---
title: "Mastra vs OpenAI Agents SDK: Which is Better in 2026? | App Stack Builder"
description: "Mastra vs OpenAI Agents SDK compared for 2026 — pricing, free tiers, features, pros & cons. See which agent framework tool is the better fit for your startup."
source: https://appstackbuilder.com/compare/mastra-vs-openai-agents-sdk
retrieved: 2026-09-12
---

Agent Framework

# Mastra vs OpenAI Agents SDK: Which is Better in 2026?

Choosing between [Mastra](https://appstackbuilder.com/tools/mastra) and [OpenAI Agents SDK](https://appstackbuilder.com/tools/openai-agents-sdk)? Both are popular agent framework tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Quick verdict

Both Mastra and OpenAI Agents SDK are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

## Mastra vs OpenAI Agents SDK — Side by Side

|                | Mastra                    | OpenAI Agents SDK         |
| -------------- | ------------------------- | ------------------------- |
| Category       | Agent Framework           | Agent Framework           |
| Pricing        | Free                      | Free                      |
| Starting price | Free tier available       | Free tier available       |
| Free tier      | ✓                         | ✓                         |
| Rating         | 4.6                       | 4.5                       |
| Best for       | Agent Framework — ai, llm | Agent Framework — ai, llm |

## Pros & Cons

![Mastra](https://www.google.com/s2/favicons?domain=mastra.ai&sz=128)

[Mastra](https://appstackbuilder.com/tools/mastra)

* ✓Best-in-class for TypeScript teams
* ✓Batteries-included (agents, workflows, memory, evals)
* ✓From the experienced Gatsby team
* ✓Strong observability & MCP support
* ✗Younger than Python frameworks
* ✗TypeScript-only ecosystem

![OpenAI Agents SDK](https://www.google.com/s2/favicons?domain=openai.github.io&sz=128)

[OpenAI Agents SDK](https://appstackbuilder.com/tools/openai-agents-sdk)

* ✓Very low boilerplate, fast to ship
* ✓Production-ready with tracing
* ✓Backed by OpenAI
* ✓Python & TypeScript support
* ✗Best experience tied to OpenAI models
* ✗Lighter on complex orchestration than LangGraph

## Key Features Compared

### Mastra

* ✓TypeScript-native agents & workflows
* ✓Memory & semantic recall
* ✓Evals & observability
* ✓MCP tool sharing
* ✓3,300+ models via providers

### OpenAI Agents SDK

* ✓Agents, tools & handoffs
* ✓Guardrails & validation
* ✓Built-in tracing
* ✓Python & JS/TS
* ✓Minimal boilerplate

### Choose Mastra if…

* ✓You want a free tier to validate before paying.
* ✓Best-in-class for TypeScript teams
* ✓Batteries-included (agents, workflows, memory, evals)
* ✓From the experienced Gatsby team
[Mastra review & pricing ](https://appstackbuilder.com/tools/mastra)

### Choose OpenAI Agents SDK if…

* ✓You want a free tier to validate before paying.
* ✓Very low boilerplate, fast to ship
* ✓Production-ready with tracing
* ✓Backed by OpenAI
[OpenAI Agents SDK review & pricing ](https://appstackbuilder.com/tools/openai-agents-sdk)

## Frequently Asked Questions

Is Mastra better than OpenAI Agents SDK?⌄

Both Mastra and OpenAI Agents SDK are strong agent framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

What is the difference between Mastra and OpenAI Agents SDK?⌄

Mastra — Open-source TypeScript agent framework from the Gatsby team — agents, workflows, memory, and observability in one modern stack. OpenAI Agents SDK — OpenAI's lightweight, production-ready agent SDK — minimal-boilerplate agents, tools, handoffs, and guardrails. Both are agent framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Mastra vs OpenAI Agents SDK: which is cheaper?⌄

Mastra pricing: Free. OpenAI Agents SDK pricing: Free. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, Mastra or OpenAI Agents SDK?⌄

In our catalog, Mastra rates 4.6 out of 5 and OpenAI Agents SDK rates 4.5 out of 5, so Mastra has a slight edge on reviews.

See more options in our guide to the [best agent framework tools for startups](https://appstackbuilder.com/categories/agent-framework).

## Still not sure which to pick?

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