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Mastra

The leading TypeScript agent framework·mastra.ai

Mastra is an open-source TypeScript framework for building AI-powered applications and agents. It provides AI primitives including agents, workflows, workspaces, memory, MCP servers, observability and evals for TypeScript and JavaScript developers. It integrates with frontend and backend frameworks like React, Next.js and Node, or can be deployed anywhere as a standalone server.

What it's for

Conversational agents for customer support, onboarding, or internal queriesDomain-specific copilots for coding, legal, finance, research, or creative workWorkflow automations that trigger, route, and complete multi-step processesDecision-support tools that analyze data and provide actionable recommendations

Features 16

Authoring of Model Context Protocol (MCP) servers
Browser automation via AgentBrowser, Stagehand, and Firecrawl
Built-in deployers for Vercel, Netlify, and Cloudflare
Built-in observability: traces, metrics, logs, evals, experiments, scorers, datasets
Channel adapters for Slack, Microsoft Teams, Discord, Telegram, WhatsApp, and iMessage
Graph-based workflow engine with .then(), .branch(), and .parallel() control flow
Guardrails to process inputs/outputs and help prevent prompt injection
Harness for coordinating multi-mode agents with shared state and storage
Human-in-the-loop workflow suspend/resume with persisted execution state
Mastra Studio for monitoring, iterating, and collaborating on agents
Model routing across 90+ AI providers through one standard interface
Observational memory, semantic recall, and working memory for agents
Persistent agent workspace filesystem and sandboxing
Standalone server powered by Hono, or integration with existing servers
Subagents support and A2A/ACP agent-to-agent protocols
Typed agents combining models, tools, instructions, and runtime behavior

At a glance

free tieropen sourceself-hostableAPI

TypeLibrary / SDK

DeploymentHybrid

PlatformsWeb

Fordevelopers, TypeScript developers, JavaScript developers

CompanyKepler Software Inc · 2024

Integrations

OpenAIAnthropicGeminiVercelNetlifyCloudflareNext.jsReactNode.jsHonoExpressFastifySlackMicrosoft TeamsDiscordTelegramWhatsAppiMessageAuth0Better AuthClerkFirebaseOktaGoogleMongoDBStagehandFirecrawlLibSQLPostgres

Complianceself-reported

SOC 2

Resources

Pricing

The Mastra Platform's Starter and Teams tiers charge a flat monthly base fee plus numerous metered overage rates (observability events, CPU time, data egress, gateway token markup of market rate + 5.5%, memory tokens, storage, database compute). Enterprise tiers on both the platform and self-hosted license tracks are custom-quoted.

Starter (Mastra Platform)Free

Self-hosted cloud-platform starter tier with usage-based overages.

100K observability events, 24 CPU hours, 15 days data retention, 1GB platform data storage

Teams (Mastra Platform)$250/mo

Multiple teams, SSO, and SOC 2 docs

1M observability events, 250 CPU hours, 6 months data retention, 100GB platform data storage, multiple teams, SSO, SOC 2 docs

Enterprise (Mastra Platform)Quote

Quote-based custom pricing; contact sales.

Custom volume and retention

Free (Self-Hosted, Apache 2.0)Free

Build and host agents anywhere under the Apache 2.0 open-source license.

Enterprise (Self-Hosted License)Quote

Licensed under the Mastra Enterprise License; custom pricing via sales.