B2B Company Directory

Top Custom Software Development Companies

A high performing custom software solution is the backbone of your digital operations. From requirements discovery and system architecture to bespoke development and third party integrations, the right development partner turns ideas into scalable products. 10Firms streamlines your search by collecting in depth, verified reviews and performance data on thousands... Read More

220+ Companies Listed Custom Software Development Packages

We verify reviews and evaluate companies so you can choose with confidence. Learn how 10Firms ensures trust.

Web Development Mobile App Development E-Commerce Development Enterprise App Modernization Low/No Code Development API Development Blockchain Application Testing AR/VR Development IoT Development DevOps Managed Services Application Management & Support Robotics Process Automation Wearable App Development

Best Custom Software Development Agencies

220+ Companies

AgileEngine

Premier Verified

0.0

0 Reviews

View Profile Visit Website

Quick Facts

$25,000+ $25 - $49 / hr 1-10 Boca Raton, FL

Services Provided

10% Web Development

15% AI Development

30% Custom Software Development

+3 more services

10% Mobile App Development

20% UX/UI Design

15% IT Staff Augmentation

About

AgileEngine builds high-performing remote dedicated teams that help businesses to scale engineering capacity efficiently. Founded in 2010 & headquartered in the Miami area, the company has grown rapidly and earned recognition on the Inc. 5000 list of booming companies in the U.S. They support clients with strong engineering talent and flexible team models designed to... AgileEngine builds high-performing remote dedicated teams that help businesses to scale engineering capacity efficiently. Founded in 2010 & headquartered in the Miami area, the company...

Perpetual

Premier Verified

0.0

0 Reviews

View Profile Visit Website

Quick Facts

$25,000+ $100 - $149 / hr 11-50 New York, NY

Services Provided

20% Web Development

3% AI Development

10% Custom Software Development

+5 more services

10% Mobile App Development

2% E-Commerce Development

30% UX/UI Design

15% Low/No Code Developmen...

10% Web Design

About

Perpetual delivers full-service software design and development solutions for startups and Fortune 500 companies. Founded in New York City in 2012, the team builds digital products across industries like finance, healthcare, media, and insurance. They focus on turning business ideas into scalable, well-designed digital solutions that support long-term growth. Perpetual delivers full-service software design and development solutions for startups and Fortune 500 companies. Founded in New York City in 2012, the team builds digital...

DOOR3

Premier Verified

0.0

0 Reviews

View Profile Visit Website

Quick Facts

$25,000+ $100 - $149 / hr 11-50 New York, NY

Services Provided

25% Web Development

25% AI Development

25% Custom Software Development

+1 more services

25% UX/UI Design

About

We are a software consultancy. Our purpose is to benefit our clients — their people, products, and services. Our core strengths are software development, technology strategy, and UI/UX design. Our difference is a peerless capacity to safely and reliably deliver solutions on-time and on-budget. Founded in 2002, we’re headquartered in New York City, and supported... We are a software consultancy. Our purpose is to benefit our clients — their people, products, and services. Our core strengths are software development, technology...

Phenomenon Studio

Premier Verified

0.0

0 Reviews

View Profile Visit Website

Quick Facts

$10,000+ $50 - $99 / hr 11-50 Dover, DE

Services Provided

15% Web Development

10% Custom Software Development

10% Mobile App Development

+5 more services

25% UX/UI Design

10% Low/No Code Developmen...

10% Web Design

10% Branding

10% Product Design

About

Phenomenon Studio has contributed to products that have raised over $500M and achieved up to a 35% increase in conversion rates. Recognized by Clutch, the company brings together a team of 60+ mid- to senior-level experts who focus on delivering strong, consistent outcomes. They combine local UX strategy support in North America with experienced design... Phenomenon Studio has contributed to products that have raised over $500M and achieved up to a 35% increase in conversion rates. Recognized by Clutch, the...

Kick off your next project today

Connect with top-rated Custom Software Development companies and start your project with confidence.

Build my Project

Why Trust 10Firms

At 10Firms, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.

Every review on 10Firms undergoes a rigorous, human-led verification process to make sure it's valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.

Custom Software Development FAQs

Looking for a Custom Software Development company but not sure where to start? We've put together answers to the most common questions businesses ask when searching for a trusted partner.

How do I choose the right custom software development company for my project?

Start by defining your project scope, budget, and timeline. Look at each firm's portfolio for relevant industry experience, check verified client reviews on 10Firms for reliability and communication, and confirm they have the tech stack your project requires.

How much does it cost to hire a custom software development company?

Costs vary widely based on project complexity, the firm's location, and team seniority. Complex engagements often range from $25,000 to $150,000 or more, depending on scale and specialization required. Use 10Firms filters to compare firms within your budget range.

What is the difference between a custom software development agency and a freelancer?

Agencies typically offer a full team of developers, QA engineers, project managers, and solution architects, with more structured processes, making them better suited for complex or long term projects. Freelancers can be more cost effective for smaller, well defined tasks but often have limited capacity.

How long does it take to build and launch a new application?

These engagements typically take 3 to 9 months, depending on complexity and organizational scale.

Do custom software development companies also handle ongoing support after the project is delivered?

Most firms listed on 10Firms offer post launch support packages covering bug fixes, performance monitoring, and feature enhancements. Check each firm's profile to confirm terms and pricing.

What should I look for in a custom software development company's portfolio?

Look for evidence of clean, scalable code and successful production deployments, and where available, measurable outcomes like faster load times or increased user adoption delivered for past clients.

Can these companies help with related services beyond custom software development?

Many firms on 10Firms offer end to end services covering UX/UI design, quality assurance, and DevOps support alongside core development. If you need a specialist for just one phase, check each firm's service listing to confirm.