Top 10 custom software development companies of 2024

Choosing a trustworthy IT partner with the required skills and experience is vital to software project success. A reliable custom software development company not only delivers quality solutions on time and within a budget but dives into client business-specific needs and provides meaningful recommendations throughout the project if necessary.

Following best practices and using advanced technologies, IT service vendors also reduce time to market while improving the outcome. Communication flow and transparency are other important aspects you should take into account.

For instance, it may be quite challenging to establish effective collaboration in completely different time zones. As our practice shows, it is crucial to have 4–5 overlapping hours a day in order to discuss the required issues on the go.

In this article, we have described the top custom software development companies worldwide. When composing the list of the best IT service providers, we considered factors such as ratings on B2B review platforms, customer testimonials, domain/technology expertise, hourly rates, office locations, and minimum project size. So, have a look.

Top 10 custom software development companies

1. Altar.io

Services: Web and Mobile development, UI/UX design, Quality assurance

Hourly rates: $50–$99 / hr

Minimum project size: $25,000+

The number of employees: 10–49

Location: Lisbon, Portugal

Website: altar.io

Altar.io was founded in 2015 to help enterprises and institutions bring a user-centric approach to software product delivery, helping enterprises and organizations address challenges with technologies. Headquartered in Lisbon, a software engineering firm has offices in Milan and London.

Recognized as one of the top custom software development companies by B2B review platforms like Clutch, GoodFirms, and Techreviewer, Altar.io has delivered projects to numerous well-known clients, involving AlixPartners, Audio Test Kitchen, Coca-Cola, McKinsey, and IBM.

Cooperating with startups, SMEs, and large-scale businesses, Altar.io delivers custom development solutions to primarily fintech, regtech, and martech domains. The IT service provider has considerable experience in making apps and systems powered by AI (machine learning, deep learning, etc.), BI, and big data.

2. Aligned Code

Services: Custom mobile application development, Custom web application development, UI/UX design, Quality assurance, IT consulting

Hourly rates: $50–$99 / hr

Minimum project size: $25,000+

The number of employees: 50–249

Location: New York, US

Website: alignedcode.com

Founded in 2013, Aligned Code is among the top custom software development companies of 2024. Headquartered in the US, Aligned Code also has an office in Warsaw, Poland. For more than 10 years, the IT partner has gained vast expertise in numerous industries that involve fintech, e-commerce, e-learning, media & entertainment, adtech, and healthcare.

Aligned Code has extensive experience in cutting-edge technologies such as AI, IoT, big data, business intelligence, data science, and blockchain. Cooperating with startups, SMEs, and global corporations, a software engineering firm specializes in making CRM, ERP, video streaming, social network, gaming, OTT, and cryptocurrency applications.

Apart from custom development from scratch, Aligned Code helps modernize software, migrate to the cloud, and extend functionality. The team at Aligned Code also provides IT consultations and performs business analysis, spanning the target audience’s and competitor research.

By now, a custom software development company has built more than 100 projects, earning a 95%+ customer satisfaction rate. On top of that, Aligned Code has been repeatedly featured by trustworthy B2B platforms, like Clutch, GoodFirms, DesignRush, and The Manifest.

For example, Aligned Code was included in the ratings of “Top mobile app developers”, “Top software developers”, and “Top Ember.js company” by Clutch. Aligned Code’s high-profile clients involve PepsiCo, Viasat, Yandex, Nestlé, and McDonald's.

3. Itransition

Services: Mobile and web development, Quality assurance, IT consulting

Hourly rates: $25–$49 / hr

Minimum project size: $25,000+

The number of employees: 1,000–9,999

Location: Denver, CO

Website: itransition.com

Established in 1998, Itransition is one of the top custom software development companies in 2024. Having been operating on the market for over 25 years, the US software engineering firm delivers digital solutions to domains like e-commerce, fintech, healthcare, and telecommunications.

Collaborating with startups, SMBs, and corporations, Itransition has solid experience in cutting-edge technologies, involving artificial intelligence, robotic process automation, augmented / virtual reality, and the internet of things.

The IT service provider has worked a lot with globally recognized clients, such as eBay, adidas, Xerox, Toyota, PayPal, Citibank, Expedia, Telekom Austria Group, and KPMG.

Itransition has been time and again featured by B2B review platforms. For instance, Clutch included Itransition in the ratings of the best software developers, top ecommerce developers, and top Java developers. The organization was also in the “The Global Outsourcing 100” list composed by the International Association of Outsourcing Partners.

4. Capital Numbers

Services: Mobile and web development, Quality assurance, DevOps

Hourly rates: < $25 / hr

Minimum project size: $5,000+

The number of employees: 250–999

Location: Kolkata, India

Website: capitalnumbers.com

Headquartered in Kolkata, India, Capital Numbers was started in 2012 to deliver custom software development services, helping clients address their issues with technologies. Having more than 700 experts, the IT service provider also has offices in the US and Australia. Capital Numbers primarily cooperates with startups and SMEs.

To date, the organization has accumulated extensive expertise in industries like finance, e-commerce, marketing and advertising. Regarding innovative technologies, Capital Numbers specializes in making software products powered by AI, AR, VR, IoT, and blockchain.

With ISO 9001 and 27001 certifications, a custom software development company unites business analysts, project managers, UI/UX designers, programmers, and QA specialists to build projects from scratch.

Capital Numbers works according to T&M and Fixed Price payment models. The vendor of IT outsourcing services can either assemble a dedicated team to create a digital solution or the required professionals to scale in-house resources.

By now, a software engineering firm has worked with clients across different domains: Thomson Reuters, SDL, HelloBar, Kargo, CashPack, RenMoney, ZipAlert.io, Fundation, Proposify, and Consumer Reports. It is worth noting that trusted B2B review platforms, such as Clutch and GoodFirms named Capital Numbers as one of the top software developers worldwide.

5. Yalantis

Services: Mobile and web development, UI/UX design, IT consulting

Hourly rates: $25–$49 / hr

Minimum project size: $25,000+

The number of employees: 250–999

Location: Warsaw, Poland

Website: yalantis.com

Founded in 2008, Yalantis is among the top custom software development companies. Headquartered in Warsaw, Poland, a software engineering firm has offices in Ukraine, Estonia, and Cyprus. Having over 500 employees, Yalantis has managed to earn trust of well-known organizations, such as KPMG, Toyota Tsusho Corporation, RestorixHealth, Zillow, and Orbis Systems.

For 16 years, Yalantis has been delivering software products to sectors like fintech, healthcare, real estate, manufacturing, and transportation. The team at Yalantis has considerable experience in building solutions powered by blockchain, AI, IoT, and big data. Other specialties involve robotic process automation, data science, and cybersecurity.

Certified with an ISO 9001 and ISO/IEC 27001, Yalantis has a 96% client satisfaction rate. The provider of custom application development services has also been featured by trusted B2B review websites, for instance, Clutch, The Manifest, DesignRush, and GoodFirms.

6. Andersen Lab

Services: Mobile and Web development, UI/UX design, Quality assurance, IT consulting

Hourly rates: $50–$99 / hr

Minimum project size: $50,000+

The number of employees: 1,000–9,999

Location: Warsaw, Poland

Website: andersenlab.com

Established in 2007, Andersen Lab has grown to one of the top custom software development companies with over 3500 employees. The team at Andersen Lab consists of UI/UX designers, programmers, QA experts, business analysts, and other professionals.

Headquartered in Warsaw, Poland, Andersen Lab has offices in various countries worldwide, including US, UK, Lithuania, Hungary, Kazakhstan, Azerbaijan, and Georgia.

Throughout 17 years, the provider of IT outsourcing services has accumulated solid experience in sectors like fintech, healthcare, e-commerce, logistics, automotive, telecom, and media & entertainment. A software engineering firm works with various transformative technologies, for example, big data, virtual reality, machine learning, and deep learning.

To date, Andersen Lab has built more than 1000 software projects and cooperated with many famous clients, such as S&P Global, Siemens, Ryanair, T-Systems, Johnson & Johnson, IHS Markit, Samsung, and Mercedes-Benz. Featured as one of the 1,000 best B2B service vendors globally, Andersen Lab also collaborates with small and medium-sized businesses.

7. BairesDev

Services: Web and Mobile development, UI/UX design, Quality assurance

Hourly rates: $50–$99 / hr

Minimum project size: $50,000+

The number of employees: 1,000–9,999

Location: San Francisco, CA

Website: bairesdev.com

Founded in 2009, BairesDev is among the top software development companies that offers either full-cycle or IT staff augmentation services. Based in the US, a custom software engineering firm has grown to a team of more than 4000 employees since then.

Having experience in over 100 technologies and almost every programming language, BairesDev has already delivered 1,200+ software projects (CRM apps, ERP systems, e-commerce platforms, digital wallets, etc.) to 500+ customers across 100+ sectors. The IT partner specializes in making AI, data science, IoT, cybersecurity, and cryptocurrency solutions.

By now, BairesDev has worked with globally known organizations, like Google, Pinterest, HP, Motorola, NextRoll, and Rolls Royce. Additionally, the provider of custom software development services has a 91% client satisfaction rate and average relationship of more than 3 years.

8. Q agency

Services: Mobile and Web development, UI/UX design, Quality assurance

Hourly rates: $50–$99 / hr

Minimum project size: $50,000+

The number of employees: 250–999

Location: Zagreb, Croatia

Website: q.agency

Q agency was established in 2013 to provide custom software development services across various regions. Headquartered in Zagreb, Croatia, a software engineering firm has offices in the US, UK, and Switzerland. To date, Q agency has grown to a team of over 300 IT professionals and helped more than 200 clients achieve their business objectives.

Specializing in building mobile and web applications, the IT service vendor has solid experience in e-commerce, e-learning, media & entertainment, fitness & lifestyle, and hospitality sectors. Q agency has specialists for assistance in almost every IT aspect, including business analysis, solution architecture, and project strategy.

Delivering digital products to startups, SME, and large-scale enterprises, Q agency has cooperated with many notable clients, for instance, The Times, ManpowerGroup, FC Liverpool, Ferrari, Deloitte, Nestlé, and Walmart.

Certified with ISO 27001, ISO 9001, and ISO 27701, Q agency has been featured among the top custom software development companies by B2B review and rating platforms like Clutch.

9. Brew Interactive

Services: Mobile and Web development, UI/UX design, Quality assurance

Hourly rates: $50–$99 / hr

Minimum project size: $10,000+

The number of employees: 10–49

Location: Istanbul, Türkiye

Website: brewww.com

Established in 2009, Brew Interactive is one of the leading software development companies that offers full-cycle services, from project analysis and prototyping to deployment. Having nearly 50 employees, a custom software engineering firm has two offices in Türkiye.

During 15 years, Brew Interactive has been delivering software solutions to mainly automotive, energy, finance, healthcare, and information technology industries. With a strong focus on user interface (UI) / experience (UX) design, the IT service vendor creates appealing modern software products engaging the audience.

Recognized by trusted B2B review platforms, Brew Interactive has helped a lot of market leaders and global brands achieve their goals, involving Volkswagen, Skoda, Unilever, United International Pictures, Hasbro, Scania, Carrefour, Algebra Global, and Dogus Technology.

10. Baytech Consulting

Services: Mobile and Web development, Software modernization, Software development and maintenance consultancy

Hourly rates: $100–$149 / hr

Minimum project size: $25,000+

The number of employees: 10–49

Location: Irvine, CA

Website: baytechconsulting.com

Founded in 2007, Baytech Consulting is one of the top custom software development companies that offers full-cycle services. Baytech’s team consists of designers, programmers, testers, architects, and project managers.

A software engineering firm positions itself as a reliable IT partner who timely implements projects within a budget and speaks the language of its clients. For example, employees don’t use jargon-filled explanations during communications.

Collaborating with SMBs and large-scale enterprises, Baytech Consulting delivers software solutions to primarily healthcare, real estate, consumer services, and legal sectors. Additionally, Baytech specializes in building cloud-based software and migrating to the cloud. Baytech also offers consultancy, for example, on AWS cloud strategy, app development, and software maintenance.

By now, Baytech has built more than 100 products for either small businesses or Fortune 500 companies. Key clients are MedData, Petra Medical College, DCORE, and Ralis Services Corp.

Final words

When looking for a custom software development company, it is important to consider its domain, solution, and technology experience. Furthermore, you should take into account aspects such as budget and preferred solution delivery deadlines. Reputation is another essential factor. To check it out, you can view client testimonials and IT firm’s profiles on B2B review platforms, for instance, Clutch, GoodFirms, and The Manifest.

You can also connect with several IT service providers to discuss your project. This will allow you to discover with whom you have convenient communication, what team really understands your vision and goals. To eliminate data confidentiality risks, it is advisable to sign a non-disclosure agreement.

If you aim to build a software product or have some questions, you’re welcome to contact us and schedule a call with our CEO. We will get back to you within 24 hours and help address all issues. Project consultation is free of charge.