# Outlines vs YYLO — Fit & Features

Canonical: https://trutool.co/compare/outlines-vs-yylo
Author: Snehil (https://trutool.co/authors/snehil)

Compare Outlines and YYLO by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### Outlines
Generate structured outputs from language models with schema constraints.
Best fit: Developers composing agents, structured model outputs, and tool workflows.
- Structured generation
- Schema constraints
- Model integrations
Before you choose: Check licensing, provider compatibility, maintenance, and tool permissions. Test failure recovery before enabling agent actions.
Pricing: https://dottxt-ai.github.io/outlines/latest/
- [Read Outlines profile](https://trutool.co/tools/outlines): Read Outlines profile

### YYLO
YYLO (why-lo): AI coding-agent orchestration CLI with equivalent yylo and yy launchers.
Best fit: People and teams evaluating ai agent frameworks for a specific workflow.
- Core product workflow
Before you choose: Test a representative task, inspect outputs, and confirm integrations, permissions, data handling, licensing, and current costs.
Pricing: https://github.com/pricing
- [Read YYLO profile](https://trutool.co/tools/yylo): Read YYLO profile