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Boundary (YC W23) — The programming language for AI

Boundary appears in Y Combinator's company directory in the Winter 2023 batch, listed 2023-03-07. The programming language for AI.

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Boundary: Accepted into Y Combinator 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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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.

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

The full profile

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If you're behind Boundary: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. FoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.

Sourced from the company's Y Combinator directory entry.

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Permanent URL: https://mentionfox.com/funding/yc-boundary
Last updated 2026-09-26
Primary record: Y Combinator directory entry
Boundary (YC W23) — The programming language for AI. MentionFox, 2026-09-26. https://mentionfox.com/funding/yc-boundary