Best IT Outsourcing Companies in Washington

19 Companies - Rankings updated: July 24, 2026

DesignRush assesses agencies using expertise standards and verified client experiences to help you make better decisions. Certain agencies have paid placements.

United States × Washington ×

  • Probey Services

    World's #1 Rated & Reviewed App, Website & Software Development Company

    World's #1 Rated & Reviewed App, Website & Software Development Company

    Probey Services builds websites on WordPress and Shopify, iOS and Android apps, and web applications. The IT services firm has delivered 1,800+ projects across global markets. Best for small and mid-size businesses needing a cost-effective offshore development partner...  View Probey Services's portfolio  |  View all reviews

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • Web Design
    • WordPress Website Design
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    130 Projects Listed
    View Profile
    5.0 5.0 (109)
    5.0 5.0 (7)

  • Zazz

    Modern IT. Built Secure. Delivered Right.

    Modern IT. Built Secure. Delivered Right.

    Zazz is an IT services company offering managed services, cybersecurity, cloud, AI, and staff augmentation to enterprise clients. It has delivered projects for the Government of Ontario and Seattle Aquarium. Best for enterprises needing a full-stack IT partner across transformation and security...  View Zazz's portfolio  |  View all reviews

    Top Services:

    • Mobile App Development
    • IT Services
    • Software Development
    • Staff Augmentation
    • IT Compliance Solution
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $45/hr
    Portfolios Count
    36 Projects Listed
    View Profile
    5.0 5.0 (76)

  • Mobcoder

    AI-Native, Business-Ready Development Services. Engineered to Scale

    AI-Native, Business-Ready Development Services. Engineered to Scale

    At Mobcoder AI, certified engineers and data scientists help you identify high-ROI AI use cases and operationalize them at scale. With 150+ deployments, CMMI Level 3 certification and 12+ years of experience, we build AI solutions governed by design and model-agnostic frameworks...  View Mobcoder's portfolio  |  View all reviews

    Top Services:

    • Mobile App Development
    • AI Development
    • Software Development
    • Web Development
    • VR/AR
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    100 - 249
    Average Hourly Rate
    $55/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    14 Projects Listed
    View Profile
    4.9 4.9 (15)
    4.9 4.9 (11)

  • Wolfpack Digital

    Powerful Tech Products Start-to-End

    Powerful Tech Products Start-to-End

    Proud 2024 Webby Award winner in the Responsible AI category and winner of the European Technology Awards for App Development in 2021...  View Wolfpack Digital's portfolio  |  View all reviews

    Top Services:

    • Mobile App Development
    • Web Development
    • Software Development
    • Web Design
    • IoT
    • Show more
    Location
    Kirkland, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    68 Projects Listed
    View Profile
    4.8 4.8 (7)
    4.9 4.9 (32)

  • Aldridge

    Your Strategic Partner in IT Advancement

    Your Strategic Partner in IT Advancement

    Aldridge: The IT outsourcing partner that truly comprehends your business. With offices spanning TX and WA, we're your dedicated national ally, driven by technology's empowerment. Tailored strategies, swift solutions, and unwavering support define our commitment...  View all reviews

    Top Services:

    • Managed Services
    • IT Services
    • Cybersecurity
    Location
    Renton, Washington
    Number of Employees
    100 - 249
    View Profile
    4.8 4.8 (5)
    4.8 4.8 (131)

  • Matellio Inc.

    We Make the Impossible Case Possible.

    We Make the Impossible Case Possible.

    Matellio is a leading software engineering studio, recognized globally for delivering intelligent solutions powered by Artificial Intelligence and Machine Learning. We specialize in developing customized AI solutions tailored to various needs of businesses under different industry verticals...  View Matellio Inc.'s portfolio  |  View all reviews

    Top Services:

    • AI Development
    • IoT
    • DevOps Consulting
    • Cloud Consulting
    • Mobile App Development
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    26 Projects Listed
    View Profile
    4.1 4.1 (1)

  • Silver Linings Technology

    Every cloud deserves a silver lining.

    Every cloud deserves a silver lining.

    We think technology so you don't have to. We provide 24/7 help desk, project work, CIO strategy, cyber security and video surveillance. We can work with your existing IT Department or be your internal IT Department...  View Silver Linings Technology's portfolio

    Top Services:

    • Cybersecurity
    • IT Services
    • Managed Services
    • HR Outsourcing
    • Show more
    Location
    Vancouver, Washington
    Number of Employees
    Under 49
    Minimal Budget
    Under $1,000
    Portfolios Count
    4 Projects Listed
    View Profile

  • Jelvix

    GLOBAL TECH PARTNER FOR DIGITAL TRANSFORMATION AND SOFTWARE INNOVATION

    GLOBAL TECH PARTNER FOR DIGITAL TRANSFORMATION AND SOFTWARE INNOVATION

    Jelvix is a global tech partner with 15+ years of experience, empowering industry leaders and startups. With 450+ IT experts, we drive digital transformation across Europe, North America, Nordics, and Southeast Asia...  View Jelvix's portfolio

    Top Services:

    • Software Development
    • Mobile App Development
    • VR/AR
    • AI Development
    • IoT
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    500 - 999
    Average Hourly Rate
    $70/hr
    Portfolios Count
    10 Projects Listed
    View Profile

  • Grant Thornton

    IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    Grant Thornton LLP (US) is an IT, project management, audit, tax, AgTech, and BPO company headquartered in Chicago, Illinois with over 50 U.S. offices and access to a global network or member firms in over 135 countries. We offer a broad range of services in strategy and consulting, operations, technology and...  View Grant Thornton's portfolio  |  View all reviews

    Top Services:

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed
    View Profile
    4.5 4.5 (13)

  • Advisicon

    Achieve better with solid guidance

    Achieve better with solid guidance

    Advisicon is a distinguished consulting firm at the forefront of empowering businesses with transformative solutions in project management and modern workplace productivity...  View Advisicon's portfolio  |  View all reviews

    Top Services:

    • IT Services
    • Digital Services
    Location
    Vancouver, Washington
    Number of Employees
    50 - 99
    Portfolios Count
    5 Projects Listed
    View Profile
    4.5 4.5 (11)

  • SlickDigital

    Propel Your Business Forward

    Propel Your Business Forward

    SlickDevs is a premier custom software development company specializing in transforming innovative ideas into robust, scalable applications. With a dedicated team of experts, we provide comprehensive solutions tailored to meet the unique needs of tech startups, mid-market companies, and enterprise...  View SlickDigital's portfolio

    Top Services:

    • Mobile App Development
    • Software Development
    • Software Testing
    • Blockchain
    • IoT
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $100/hr
    Portfolios Count
    5 Projects Listed
    View Profile

  • AccelOne

    Accelone Advancing What's Possible

    Accelone Advancing What's Possible

    Embark on your digital transformation journey with AccelOne's Software Development delivery model, strategically designed for optimal outcomes. Initiate your digital transformation seamlessly through our comprehensive nearshore and US-based services...  View AccelOne's portfolio  |  View all reviews

    Top Services:

    • Software Development
    • Mobile App Development
    • Blockchain
    • UI/UX Design
    • eCommerce Development
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    100 - 249
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    5 Projects Listed
    View Profile
    4.2 4.2 (5)

  • BlackPoint

    Exceptional IT Solutions with Unmatched Customer Service.

    Exceptional IT Solutions with Unmatched Customer Service.

    Our mission is to deliver a crazy good customer service.We aim to provide effective, relevant, and reliable IT solutions to our clients, delivered with exceptional customer service and transparency from start to finish...  View all reviews

    Top Services:

    • Cybersecurity
    • IT Services
    • Managed Services
    • Cloud Consulting
    • Business Consulting
    • Show more
    Location
    Kent, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    View Profile
    4.9 4.9 (31)

  • 9series

    Handcrafted Technology Solutions

    Handcrafted Technology Solutions

    At 9series, we help organizations move beyond traditional software by building intelligent systems powered by AI...  View 9series's portfolio

    Top Services:

    • Mobile App Development
    • AI Development
    • IoT
    • Software Development
    • Cloud Consulting
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $40/hr
    Portfolios Count
    3 Projects Listed
    View Profile

  • Protiviti

    Global Business Consulting Excellence

    Global Business Consulting Excellence

    Protiviti is a global consulting firm that offers deep expertise, objective insights, and tailored solutions to empower leaders in tackling future challenges. With a comprehensive range of services spanning finance, technology, operations, data, analytics, governance, risk, and internal audit, we serve...  View Protiviti's portfolio  |  View all reviews

    Top Services:

    • Business Consulting
    • IT Compliance Solution
    • Big Data Analytics
    • IT Services
    • Cybersecurity
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    1000 & Up
    Portfolios Count
    5 Projects Listed
    View Profile
    5.0 5.0 (1)

  • Ataira Analytics Inc

    Cloud Software and Data Analytics.

    Cloud Software and Data Analytics.

    A US Based, Veteran Owned and Operated (SDVOSB), Microsoft Partner and Cloud Solution Provider. Serving Government, Public, and Private Organizations with Business Reporting Consulting Solutions, Security and Migration Services, and Cloud Management and Productivity Software...  View Ataira Analytics Inc profile

    Top Services:

    • Big Data Analytics
    • Managed Services
    • Cloud Consulting
    • Software Development
    • Web Development
    • Show more
    Location
    Gig Harbor, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $60/hr
    Minimal Budget
    $1,000 - $10,000
    View Profile

  • Sheridan Technologies

    Delivering Unparalleled Results

    Delivering Unparalleled Results

    Sheridan Technologies is a renowned company specializing in software, hardware and product development services. Sheridan Technologies is committed to delivering unparalleled results that surpass your expectations...  View Sheridan Technologies profile

    Top Services:

    • Software Development
    • AI Development
    • Product Design
    • Mobile App Development
    • IoT
    • Show more
    Location
    Vancouver, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr
    View Profile

  • Cycrest Systems

    One Call Total Service

    One Call Total Service

    Cycrest offers you options, from a full service outsourced IT department solution, backing up and supporting your organizations in-house IT department or even placing support personnel at your location,...  View all reviews

    Top Services:

    • IT Services
    Location
    Spokane, Washington
    Number of Employees
    Under 49
    View Profile
    4.9 4.9 (74)

  • Persistent

    See Beyond, Rise Above.

    See Beyond, Rise Above.

    Persistent Systems, a renowned global leader in software product development and technology services. Delve into our innovative offerings to stay ahead in the ever-evolving landscape of technology...  View all reviews

    Top Services:

    • AI Development
    • Software Development
    • Web Development
    • Mobile App Development
    • Blockchain
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $50,000 & Up
    View Profile
    4.6 4.6 (730)

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About The Author and Expert Reviewer

Content Specialist

selina@designrush.com

Selina Garcia has authored 500+ articles and edited 50+ published books in economics, law, and history. Her unique blend of experiences allows her to approach content creation from a well-rounded perspective. Currently, Selina applies her expertise to producing insightful articles on IT, software, and applications for DesignRush.

Former Development Director

spotlight@designrush.com

Sergio is a technology leader with over six years of experience managing global teams and delivering projects across fintech, sportstech, and B2B platforms. At DesignRush, he drove product growth and development execution, building tools that speed up processes by 95% and cut costs by 35% while maintaining full uptime.

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