Mastra
agent-frameworks
The TypeScript framework for building AI agents and workflows.
Pricing
Free plan
Rating
—
Votes
0
Head-to-head comparison
Mastra vs Semantic Kernel
Compare Mastra and Semantic Kernel side by side across pricing, features, ratings, pros, cons, best-fit use cases, and alternatives.
Semantic Kernel
agent-frameworks
Microsoft's enterprise SDK for orchestrating LLMs, plugins, and agents.
Pricing
Free
Rating
—
Votes
0
Feature comparison
Feature
Mastra
Semantic Kernel
Category
agent-frameworks
agent-frameworks
Pricing
Free plan
Free
Free plan
API access
Mobile app
Browser extension
Team collaboration
Custom training
Self-hosted option
Offline mode
Multi-language support
Mastra pros and cons
TypeScript-native, rare among serious agent frameworks
Open source and free to self-host
Ergonomic agents, workflows, memory, and evals in one toolkit
Strong funding and momentum (22k+ GitHub stars)
Young project with a still-maturing ecosystem
APIs may change as it evolves toward stability
Fewer integrations than older Python frameworks
Semantic Kernel pros and cons
First-class C#/.NET support, rare among AI frameworks
Free and open source
Enterprise features: type safety, DI, telemetry
Multi-language (C#, Python, Java)
Strategic focus shifting to Microsoft Agent Framework
Concepts like planners have changed across versions
Python support historically trailed .NET
Which one should you choose?
Best overall signal
Semantic Kernel
Selected using Toolglade popularity signals such as views and votes.
Best value signal
Mastra
Selected using free-plan availability and engagement signals.
Best for
Mastra
- TypeScript agent development
- full-stack JS AI apps
- typed agent workflows
- RAG in Node.js
- TypeScript and full-stack JavaScript teams
Semantic Kernel
- enterprise .NET AI apps
- plugin and tool orchestration
- LLM integration in existing systems
- agent building on Microsoft stacks
- Enterprise .NET development teams
FAQ
Is Mastra better than Semantic Kernel?
It depends on your use case. Compare category fit, pricing, feature availability, and ratings before choosing.
Which tool has a free plan?
Mastra and Semantic Kernel offer a free plan based on current Toolglade data.
Where can I find alternatives?
View Mastra alternatives or view Semantic Kernel alternatives.