LangSmithAI Agents
vs
MastraTypeScript AI Framework for Agents and Apps
Comparison · AI Agents · weekly run Nov 3
LangSmith vs Mastra
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
LangSmith is the stronger AI pick in AI Agents: it has a visibility score of 3 versus 1.2 for Mastra.
Choose LangSmith if…
- You want the brand AI engines rank higher (3 vs 1.2)
- You need SOC 2 Type II or HIPAA or GDPR or ISO 27001 (Engine feature) coverage
- strong production observability
- tracing, debugging and response evaluation
Choose Mastra if…
- AI answers describe it more positively (100% vs 17% positive)
- Type-safe, production-grade application code
- Suited to serious production systems
AI visibility side by side
Latest weekly run · Nov 3
| Metric | LangSmith | Mastra |
|---|---|---|
| Visibility score | 3% | 1.2% |
| Change vs last week | New | New |
| Rank in AI Agents | #31 | #56 |
| Share of voice | 0.9% | 0.5% |
| Mentions this run | 6 | 3 |
| Positive in AI answers | 17% | 100% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
LangSmith 0pp · Mastra 0pp over 0 weekly runs.
Engine by engine
LangSmith leads on 1 of 3 engines
ChatGPT
AI Mode
Perplexity
LangSmithMastra
Head to head in AI answers
0 engine answers name both brands
0LangSmith ranked higher
0Mastra ranked higher
Features, pricing & fit
| Dimension | LangSmith | Mastra |
|---|---|---|
| Pricing model | — | Flat tiers |
| Entry price | — | Free; paid from $250 / mo |
| Free plan | — | Yes |
| Deployment | Cloud, Bring Your Own Cloud, and Self-hosted | Self-hosted on any Node.js-compatible environment, or hosted on Mastra Cloud and Mastra Platform. |
| Compliance | SOC 2 Type II, HIPAA, GDPR, ISO 27001 (Engine feature) | — |
| Support | — | Shared Slack support channel (Enterprise), Dedicated support engineer (Enterprise), SLA support 8-5 Monday-Friday, 8am-6pm PST |
| Founded | — | 2024 |
| Headquarters | San Francisco, California | San Francisco |
| Employees | — | 11–50 |
| Funding | Series B | Series A · $35M raised |
| Best for | — | Developers and teams building AI agents in TypeScript and JavaScript |
Plans side by side
LangSmith
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
LangSmith
- strong production observability
- tracing, debugging and response evaluation
Mastra
- Type-safe, production-grade application code
- Suited to serious production systems
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “LangSmith vs Mastra”, https://slateindex.ai/compare/langsmith-vs-mastra, data of Nov 3, 2026. Licence: CC BY 4.0.