Python framework for role-based multi-agent teams: Crews plus event-driven Flows, from MIT open source to enterprise suite.
crewai.com
Alternatives to
Mastra
Best alternatives to Mastra in 2026
An 'AI agent' is a program that uses AI models to carry out multi-step tasks on its own — answering customers, searching documents, filling forms. Mastra is a toolbox for developers who work in the JavaScript/TypeScript world, giving them the ready-made building blocks to create such agents without reinventing the basics every time. Mastra is an open-source TypeScript framework for building AI agents, workflows and AI-powered applications. Agents are defined with typed instructions, models and tools; workflows are graph-based with explicit control-flow primitives (branching, loops, human-in-the-loop pauses); and a model router abstracts 90+ providers including OpenAI, Anthropic and Gemini behind one interface. The framework ships the production plumbing most agent projects end up rebuilding: a memory system for conversation history and retrieval, RAG integration, built-in observability with traces, metrics and evals, and support for authoring MCP servers. It integrates with React, Next.js and Node.js or deploys as a standalone server, and scaffolds new projects via npm create mastra. The core is Apache 2.0 with no seat or usage limits; some enterprise features use a separate Mastra Enterprise License that is free for development but paid in production, and a hosted cloud offers Starter and Teams tiers. With 26k+ GitHub stars it has become the reference agent framework for the TypeScript ecosystem.
Quick comparison of Mastra alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Python developers | Automation teams | — | |
| 2 | Professionnels | Entreprises | — | |
| 3 | AI engineering teams | Product teams with non-technical prompt editors | — | |
| 4 | AI/ML engineers | Data scientists | Platform teams | — | |
| 5 | ML engineers | Data engineers | Enterprises in finance, retail, government | — | |
| 6 | ML engineers | Data engineers | — | |
| 7 | AI/LLM engineers | Security teams | — | |
| 8 | AI product teams | ML engineers | — |
#1
- ✓ Intuitive role-based Crew model — fastest multi-agent prototyping in Python
- ✓ MIT license, 55k+ stars, very large community
#3
Collaboration platform for AI teams to manage, test and monitor the prompts that power their LLM applications.
promptlayer.com
- ✓ Lets non-engineers safely edit and test prompts
- ✓ Eval harness catches regressions before deployment
#4
Serverless cloud platform that runs Python code, including AI model training and inference, on GPUs with sub-second startup and pay-per-second billing.
modal.com
- ✓ Sub-second cold starts even for large GPU-backed containers
- ✓ Pay-per-second, zero charge for idle compute
#5
Managed feature store and AI lakehouse platform for building production machine-learning systems with millisecond-latency feature serving.
hopsworks.ai
- ✓ Sub-millisecond online feature lookups for real-time inference
- ✓ Combines feature store, lakehouse and MLOps in one platform
#6
Open-source feature store that manages the machine-learning data teams use for both model training and real-time predictions.
feast.dev
- ✓ Completely free and open source, no paid tier
- ✓ Broad support: 10+ offline stores, 15+ online stores
#7
Open-source LLM eval and red teaming: test prompts, compare models, catch jailbreaks and data leaks locally and in CI.
promptfoo.dev
- ✓ De-facto standard for open-source LLM evals — 23k+ stars, huge community
- ✓ Automated red teaming: injections, jailbreaks, PII leaks, policy violations
#8
AI eval and observability platform: tracing, LLM and human scoring, quality gates. Used by Vercel, Notion and Replit.
braintrust.dev
- ✓ Trace-to-dataset loop: production failures become permanent eval cases
- ✓ Quality gates block bad AI releases like CI blocks bad code
FAQ about Mastra alternatives
- What is the best alternative to Mastra in 2026?
- Based on our selection, CrewAI is the best alternative to Mastra in 2026. Python framework for role-based multi-agent teams: Crews plus event-driven Flows, from MIT open source to enterprise suite.. See our full ranking above to compare all options.
- Is Mastra free?
- Mastra is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Mastra are there?
- mySelectas has listed 8 alternatives to Mastra in the AI & Machine Learning category. Our selection is updated regularly to include the best options available.