Top Custom Software Development Companies in Pennsylvania

Valyr

Veteran-owned Pittsburgh-area software company that modernizes legacy systems, builds custom applications and maintains them, with no offshoring.

• Custom Software Development
• Web Development
• API & Integration Development

Jarvus Innovations

Philadelphia civic tech consultancy building open-source transit data infrastructure, pipelines and analytics for public transit agencies and DOTs.

• Custom Software Development
• API & Integration Development

Rails Fever

Philadelphia Ruby on Rails consultancy that builds features, upgrades, maintains and rescues Rails applications for startups and product teams.

• Custom Software Development
• Web Development

Chariot Solutions

Software consultancy just north of Philadelphia building custom cloud applications, data platforms and AI agents, with healthcare and gaming expertise.

• Custom Software Development
• AI & Automation
• Mobile App Development

B-Three Solutions

Pittsburgh software firm building custom web, desktop and mobile applications on fixed-fee, fixed-timeline contracts for businesses and government.

• Custom Software Development
• Mobile App Development
• Web Development

Echo Gate Tech

Pittsburgh fractional CTO and software firm offering technical diagnostics and architecture advice, backed by a team that builds and modernizes software.

• Custom Software Development
• AI & Automation

Westmoreland Software

Youngwood, PA team building custom business software, mobile apps and QuickBooks and system integrations, with all development done locally.

• Custom Software Development
• API & Integration Development
• Mobile App Development

Rivers Agile

Software consultancy in the Pittsburgh area offering custom and mobile development, QA and testing, UX design and AI and XR work, plus managed IT.

• Custom Software Development
• AI & Automation
• Mobile App Development

Truefit

Pittsburgh custom software firm whose senior-led teams handle product strategy, design, engineering and QA for enterprises and growing software companies.

• Custom Software Development
• Product Design & Development
• AI & Automation

Curotec

Philadelphia-area agency building SaaS products, custom web and mobile apps with Laravel and Vue.js, using US and Latin American engineers.

• Custom Software Development
• Web Development
• Mobile App Development

Fynydd

King of Prussia software firm designing and building custom web, mobile and desktop apps, APIs and Umbraco websites for businesses.

• Custom Software Development
• Web Development
• Mobile App Development

Mile6

Philadelphia-headquartered digital product agency designing and building websites, apps and custom software for associations, healthcare and manufacturers.

• Web Development
• Custom Software Development
• Mobile App Development

Zivtech

Philadelphia web design and development agency building Drupal and WordPress sites and custom web applications for mission-driven organizations.

• Web Development
• Custom Software Development
• UX/UI Design

Arcweb Technologies

Philadelphia health tech studio that validates, designs and builds digital health products and AI features for health tech companies and providers.

• Product Design & Development
• Custom Software Development
• AI & Automation

ANTLR Interactive

Pittsburgh product studio that designs and builds iOS and Android apps, web applications and custom software in-house with a small senior team.

• Mobile App Development
• Web Development
• Custom Software Development

Pittsburgh Web Development

North Shore studio that designs and builds websites, ecommerce stores, mobile apps and custom software for Pittsburgh businesses with an in-house team.

• Web Development
• Custom Software Development
• Mobile App Development

Think Company

Philadelphia design and engineering consultancy that researches, designs, builds and modernizes complex business applications for large organizations.

• Product Design & Development
• UX/UI Design
• Custom Software Development