MastraTypeScript AI Framework for Agents and Apps
vs
Semantic KernelOpen-source SDK for adding AI models to C#, Python, and Java applications.
Comparison · AI Agents · weekly run Nov 3
Mastra vs Semantic Kernel
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Mastra is the stronger AI pick in AI Agents: it has a visibility score of 1.2 versus 0 for Semantic Kernel.
Choose Mastra if…
- You want the brand AI engines rank higher (1.2 vs 0)
- Type-safe, production-grade application code
- Suited to serious production systems
Choose Semantic Kernel if…
- You prefer a larger, established vendor (5,000+ employees)
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Mastra | Semantic Kernel |
|---|---|---|
| Visibility score | 1.2% | 0% |
| Change vs last week | New | New |
| Rank in AI Agents | #56 | #80 |
| Share of voice | 0.5% | 0% |
| Mentions this run | 3 | 0 |
| Positive in AI answers | 100% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Mastra 0pp · Semantic Kernel 0pp over 0 weekly runs.
Engine by engine
Mastra leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
MastraSemantic Kernel
Head to head in AI answers
0 engine answers name both brands
0Mastra ranked higher
0Semantic Kernel ranked higher
Features, pricing & fit
| Dimension | Mastra | Semantic Kernel |
|---|---|---|
| Pricing model | Flat tiers | — |
| Entry price | Free; paid from $250 / mo | — |
| Free plan | Yes | — |
| Deployment | Self-hosted on any Node.js-compatible environment, or hosted on Mastra Cloud and Mastra Platform. | Self-managed or Azure |
| Support | Shared Slack support channel (Enterprise), Dedicated support engineer (Enterprise), SLA support 8-5 Monday-Friday, 8am-6pm PST | — |
| Founded | 2024 | 2023 |
| Headquarters | San Francisco | Redmond, Washington |
| Employees | 11–50 | 5,000+ |
| Funding | Series A · $35M raised | — |
| Best for | Developers and teams building AI agents in TypeScript and JavaScript | Developers adding AI models to C#, Python, or Java applications |
Plans side by side
Semantic Kernel
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Mastra
- Type-safe, production-grade application code
- Suited to serious production systems
Semantic Kernel
Profile in progress.
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Mastra vs Semantic Kernel”, https://slateindex.ai/compare/mastra-vs-semantic-kernel, data of Nov 3, 2026. Licence: CC BY 4.0.