Top Software Development Companies in Seattle | September, 2026

At ModLogix, a legacy software modernization company, we focused on upgrading legacy technologies, including AngularJS and .NET. We offer our clients to move desktop solutions to the web, migrate to the cloud, re-engineer or re-architect legacy software, and insert APIs.Read More About ModLogix

Founded in 1999, Stanga is a trusted custom software development partner, delivering high-quality digital solutions for enterprises, startups, and agencies. With 26+ years of experience, we combine deep technical expertise with an agile approach to bring ideas from concept to execution.Read More About Stanga

TechCentera specializes in engineering intelligent, high-performance digital solutions for high-stakes industries. We bridge the gap between complex business challenges and scalable technology through custom software development and cutting-edge AI automation. We focus on mid-market leaders in Healthcare, Logistics, Real Estate, SaaS, and Fintech, delivering secure, data-driven systems that optimize operations and drive growth. At TechCentera, we don’t just build code.Read More About TechCentera

Full-cycle software engineering And AI development company powered by AI-accelerated delivery Read More About Devox Software

Welcome to AppsNation, the USA's leading mobile app development company based in Los Angeles. We specialize in iOS, Android, IoT, AR/VR, gaming, cross-platform, wearables, and eCommerce apps. Our expert team combines innovation and precision to deliver custom, high-impact mobile solutions tailored for your business. From development to QA testing and strategic design consulting, AppsNation is here to transform your vision into powerful digital experiences. Let’s build the future together!Read More About AppsNation

At Differenz System, we focus on providing a variety of web and app development solutions that have positively impacted our client's productivity and profitability. Our company is built on the foundation of three points: high performance, high productivity, and a healthy and energizing work environment.Read More About Differenz System

Binmile is a software engineering company that has helped businesses develop digital products and custom software solutions. An ISO-certified company that has been recognized as the 13th fastest-growing company by Deloitte.Read More About Binmile

Software Orca is a technology partner specializing in mobile apps, custom software, web platforms, workflow automation, and AI solutions. We help startups, SMBs, and enterprises transform ideas into scalable, user-friendly products. With an agile approach and client-focused process, we deliver innovative solutions that streamline operations, enhance engagement, and drive measurable growth while building lasting partnerships.Read More About Software Orca

Naked Development is a leading mobile app development company located in beautiful Irvine, CA which emphasizes on bringing innovative design and intuitive programming to the market. Our kickass, in-house team is made up of visionary artists and forward thinkers. Each of us bringing a wealth of knowledge and infectious personalities to the team, and together we bring your passions to life.Read More About Naked Development

Codevision Technologies is a trusted IT partner delivering innovative digital solutions, including SharePoint development, Power Platform services, and custom applications. With a focus on excellence and client success, we help businesses streamline operations, boost productivity, and embrace digital transformation.Read More About Codevision Technologies

We have a prominent team of developers & designers having extensive experience in their respective field. We are not just another offshore development agency but we are reliable technical partner for entrepreneur to small and mid size companies.Read More About SC Code

Cyfrania is a custom web and mobile development company. We make great custom software. Our services: Custom Software Development, Custom App Development, App Modernization, Mobile App Development, Web App Development, Software Project Rescue, Software Project Takeover, Microservices Development & ConsultingRead More About Cyfrania

A3Logics is a leading IT solutions provider, specializing in AI, Blockchain, and IoT. We deliver innovative solutions for product engineering, educational software, custom software, testing, maintenance, and re-engineering. Our expertise empowers businesses across industries, including Insurtech, Logistics, Retail, Education, and more, to achieve unparalleled efficiency and growth.Read More About A3Logics Inc.

Fortunesoft is a highend software product engineering and consulting company providing full cycle software development services for enterprises and startups. We build, improve and scale software products across platforms leveraging disruptive technologies in mobile, web, cloud, analytics, AI and blockchain.Read More About Fortunesoft IT Innovations

Cheesecake Labs is a software design and engineering partner that helps you build successful tech products. We know the process and empower a multidisciplinary team of 60+ designers, engineers, and project managers to collaborate with you and deliver delightful solutions.Read More About Cheesecake Labs