Developer toolsLangChain
Developer tools for building, testing, and observing AI applications.
usage-based·Venture-backed
For ai teams · 4 sources
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Developer tools
Developer toolsUnclaimed profile
Langfuse
Open-source tracing, evaluation, and prompt management for language-model 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 observability
- 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
Publicly disclosed numbers
Revenue: Not disclosed in the reviewed sources.
Companies using Langfuse
50,000+
companies · Company homepage snapshot; not all identified as paying
Observed 2026-09-24 · public disclosure
Investors & funding
Amounts describe the announced round, not each investor’s contribution. Individual check sizes are not disclosed here. Historical rounds are not a current ownership list.
2023-09 · public disclosure
Seed
$4,000,000 · announced amount
Disclosed participants: Lightspeed Venture Partners, La Famiglia, Y Combinator
Langfuse — public disclosure ↗Growth evidence
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.
Sources & freshness
Profile reviewed 2026-09-25. Disclosures are historical snapshots unless a live connection is explicitly identified.
- Langfuse: Open Source Agent Evals & Observability ↗
Checked 2026-09-25
- Get Started with LLM Tracing - Langfuse ↗
Checked 2026-09-25
- Langfuse for chat agents - Langfuse ↗
Checked 2026-09-25
- Langfuse — public disclosure ↗
Checked 2026-09-25
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