TL;DR: The closest YC-backed alternatives to <strong>Moss</strong> are other Y Combinator B2B companies, especially from the Fall 2025 batch. Below are 20 ranked competitors with batch, status, and team size.
Y Combinator-backed B2B companies similar to Moss (YC Fall 2025).
Last verified:
Bolna AIYC Fall 2025 · Active · 21 people— Voice AI to enable India's next billion
UplaneYC Fall 2025 · Active · 19 people— Replace marketing agencies with AI
BrickantaYC Fall 2025 · Active · 11 people— Agentic AI for Society Builders
ComplyDoYC Fall 2025 · Active · 10 people— Global Compliance for Enterprises
MOVEdotYC Fall 2025 · Active · 10 people— AI Agents for Hardware Engineering
LeadbayYC Fall 2025 · Active · 8 people— Qualify millions of Data-Signal-Scarce leads that couldn't be found…
HyperspellYC Fall 2025 · Active · 8 people— Your Company Brain
ClicksYC Fall 2025 · Active · 8 people— AI agents for your back-office operations.
ProxYC Fall 2025 · Active · 7 people— AI technical support for complex physical products
TreliumYC Fall 2025 · Active · 6 people— The Agent to Build Your Agents
AtlasGridYC Fall 2025 · Active · 6 people— Accelerate Product Iteration
SF TensorYC Fall 2025 · Active · 6 people— Infrastructure for AI labs to focus on research.
MultifactorYC Fall 2025 · Active · 6 people— Zero-trust authentication, authorization, and auditing for AI agents
AbsurdYC Fall 2025 · Active · 6 people— The Creative OS for AI video
itemYC Fall 2025 · Active · 6 people— The AI-Native CRM that works for you
KarumiYC Fall 2025 · Active · 5 people— The Waymo of Personalized demos
LapisYC Fall 2025 · Active · 5 people— AI that creates and runs ads, end-end
Expected ParrotYC Fall 2025 · Active · 5 people— Simulate your customers with AI agents
Imagine AIYC Fall 2025 · Active · 5 people— We reverse engineer B2B growth, starting with LinkedIn.
CrunchedYC Fall 2025 · Active · 5 people— Excel AI analyst for Power Users