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Mastra Studio

Developer tool

by Mastra

A shared workspace where a team inspects agent runs through traces and cost, latency and quality metrics, scores outputs with LLM-as-judge or code, runs dataset experiments and versions prompts and agent configurations, open to non-engineering reviewers without source access.

Find alternatives to Mastra Studio

What it does

• Evaluation and observability

Features 5

• Team CollaborationShares traces and gathers expert feedback to iterate on prompts with the team.
• AuthenticationLocks down Studio with role-based access controlling who can view, edit and execute.
• Agent TestingTests agents by switching models, tweaking settings and trying different inputs.
• ScorersScores outputs with LLM-as-Judge or code, online in production or retroactively on traces.
• Datasets and ExperimentsBuilds regression sets from production traces and runs experiments after every change.

Sources

Pricing

Pricing page · 10 Oct 2026

Mastra Platform plan cards: Starter "$0/ month" ("Free for everyone"), Teams "$250/ month", Enterprise "Custom pricing"; the comparison table prices each platform product row by row on all three plans. Studio rows carry no meter of their own.

Description

Official documentation · 10 Oct 2026

The page lists traces, logs and metrics on costs, latency and quality, scoring with LLM-as-Judge or code, datasets and experiments, prompt editing and saved agent versions, and role-based access for reviewers who do not touch the source.

What it does

Official documentation · 10 Oct 2026

"Observe, Evaluate and Improve Your AI Agents".

Security

Official documentation · 12 Oct 2026

Page: 'When you also configure an RBAC provider, Studio enforces role-based access control'.

Sold within

Pricing page · 10 Oct 2026

The Mastra Platform comparison table has a Studio section on every plan (Users "Unlimited", Deployments "Unlimited" on Starter and Teams, "Custom" on Enterprise); the platform docs call Studio one of the platform's "three products". Studio also runs locally with the open-source framework at localhost:4111; the hosted platform is the route the pricing page sells.

Name

Official documentation · 10 Oct 2026

"Mastra Studio gives your team a shared workspace to monitor performance, refine prompts and collaborate on agent quality."

URL

Official documentation · 10 Oct 2026

Mastra's own page for Studio, headed "Observe, Evaluate and Improve Your AI Agents".

Deployment

Official documentation · 10 Oct 2026

"Self-hosted Studio connects to your own Mastra instance. The hosted Platform adds project and deployment management."

Interfaces

Official documentation · 10 Oct 2026

A web workspace, local at localhost:4111 or deployed behind a URL.

Modalities

Official documentation · 12 Oct 2026

Page: 'Import items from CSV or JSON and define input and ground-truth schemas / To download the table as CSV, open the arrow beside the copy button and select Download CSV'.

Also from Mastra

• Mastra Developer tool

  An open-source TypeScript framework that developers use to build, run and observe AI agents and workflows, with a hosted Studio and cloud deployment option.

• Mastra Platform Observability Infrastructure service

  Hosted telemetry store for Mastra agents in production: it keeps the metrics, structured logs and step-by-step traces of model calls, tool calls and workflow steps for every run, with dashboards for cost, latency and quality scores.

• Mastra Server Infrastructure service

  Hosted deployment target that runs a Mastra application's agents, tools and workflows as an API server from one command, with routing and scaling handled by Mastra and billing by CPU time and data egress.

• Mastra Gateway API service

  An OpenAI- and Anthropic-compatible model gateway that routes one API key to 300+ models with provider failover, and adds observational memory that compresses each conversation into notes so agents keep context without rebuilding it.

• Mastra Agent Builder Agent platform

  A UI mounted inside a team's own Mastra server for creating and operating internal agents, with multi-tenant workflows, role-based access and channel integrations, licensed for production under Mastra's enterprise licence.

• Mastra Factory AI agent

  An open-source software delivery environment where coding agents take a connected repository's issues through investigation, planning, implementation and review to a reviewed pull request, with people deciding at each step; self-hosted or deployed on Mastra's platform.

• Mastra Code AI agent

  An open-source terminal coding agent with Build, Plan and Fast modes and explore, plan and execute subagents, whose observational memory compresses the session into notes instead of compacting it, so long sessions keep their context.

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