Top Custom Software Development Companies
List of the Best Custom Software Developers

ASSESS
Our team is committed to spending as much time as needed to ensure 100% satisfaction.
DEVELOP
We strive to achieve 100% satisfaction. We pride ourselves on continually achieving 100% client satisfaction.
LAUNCH
We are there every step of the way to ensure your customers never leave your site feeling frustrated.
Through Analysis + Practical Innovation
Our project development process involves total transparency, continuous collaboration, and a surgical focus on supporting what drives your business.
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Undisclosed
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2 - 9
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Undisclosed / hr
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US, Grand Forks
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K2XO brings the latest research, design, and technology to transform businesses and challenge current thinking.
We believe that truly compelling solutions are created when user experience and business operations are seamlessly integrated into a single strategy.
For more information, visit our website at www.k2xo.com.
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Undisclosed
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10 - 49
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Undisclosed / hr
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CA, Toronto
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Kadro is a software engineering firm that delivers B2C/B2B eCommerce solutions on Magento Commerce, as well as facilitating brand participation on marketplaces via its marketplace integration product/services. Kadro provides a full range of eCommerce development and integration services including:
- eCommerce strategy and consulting
- B2C and B2B eCommerce website design, development, testing, and support
- Magento Commerce 2 integration, custom development, and support
- ERP, OMS, PIM, and CRM integrations
- Marketplace integration and onboarding: eBay, Amazon, Walmart
- Mobile commerce and Responsive Web Design
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$50,000 +
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10 - 49
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$150 - $199 / hr
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US, Raleigh
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Having a background in mining industry, KAI Software has been working 20 years with large corporations automating their working process. Right now we are bringing this experience to our client's projects, which includes b2b and b2b2c software development.
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$50,000 +
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50 - 249
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$100 - $149 / hr
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US, New York City
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Undisclosed
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2 - 9
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Undisclosed / hr
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CA, Montreal
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A boutique consultancy specializing in Predictive Analytics, Artificial Intelligence, Machine Learning, Deep Learning, Big Data, and Digital Transformation solutions for mid- and large-size enterprises. Our clients are major players in the financial services, insurance, health care, and utilities industries.
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$5,000 +
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2 - 9
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$100 - $149 / hr
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US, Jupiter
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Katalyst Interactive is an award-winning software development company based in Adelaide, South Australia. We build custom websites and applications for businesses from growing digital start-ups and small business through to enterprise and government.
Over the last 19 years, we’ve honed our process and refined our technology. Our services provide businesses the benefits of creating their own applications that leverage their organisations intellect and fit perfectly with how they work. Our process is transparent and we encourage our clients to be intimately involved with each project.
We use an Agile approach for complex projects or start-ups, as well as following a more traditional waterfall process for some clients. We’ve combined our excellence in methodology with a holistic approach to user experience that involves both our designers and engineers. We’ve found this approach creates the most usable applications.
As one of the most experienced Ruby on Rails web development agency in South Australia, our custom Content Management System (CMS) is created in Ruby on Rails and is used in over 30 local, national and international sites.
We value the relationships we have developed with our clients and the trust they put in us to deliver their projects year after year. We’re proud to say that some of the most trusted organisations in Australia continue to choose Katalyst Interactive. From the Adelaide Fringe and The University of Adelaide through to the Victorian and South Australian Governments. Our work has also been recognised in awards both nationally and internationally.
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$10,000 +
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2 - 9
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$150 - $199 / hr
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AU, Adelaide
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Whether your business is in need of lean strategy, product and service design, advanced CX and UX, managed services, or product realization, we help you grow and enhance your business and product offerings.
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$10,000 +
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50 - 249
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$25 - $49 / hr
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UA, Kyiv
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Kellton Tech is a ‘Born Digital’ technology consulting and services company founded on the belief ‘Infinite Possibilities with Technology.’ We empower disruptive growth and turn businesses into ‘Digital and Smart Enterprises’ of tomorrow. Leveraging technology as a competitive differentiator for success, we engineer unique and business-specific custom IT solutions for organizations across scale and industry verticals. With in-depth domain knowledge across industries such as Insurance, Financial Services, Real-Estate, and Non-Profit, we have led successful digital transformation journeys for businesses ranging from Small and Medium Enterprises (SMEs) to Fortune 500 companies. Kellton Tech’s core services encompass custom software development, e-commerce development, enterprise app modernization, frameworks and CMS development, and application platform development. Our workforce of dedicated ‘Kelltonites’ operational across North America, Europe, and Asia-Pacific, is consistently on the lookout for the next exciting challenge.
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$25,000 +
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1,000 - 9,999
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$25 - $49 / hr
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US, Reston
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$10,000 +
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250 - 999
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$50 - $99 / hr
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US, Louisville
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Kenzan is a software engineering and full service digital consulting firm that provides customized, end-to-end solutions that align technical strategy with business goals. Combining leadership with technical expertise, Kenzan works with partners and clients to craft solutions that leverage cutting-edge technology, from ideation to development and delivery.
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Undisclosed
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50 - 249
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Undisclosed / hr
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US, Pawtucket
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Keystone’s focus is in the development of superior information management solutions for municipal and county governments, and public school districts, currently targeting the states of New Jersey, Pennsylvania, Virginia, North Carolina, Missouri and Rhode Island. Keystone Information Systems is a multi-platform, service-oriented software developer and systems integrator specializing in the K-12 public school district and municipal / county government administration markets.
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Undisclosed
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2 - 9
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Undisclosed / hr
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US, Maple Shade
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KeyToTech helps to build successful software products, delivering excellence and deep expertise in a range of industries including, logistics, healthcare, finance, and many others. We provide powerful technologies solutions to our clients, empowering innovations, and boosting digital transformation.
With a solid experience in IT industry, our engineering team offers a full-cycle software development of any kind. We believe communication with the customer is the essential element of success, so our company is focused on providing powerful business solutions and maintainable stable products at the same time.
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$10,000 +
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10 - 49
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< $25 / hr
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UA, Lviv
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We treat every single client or ours as a member of our family. Supporting you is non-negotiable service. Our Team is capable of demonstrating high level of reliability and scalability with our valued clients. Our goal is to solve your problems and overcoming your challenges.
KeywordCore is a Digital Agency Specialized in Creating Top-Class Digital Experience for their Clients.They Deliver High-End WebSites, Web Apps, Mobile Apps and All-in-one Digital Marketing Services. What differentiates KeywordCore from other Digital Agencies? i The main difference is that we value and understand the challenges that our clients are facing, we put ourselves in their shoes and speak their language. Web development, App development, Digital Marketing and SEO are not Tech-related services only!. They are main factors in changing any company’s future revenue stream. We take your project as ours. The better you are, the better we will become.
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$1,000 +
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10 - 49
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$50 - $99 / hr
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CA, Brampton
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Who are we?
At Khieuware we have an excellent team for many different fields of our company. Our prestigious company has a long history in association with the services we provide. Since 2011, we have been developing websites and providing digital marketing services through various methods. The CEO of Khieuware, Manny Vin will ensure to provide you with the quality work you expect.
What do we do?
Khieuware is a software company that specializes in creating and designing websites. We offer many services to help you with your business, such as;
Digital Marketing
Social Media Marketing
Web Based Apps
Logo Designing
SEO Optimization
E- Commerce Websites
And More.
We can help you take your business to a higher level. Use Khieuware to create the website of your dreams. You can promote your website, sell your products, get clients and use Khieuware for it all!
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$1,000 +
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50 - 249
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< $25 / hr
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CA, Richmond Hill
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Kickbyte is a full service digital solutions agency proudly based out of Edmonton, Alberta. We are an inspired group of industry experts and innovators with proven track records in end-to-end web content management and digital marketing solutions.
Our passion is everything digital from strategy, design, development, to marketing.
Our purpose is helping you grow your brand, better understand your audience, and connect with your customers in engaging and meaningful ways.
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$5,000 +
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10 - 49
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$100 - $149 / hr
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CA, Edmonton
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Killer Mobile ® Software + Development Company has been developing cutting edge, quality mobile applications since 2003, but our experience in the mobile industry reaches back much farther than this. Our team consists of Mobile Development Professionals with over 40 combined years experience, coding some of the most well known mobile software around. However, writing code is just half the story. We have our finger on the pulse of this ever-changing industry & offer consultation services to help you break into the the exciting world of mobile or if you're already in it, we can help your business reach new heights. We offer Software Development & Consultation in the following areas: Symbian C++ (S60) Windows Mobile Android iPhone QT Maemo/Meego Blackberry Java (MIDP 1.0 & MIDP 2.0, J2ME Polish) OTA Application Delivery SMS Systems & Custom SMS apps Mobile Security & Tracking Solutions Mobile GPS
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Undisclosed
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2 - 9
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$25 - $49 / hr
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US, Henderson
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$10,000 +
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50 - 249
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$50 - $99 / hr
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NO, Frydenberg
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Kirusoft Dev. grows businesses using software. We create custom software to automate the day-to-day activities of your business. In 2019 alone, we have helped over a dozen businesses see 10x revenue growth. Join them by visiting kirusoft.com to schedule a free consultation.
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$5,000 +
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10 - 49
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$100 - $149 / hr
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US, Atlanta
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We accomplish this by investing in customer relationships, getting to the root of digital workplace problems and designing intranet solutions that work for the organization and its users.
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$10,000 +
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2 - 9
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$150 - $199 / hr
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US, San Diego
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A digital marketing agency meets the needs of your business, from managing social media to managing Google Ads campaigns, optimizing your website, and providing server management services. Therefore, to meet your company's demand, KleenSoft is ready to take on all the constraints your company requires to perform all activities with our expertise in this field.
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$1,000 +
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10 - 49
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$25 - $49 / hr
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US, New York City
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Kliento Technologies Pvt. Ltd. is the IT solution provider, we are the blend of experience and expertise with deep in-build knowledge. The companies are moving towards digital age that mark their competitive advancement in the new era. We ignite their existence with the technological solutions around Digital Transformation, Cloud Services, IoT, ChatBots, Mobility solutions, and business solutions around Salesforce, Design Engineering, Business Analytics, and Application Support & Maintenance.
Being present in the U.S.A, India and Singapore with the development centre in the IT hub, Noida, we provide the IT consulting for the customer-facing technological solutions with front-end and back-end complete support. Kliento brings the best innovative IT technology solution to the enterprises in varying industries that are transforming digitally.
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$1,000 +
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10 - 49
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< $25 / hr
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US, Paramus
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Klopotek's Product Planning and Management system (PPM) enables publishers and media companies to optimize the management of internal and external processes. Publishers of every size – from small publishers to global media corporations – plan, manage and market their complete print and digital product portfolios with PPM. With the support of modern workflows, PPM tools help to develop products and to turn content into business.
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Undisclosed
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2 - 9
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Undisclosed / hr
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US, Parsippany-Troy Hills
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Knocknock Games is an independent game development studio with R&D Center in Eastern Europe and Representative Office in San Francisco, CA. Our team combines 30+ talented developers. There are game industry veterans with more than 12 years of experience and creativity and passion of middle-level developers. We develop and produce games for hire as well as work on our own projects. We offer:
- Game prototyping
- Game Design and Story Writing activities
- Concept art and in-game content creation
- Development Activities
- Release consulting services
- Server backend software development
- Post-release support
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$5,000 +
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10 - 49
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$25 - $49 / hr
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US, San Francisco
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Knoldus is the world’s largest Functional Programming (Scala, Rust, Java) and Fast Data (Spark, Flink) company. Our mission is to provide reactive & streaming fast data solutions that are message-driven, elastic, resilient, and responsive to build High-Performance Systems. We help organizations by developing and modernizing their system with custom IT solutions. We build on the work ethics and values, which translate directly to the quality of our systems.
We solve IT challenges such as:
- High-Performance Systems
- Intelligent driven decision - AI/ML
- Data Strategy and Analytics
- Platform Strategy
- Blockchain (DAML)
- Expert Services
Knoldus is fortified by an expansive network of certified strategic partners like Lightbend, IBM, Datastax, Confluent, Databricks, Knime, Snowflake, DAML; helps enterprise clients – including many Fortune 500 companies – to create the next-generation capabilities that set them apart.
Knoldus has global references in:
- Finance
- Banking & Insurance
- Healthcare
- Retail and E-commerce
- Travel and Tourism
- Media and Entertainment
- IT and Networking
Some of our marquee clients include Google, HPE, EY, Elsevier, BoA, Cisco, VMWare, Huawei, Philips, & quite a few silicon valley startups that have gone from being 2 people companies to 50 million dollars + companies
WHY SHOULD WE WORK TOGETHER?
- Experienced Teams & Battle-tested Technologies: Best technology solutions are possible with domain understanding experts
- Future-ready: Knoldus continuously accesses the modern tools & technologies to make sure that we are able to provide future-ready business solutions
- Distributed Agile Mindset: Curated a global distributed software development strategy called Knolway (XP & Scrum). Our engagements are 83% more successful than industry standards.
- Our Knowledge sharing & Community Focus: We have a proven track record sharing knowledge, working with the community, leading open-source projects, & participating in global events
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$100,000 +
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250 - 999
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$50 - $99 / hr
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CA, Mississauga
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The company started in 2012 after we launched several unique own products in the local market. Our passion for these products helped us accumulate enough experience and technological expertise, which we now offer to our clients around the world.
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$25,000 +
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50 - 249
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$25 - $49 / hr
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UA, Kharkiv
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We are an open-minded team of specialists who support each other and encourage professional growth. Together we complete challenges, improve our skills and provide top notch service.
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$10,000 +
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10 - 49
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$50 - $99 / hr
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HR, Zagreb
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Konstant Infosolutions is a pioneer mobile app and web development company that caters to your need for building a mobile app or a website from scratch or need some extra development muscle for your internal projects. Our Mobile & Backend teams are closely integrated and have years of experience working together. Taking care of both frontend and backend, we have experience in creating web apps working mainly with Python, Django, React Native, PhoneGap, Xamarin, Angular, ReactJS, NodeJS and cloud environments like AWS and more. Our custom software development and project delivery services include: User Experience (Interaction Design, Low-fidelity Prototyping), interface design (Visual Design, Motion, High-fidelity Prototyping), Product Research and Strategy (Visual Design Motion, High-fidelity Prototyping (functional)), Engineering(Web & Mobile Development, Backend Development, Hardware Prototyping), Emerging Technologies (AR/VR, Wearables (e.g. Smart Watch), Facial Recognition/ Computer Vision Machine Learning, Internet of Things (IoT), Blockchain, Conversational/Voice UI).
Konstant Infosolutions is a trusted application development company which is pioneers in building world-class apps for various industry niches. Our goal-oriented company with the ability to deliver high-quality solutions in key industries including education, real estate & property, on-demand, social networking, banking & finance, gaming, events & ticketing, travel & hospitality, eCommerce, transportation, food & restaurant, oil & gas, Wearables and tech, Internet of Things, Cloud technology for startups, SMBs and enterprises worldwide.
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$10,000 +
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50 - 249
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< $25 / hr
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IN, Jaipur
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In 2011, the Korah Limited team was founded in the Greater Toronto Area, Ontario, Canada to provide professional IT services for Canadian businesses such as Bell, CAA, Moneris and the Government of Canada. Throughout the years, the company began to shift its focus to a product-based company. As of 2017, the team was awarded the BCIP contract which allowed us to work with Service Canada and the IRCC. Officially, in 2018, the company became mainly product centered.
Korah is offering ccRobot, a conversational workflow platform that supports the creation and customization of an AI and ML powered chatbot without the need for programmers. Korah’s vision for ccRobot is to drive the operational economy, efficiency, and effectiveness of any organization by automating simple and repetitive workflows. All in all, Korah aims to enhance customer experience by offering standardized responses, increase worker productivity, and reduce labour costs for all of our clients.
In combination with ccRobot, Korah also offers professional IT services to provide training, consulting, and integration.
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$1,000 +
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10 - 49
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Undisclosed / hr
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CA, Markham
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We are constantly building connections based on customer demand. Contact us to request a new connection. We frequently work with developers and software providers to build new connections. If your application isn’t listed we can build a connection to most APIs in 10-30 days.
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$5,000 +
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2 - 9
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$100 - $149 / hr
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US, Portland
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Kott Software is a part of Kott Group of Companies, and is a fast growing technology firm with more than 100 clients, support offices in 4 countries and customers in 10 countries spread across 4 continents. We deliver amazing results, creating and building the next generation business solutions whether for the cloud or mobile. Kott Software is a global provider of strategic offshore software development services which includes Consulting, Development, Testing, Maintenance and Support for custom application development. The company's area of expertise lies in developing Cloud, SaaS and Mobile applications, Product Engineering, Platform migration and Enterprise Business Solutions. Kott Software is a long term partner you can trust.
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$50,000 +
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50 - 249
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< $25 / hr
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US, Gaithersburg
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Kozak Group is a custom software design and development firm with over 5 years of commercial experience building business-critical web and mobile applications. We offer various services including product development, architectural guidance, team building, and software development. We specialize in using JavaScript frameworks to build web and mobile applications for various industries, as well as E-commerce websites using Magento and Magento 2.
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$5,000 +
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10 - 49
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$25 - $49 / hr
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UA, Zaporizhzhia
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$100,000 +
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50 - 249
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$150 - $199 / hr
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US, Wilmington
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Our clients are spread across multiple Industry verticals like BFSI, Government, Manufacturing, Healthcare, Retail, Oil, Gas and Utility, Education, Entertainment and Technology. Our operations revolve around providing IT Services, Consultation and Solutions via On-site, Off-shore and Hybrid methodology
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$100,000 +
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250 - 999
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$25 - $49 / hr
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US, Iselin
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Kultprosvet is a reliable team of dedicated experts, ready to develop and support medium-sized and highly-loaded web & mobile projects.
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$1,000 +
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10 - 49
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$25 - $49 / hr
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UA, Dnipro
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Kunz, Leigh & Associates is a custom software development and business consulting company comprised of over 100 individuals who are dedicated to providing creative and disruptive solutions and opportunities for our employees, our clients, and the world. Here at KL&A, we love what we do. We design and develop innovative and creative solutions that help our clients improve their services to the community and further support their long-term goals.
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$10,000 +
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50 - 249
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$100 - $149 / hr
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US, Lathrup Village
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Kurve Marketing Group L.L.C. is a U.S based, world class digital marketing agency. We have been able to secure a standard and well–positioned office facility in a central business district in Boston – Massachusetts. We are a digital marketing company that is set to compete in the highly competitive digital marketing industry not only in the United States market, but also in the global market because our clientele base will not be restricted to just businesses and organizations in the United States. Kurve Marketing Group L.L.C. offers robust digital marketing services to both corporate organization and individuals.
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$1,000 +
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10 - 49
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$100 - $149 / hr
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US, Boston
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Our mission is to help businesses and startups of all sizes maximize their potential through custom software solutions. We take pride in the quality of our work and consider ourselves an extension of the businesses we humbly serve. Our goal is to create and develop the digital tools and assets needed for businesses to take their operations to a higher level. Our perspective on application development is unique and focuses on bringing expertise, reliability, maintainability, and value to our clients and their users.
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$25,000 +
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2 - 9
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$100 - $149 / hr
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US, Grand Rapids
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Our sole focus is to help businesses generate more leads and sales using a predictable approach with our Lead Generation System.
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$5,000 +
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2 - 9
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$100 - $149 / hr
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GB, York
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Since 2009, Labotec has successfully launched hundreds of businesses into the mobile world, dramatically increasing brand exposure and profit margins for you. Our clients are: Microsoft, American Airlines, Cancun International Airport, Porsche Design, Audi, and many more! Through intense research and development, our talented team creates mobile solutions for our partners and clients. We now stand as one of the most creative and successful mobile agencies. Labotec’s flexibility and a la carte approach allows our customers and partners to cost effectively implement a mobile marketing strategy that can help improve the way they do business. We’ll create an atmosphere of success for your business in the mobile space – an exploding market no business should ignore. Our team of mobile-savvy experts takes the time to research and understand every angle of your market, developing a strategy that increases your exposure and profit margins. Labotec understands that the mobile space will become an increasingly valuable part of oureveryday lives. We will be at the heart of that evolution, creating and keeping our finger on the pulse of mobile trends.
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Undisclosed
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2 - 9
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$50 - $99 / hr
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US, Aventura
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