Mastra is a modern TypeScript framework designed for AI-powered applications and agents. It falls under the category of AI DevTools and focuses on simplifying the development of intelligent applications.

Mastra is primarily for developers looking to build AI-powered applications, internal automation agents, customer-facing agents, and workflow automations. It caters to those who need a robust platform for creating intelligent solutions.

What can I do with mastra?

With mastra, you can build AI-powered applications, configure observational memory for tailored project needs, switch between different AI models easily, and manage memory through a REST API. These capabilities enhance the development process and application functionality.

How much does mastra cost?

Mastra operates on a freemium pricing model. It offers free access to core features with no seat or usage tiers, while the Enterprise tier provides advanced features, custom solutions, and priority support.

How is mastra different from alternatives?

Mastra differentiates itself with its core feature, Observational Memory, which automatically manages context from conversations, simplifying development. As an AI DevTool, it focuses on providing a TypeScript framework specifically for AI applications, unlike many general-purpose development tools.

Does mastra have a free trial?

Mastra offers a freemium model, which allows users to access core features for free. Check mastra's site for current trial availability and details on the Enterprise tier.

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Data updated Jul 1, 2026 · Traffic data: SimilarWeb (estimated)

About mastra

Mastra is the modern TypeScript framework for AI-powered applications and agents.

Quick facts about mastra

mastra is an AI tool tracked by Relve in the AI SEO Tools category. It uses a Freemium pricing model and runs on the web at mastra.ai.

The Relve catalog tracks 400+ live tools in AI Operations Tools. mastra is part of the editorial tracking surface, with a Domain Rating of 43 on Ahrefs' authority scale.

Closest alternatives: Activepieces, Adaptor Die, Adept, Adereso, AG11 Lab. Compare mastra head-to-head with any of these on the /compare surface — same feature axes, pricing tiers, and traffic side-by-side.

Best for: teams looking for ai seo tools-class capabilities with a freemium entry point. The Relve editorial team refreshes traffic, ranking, and feature data for mastra on a rolling 24-hour cycle (last updated Jul 1, 2026), so the numbers above reflect the most recent snapshot of where the tool sits in the market. Traffic figures are SimilarWeb estimates.

Key Features

Memory Management

Observational Memory

Observational Memory is the gateway's core differentiator that automatically extracts and stores observations from every conversation. It injects relevant context into future requests, allowing your application to operate without any memory management code, thus simplifying the development process.

Memory Configuration

Users can configure observational memory per project in the Memory Gateway dashboard. This includes setting maximum token budgets for observation context and reflection summaries, allowing for tailored memory management based on project needs.

Memory API

The Memory API provides a REST interface for direct memory management, allowing users to create threads, retrieve conversation history, and inspect observations. This feature enhances control over memory usage and retrieval in applications.

Model Management

Model Selection

The gateway allows users to switch between different AI models by simply changing the model field in their requests. This flexibility eliminates the need for provider configuration or SDK changes, streamlining the integration process.

Bring Your Own Key

With the Bring Your Own Key (BYOK) feature, users can utilize their own provider API keys for direct access to various AI models while still benefiting from the gateway's memory and tool features. This option is available on the Teams plan and above.

Per-request Pass-through

This feature allows users to send a provider key with a single request instead of storing it. By passing the provider key in the Authorization header, users can maintain the functionality of memory features while using their own keys.

API Integration

API Compatibility

The gateway exposes three proxy endpoints that match the native API formats for OpenAI and Anthropic, ensuring seamless integration with existing SDKs or HTTP clients. This compatibility simplifies the transition for developers using these services.

OpenAI Chat Completions API

This feature supports the OpenAI Chat Completions format, allowing developers to use any OpenAI-compatible SDK or HTTP client for their applications. It ensures that developers can leverage existing tools without needing significant changes.

Anthropic Messages API

The Anthropic Messages API format is supported, enabling developers to authenticate using the x-api-key header or the Anthropic SDK. This feature facilitates integration with Anthropic's services while maintaining a consistent API experience.

OpenAI Responses API

This feature provides support for the OpenAI Responses format, which is designed for multi-turn, agentic workflows. It allows developers to implement complex conversational flows using the established OpenAI response structure.

Tool Integration

Gateway Tools

The gateway can inject server-side tools into requests, allowing models to access additional functionalities seamlessly. This feature enhances the capabilities of the models by providing them with tools that can be executed transparently.

Web Search

The web_search tool enables models to access current information from the web. Users can enable this tool per project in the dashboard or on a per-request basis, enhancing the model's ability to provide up-to-date responses.

Tool Header Overrides

The x-gateway-tools header allows users to control tool injection per request. This feature provides flexibility in enabling or disabling tools based on specific request requirements, ensuring optimal performance.

Streaming and Authentication

Streaming

All proxy endpoints support streaming, allowing developers to implement standard SDK streaming patterns without changes. This feature enhances the responsiveness of applications by enabling real-time data processing.

Authentication

The gateway supports two authentication modes: Direct and Pass-through (BYOK). This flexibility allows users to choose the authentication method that best fits their needs, whether using gateway-managed keys or their own provider keys.