Mastra vs AI SDK
Two sides of the AI SDK & agent framework decision: typeScript framework and thin SDK. When each fits, what it costs, who moves from one to the other, and what makers who chose it say.
Ask your AI about this, with this page as the source:ChatGPT ↗Claude ↗Perplexity ↗
Which fits you
Choose Mastra if- Your app is TypeScript and you want agents without adding a Python service
Use it whenYou want a full agent framework — workflows, memory, evals — in the same TypeScript codebase as your app.
Trade-offYounger ecosystem, and some enterprise features sit under a separate source-available license.
Choose AI SDK if- Your app is TypeScript and you want agents without adding a Python service
Use it whenYou already use the AI SDK for chat and want the agent in the same code.
Trade-offMemory, workflows and evals are left to you or other libraries.
At a glance
| Mastra | AI SDK | |
|---|---|---|
| Used by | 24 makers' products · 13 open-source projects | 4 makers' products · 193 open-source projects |
| Downloads | 1.4M/wk3.6× vs npm | 21.2M/wk+167% vs npm |
| Pricing | Core framework free and open source; enterprise features under a separate source-available license. · paid from $250/mo | Free (open source). |
| Free tier | Yes | Yes |
| Open source | Yes · self-hostable | Yes · self-hostable |
What makers say
Makers on using it for AI SDK & agent framework, from Product Hunt and Starter Story interviews, each linked to the source. Products with a page of their own and fuller notes first.
On MastraReally like the depth of product here, very hard to make a product of this scale high quality, impressed!
Mastra powers our chat infrastructure and makes developing a coding agent seamless
Shoutout to the team at Mastra for building an excellent agent orchestration layer. Mastra is a key part of Imagine.dev’s agentic architecture, helping us coordinate specialized agents and reliably turn high-level intent into structured execution. Their focus on developer experience and composability made it possible…
On AI SDKUsed for multi-agent orchestration, state management, debugging, and structured artifact streaming for our AI application.
AI SDK made super simple to integrate all the different models into our app. Its the best sdk for build ai apps right now.
• TypeScript-first, ergonomic API with excellent Next.js integration; streaming and tool calling are rock solid. • Consistent abstractions across multiple model providers (great with OpenRouter) minimize vendor lock-in and churn. • Clear docs and examples reduce boilerplate and accelerate iteration; fewer edge-case f…
Loved and watch-outs
Themes that recur in makers' words and Hacker News comments, each linked to what it summarises.
MastraMost loved
- TypeScript-first with type safety, so it fits teams whose product stack is already TypeScript. mastra.aiPHmastra.ai 2HN
- Workflows, agents, memory, RAG and evals come in one package, replacing half-built in-house frameworks. mastra.aimastra.ai 2mastra.ai 3HN
- Multi-agent setups such as supervisor agents and runtime routing networks are supported out of the box. mastra.aimastra.ai 2mastra.ai 3HN
Watch-outs
On Product Hunt: 5.0★, 9 reviewsAI SDKMost loved
- One TypeScript API across many model providers, so swapping models needs no code rewrite. PHPH 2HN
- Streaming and tool calling are dependable, with tight Next.js and React integration. PHHNPH 2
- A well-written core that other agent libraries build on, with version-matched docs shipped in the package. HNHN 2HN 3HN 4
Watch-outs
On Product Hunt: 5.0★, 5 reviewsWho uses each
Mastra24 makers' products
Imagine
Revolte
superset
Upsolve AI
MedusaAI SDK4 makers' products
QuartrUsed by both — often one replacing the other, or each for a different part of the product
What makers pair each with
With MastraTransactional Email
Fireworks AI
@O
MongoDB
ReplitFrontend Framework
With AI SDKFrontend Framework
AI SDK + React:
onlookactionbookagentfieldagentsetarchestraAutoGPTcompozycorecustomermatesDatabuddydeepcrawl
documensoand 161 more
onlookactionbookagentfieldagentsetarchestraAutoGPTcompozycorecustomermatesDatabuddydeepcrawldocumensoand 161 more
Arize Phoenix
DocusaurusLLM API
AI SDK + OpenAI API:onlookagentfieldagentsetarchestraAutoGPTcustomermatesdoryelmoever-gauzy
gisellegrida
inbox-zeroand 121 more
onlookagentfieldagentsetarchestraAutoGPTcustomermatesdoryelmoever-gauzygisellegridainbox-zeroand 121 more
LatitudeDatabase
AI SDK + PostgreSQL:onlookagentfieldagentsetarchestraAutoGPTcorecustomermatesDatabuddydocumensodoryelmoever-gauzyand 81 more
onlookagentfieldagentsetarchestraAutoGPTcorecustomermatesDatabuddydocumensodoryelmoever-gauzyand 81 moreNeither quite right?
See the whole AI SDK & agent framework decision →
LangChainBroad frameworkThe largest set of ready-made integrations for models, tools and data sources, in Python and JavaScript.vs Mastra →
LlamaIndexBroad frameworkAgents that mostly retrieve and reason over your own documents.
OpenAI Agents SDKThin SDKA small agent loop with tools, handoffs, guardrails and tracing built in, from the OpenAI team.
Pydantic AIThin SDKPython agents whose outputs must validate against typed schemas, across any model provider.
Claude Agent SDKAgent harnessAgents that read and edit files, run shell commands and manage long context, built on the same harness as Claude Code.
LangGraphMulti-agent orchestrationStateful agents built as an explicit graph of steps, with checkpoints, retries, streaming and pauses for human approval, in Python or JavaScript.