LangChainThe open agent platform to own your intelligence
vs
SimThe open-source AI workspace to build, distribute, and govern AI agents
Comparison · AI Agents · weekly run Nov 3
LangChain vs Sim
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
LangChain is the stronger AI pick in AI Agents: it has a visibility score of 10.4 versus 2.3 for Sim, and ranks ahead in 100% of the answers that name both.
Choose LangChain if…
- You want the brand AI engines rank higher (10.4 vs 2.3)
- You prefer a larger, established vendor (201–500 employees)
- Stateful multi-agent orchestration via state graphs
- Strong open-source adoption with large download numbers
Choose Sim if…
- You want a lower entry price ($25 vs $39)
- You need SOC 2 Type II or ISO 27001 or GDPR coverage
- Technical control and model flexibility
- Self-hosting option
AI visibility side by side
Latest weekly run · Nov 3
| Metric | LangChain | Sim |
|---|---|---|
| Visibility score | 10.4% | 2.3% |
| Change vs last week | New | New |
| Rank in AI Agents | #12 | #39 |
| Share of voice | 2.7% | 0.7% |
| Mentions this run | 18 | 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
LangChain 0pp · Sim 0pp over 0 weekly runs.
Engine by engine
LangChain leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
LangChainSim
Head to head in AI answers
2 engine answers name both brands
2LangChain ranked higher
0Sim ranked higher
| Prompt | Engine | LangChain | Sim |
|---|---|---|---|
| Compare the leading AI Agents platforms | Perplexity | #7 | #23 |
| Alternatives to the most popular AI agent platform | ChatGPT | #7 | #12 |
Features, pricing & fit
| Dimension | LangChain | Sim |
|---|---|---|
| Pricing model | Per seat | Per seat |
| Entry price | Free; paid from $39 per seat / mo | Free; paid from $25 per seat / mo |
| Free plan | Yes | Yes |
| Deployment | Cloud (SaaS), hybrid (SaaS control plane with self-hosted data plane), or self-hosted in the customer's VPC | Cloud-hosted, or self-hosted in your own cloud with Docker or Kubernetes |
| Integrations | — | 275+ |
| Compliance | — | SOC 2 Type II, ISO 27001, GDPR |
| Support | Community forum, Support portal, Email support, Slack | Dedicated support on the Enterprise plan |
| Founded | 2023 | 2025 |
| Headquarters | San Francisco, CA, United States | San Francisco, CA, United States |
| Employees | 201–500 | 11–50 |
| Funding | Series B, led by IVP | Series A · $7M raised |
| Best for | Teams building agents that need control over models, context, memory and deployment, and the ability to test, govern and improve them in production | 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
LangChain
Developer$0seat per month, then pay as you go
Plus$39seat per month, then pay as you go
EnterpriseCustomcustom pricing, then pay as you go
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
LangChain
- Stateful multi-agent orchestration via state graphs
- Strong open-source adoption with large download numbers
- Suited to enterprise agent loops
- Heavy developer framework that requires coding
Sim
- Technical control and model flexibility
- Self-hosting option
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “LangChain vs Sim”, https://slateindex.ai/compare/langchain-vs-sim, data of Nov 3, 2026. Licence: CC BY 4.0.