.”
TeamTeki Private Limited
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At TeamTeki, we excel at making software quality simpler. Our premier product, Co.Meta, is an advanced open-source meta-testing platform equipped with AI. Built with robust enterprise-grade architecture and strong security features, Co.Meta offers DevOps, SDET, and QA engineers the flexibility of co
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Noida, Uttar Pradesh, In
Services Provided+3 Services
9% Workflow Automation (Zapier / Make / n8n)
4% Unified Communications Consulting & SI
12% Other IT Consulting and SI
25% Cybersecurity Assessments & Hardening
AI Summary
“TeamTeki Private Limited develops Co.Meta, an AI-powered open-source platform simplifying software quality for DevOps, SDET, and QA engineers with versatile, secure, and efficient testing solutions.”
SpellSystems
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Established technology and methods enhanced by advanced AI for improved quality, quicker releases, and cost effectiveness. SpellSystems is a research and development firm focused on custom software development and software integration, possessing extensive knowledge across various domains.
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Dubai, Dubayy, Ae
Services Provided+6 Services
18% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% E-Commerce Development
13% API Development & Integration
AI Summary
“SpellSystems is a research-driven firm specializing in custom software development and integration, leveraging advanced AI to enhance quality, speed, and cost-efficiency across diverse domains.”
CNXDevSoft
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
CNXDevSoft offers software development services utilizing Microsoft technologies, including ASP.Net, C#, MVC framework, web applications, e-commerce, and Umbraco CMS. We also specialize in website design, creating responsive web designs that adapt seamlessly to various screen sizes such as smartphon
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Pa Daet, Th
Services Provided+1 Services
20% Custom Web Application Development
15% Backend Development
10% Frontend Development
5% Legacy System Modernization
AI Summary
“CNXDevSoft specializes in Microsoft-based software development, responsive web and e-commerce design, SEO optimization, and software consulting, emphasizing quality and customer satisfaction.”
Agentify
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Every company needs a distinctive marketing and product strategy tailored to its specific needs. We provide a variety of services and business models that align with your development stage. As a software development firm, we specialize in building agile software for marketing agencies and department
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Reading, Berkshire, Gb
Services Provided+1 Services
20% Custom Web Application Development
15% Backend Development
10% QA & Software Testing
5% Legacy System Modernization
AI Summary
“Agentify specializes in agile software development for marketing teams, delivering tailored strategies and scalable solutions that enhance growth and streamline operational efficiency.”
Rebbix
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Rebbix offers highly effective engineering teams as a service. Since 2012, we have been assisting product companies in expanding into new markets, launching products, making pivots, and achieving product-market fit. We believe in the principle that less is more. We excel at hiring and assembling tea
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Lviv, Lviv, Ua
Services Provided+8 Services
15% Custom Web Application Development
5% Mobile App Development (iOS & Android)
13% Backend Development
13% API Development & Integration
AI Summary
“Rebbix provides expert engineering teams offering AI consulting, custom software and app development, and engineering management to support product growth and market expansion since 2012.”

...

...

...

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.