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    3. Boundary

    Boundary

    Build AI applications with confidence using type-safe, reliable AI pipelines and agents across any programming language and LLM provider.

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    At a Glance

    1Tool Listed
    4Products
    40Tool Views
    8Capabilities
    Discussions
    Seattle, WAHeadquarters
    2023Est.
    9Employees
    $130KRaised
    Focus Areas
    AI Development Libraries
    LLM Orchestration
    Prompt Engineering
    Connect
    Latest News
    BAML Launch Week 2025: Expanding AI Development CapabilitiesJan 27, 2025
    Tech Preview: Introducing Workflows in BAMLJun 1, 2024
    Markets
    • AI Engineers
    • Software Developers
    • Enterprise Tech Companies

    AI Tools by Boundary

    (1)
    View BAML
    BAML tool icon

    BAML

    Type-Safe LLM Function Builder

    AI Dev LibrariesLLM OrchestrationPrompt Engineering

    Discussions

    No discussions yet

    Be the first to start a discussion about Boundary

    Latest News

    01/27/2025

    BAML Launch Week 2025: Expanding AI Development Capabilities

    boundaryml.com
    06/01/2024

    Tech Preview: Introducing Workflows in BAML

    boundaryml.com
    04/01/2024

    Announcing Cursor support for BAML

    boundaryml.com
    02/01/2024

    Bringing Structured Outputs and Schema-Aligned Parsing to Golang, Java, PHP, and more

    boundaryml.com

    Products & Services

    4
    BAML (Boundary ML Language)
    2024

    A domain-specific language (DSL) for defining prompts, functions, and schemas with structured outputs and type safety.

    BAML CLI
    2024

    Command-line tool for initializing projects, generating native code, and running tests.

    BAML VSCode Extension
    2024

    Developer extension providing syntax highlighting, auto-completion, and live playground features for BAML.

    Multi-language SDKs
    2024

    Generated native libraries for Python, TypeScript, Ruby, Go, Java, and other languages.

    Market Position

    Boundary positions itself as the 'engineering' layer for prompt engineering, offering a DSL (BAML) that ensures type safety and reliability, contrasting with less structured template-based libraries.

    Leadership

    Founders

    VG

    Vaibhav Gupta

    Previously a software engineer at Microsoft and Google. Long-time builder, started building card games in 7th grade. CEO and Co-founder of Boundary.

    AV

    Aaron Villalpando Gonzalez

    Co-founder of Boundary. Background in engineering and project management. Navigated 12-13 pivots alongside Vaibhav.

    Executive Team

    VG

    Vaibhav Gupta

    CEO & Co-founder

    Ex-Microsoft, Ex-Google.

    AV

    Aaron Villalpando Gonzalez

    CTO & Co-founder

    Lead engineering and product vision through 12 pivots.

    Board of Directors

    VG
    Vaibhav Gupta
    Co-founder
    AV
    Aaron Villalpando Gonzalez
    Co-founder
    DC
    Dalton Caldwell
    Advisor (Y Combinator)

    Founding Story

    Founded by Vaibhav Gupta and Aaron Villalpando Gonzalez, Boundary navigated 12-13 'hard pivots' over several years (originally under the name Gloo) before creating BAML. The company was admitted to Y Combinator's W23 batch despite their frequent pivots, eventually finding success with BAML's focus on structured prompt engineering.

    Business Model

    Revenue
    $330K ARR reported in 2025.

    Revenue Model

    SaaS subscription model with tiered pricing (Free, Team, Enterprise). Open-core strategy focused on developer tools.

    Pricing Tiers

    Free
    $0/month

    Free forever, no credit card required.

    Team
    $25/month

    Includes advanced features, 14-day free trial, and priority support.

    Enterprise
    Custom

    Includes on-premise deployment, SSO/SAML, dedicated account manager, and SLAs.

    Private

    Target Markets

    Industries & Segments
    • AI Engineers
    • Software Developers
    • Enterprise Tech Companies
    Use Cases
    • Building reliable AI agents
    • Structured data extraction (e.g., resumes, logs)
    • Prompt engineering for production applications
    • Cross-language AI pipeline development
    Notable Customers
    • AI startups
    • Independent developers

    Quick Facts

    Headquarters
    Seattle, WA
    Founded
    2023
    Entity Type
    Inc.
    Employees
    9
    Total Funding
    $130K (Confirmed YC Seed)
    Investors
    Y Combinator, Basis Set Ventures
    Office Locations
    Seattle
    San Francisco

    Funding History

    Seed$130,000
    2023-03-01
    Y Combinator

    History & Milestones

    2025-01

    Held BAML Launch Week, announcing major features and integrations.

    2024

    Announced BAML (Boundary ML Language), a domain-specific language for AI prompt engineering.

    2023

    Company founded and joined Y Combinator's Winter 2023 (W23) batch.

    2023-2024

    Navigated over 12 pivots before finding traction with BAML (formerly known as Gloo).

    Key Capabilities

    8
    Type-safe AI responses
    Schema-driven prompts
    Multi-language native code generation
    Universal LLM support (OpenAI, Anthropic, Gemini, etc.)
    Testing framework for prompts
    Automatic retries and fallbacks

    Integrations & Partnerships

    Platform Integrations

    • Vercel
    • AWS Lambda
    • Google Cloud Functions
    • Azure Functions
    • Railway

    Key Partnerships

    Anthropic
    OpenAI
    Google (Gemini Support)

    Connect

    Website
    boundaryml.com
    GitHub
    BoundaryML
    X / Twitter
    boundaryml

    AI Topics

    3

    Boundary focuses on these topics:

    AI Development Libraries(1)
    LLM Orchestration(1)
    Prompt Engineering(1)
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