Verified claim · AI-ML · 100% confidence
Langfuse founded in: 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform.
Last verified 2026-05-16 · Methodology veritas-v0.1 · e10249c02a470237
Structured fields
- Subject
- Langfuse
- Predicate
founded_in- Object
- 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform
- Confidence
- 100%
- Tags
- langfuse · observability · tracing · open-source · yc-w23 · company-history · founded_in · 2022
Sources (2)
[1] docs · Langfuse · 2023-06-01
About Langfuse“Langfuse was founded by Marc Klingen, Max Deichmann, and Clemens Rawert, all alumni of QuantCo. The platform launched on Hacker News in May 2023 and joined Y Combinator W23.”
[2] github release · Langfuse · 2023-05-18
Langfuse — official GitHub repository
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Langfuse founded in: 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform. — SourceScore Claim e10249c02a470237 (verified 2026-05-16). https://sourcescore.org/api/v1/claims/e10249c02a470237.jsonEmbed this claim
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Frequently asked questions
Is the claim "Langfuse founded in: 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform." verified?
Yes — SourceScore verified this claim with 100% confidence as of 2026-05-16. The verification uses 2 primary sources cross-referenced against the SourceScore methodology (version veritas-v0.1). Full source list + signed JSON envelope linked below.
What is the evidence for "Langfuse founded in: 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform."?
Evidence comes from 2 primary sources: Langfuse, Langfuse. Each source is listed below with verbatim excerpts and URLs. The signed JSON envelope at https://sourcescore.org/api/v1/claims/e10249c02a470237.json includes an HMAC-SHA256 signature for audit verification.
When was this claim last verified by SourceScore?
Last verified 2026-05-16 under methodology version veritas-v0.1. The signed JSON envelope is dated and cryptographically signed for audit trail. Re-verification cadence depends on the claim type and source freshness.
How can I cite this SourceScore claim in my code or article?
Fetch the signed JSON envelope from https://sourcescore.org/api/v1/claims/e10249c02a470237.json which includes the verbatim claim, primary sources, confidence, methodology version, last-verified date, and HMAC-SHA256 signature for audit. The CC-BY-4.0 license permits commercial use with attribution to SourceScore.
Use this claim in your code
Fetch this signed envelope from your application. The response includes the verbatim excerpt, primary source URLs, and an HMAC-SHA256 signature you can verify locally for audit trails.
cURL
curl https://sourcescore.org/api/v1/claims/e10249c02a470237.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/e10249c02a470237.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "Langfuse founded in: 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/e10249c02a470237.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "Langfuse founded in: 2022 by Marc Klingen + Max Deichmann + Clemens Rawert — open-source LLM observability + tracing platform."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_langfuse_fact() -> dict:
"""Fetch the verified SourceScore claim for Langfuse."""
r = httpx.get("https://sourcescore.org/api/v1/claims/e10249c02a470237.json")
return r.json()