Mastra review

Mastra is the strongest pick for teams that write TypeScript. The open source framework, licensed under Apache 2.0, covers agents with models, tools, memory and instructions, durable workflows with typed control flow, and observational memory that keeps context across sessions. A model router connects to 40+ providers through one interface, using simple provider/model strings. The hosted Mastra Platform adds observability, deployments and Studio. Its free Starter tier includes 100K observability events, 24 CPU hours and 15 days of retention with unlimited users and projects, which is generous for testing. The step up is steep: Teams costs $250 a month for 1M events, 250 CPU hours, six months of retention, SSO and SOC 2 documents, and extras such as a 24/7 persistent server cost $100 per project. Enterprise features for self-hosting, including RBAC and SSO, sit under a separate commercial license. Python teams should look elsewhere.

Who it is for

TypeScript and Node.js teams that want agents, durable workflows and hosting from one vendor.

Price

Framework free (Apache 2.0); Platform Starter free; Teams $250 per month.

Teams For growing teams $250 / month
Quoted from the vendor pricing page on November 6, 2026.

Key features

• Agents defined with models, tools, memory and instructions
• Durable multi-step workflows with typed control flow
• Observational memory that persists context across sessions
• Model routing to 40+ providers through one interface
• Hosted platform with observability, deployments and Studio

Strengths and weaknesses

• Strength: Built for TypeScript from the start
• Strength: Starter plan includes 100K observability events and 24 CPU hours free
• Strength: Unlimited users, deployments and projects on Starter
• Weakness: No Python version
• Weakness: The first paid tier jumps to $250 a month
• Weakness: Some self-hosted enterprise features need a separate license

Key facts

• License: Apache 2.0 framework, enterprise license for some self-hosted features
• Starter: $0, 100K events, 24 CPU hours, 15-day retention
• Teams: $250 a month, 1M events, 250 CPU hours, 6-month retention
• Gateway tokens: Market rate plus 5.5%

Where it ranks

Mastra is No. 7 in our Best AI Agent Frameworks verdict.