Developer toolsUnclaimed profile

LangChain

Developer tools for building, testing, and observing AI applications.

A public listing does not imply membership or availability for introductions.

Customers

ai teams

Business model

usage-based

Funding

Venture-backed

The business

Problem: ai application development
Founders disclosed in reviewed sources: Not documented in this profile yet
Pricing: Pricing not documented in this profile; check the company website.
Payment providers / launch platforms: Payment provider not disclosed
Launch platform not documented

Revenue and performance figures are not disclosed in the sources reviewed for this profile.

2025-10-20 · public disclosure

Funding round

$125,000,000 · announced amount

Investors not disclosed in this source

Documented actions and reported outcomes. These are starting points for experiments, not proof that a tactic caused growth.

No sourced growth example added yet. Founder contributions can help fill this in.

Profile reviewed 2026-09-25. Disclosures are historical snapshots unless a live connection is explicitly identified.

Developer tools

Open-source tracing, evaluation, and prompt management for language-model applications.

usage-based·Venture-backed

Companies using Langfuse

50,000+

Company homepage snapshot; not all identified as paying

Disclosed investors: Lightspeed Venture Partners, La Famiglia +1

For ai teams · 4 sources