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

Flux IT

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$25,000+ $25 - $49 / hr 11-50 Gonnet, Argentina

Services Provided

40% Web Development

50% Custom Software Development

10% Mobile App Development

About

Flux IT is a digital solutions company made up of developers, software architects, and UX/UI designers. With over 14 years of experience and 90+ global clients, their teams focus on building scalable digital products using modern technologies and design practices. They combine technical execution with business understanding to deliver solutions that address real product and... Flux IT is a digital solutions company made up of developers, software architects, and UX/UI designers. With over 14 years of experience and 90+ global...

Activeone

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$1,000+ $25 - $49 / hr 1-10 Medellín, Colombia

Services Provided

15% Web Development

15% Custom Software Development

15% Mobile App Development

+3 more services

20% IT Staff Augmentation

15% Low/No Code Developmen...

10% Application Testing

About

We're Activeone. A software partner that actually moves the needle. From AI-powered recruitment to full-cycle product development, we help ambitious teams build smarter, scale faster, and hire without the guesswork. We work at the intersection of tech, talent, and bold thinking combining real expertise, fast execution, and a culture of transparency to deliver real results.... We're Activeone. A software partner that actually moves the needle. From AI-powered recruitment to full-cycle product development, we help ambitious teams build smarter, scale faster,...

deltAlyz Corp.

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$1,000+ $100 - $149 / hr 1-10 Vancouver, Canada

Services Provided

10% AI Development

10% Custom Software Development

10% Generative AI

+8 more services

10% Low/No Code Developmen...

10% AI Consulting

5% Web Design

10% API Development

5% CRM Consulting and SI

5% BI & Big Data Consulti...

5% ERP Consulting and SI

10% Robotics Process Autom...

About

deltAlyz Corp. builds custom AI-powered software solutions that are designed around each organization’s specific needs. Since 2019, the company has partnered with businesses to improve efficiency, simplify complex operations, and support long-term growth through practical innovation. Their approach is a combination of their technical expertise with a close focus on client needs, helping organizations streamline... deltAlyz Corp. builds custom AI-powered software solutions that are designed around each organization’s specific needs. Since 2019, the company has partnered with businesses to improve...

Modernize Your Business Software | Pilot West Studios

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$25,000+ Undisclosed 1-10 Columbia, TN

Services Provided

15% Web Development

10% AI Development

30% Custom Software Development

+2 more services

15% Mobile App Development

30% Enterprise App Moderni...

About

SASS Software Solutions helps businesses modernize outdated applications and ERP systems, especially for leaders who have struggled with unreliable development partners in the past. The company focuses on rebuilding legacy software into fast, predictable, and fully managed solutions that improve day-to-day operations. In one recent case, a client saw employees save up to 30% of... SASS Software Solutions helps businesses modernize outdated applications and ERP systems, especially for leaders who have struggled with unreliable development partners in the past. The...

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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.