Top Custom Software Development Companies in 2026: 9 Firms Compared

Thoughtworks is a well known technology consultancy that builds custom software for large organisations, with a focus on product engineering, cloud platforms and data. Its teams work in agile ways, with strong attention to code quality, testing and long term maintainability. For a company that needs a serious product built to last, that engineering culture matters.

The main limit is fit. Thoughtworks works mainly with larger clients and larger engagements, so a small business with a tiny budget will find a better match below. If your project is enterprise scale and quality matters more than the lowest price, it is a strong first conversation.

EPAM Systems is one of the largest custom software engineering firms, with teams across many countries and industries. It builds web, mobile, cloud and data platforms, and it can staff large programmes that smaller firms cannot. Companies that need many engineers, or work across several regions, often shortlist EPAM early.

Size brings process. Smaller projects can feel like a small part of a large machine, and onboarding may take longer. If your programme is large, long term and needs deep bench strength, EPAM is a serious candidate. If it is a single small app, a mid sized firm may move faster.

Globant combines product design, engineering and AI services, which suits companies that want a product designed and built by one partner. Its studios work on web, mobile, cloud and data products for large brands, and its AI work is a growing part of its offering. For a digital product that needs both design and build, that combination is useful.

Like other large firms, Globant is aimed at larger engagements, and a brief will usually need a discovery phase before a price is agreed. Smaller teams should compare mid sized firms below. For a major product launch, Globant offers design plus engineering under one roof.

ScienceSoft is a US based firm with a long history in custom software for regulated industries such as healthcare, banking and manufacturing. It builds enterprise software, ERP systems, data platforms and security aware applications, where architecture and compliance matter from day one. That focus suits organisations that cannot afford shortcuts on security.

It is not a low cost shop for a quick prototype. Engagements suit mid market and enterprise clients, and scoping will be thorough. If your project touches regulated data or complex enterprise systems, ScienceSoft is a strong, careful choice.

Andersen offers full cycle custom software development, with dedicated teams for web, mobile and enterprise systems. Its model suits companies that want a stable team over months or years, rather than a single short build. Industries include finance, healthcare, logistics and manufacturing, among others.

Dedicated teams work best for ongoing work, so a very short project needs clear scoping and an exit plan. If you need to extend your own team with engineers who stay on the product, Andersen is a practical option to compare.

BairesDev is a nearshore firm that staffs custom software projects for US companies, with engineers in Latin America and time zone overlap that helps daily collaboration. It offers staff augmentation, dedicated teams and end to end delivery, covering web, mobile, cloud and enterprise apps. For US teams that want closer hours than offshore options, that overlap helps.

Its scale suits larger clients, so a small project needs a clear brief to get the right team. If you are a US company that wants a nearshore partner for a sustained product effort, BairesDev is one of the most relevant firms to shortlist.

Intellectsoft builds custom mobile and web applications, with design and engineering under one roof. It has worked with both startups and larger companies, which makes it a flexible choice for a product that needs a polished app plus a backend. Its portfolio covers finance, healthcare, retail and other sectors.

Pricing is project based, so you will need a detailed brief for a useful quote. Simple apps may be cheaper with a smaller local studio, but for a polished product with ongoing support, Intellectsoft offers a good balance of size and focus.

Netguru is a product development firm that suits startups and scaleups building web and mobile products. It combines product design, engineering and growth support, and it has worked with many venture backed companies. For a founder who needs a team that understands product discovery as well as code, that mix is valuable.

It is less aimed at heavy enterprise systems or regulated back office platforms, so large corporate IT programmes should look at ScienceSoft or EPAM instead. For a consumer or business product with a clear user journey, Netguru is a strong candidate.

10Pearls builds custom software with a focus on digital transformation, product engineering, AI and cybersecurity. Its teams work in healthcare, finance, education and telecom, among other sectors, and it offers dedicated teams and managed services. For a company that wants product work plus security and AI input, that breadth helps.

Like other firms here, it focuses on mid market and enterprise work, so a quote needs a discovery conversation. If your project needs product engineering with a security aware approach, 10Pearls deserves a place on the shortlist.