# Mastra vs VoltAgent

## TL;DR

Mastra and VoltAgent are TypeScript agent frameworks with the same core shape: supervisor agents delegating to subagents, plus typed workflows that can suspend and resume. Mastra adds A2A client and server and ACP for coding agents, with source-available `ee/` directories. VoltAgent is MIT throughout, builds on the Vercel AI SDK and ships AG-UI as its own package.

## Facts side by side

|  | [Mastra](https://multiagentguide.top/tools/mastra.md) | [VoltAgent](https://multiagentguide.top/tools/voltagent.md) |
| --- | --- | --- |
| Type | Framework | Framework |
| Languages / SDKs | TypeScript | TypeScript |
| License | unknown | MIT |
| Pricing model | [Open core](https://mastra.ai/pricing) | [Open core](https://voltagent.dev/pricing/) |
| Orchestration pattern | Supervisor | Supervisor |
| GitHub stars | 28,449 (as of 2026-09-30) | 10,707 (as of 2026-09-30) |
| GitHub forks | 2,890 | 1,148 |
| Last push | 2026-09-30 | 2026-09-28 |
| Latest release | @mastra/core@1.72.0 | @voltagent/core@2.11.0 |
| Repository | [mastra-ai/mastra](https://github.com/mastra-ai/mastra) | [VoltAgent/voltagent](https://github.com/VoltAgent/voltagent) |
| Website | [mastra.ai](https://mastra.ai) | [voltagent.dev](https://voltagent.dev) |
| Documentation | [mastra.ai](https://mastra.ai/docs) | [voltagent.dev](https://voltagent.dev/docs/) |
| Last verified | 2026-09-30 | 2026-09-30 |
| MCP support | [Yes (checked 2026-09-30)](https://mastra.ai/docs/connections/mcp) | [Yes (checked 2026-09-30)](https://voltagent.dev/docs/agents/mcp/) |
| A2A support | [Yes (checked 2026-09-30)](https://mastra.ai/docs/connections/a2a) | [Yes (checked 2026-09-30)](https://voltagent.dev/docs/agents/a2a/a2a-server/) |
| AG-UI support | [Partial (checked 2026-09-30)](https://mastra.ai/integrations/agentic-ui/copilotkit) | [Yes (checked 2026-09-30)](https://voltagent.dev/docs/ui/copilotkit/) |
| Install verified | 2026-09-30 | 2026-09-30 |

## Choose Mastra if

- You need A2A in both directions: Mastra serves agents over A2A and wraps remote A2A agents as subagents; VoltAgent documents the server side only.
- You want to run coding agents such as OpenCode as a tool or subagent through `@mastra/acp`, or register Claude Agent SDK agents in the project.
- You want layered memory (message history, observational memory, working memory, semantic recall) from the framework.

## Choose VoltAgent if

- You need one license for the whole repository: VoltAgent is MIT, while Mastra's `ee/` directories require an agreement and license key for production use.
- You already use the Vercel AI SDK v6; VoltAgent agents run on it.
- You want AG-UI from a first-party package (`@voltagent/ag-ui`); Mastra's AG-UI adapter is maintained in the AG-UI repository.

## Migration notes

The concepts line up closely. Mastra subagents listed in a parent's `agents` property correspond to VoltAgent `subAgents` with the generated `delegate_task` tool; Mastra's `onDelegationStart` / `onDelegationComplete` hooks correspond roughly to VoltAgent's `onHandoffComplete`. Workflows translate step by step: `.then()`, `.parallel()`, `.branch()` and `.foreach()` in Mastra versus `andThen`, `andAll`, `andWhen` and `andForEach` in VoltAgent, and both pause with `suspend()` and a resume schema. Tool approval is `requireApproval` in Mastra and `needsApproval` in VoltAgent. Things to check: both need a configured storage adapter for resumable runs (Mastra fails with "snapshot not found" without one; VoltAgent defaults to in-memory); Mastra's `@mastra/core` requires Node.js 22.13 or newer, VoltAgent's quick start asks for 20.19 or newer; VoltAgent labels its Workflows API as preview; Mastra's older `.network()` API is deprecated in favour of supervisor agents.

## FAQ

### Are Mastra and VoltAgent both open source?

VoltAgent's repository is MIT-licensed. Mastra is Apache-2.0 outside its `ee/` directories, which use a source-available enterprise license; GitHub therefore reports no single license for Mastra.

### Do both support MCP, A2A and AG-UI?

MCP: both, as client and server. A2A: Mastra in both directions, VoltAgent server side only. AG-UI: VoltAgent through its own package (yes); Mastra through an adapter maintained in the AG-UI repository (partial).

### What do the paid offerings cover?

Both are recorded as open-core. Mastra publishes plans on its pricing page and licenses its `ee/` code separately; VoltAgent sells the separate VoltOps Console for tracing, evals and deployment, with a free Developer plan limited to 250 traces a month.

### Which releases more often?

Both are active. Mastra's `@mastra/core` went from 1.64.0 to 1.71.0 during September 2026, so pinning versions matters; VoltAgent's latest core release is 2.11.0.

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Data as of 2026-09-30. Not affiliated with listed projects. HTML version: https://multiagentguide.top/compare/mastra-vs-voltagent