LangChainThe open agent platform to own your intelligence
vs
Retell AIAI Voice Agents That Automate Phone Calls
Comparison · AI Agents · weekly run Nov 3
LangChain vs Retell AI
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 for Retell AI.
Choose LangChain if…
- You want the brand AI engines rank higher (10.4 vs 2)
- You prefer a larger, established vendor (201–500 employees)
- Per seat pricing suits your budget better than usage-based
- Stateful multi-agent orchestration via state graphs
Choose Retell AI if…
- You need HIPAA or SOC 2 Type II or GDPR or ISO 27001 coverage
- Usage-based pricing suits your budget better than per seat
- Highly rated by developers and SMBs
- One of the highest customer star ratings
AI visibility side by side
Latest weekly run · Nov 3
| Metric | LangChain | Retell AI |
|---|---|---|
| Visibility score | 10.4% | 2% |
| Change vs last week | New | New |
| Rank in AI Agents | #12 | #42 |
| Share of voice | 2.7% | 0.5% |
| Mentions this run | 18 | 3 |
| 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 · Retell AI 0pp over 0 weekly runs.
Engine by engine
LangChain leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
LangChainRetell AI
Head to head in AI answers
0 engine answers name both brands
0LangChain ranked higher
0Retell AI ranked higher
Features, pricing & fit
| Dimension | LangChain | Retell AI |
|---|---|---|
| Pricing model | Per seat | Usage-based |
| Entry price | Free; paid from $39 per seat / mo | Contact sales |
| 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 platform, with enterprise on-premises deployment available |
| Compliance | — | HIPAA, SOC 2 Type II, GDPR, ISO 27001 |
| Support | Community forum, Support portal, Email support, Slack | Community and email support, 24/7 omnichannel support with dedicated portal (Enterprise), Dedicated implementation support (Enterprise), Named account manager (Enterprise) |
| Founded | 2023 | 2023 |
| Headquarters | San Francisco, CA, United States | Redwood City, California |
| Employees | 201–500 | 51–200 |
| Funding | Series B, led by IVP | Seed · $5M 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 | Businesses that run high call volumes in healthcare, insurance, financial services, logistics and similar fields, and teams that want to build and change voice agents themselves. |
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
Retell AI
Pay as you go$0per minute, $0.07-$0.31 for voice agents
EnterpriseCustomcustom pricing
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
Retell AI
- Highly rated by developers and SMBs
- One of the highest customer star ratings
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “LangChain vs Retell AI”, https://slateindex.ai/compare/langchain-vs-retell-ai, data of Nov 3, 2026. Licence: CC BY 4.0.