LangChain vs Langfuse: who uses which
Customers, public proof and the companies that use both.
On usedby, 47 companies use LangChain and 17 use Langfuse. 2 companies use both, including Cisco and Samsara. LangChain leads among the Fintech & Payments companies on usedby that use either tool.Latest check Nov 12, 2026: 64 of 64 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses LangChain, Langfuse, or both
Every company with a public proof for at least one of the two tools.
45
listed for LangChain only
2
companies use both
1 of them is listed through a job post on one side, the weakest proof.
15
listed for Langfuse only
On usedby, 45 companies are listed for LangChain only, 15 are listed for Langfuse only and 2 use both, 1 of them through a job post on one side, out of the 62 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company | First public proof, LangChain |
|---|---|
 Cisco | On or before Jun 2025 |
 Samsarajob post for LangChain | — |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use LangChain, Langfuse or both: a share of the companies on usedby, not of the market.
Listed for LangChain onlyBothListed for Langfuse only
More common with LangChain
- Fintech & Payments5 of the 9 Fintech & Payments companies on usedby that use either tool use LangChain.
- Artificial Intelligence3 of the 5 Artificial Intelligence companies on usedby that use either tool use LangChain.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: LangChain, 3 of 5; Langfuse, 0 of 5. Missing facts remain unverified, not absent features.
LangChain
LangfuseQuestions about LangChain and Langfuse
Which is used more, LangChain or Langfuse?
LangChain has more customers on usedby: 47 against 17 for Langfuse.
Do companies use both LangChain and Langfuse?
Yes. 2 companies use both on usedby, including Cisco and Samsara.
Who uses LangChain?
47 companies on usedby, each with the public page that shows it. See who uses LangChain.
Who uses Langfuse?
17 companies on usedby, each with the public page that shows it. See who uses Langfuse.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.