Public LinkedIn profile snippets in 2026 describe Baserun as acquired / acquired by LlamaIndex, but I did not find a formal acquisition announcement in the sources reviewed.
SourceObservability and evaluation platform for LLM apps.
Public company, workplace, funding, and market signals
Updated Jul 30, 2026
Baserun is a San Francisco-based B2B developer tool for LLM observability, evaluation, tracing, and prompt iteration, marketed as a collaborative platform for engineers and product experts.
Primary product
LLM observability and evaluation platform for AI/LLM apps (Prompt Playground, tracing, testing, and prompt optimization)
Founded
2023
Headquarters
San Francisco, California, United States
Team size
1-10 employees
Industry
Software Development
Sub-industry
LLM observability and evaluation platform
Offices
0 jobs at Baserun
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Business model
Stage
Pre-Seed
Total raised
$500K
Latest round
Pre-Seed · Sep 2023
Latest amount
$500K
Sep 2023 · Y Combinator
Founders
Co-founder
Investors
Public-facing materials emphasize collaboration between engineers and product experts, rapid iteration, shared prompt/version management, and security-conscious deployment options.
Pricing
Public pricing is not disclosed; the site is demo-led and also promotes free sign-up/get started messaging, with a self-hosted option.
Differentiators
Technology
Competitors
Public LinkedIn profile snippets in 2026 describe Baserun as acquired / acquired by LlamaIndex, but I did not find a formal acquisition announcement in the sources reviewed.
SourceLinkedIn · Mar 2024
Product update announcing Claude-3 availability in the Playground and highlighting collaborative prompt sharing and version history.
Baserun blog · Jan 2024
A prompt-engineering post that also promotes Baserun’s Prompt Playground and Prompt Wizard beta for improving prompt quality.
Baserun blog · Dec 2023
Founder post explaining the product vision: monitor customer experience, analyze sessions/traces, run human and automatic evaluation, and iterate safely with regression-style testing.
Y Combinator · Aug 2023
Launch announcement for Baserun’s YC debut; describes it as a testing platform for LLM apps with prompt playground, end-to-end tests, and production monitoring.