Mastra

Mastra is a TypeScript framework designed for building, testing, and deploying AI agents and workflows. It provides built-in memory management, observability tools, metrics, traces, and server capabilities to help developers take prototypes into production environments. The platform allows developers to define typed agents with instructions, models, tools, and runtime behavior in one place.

• Define typed agents with instructions, models, tools, and runtime behavior in one place
• Compose typed steps, retries, and branches into production workflows your team can inspect and ship
• Coordinate multi-mode agents with shared state, threads, and storage through a harness
• Give agents durable context with observational memory, semantic recall, and thread-aware storage
• Register agents and workflows on one Mastra server, run locally, and deploy the same app to Mastra Cloud
• Track latency, cost, model calls, and tool usage across production agent runs with built-in observability traces and metrics
• Score agent runs against repeatable checks using evaluations and experiments before changes reach production
• Capture traces and user feedback into versioned datasets for repeatable evaluation

Pros

• Provides a unified TypeScript framework for both defining agent behavior and executing multi-step workflows
• Includes built-in observability features such as traces, metrics, logs, evals, and experiments for tracking runtime execution
• Offers memory management capabilities including semantic recall, observational memory, and thread-aware storage
• Supports flexible deployment options ranging from a free self-hosted open source tier to cloud deployment and enterprise plans

Cons

• The Starter tier is limited to 100K observability events and 24 CPU hours per month before usage-based add-on charges apply
• Data retention on the Starter tier is capped at 15 days
• Advanced team and enterprise features such as SSO, SOC 2 documents, and role-based access control require moving to paid tiers
• Custom volume, uptime SLAs, and dedicated support require contacting sales for Enterprise pricing

Mastra fits developers and engineering teams building AI agents and applications in TypeScript who want to move from local prototypes to production deployments with built-in observability and memory. It is a poor fit for teams not using TypeScript or those looking for a fully no-code agent builder platform without code-level configuration.

Mastra offers an open source framework under an Apache 2.0 license that is free to use. For the Mastra Platform, the Starter tier is free for everyone at $0 per month, including 100K observability events, 24 CPU hours, and 15 days of data retention, with additional events priced at $10 per 100K and CPU time at $0.35 per hour. The Teams tier costs $250 per month for growing teams, providing 1M observability events, 250 CPU hours, 6 months of data retention, multiple teams, SSO, and SOC 2 docs, with additional events at $8 per 100K and CPU time at $0.25 per hour. The Enterprise tier features custom pricing with custom volume, retention, RBAC, audit logs, support, uptime SLAs, and a dedicated support engineer, alongside a self-hosted enterprise option with predictable flat annual fee pricing.

Unlike general-purpose programming libraries, Mastra provides a dedicated TypeScript framework that tightly integrates agent definitions, typed multi-step workflows, thread-aware observational memory, and native observability traces directly into a single codebase. It combines runtime execution primitives with built-in evaluation tools and server capabilities to bridge the gap between local prototyping and cloud production environments.

Mastra works with TypeScript, LibSQLStore for harness storage, and supports models like openai/gpt-5.5.