HaystackOpen-source framework and enterprise platform for AI agents and RAG applications.
vs
LangChainThe open agent platform to own your intelligence
Comparison · AI Agents · weekly run Nov 3
Haystack vs LangChain
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 0 for Haystack.
Choose Haystack if…
- You need SOC 2 Type 2 (vendor claim, not an independent report) coverage
Choose LangChain if…
- You want the brand AI engines rank higher (10.4 vs 0)
- You prefer a larger, established vendor (201–500 employees)
- Stateful multi-agent orchestration via state graphs
- Strong open-source adoption with large download numbers
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Haystack | LangChain |
|---|---|---|
| Visibility score | 0% | 10.4% |
| Change vs last week | New | New |
| Rank in AI Agents | #76 | #12 |
| Share of voice | 0% | 2.7% |
| Mentions this run | 0 | 18 |
| 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
Haystack 0pp · LangChain 0pp over 0 weekly runs.
Engine by engine
LangChain leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
HaystackLangChain
Head to head in AI answers
0 engine answers name both brands
0Haystack ranked higher
0LangChain ranked higher
Features, pricing & fit
| Dimension | Haystack | LangChain |
|---|---|---|
| Pricing model | — | Per seat |
| Entry price | — | Free; paid from $39 per seat / mo |
| Free plan | — | Yes |
| Deployment | Managed cloud, self-hosted, and sovereign or air-gapped environments, including STACKIT for sovereign European cloud | Cloud (SaaS), hybrid (SaaS control plane with self-hosted data plane), or self-hosted in the customer's VPC |
| Compliance | SOC 2 Type 2 (vendor claim, not an independent report) | — |
| Support | — | Community forum, Support portal, Email support, Slack |
| Founded | 2018 | 2023 |
| Headquarters | Berlin, Germany | San Francisco, CA, United States |
| Employees | 51–200 | 201–500 |
| Funding | Round led by Balderton Capital, with GV, Harpoon, System.One and Lunar participating · $46M raised | Series B, led by IVP |
| Best for | Teams building AI agents and RAG applications with Python | Teams building agents that need control over models, context, memory and deployment, and the ability to test, govern and improve them in production |
Plans side by side
Haystack
Pricing not available.
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
Pros and cons
Themes from the AI answers that mention each brand
Haystack
Profile in progress.
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
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Haystack vs LangChain”, https://slateindex.ai/compare/haystack-vs-langchain, data of Nov 3, 2026. Licence: CC BY 4.0.