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

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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

Leobit

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Quick Facts

$25,000+ $25 - $49 / hr 11-50 L'viv, Ukraine

Services Provided

20% Web Development

10% AI Development

50% Custom Software Development

+2 more services

10% Mobile App Development

10% Cloud Consulting & SI

About

Leobit is a full-cycle .NET, AI, and web application development provider for technology companies and startups primarily located in the US, EU, and the UK. We have representative offices in Austin, TX (USA), Tallinn (Estonia), Kraków (Poland), London (UK) and the development center in Lviv (Ukraine) with 170+ talented software engineers, architects, QA experts, and... Leobit is a full-cycle .NET, AI, and web application development provider for technology companies and startups primarily located in the US, EU, and the UK....

KITRUM

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$25,000+ $50 - $99 / hr 200-500 Tampa, FL

Services Provided

20% Web Development

20% AI Development

40% Custom Software Development

+1 more services

20% Mobile App Development

About

Kitrum is a custom software development company that builds scalable web, mobile, and AI solutions for fast-growing companies. We combine strong engineering talent with domain expertise to deliver complex products, integrations, and end-to-end development for healthcare, fintech, e-commerce and other industries. Kitrum is a custom software development company that builds scalable web, mobile, and AI solutions for fast-growing companies. We combine strong engineering talent with domain...

Designli

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$10,000+ $50 - $99 / hr 200-500 Greenville, SC

Services Provided

5% AI Development

25% Custom Software Development

60% Mobile App Development

+1 more services

10% UX/UI Design

About

Designli works closely with non-technical founders in order to turn ideas into well-structured and reliable digital products. The team pairs clients with dedicated product teams that include engineers, designers, and product owners who guide the process from the very start to finish. They focus on clear communication, realistic timelines, and aligned execution, helping founders avoid... Designli works closely with non-technical founders in order to turn ideas into well-structured and reliable digital products. The team pairs clients with dedicated product teams...

Redberry: Official Laravel & Vue Partner

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$10,000+ $25 - $49 / hr 11-50 T'bilisi, Georgia

Services Provided

10% Web Development

60% Custom Software Development

10% Mobile App Development

+2 more services

10% UX/UI Design

10% IT Staff Augmentation

About

Redberry works as one of the few official Laravel & Vue partners worldwide. The team brings together over 100 developers and more than a decade of hands on experience to deliver 200+ web & mobile applications on time and within the budget. They focus on maintaining firm client relationships and openly offer to connect prospective... Redberry works as one of the few official Laravel & Vue partners worldwide. The team brings together over 100 developers and more than a decade...

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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.