# Mastra: workflows, use cases, and stacks

> TypeScript framework for agents and workflows. Useful for explicit steps, tool calls, and evaluation in an existing JavaScript product; model and hosting costs are separate.

- Canonical: https://gptnavi.com/tools/mastra
- Official website: https://mastra.ai/
- Category: Developer automation
- Pricing model: Open source
- Has free plan: Yes
- Last materially updated: 2026-09-06
- Best for: TypeScript developers
- Tags: developer automation, weekly-picks, 2026-09-06

## Quick answer

Mastra is a open source developer automation option best suited to TypeScript developers. In the GPTNavi catalog it connects to 1 workflows and 1 compatible stacks.

## Workflows using Mastra

- [Build structured AI extraction with a held-out evaluation](https://gptnavi.com/workflows/structured-ai-extraction-with-held-out-evaluation) — Extract typed fields from approved documents and compare accuracy, retries, latency, and cost before connecting the result to business systems.

## Compatible stacks

- [Build structured AI extraction with a held-out evaluation: tool stack](https://gptnavi.com/stacks/structured-ai-extraction-with-held-out-evaluation-stack) — Extract typed fields from approved documents and compare accuracy, retries, latency, and cost before connecting the result to business systems.

## Nearby tools in the same category

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- [Replicate](https://gptnavi.com/tools/replicate)