Stack Factory

    Software so good
    you can't help but smile

    We build software for ambitious teams that want to move from business idea to a live product customers can use, fast.

    Book a Call
    12+
    Products Built
    10 Days
    To First Launch
    30-Day
    Fix Guarantee
    Our clients: NCEE, Longevity Strategists, Technosylva, Advisorpedia, Lineage, National Library of Medicine, PopTech, Scratch Advisors, Audible Sight, Voltage Control, Xometry

    Explore recent client work focused on real business outcomes

    Nightwatch + Shopify eCommerce

    Nightwatch + Shopify eCommerce

    Conversion rate optimization and web design

    Xometry + Manufacturing/Advertising

    Xometry + Manufacturing/Advertising

    3 parallel design sprints

    Audible Sight + Accessibility

    Audible Sight + Accessibility

    First launch version and a clear build plan

    Lineage CRM + Insurance Sales/Telephony

    Lineage CRM + Insurance Sales/Telephony

    End-to-end product design and build

    NCEE + Teacher Team Tools

    NCEE + Teacher Team Tools

    Education collaboration powered by AI

    Nightwatch + Shopify eCommerce

    Nightwatch + Shopify eCommerce

    Conversion rate optimization and web design

    Xometry + Manufacturing/Advertising

    Xometry + Manufacturing/Advertising

    3 parallel design sprints

    Audible Sight + Accessibility

    Audible Sight + Accessibility

    First launch version and a clear build plan

    Lineage CRM + Insurance Sales/Telephony

    Lineage CRM + Insurance Sales/Telephony

    End-to-end product design and build

    NCEE + Teacher Team Tools

    NCEE + Teacher Team Tools

    Education collaboration powered by AI

    From Idea to Live Product

    Our proven 4-step process turns your concept into a launch-ready product with a clear path to grow.

    Week 1: Strategy & DesignWeek 2: Build & Launch
    Day 0

    Discovery Strategy Session

    Leave with a clear customer profile, business model, and core value message.

    Day 3

    Product Blueprint Session

    Align on priorities, map key user actions, and leave with a clickable prototype.

    Day 6

    Workflow Build

    Refine the prototype into a working product connected to your team's real workflows.

    Day 10

    Launch & Handover

    Launch your first release with clear handoff guides so your team can run it confidently.

    2 Business Weeks · Ongoing feedback at every step

    Our Build Guarantee: We Stay Until It Works

    If something needs adjustment, we fix it at no extra cost. Once things are running smoothly, we keep improving and supporting growth with you long term.

    "Black Flag didn't just build a tool—they helped us reimagine a new way to deliver on our mission. In just eight weeks, they translated complex educational research into an AI-powered platform now we're partnered supporting school leadership across the country."

    Jason Dougal
    President & COO, NCEE

    "Partnering with this team accelerated discovery of new business logic. Their ability to translate ambiguity in new markets into working code is impressive."

    Suzanne Schmitt
    Founder, Longevity Strategists

    "Partnering with this team accelerated discovery of new business logic. Their ability to translate ambiguity in new markets into shipping code is impressive."

    Doug Heikkinen
    Founder CEO, Advisorpedia

    Everything You Need to Launch and Grow

    We build what you need to launch quickly and grow confidently, without rebuilding everything later.

    End-to-End Product Build

    We deliver complete product slices with customer-facing features and the systems behind them, ready for real use from day one.

    Security & Compliance Readiness

    When your market requires it, we help you prepare for standards like SOC 2 and HIPAA so sales conversations move faster.

    Growth Partner

    We support early sales conversations, monitor live product health, and set up polished demos so you can grow with confidence.

    Built Around Your Business

    We fit into your current tools and workflows, then build what your team and customers actually need.

    Transparent Pricing for Every Stage

    Choose the package that fits your needs and scale as you grow

    All Plans Include
    Secure login and account access
    Reliable data storage
    Behind-the-scenes systems and integrations
    Clear product handoff guides
    Full code ownership -- no lock-in
    Shared project tracker with weekly visibility
    Secure login and account access
    Reliable data storage
    Behind-the-scenes systems and integrations
    Clear product handoff guides
    Full code ownership -- no lock-in
    Shared project tracker with weekly visibility

    New Business

    Perfect for startups and accelerators

    $20,000
    two weeks, one launch version
    Launch-version build (2 weeks)
    Core feature build
    Foundational product design
    Works across mobile and desktop
    Launch support
    30-day fix guarantee
    Most Popular

    Growth

    For teams ready to grow

    $44,000
    + Monthly support
    Everything in New Business
    Advanced feature build
    Brand-aligned design system
    Connections to your existing tools
    Speed and reliability improvements
    Performance reporting dashboard
    3 months of improvements
    Priority support

    Enterprise

    For complex, high-growth products

    Custom
    Tailored to your needs
    Everything in Growth
    Dedicated team
    Solution design tailored to your business
    Complex system connections and automation
    Compliance and security support
    Service-level commitments
    Ongoing improvements
    24/7 support
    Book a call

    Buy now, pay later pricing available, book a call

    FAQs: Your Questions Answered

    Let's Get Started

    Tell us about your vision and we'll show you how to make it reality

    Get faster guidance and recommendations for your project

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