Our industry experts identified the leading software development companies in Illinois that build high-performance solutions. Explore the best developers in the table below and use the filter to choose the best fir for your budget and needs.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Unico Connect
VerifiedVerified by the DesignRush team for authenticity and credibility.Award WinnerRecipient of a Best Design Award for outstanding work.Your AI-Native Technology Partner
Unico Connect is a custom software development firm empowering startups and enterprises to build scalable, future-proof apps. Leveraging NoCode, AI, and full-stack expertise, we deliver fast, innovative solutions that drive growth across industries worldwide. Let’s build your next breakthrough together...
Top Services:
- AI Development
- Mobile App Development
- Software Development
- Web Development
- Staff Augmentation
- Show more
- Location
- Chicago, Illinois
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $35/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 14 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsUnico Connect Services
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Unico Connect Reviews & Testimonials

Software Development Review from Jacques Antikadjian
Unico Connect has been an exceptional development partner in helping us build PLCY, our AI governance and runtime policy-enforcement platform. From the beginning, their team took the time to understand not only what we wanted to build, but also the security architecture, governance requirements, workflows, and enterprise use cases behind the product. What impressed me most was their ability to take our security designs and technical workflows and translate them into a functional, scalable platform. PLCY requires much more than traditional software development it involves AI governance, policy enforcement, data protection, model and regional routing, auditability, and enterprise-grade security controls. UnicoConnect approached these requirements thoughtfully and worked closely with us to turn complex concepts into a real product. Their team has been responsive, collaborative, technically capable, and willing to work through difficult architectural and product challenges with us. They have treated the engagement like a true partnership rather than simply a development project. As a founder, it is extremely valuable to have a technology partner that understands the vision while also being able to execute on the details. Unico Connect has played an important role in helping bring PLCY from architecture and security designs into a working AI governance platform. I would highly recommend UnicoConnect to companies building sophisticated SaaS, AI, security, or enterprise software products.

Software Development Review from Daniel Gonsenhauser
Unico built our Order Management System across two operating companies and integrated it with Bringg for dispatch. The hard part wasn't the software, it was the business logic we run on-demand, multi-stop, scheduled contract, and distribution work across multiple markets, and the pricing exceptions that used to live in our people's heads are now configured in the system. Order intake, dispatch, commissions and billing are one flow instead of three, and our team reviews work rather than reconstructing it. What set Unico apart was their willingness to learn how a courier and freight business actually operates instead of fitting us to a template. We worked with a dedicated team on the Unico side - a project lead, developers, and QA with direct access throughout rather than everything routed through an account manager. We've engaged them for phase two.

Web Development Review from Shifa Sutar
We had a great experience working with Unico team for our Google Workspace migration and account setup. The entire process was smooth and well-managed. The team was extremely supportive, responsive, and guided us at every step, making what could have been a complex transition feel effortless. Highly recommend their services.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsWe Help Data Driven Companies Build Measurable Generative AI Solutions.
At Markovate, we specialize in transforming businesses through cutting-edge AI and digital solutions. Our commitment is to drive innovation and operational excellence in every project...
Top Services:
- AI Development
- Mobile App Development
- Blockchain
- Software Development
- Web Design
- Show more
- Location
- Schaumburg, Illinois
- Number of Employees
- Under 49
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 5 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMarkovate Services
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Markovate Reviews & Testimonials

AI Development Review from Citlali Gold
I wanted to say a big Thank You to Markovate. They have shown proficiency, dedication and commitment, that is far exceeded our expectations. We are incredibly grateful to find them and look forward to continuing to work together in future.

Blockchain Review from noble morgan
Markovate are passionate about building products for startups helping to shape ideas into reality. They have been more than a developer, a true partner to us, even supporting with fundraising. Equally, they built with minimal reliance, considering easy adoption by our developers when selecting a tech stack.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsSoftware, Mobile App, Games Development Company.
The App Founders is a recognized leader in the mobile app development industry that excels in building mobile apps to upscale your business and bolster your customer retention rate. Well transform your idea into a market-ready application on schedule and within budget...
Top Services:
- Mobile App Development
- Software Development
- eCommerce Development
- Product Design
- CRM Consulting
- Show more
- Location
- Niles, Illinois
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $70/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 16 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsThe App Founders Services
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The App Founders Reviews & Testimonials
Walter White's Review Sourced from Google
Initially, The App Founders showcased a pro-found grasp of blockchain technology and its practical applications. They adeptly elucidated intricate concepts in a manner that resonated with my non-technical background, facilitating smoother communication and active involvement in developmental discussions.
Dustin Wheeler's Review Sourced from Google
it was such a pleasure working with App Founders and just how easy and professional they were. I quickly realized how the industry is full of thirsty, needy bots and scammers I’m trying to get your attention, but tons of unsolicited phone calls and texts. Dealing with these guys was a breath of fresh and definitely showed up in value above all the rest.
Munna Alam's Review Sourced from Google
Got to say, The App Founders really impressed me! They totally nailed the design for my mobile game. Can't wait to team up with them again to make and promote the game. Definitely recommending them to anyone looking for top-notch game development services!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsEmpower your global transformation with Flexsin - Let's get you set up!
Flexsin is a certified Microsoft application development partner, known for its leading ASP.NET development services. Our team, based in India, is dedicated to delivering flexible, reliable, and customized web and enterprise applications that meet the unique needs of each enterprise...
Top Services:
- DevOps Consulting
- VR/AR
- Software Development
- Digital Marketing
- IT Services
- Show more
- Location
- Chicago, Illinois
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 5 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsFlexsin Services
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Flexsin Reviews & Testimonials
1 2's Review Sourced from Google
We hired flexsin technologies to build software for us in July 2022. They agreed to sign NDAs and all relevant paperwork. They prepared the NDA as they preferred it and sent it to us for review and signature. We reviewed the NDA and changed the Jurisdiction to UK and sent it back to them for a signature which they delayed in signing up to date. After they reviewed everything, they gave us an estimation of USD 17,000. They sent us a contract with upper price cap stating that any extra activities and costs incurred above the agreed upper price cap will be their responsibility and we as the client will have to pay nothing extra. They estimated the project will take 12-14 weeks. They started the project and assured us the NDA and Contract is getting sorted and they will send it over as soon as. Long story short flexsin Technology never honoured the contract and the price cap as the price started increasing past the price cap. It is now been 8 months since they started the project and they have not signed the NDA nor the Contract as agreed. We noticed they misspelt the names on the NDA and Contract. We asked them to rectify the spelling mistakes and they have refused asking us to Change the NDA that they wrote themselves to meet their interests. They are asking us to include on the NDA that UPwork will resolve disputes in relation to incorrect spellings on the paperwork and the NDA as if they are planning to make more mistakes. Up work is just a platform that brings developers and clients together, UPwork does not resolve spelling mistakes and unsigned paperwork. UPwork is NOT developing our software for us, we did NOT share the software information with UPwork, we shared information with Flexsins Technologies and above all Up work did NOT misspell or fail to sign the NDA or Contract, that was Flexsins Technologies mistakes to fix and NOT UPwork mistakes to fix. They are now asking to write another contract for more money probably with another price cap just to lure. They have agreed to send the assets back to us immediately. Updates of this review to follow on here, twitter, LinkedIn, IG, TikTok, and any other platform.
Liam Durbin's Review Sourced from Google
I have had a great experience with Flexsin. My small business is a bit of a niche (horse racing) but the team at Flexsin worked very hard to understand the nuances. Very impressive breadth of skills on the team. The support work they do for my small business on a monthly retainer has been good, as has their project work on a mobile app.
Dave Reynolds's Review Sourced from Google
I've been with Flexsin for 3 years now, and it's a great place to work. Talented technical staff and good management. After years of providing IT staffing solutions for US based companies with local personnel, I'm now able to save our clients a LOT of money by using the resources of our talented team of resources at our offshore development center instead.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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