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Boundary (YC W23) — The programming language for AI

Boundary is building BAML -- a programming language to build AI agents. We used to code in assembly, and moved on to C.

Boundary is a Y Combinator company in the Winter 2023 batch. Its directory entry describes it as: The programming language for AI. The founders listed are Vaibhav Gupta (Founder), Aaron Villalpando Gonzalez (Founder) (Y Combinator directory entry, March 7, 2023).

6 more companies from YC Winter 2023 ↓

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Boundary

New accelerator entry · 2023-03-07 · the record

Winter 2023
batch
10
people
Early
stage
United States of America
region
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What the record says

BatchWinter 2023
Announced2023-03-07
StageEarly
StatusActive
Team size10
IndustryB2B
Sub-industryB2B
SectorsArtificial Intelligence, Developer Tools, Generative AI, Machine Learning, AI
RegionsUnited States of America, America / Canada
BasedSeattle, WA, USA
HiringYes
Sitehttps://www.boundaryml.com
Previously known asGloo, Gloo Chat, Gloo

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Also in YC Winter 2023

Same batch, B2B first.

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In their words

Boundary is building BAML -- a programming language to build AI agents. We used to code in assembly, and moved on to C. From C, we moved on to higher level languages like Python. Now we are going from Python to natural language. What does the code look like when 50% of the business decisions is decided by an AI agent / prompts? How do you test these AI components? We made BAML to address these problems. BAML helps has built-in tools to test, observe, and work with structured LLM outputs / tool calling natively in the language 10x faster. With BAML you can also instantly parallelize LLM Calls, or react to certain events or changes in your pipelines, without having to write any boilerplate. It's like using 'React' for AI. BAML code can used from any other language -- providing a standardized way to organize and declare any LLM or AI code.

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What the Full Report on Boundary covers

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  2. Which Company This Is

  3. What They Do, And How The Money Works

  4. Who Runs It, And How To Reach Them

  5. The Money: Funding, Valuation, Runway

  6. Who Pays Them, And Who They Are Up Against

  7. Warning Bells

  8. Sources

    1 cited source found

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Boundary: Accepted into Y Combinator Winter 2023
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Permanent URL: https://mentionfox.com/funding/yc-boundary
Last updated 2026-10-20
Primary record: Y Combinator directory entry
Boundary (YC W23) — The programming language for AI. MentionFox, 2026-10-20. https://mentionfox.com/funding/yc-boundary