BAML Blog · Dec 2025
Vaibhav Gupta reflects on Boundary’s pivots and reiterates that BAML is the company’s current product focus.
Company research
Public company, workplace, funding, and market signals
Overview
Boundary is a Seattle-based startup building BAML, an open-source programming language and toolchain for making LLM outputs more reliable and type-safe, with built-in structured output handling, testing, and observability.
Primary product
BAML (Basically A Made-up Language)
Founded
2023
Headquarters
Seattle, Washington, United States
Team size
1-10
Industry
Technology, Information and Internet
Sub-industry
AI developer tools / programming language for LLM applications
Offices
1500 4th Avenue, Seattle, WA 98101
Business model
open-source core
SaaS / cloud
enterprise software
freemium
Funding
Stage
Seed
Total raised
$625K
Latest round
Seed · Apr 2023
Latest amount
$500K
People & investors
Work & culture
Small team focused on rebuilding software foundations for an AI-centric world; hiring materials emphasize working on hard product/system problems, clear writing, patient debugging, and making AI software less fragile.
Compensation
Public YC hiring post for engineers in Seattle listed $100K-$180K salary, 0.15%-0.75% equity, and openness to new graduates.
Product & market
Pricing
Freemium/open-source core plus paid cloud and enterprise tiers
Differentiators
- —Typed DSL for LLM workflows instead of a prompt-string library
- —Compile-time guarantees and schema-aligned parsing
- —Built-in testing, playground, and fast iteration loop
- —Multi-language generated clients
- —Works with models even when native function calling is missing or weak
- —Open-source core with optional hosted/enterprise offerings
Technology
Rust
TypeScript
Python
Go
Ruby
Java
C#
VS Code extension
CLI
language server
ClickHouse
Customers
MuckRock
Vetrec
Enterprise Knowledge
YC startups
mid-market enterprises
nonprofits
Competitors
LangChain
LlamaIndex
Instructor
Outlines
Marvin
Vellum
Scale & contact
Estimated revenue
≈$330K ARR (estimated)
Estimated monthly visits
27.3K
Traffic estimate as of Oct 2025
Latest news
ClickHouse · May 2025
ClickHouse profiles how Boundary uses BAML with ClickHouse for observability and production workflow analytics.
SuperDataScience · Feb 2025
Interview with Vaibhav Gupta covering BAML, AI cost savings, and Boundary’s hiring approach.
BAML Blog · Jan 2025
Launch week wrap-up covering the 1.0 roadmap, open-source posture, and community plans.
BAML Blog · Jan 2025
Official launch week announcement for BAML 2025 and the company’s roadmap.
Jobs and careers at Boundary
0 jobs at Boundary
No open positions
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