Top 10 Ruby on Rails Companies in Denver – Updated 2025

21Twelve Interactive is a creative product development agency founded in 2016. Based in Denver, Colorado. The team of more than 10 employees is specialized in the development of personalized mobile applications and UX / UI. They serve mainly small businesses in the computer, entertainment and business services sectors. 21Twelve Interactive assists an IT company by managing the increase of remote staff for web and mobile development tasks. The team also migrates a Web SDK to iOS and Android and bridges the gaps required to provide complete solutions. The client is satisfied with the work of the team.

SmartApp is a full-cycle software development agency. We are a team of expert developers, talented designers, and affable managers. For almost 5 years, we help clients from all over the world grow businesses with exceptional and smart web solutions.

Volare Software is a custom software development company. We build high-quality web and mobile apps that run fast and look great on every device. We are small, friendly, and easy to work with. Since 2009, we’ve been delivering software solutions for our clients like the Air Force, AT&T, Kaiser Permanente, Jeffco Public Schools, Amerit Fleet Solutions, Larimer County, and more.

Fruition isn’t a good fit for everyone. We aren’t task completers. We aren’t drones. We’re a team of talented thinkers who want to embed ourselves as a partner – an extension of your team. That means challenging current efforts and being proactive about trying new things. We pride ourselves not just on our longevity, helping clients grow since 2003, but in the longevity of our client relationships.

Big Orange Planet is an award-winning Denver web design and development agency. We are a well-rounded team that can handle any project from start to finish, including graphic designs or SEO campaigns in addition to our main business service: website development. Since 2002, we have created highly-protected websites that aren’t based on templated systems with their inherent weaknesses.

Sidekick Web Studio is a web development firm with offices in both Denver, CO, and Charlotte, NC. We specialize in custom website development, e-commerce store development, and HTML email design. We believe templates are boring and rarely achieve the look and feel your business requires to stand out online. That’s why we’ve made custom websites both attainable and affordable for businesses of any industry or size.

Never Settle is globally recognized as a leader in technology & marketing solutions for both web and mobile applications. We serve both enterprise and small businesses through impactful user experiences leveraging technology and marketing solutions to help you BUILD A BIGGER STORY that drives results for your business, at a price you can afford.

PCG Systems is a dynamic Denver-based managed IT services provider, specializing in end-to-end IT support, cyber security, digital marketing & website design. For over a decade, we’ve taken businesses to the next level through a proven blend of strategic and creative services. From IT support & IT consulting to web development & search engine optimization, our core focus is helping companies accomplish more.

Established in 2009, Fyresite brought together a unique group of like-minded designers, software engineers, and marketing specialists. Our team is well-versed in solving difficult design and technical challenges such as product branding, app-to-hardware integrations (internet of things), and data visualization.

Iflexion has been helping companies across various industries optimize their business processes through custom software solutions. With a well-coordinated team of 850+ IT professionals, Iflexion serves its customers worldwide regardless of their operation domain, geographical location, and organizational specifics. Iflexion addresses the IT needs of companies of all sizes, ranging from startups to large enterprises.