Boundary Review 2026
The First Language for Building Agents
What is Boundary?
The input domain resolves to BAML, an open-source programming language for building reliable AI agents and LLM pipelines with type-safe interfaces and structured outputs. It works with every LLM provider and generates native code in Python, TypeScript, Ruby, and Go.
Best for
Mixed
Use cases
- Building AI agents
- LLM pipeline reliability
- Structured data extraction
Key features
Type-safe AI interfaces
Structured outputs
VSCode extension and testing playground
CI/CD agent testing
Pricing
Model
free
Price range
Open-source
Free tier
Yes
Integrations
Boundary integrates with 4 tools including:
PythonTypeScriptRubyGo
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