Company record
LangChain
Updated November 2, 2026 · Presspool
LangChain builds a platform for agent engineering, spanning its open-source agent frameworks and the LangSmith platform for testing and improving agents with production data. langchain.com
Funding
- $125M Series B, announced October 20, 2025. Led by IVP. Sources: fortune.com.
Whether AI names LangChain
- On the AI infrastructure map: named or cited in 10 of 50 answers to Presspool's AI infrastructure questions on November 2, 2026 (ChatGPT 2 of 8, Claude 1 of 8, Perplexity 1 of 8, Gemini 2 of 8, Copilot 1 of 8, Google AI Mode 1 of 6, Google AI Overviews 2 of 4). See the map. Of the 54 companies on the map, LangChain ranked joint 4th by answers naming or citing it in that sample. The other companies AI names most on AI infrastructure questions: Lambda (17 of 50), Crusoe (13 of 50), Together AI (11 of 50), Fireworks AI (10 of 50), Groq (10 of 50) and Modal (10 of 50). Most often named in the same answers: Braintrust (7), Firecrawl (4), Daytona (1), Exa (1), Fiddler AI (1).
- Machine Relations Index: Cited in 39 of 36,189 Index answers, May 10, 2026 to November 6, 2026.
Week by week
Answers that named or cited LangChain in each weekly sample of Presspool's AI infrastructure questions, by the Monday of the sample week. A row is added every week.
| Week of | AI infrastructure |
|---|---|
| September 21, 2026 | 7 of 39 |
| October 5, 2026 | 9 of 48 |
| October 12, 2026 | 7 of 50 |
| October 19, 2026 | 9 of 56 |
| October 26, 2026 | 6 of 53 |
| November 2, 2026 | 10 of 50 |
Sources AI cites when it names LangChain
Presspool asked its 8 AI infrastructure questions on November 2, 2026; 10 of the 50 answers named or cited LangChain, on ChatGPT, Claude, Perplexity, Gemini, Copilot, Google AI Mode and Google AI Overviews. The sites those 10 answers cited most:
- langchain.com: 5 of 10 answers
- braintrust.dev: 3 of 10 answers
- firecrawl.dev: 3 of 10 answers
- github.com: 3 of 10 answers
- brightdata.com: 2 of 10 answers
- comet.com: 2 of 10 answers
- groundcover.com: 2 of 10 answers
- langfuse.com: 2 of 10 answers
- mintlify.com: 2 of 10 answers
- openai.com: 2 of 10 answers
Related records
Also on the AI infrastructure map: Arcade, Baseten, Braintrust, Clockwork.io, Crusoe, Daytona, DeepInfra, Encord, Exa, fal, Fiddler AI, Firecrawl and 41 more on the map.
IVP, which led this round, also led Wabi ($55 million, round type not disclosed, October 29, 2026). It is also named as an investor in Pigment ($250 million Series E, October 21, 2026).