LangSmithAI Agents
vs
SimThe open-source AI workspace to build, distribute, and govern AI agents
Comparison · AI Agents · weekly run Nov 3
LangSmith vs Sim
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 2.3 for Sim.
Choose LangSmith if…
- You want the brand AI engines rank higher (3 vs 2.3)
- You need HIPAA or ISO 27001 (Engine feature) coverage
- strong production observability
- tracing, debugging and response evaluation
Choose Sim if…
- You need a self-hosted or on-premises option
- You need ISO 27001 coverage
- Technical control and model flexibility
- Self-hosting option
AI visibility side by side
Latest weekly run · Nov 3
| Metric | LangSmith | Sim |
|---|---|---|
| Visibility score | 3% | 2.3% |
| Change vs last week | New | New |
| Rank in AI Agents | #31 | #39 |
| Share of voice | 0.9% | 0.7% |
| Mentions this run | 6 | 5 |
| Positive in AI answers | 17% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
LangSmith 0pp · Sim 0pp over 0 weekly runs.
Engine by engine
LangSmith leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
LangSmithSim
Head to head in AI answers
0 engine answers name both brands
0LangSmith ranked higher
0Sim ranked higher
Features, pricing & fit
| Dimension | LangSmith | Sim |
|---|---|---|
| Pricing model | — | Per seat |
| Entry price | — | Free; paid from $25 per seat / mo |
| Free plan | — | Yes |
| Deployment | Cloud, Bring Your Own Cloud, and Self-hosted | Cloud-hosted, or self-hosted in your own cloud with Docker or Kubernetes |
| Integrations | — | 275+ |
| Compliance | SOC 2 Type II, HIPAA, GDPR, ISO 27001 (Engine feature) | SOC 2 Type II, ISO 27001, GDPR |
| Support | — | Dedicated support on the Enterprise plan |
| Founded | — | 2025 |
| Headquarters | San Francisco, California | San Francisco, CA, United States |
| Employees | — | 11–50 |
| Funding | Series B | Series A · $7M raised |
| Best for | — | Companies that need to build, deploy, and govern AI agents across the organization with central control over access, spend, and data |
Plans side by side
LangSmith
Pricing not available.
Sim
Free$0free forever
Pro$25per user/month, billed monthly
Max$100per user/month, billed monthly
EnterpriseCustomcustom, talk to sales
Pros and cons
Themes from the AI answers that mention each brand
LangSmith
- strong production observability
- tracing, debugging and response evaluation
Sim
- Technical control and model flexibility
- Self-hosting option
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “LangSmith vs Sim”, https://slateindex.ai/compare/langsmith-vs-sim, data of Nov 3, 2026. Licence: CC BY 4.0.