Top Custom Software Development Companies
Custom Software Development Companies have a 4.6 avg. rating from 8,159 verified reviews
Looking for a reliable custom software development company on the market? Find below the top local and global software development firms that can help your company increase sales potential. Filter results by location, size, pricing, and reviews to find the best partner for your needs.
List of the Best Software Development Firms
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Design Rush experts reviewed nearly 4,500 software development companies analyzing their expertise, past projects, client ratings, and other factors to help you find the perfect match for your needs.
Explore our handpicked list of service providers capable of offering exceptional software solutions tailored to your project requirements.
Table of Contents
The Number One Software Development Company as Selected by DesignRush Is:
1. Instinctools
- Best for: Overall
- Average Hourly Rate: $40
- Minimum Budget: $10,000 - $25,000
- Founded: 2000
- Size: 250 - 499
- Location: Potomac, Maryland
- Notable Clients: Lition, Swiss Red Cross, SAP, Fujitsu, Burda Digital, and more
Instinctools has been a prominent software development company for over 20 years, consistently delivering innovative and cost-effective solutions. Their expertise, reflected in over 1000 successful projects, encompasses custom software development, mobile and web solutions, legacy software modernization, business intelligence, data visualization, cloud and DevOps, and crypto exchange development.
When Lition needed a solution for energy exchanges, they turned to Instinctools. Their goal: ease barriers for green producers and provide cheaper green electricity to consumers. Instinctools used 10 JavaScript frameworks to create a powerful web platform.
Today, the platform built by the agency serves 41 million German households, allowing users in 30+ cities to save up to 20% on energy bills. Meanwhile, producers see up to a 30% profit increase, promoting both economic and environmental benefits.
The scope of the project was well-defined, with us providing the system requirements documentation. Instinctools [was] responsible for estimation and technical implementation that resulted in the desired business outcomes. We entirely relied on their expertise and ability to figure out the best way to implement the SDK functionality. We used Slack to communicate, and the team was very responsive, especially outside of their working hours, due to our time difference.
Check Instinctools Agency Profile
2. Itransition
- Best for: Zoom API App Development
- Average Hourly Rate: $40
- Minimum Budget: $50,000 & Up
- Founded: 1998
- Size: 1000 & Up
- Location: Lakewood, Colorado
- Notable Clients: AstraZeneca, PayPal, Adidas, Expedia, eBay, Philips, PepsiCo, Xerox, and more
A software development leader founded in 1998, Itransition has been a trusted partner for businesses ranging from startups to large enterprises. They cover a broad range of services, from ECM, EDM, ERP and CRM to custom-designed applications. Recognized for their skill in creating unified digital systems, they focus on clear communication, teamwork, and operational efficiency.
A mobile and healthcare technology expert, the company assisted a US research center with medical screenings for sexual assault victims in underserved areas. They developed an app enabling local nurses to consult experienced doctors, securely storing consultations and details on a website. The solution incorporated SSO user authentication, end-to-end encryption, and streamlined app performance, ensuring smooth operation and HIPAA compliance.
Result: In under six months, they had everything up and running. The new system allowed nurses to set up cases 3x quicker, take clearer photos and videos, and safely manage all information.
Itransition handled the complete build of a patented software solution due to a lack of internal developers. They provided strategy, information architecture, and quality assurance. The solution was instrumental to the company's success. It rolled out in over 600 locations, helped customers realize more than 120% of their profits, and grew company revenues from $145,000 to $1.45 million. We are impressed with their efficiency, creativity, and broad talent base.
Check Itransition Agency Profile
3. Kanda Software
- Best for: Customized Software Solutions
- Average Hourly Rate: $50
- Minimum Budget: $50,000 & Up
- Founded: 1993
- Size: 500 - 999
- Location: Boston, Massachusetts
- Notable Clients: CBRE, College Interactive, Havas Media, OneSky, Lionbridge, and more
Kanda Software, with 20+ years of experience, excels in software development, quality assurance, and compliance. They provide customized solutions, prioritize data security, adhere to benchmarks like HIPAA and PCI, and execute projects diligently with strong client communication.
In an era when traditional communication channels are becoming outdated, College Interactive faced the challenge of directly connecting college and university admissions departments with prospective students. Thanks to the agency’s innovative approach, College Interactive transformed the admissions marketing and recruitment process.
With Kanda Software's expertise, College Interactive launched the Ci Web Platform and mobile apps, giving students access to over 5,000 institutions while providing colleges with a direct contact channel for admissions details, requirements, and payment options.
Kanda Software is a core member of our team, and they’ve been involved in all our major projects. They helped us build a mobile-first website, as well as a lot of features and functions on several of our products. Kanda has performed really well. Their team has really helped to bring our numbers up.
Check Kanda Software Agency Profile
4. Oxagile
- Best for: Modern Software Solutions
- Average Hourly Rate: $40
- Minimum Budget: $10,000 - $25,000
- Founded: 2015
- Size: 250 - 499
- Location: New York City, NY
- Notable Clients: Orange, Discovery, Vodafone, Kaltura, and more
Oxagile, established in 2005, is a US leader in cutting-edge software solutions, specializing in video and machine learning integration. The agency creates top-tier applications for live streaming, VoD, real-time chats, VR, and 360-degree video on various platforms, leveraging AI for task automation. Clients like Orange, Discovery, and Vodafone have benefited from their commitment to research and development.
A leading German IT solutions provider for public transport, serving nearly a third of Germany's market, sought Oxagile's assistance in modernizing its legacy ticketing system. Their solution catered to 43 public transport companies and needed to enhance the experience for over 700,000 end-users across various platforms.
With Oxagile's expertise, the ticketing platform transformed, resulting in a twofold boost in database performance and an impressive 107% increase in transaction capacity, managing over 40,000 ticket transactions daily. The improved system also ensured client setups became 15 times faster, reinforcing the company's strong market standing.
Trond Hagen, Former Senior Director of Software Engineering at Nagra, enlisted Oxagile for mobile app development and staff augmentation services for his conditional access systems company. The agency's developers designed, implemented, and tested native iOS and Android applications, delivering high-quality mobile apps. Oxagile excelled in project management, maintaining constant availability and communication through virtual meetings. Hagen praised Oxagile's high-quality work, expertise, and professionalism.
5. Andersen
- Best for: AI/ML Integrated Applications
- Average Hourly Rate: $50
- Minimum Budget: $50,000 & Up
- Founded: 2007
- Size: 1000 & Up
- Location: New York City, NY
- Notable Clients: BNP Paribas, Globe Payroll, Samsung, Marvel, Media Markt, and more
A top custom software development firm with 15+ years of experience and 11 global offices, Andersen specializes in FinTech, eLearning, and Healthcare. They've delivered 1000+ projects with a team of 3000+ IT experts and excel in comprehensive testing using technologies like JavaScript, .Net, Python, and Swift.
BNP Paribas, the world's eighth-largest banking group, sought to monitor legislative changes across diverse regions effectively. Andersen provided a sophisticated solution with an AI and ML-integrated application, an ETL module, and a dedicated computational platform.
The system reduced operational times significantly, processing a 500-page document in two minutes instead of a week, resulting in a 7.3% decrease in toxic assets and an estimated project ROI of 124%.
There are several aspects [that] make Andersen the right choice in hindsight. The project manag[e]ment and communication, in general, were outstanding. PM and devs were always very responsive. We knew what everyone was working on and how their progress was. At the same time, the Andersen team worked in a very self-reliant way, and we knew that our products were in good hands. Another thing [that] I personally find astonishing is that Andersen has code reviewers and testers in the background.
6. Sigma Software
- Best for: AWS Cloud Technology
- Average Hourly Rate: $40
- Minimum Budget: $1,000 - $10,000
- Founded: 2002
- Size: 1000 & Up
- Location: Lviv, Ukraine
- Notable Clients: AOL, Knorr-Bremse, AstraZeneca, Volvo Penta, SAS, Fortum, and more
Sigma Software is a global software development firm with 20+ years of experience, 2000+ IT professionals across 12 countries, and expertise in automotive, healthcare, telecom, eCommerce, cloud computing, game development, and AR/VR/MR. They offer top-tier solutions and are recognized among the top 100 outsourcing companies worldwide. Certified in ISO 9001:2015 and ISO 27001, Sigma is a Microsoft Gold Certified Partner and AWS Consulting Partner.
AOL, a leading advertising media conglomerate, acquired a video ad platform and sought to integrate it into their vast ecosystem. Sigma Software stepped in to enhance the platform using AWS Cloud technology. Their solution processes 26TB of data daily, handles over 2.5 million events per second, and is now used by 30,000 global companies.
It enables swift report generation in just 1.5 minutes and accommodates versatile ad campaigns, addressing AOL's immediate needs and establishing them as prominent figure in the ad tech landscape.
We were so positively surprised and happy about Sigma's services, as usual I might add. It is a pleasure working with their software engineers. After we provided a briefing, the effort estimation came right away. Shortly after the project started, we could see the first tangible results. The code quality was excellent and comprehensive. Minor feedback was implemented right away. What can I say more: 10 out of 10 points!
Check Sigma Software Agency Profile
7. Softeq
- Best for: IoT Solutions
- Average Hourly Rate: $80
- Minimum Budget: $50,000 & Up
- Founded: 1997
- Size: 250 - 499
- Location: Houston, Texas
- Notable Clients: Lenovo, Epson, Microsoft, WTA, NVIDIA, Verizon, G.J.Gardner, Walt Disney Parks and Resorts, and more
Softeq specializes in digital transformation using cutting-edge technologies like IoT, AI, ML, industrial automation, robotics, blockchain, and AR/VR. They design high-performance, secure IT systems and connected devices, holding certifications in ISO 27001, ISO 9001, and ISO 13485. With an NPS of 50 and four consecutive years as an Inc. 5000 business, their growth and client satisfaction speaks for itself.
A client sought Softeq's help to develop an IoT solution for monitoring HVAC equipment wear and tear and detecting failures. Softeq responded with Sub-1 GHz transceivers for long-distance data transmission and a customized communication protocol for reliable data relay.
The P2P setup, using customized IEEE 802.15.4 protocols, provided consistent data transfer up to 300 meters while a mesh network alternative catered to future expansion needs. The results were impressive, demonstrating Softeq's expertise in IoT implementation.
Kozo Moriyama, Lead Engineer at OMRON, hired Softeq to assist in developing face shell recognition technology for his company. Softeq delivered outstanding proof of concept using OMRON's technologies. The agency understood the vision and delivered a well-performing product. Softeq provided regular updates, conducted thorough research, and communicated effectively. Moriyama was satisfied with the high-quality work and timely delivery, highly recommending Softeq's software development services.
8. Innowise
- Best for: All-Inclusive Management Tools
- Average Hourly Rate: $50
- Minimum Budget: $25,000 - $50,000
- Founded: 2007
- Size: 1000 & Up
- Location: St. Petersburg, Florida
- Notable Clients: OneStop Pro, N:aip, NFT Pro, IMT, CoreLedger, and more
Innowise Group, with 16+ years in software development, has a team of 1500+ IT experts across 40+ domains, delivering 850+ projects with a 93% recurring customer rate. Their customer-centric approach has earned them a global reputation, serving 200+ clients from 30+ countries.
When a client sought a streamlined solution for a new hotel management project, they turned to Innowise Group. The customized hospitality software resulted in a 43% revenue increase within three months, improved operational efficiency by 31%, and led to significant time and cost savings.
The all-inclusive management tool also contributed to the hotel's top-ranking position on TripAdvisor, confirming its enhanced guest service and overall excellence.
We hired Innowise to develop the backend part of our software solution in Java/Spring Boot and Python. Innowise Group had expert developers available quickly and were able to deliver on time. A project was managed easily. Their team is autonomous, responsive, open, and the account manager speaks perfect French. We received direct access to developers; everybody worked well, they asked relevant questions, no loss of time. They delivered the project on time without any budget alterations.
9. BairesDev
- Best for: Automated Systems
- Average Hourly Rate: $50
- Minimum Budget: Inquire
- Founded: 2009
- Size: 1000 & Up
- Location: San Francisco, California
- Notable Clients: Google, Salesforce, IBM, Autodesk, Rolls-Royce, Motorola, Burger King, and more
BairesDev is a leading nearshore software development agency with a team of 4,000+ bilingual professionals spanning the Americas and the Caribbean. They specialize in tailored solutions, delivering 1,200+ projects with a 91.2% customer satisfaction rate and 70.3% NPS.
Partnering with Google, BairesDev handled QA for Android TV launch, ensuring a consistent user experience across platforms. They also facilitated a seamless transition from manual to automated testing for Google's software updates on Android and iOS, ensuring uniformity and scalability.
After working with Phillipe and BairesDev team our internal team has seen a dramatic change in the efficiency and ease of working in the system. Our system downtime has decreased by 80%. Their response time to issues is immediate, and the progress on enhancements has been substantial.
Check BairesDev Agency Profile
10. ELEKS
- Best for: Optimizing Delivery Procedures
- Average Hourly Rate: $45
- Minimum Budget: $25,000 - $50,000
- Founded: 1991
- Size: 1000 & Up
- Location: Chicago, Illinois
- Notable Clients: Aramex, TAIT, Acino, GRTgaz, Autodesk, Blackboard, Havas, and more
ELEKS is a software engineering powerhouse established in 1991, combining quality, transparency, and innovation. With 2,000+ experts across Europe, the US, and Canada, they've delivered 700+ projects and hold an impressive Net Promoter Score of 65.
Aramex, a logistics leader, sought a technology partner to optimize its delivery procedures. ELEKS, known for mobile UX, data science, and R&D, became the chosen partner. They launched 17 projects in nine months, reducing warehouse operation costs by 5x and increasing mobile user retention by 230%.
The partnership proved highly beneficial for Aramex, showcasing ELEKS' efficiency and effectiveness.
Over a two-year period, the team at Eleks created exactly what we needed, providing exceptional expertise, professionalism and project management throughout the process, testing, and launch. Eleks succeeded in helping us improve our ability to trace the flow of recycled tires, while significantly reducing manual transactions and reporting. Thank you to the team at Eleks for their professional, dedicated support in reaching this incredible milestone!
How We Picked the Best Software Development Firms
To curate our premier software development firms list, our specialized team used a robust scoring system, evaluating each service provider based on the following criteria:
- Relevant software development services
- Project portfolios and collaboration with prominent clients
- Industry reputation and client reviews
- A thorough evaluation of their technical expertise and executive leadership
- Software development topics covered
- Digital reputation on DesignRush, Google, and other similar platforms
Visit our DesignRush Agency Ranking Methodology page for more insights into our rigorous selection process.
10 Most Popular Custom Software Development Companies Compared
| Agency Name | Location | Hourly Rate | Size | Best For |
| Instinctools | Potomac, MD | $40 | 250 - 499 | Overall |
| Itransition | Lakewood, CO | $40 | 1000 & Up | Zoom API App Development |
| Kanda Software | Boston, MA | $50 | 500 - 999 | Customized Software Solutions |
| Oxagile | New York City, NY | $40 | 250 - 499 | Modern Software Solutions |
| Andersen | New York City, NY | $50 | 1000 & Up | AI/ML Integrated Applications |
| Sigma Software | Lviv, Ukraine | $40 | 1000 & Up | AWS Cloud Technology |
| Softeq | Houston, TX | $80 | $50,000 & Up | IoT Solutions |
| Innowise | St. Petersburg, FL | $50 | 1000 & Up | All-Inclusive Management Tools |
| BairesDev | San Francisco, CA | $50 | 1000 & Up | Automated Systems |
| ELEKS | Chicago, IL | $45 | 1000 & Up | Optimizing Delivery Procedures |
Why Trust DesignRush
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Our dedicated team of agency experts built a network of over 30,000 agencies. We simplified the agency selection process, providing value to clients and agencies alike, via the DesignRush Marketplace.
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As seen on
Software Development Expertise
The software development firms on DesignRush specialize in a wide range of services such as custom software development, UI/UX design, DevOps, software testing and quality assurance, consulting, web and mobile app development, and many more.
Their specialists demonstrate remarkable technical expertise and soft skills alike and have an in-depth understanding of the client's business goals, challenges, and ideal user experience.
When designing and developing intuitive software applications, these agencies always keep industry standards and best practices in mind. Their teams have excellent project management skills, maintain efficient workflows, continuously QA test, and implement robust cybersecurity measures.
Agency Credibility Indicators
The best software development firms are recognized for their outstanding work through prestigious accolades, such as The Webby Awards, Software 500, SaaS Awards, Infoworld Bossie Awards, and more.
They possess certifications in Oracle, Project Management Institute, Amazon Web Services, Red Hat Software, Microsoft, Salesforce, Scrum, and many others.
Agencies’ Supported Technologies
These software development companies are proficient in various industry-standard technologies, tools, and software, including React, MEAN, MERN, Ruby on Rails, .NET, Python-Django, Flutter, Java, and others.
Agency Reviews
For deeper insight into these agencies, DesignRush features client testimonials that share project challenges, results, and overall feedback. Each review undergoes verification, ensuring that the insights we present are both current and accurate.
Using the Bayesian Statistical Method, our algorithm calculates the most probable success rate for each agency. This reduces bias and promotes equity in the rating system, aligning our agency rankings more closely with the genuine quality of the services they offer.
Content Relevance & Accuracy
We make sure our content stays up to date, incorporating the latest listing data, industry trends, emerging technologies, and real-time insights supplied by agencies. It is reviewed by seasoned industry professionals who also provide their invaluable expertise — ensuring accurate and in-depth information.
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