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Boundary

boundaryml.com · San Francisco, CA (legal address); Seattle, WA (YC listing) · founded ~2021 (5 years prior to blog post Dec 2025); YC W23 batch Jan 2023 · team Vaibhav Gupta, Aaron Villalpando, Sam Lijin, Antonio Sarosi, Paulo Rossi, Kai Orita, Avery Townsend, Dhilan Shah (plus 2+ more based on '10 employees' YC listing) · Y Combinator W23 (Winter 2023 batch); bootstrapped/self-funded based on blog narrative; no significant external funding mentioned · trust 0/4

BAML is the programming language for agents

This dossier was built by Clark from a public scan on 2026-07-04 and is unclaimed. Is this your startup? Claim it.

Verified facts

Company NameBoundary ML, Inc. (doing business as 'Boundary')
source: https://boundaryml.com/tos
Product TaglineBAML is the programming language for agents
source: https://boundaryml.com
HeadquartersSan Francisco, CA (legal address); Seattle, WA (YC listing)
source: https://boundaryml.com/tos; https://www.ycombinator.com/companies/boundary
Founding Year~2021 (5 years prior to blog post Dec 2025); YC W23 batch Jan 2023
source: https://boundaryml.com/blog/5-years-12-pivots
Team MembersVaibhav Gupta, Aaron Villalpando, Sam Lijin, Antonio Sarosi, Paulo Rossi, Kai Orita, Avery Townsend, Dhilan Shah (plus 2+ more based on '10 employees' YC listing)
source: https://boundaryml.com/who-are-we; https://www.ycombinator.com/companies/boundary
Startup StageY Combinator W23 (Winter 2023 batch); bootstrapped/self-funded based on blog narrative; no significant external funding mentioned
source: https://boundaryml.com/blog/5-years-12-pivots; https://www.ycombinator.com/companies/boundary
FoundersVaibhav Gupta (Co-founder & CEO), Aaron Villalpando (Co-founder & CTO)
source: https://boundaryml.com/who-are-we
Legal EntityBoundary ML, Inc., Delaware corporation (Delaware law governs TOS)
source: https://boundaryml.com/tos
Public Contact Emaillegal@boundaryml.com
source: https://boundaryml.com/tos

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