Lemma Blog · Jul 2026
Recent Lemma blog post on the kinds of silent and semantic failures agent observability needs to detect.
Company research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Lemma is a YC F25 San Francisco startup building production monitoring and continuous learning infrastructure for AI agents, focused on catching silent semantic failures, tracing root causes, and automating prompt/agent improvements.
Primary product
Production monitoring and continuous learning platform for AI agents
Founded
2025
Headquarters
San Francisco, California, United States
Team size
1-10 employees
Industry
Software Development
Sub-industry
AI agent observability and reliability infrastructure
Business model
B2B SaaS
sales-led
Funding
Stage
seed
Total raised
$575K
Latest round
Seed · Sep 2025
Latest amount
$575K
Sep 2025 · Y Combinator
People & investors
Leadership
Co-founder and CEO
Co-founder and CTO
Founding GTM Engineer
Founding Design Engineer
Investors
Work & culture
Small founder-led team with a distributed footprint across the US and Canada, shipping quickly and building in public through blog posts, a weekly newsletter, and frequent launch updates.
Product & market
Pricing
Contact sales / demo-led; no public pricing tiers were found
Differentiators
- —Detects silent semantic failures that conventional observability misses
- —Groups recurring failures into issues and alerts in Slack
- —Uses trace-level root cause analysis across agent executions
- —Can generate fixes / PRs and close the loop from detection to improvement
- —Supports continuous learning from real user feedback and production data
- —Includes MCP-based workflows for coding-agent integration
Technology
TypeScript
Python
OpenTelemetry
OTLP
Model Context Protocol (MCP)
GitHub
Customers
Teams building and running AI agents in production
Pre-seed to Series A startup technical leaders
Heads of AI/Engineering and CTOs
Design partners
Competitors
Braintrust
Langfuse
Arize Phoenix
LangSmith
Scale & contact
Estimated revenue
about $171K annual revenue (public estimate)
Estimated monthly visits
5.8K
Traffic estimate as of Jun 2026
Latest news
Lemma Blog · Apr 2026
Official product introduction and launch post describing Lemma as production monitoring for AI agents.
Lemma Blog · Feb 2026
Explains the agent harness landscape and helps position Lemma within the broader AI agent tooling stack.
Lemma Blog · Nov 2025
Lemma’s own recap of Forbes featuring the company among the top startups from YC Fall 2025.
Forbes · Nov 2025
Forbes coverage that includes Lemma among the YC Fall 2025 startups to watch.
Jobs and careers at Lemma
0 jobs at Lemma
No open positions
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