Atlas / Open-weight and challenger labs / Arcee AI
Arcee AI
AI Market Atlas · by Pro Pluribus
San Francisco
US open-weight challenger: $150M+ Series B at $1B pre-money (Sep); says it trained four open models for $20M.
What it offers
Main offerings
- Trinity Large
- 400B-parameter open-weight model.
- Trinity Nano / Mini
- Small open models for customization and on-prem use.
Recent news
- Arcee raises $150M+ Series B at $1B pre-moneySays it trained four open-weight models for $20M.AI Weekly ↗
- Arcee AI reaches $1B-plus valuation with Series BVista, Cambium and Emergence lead; the money funds next-generation US open-weight models.GlobeNewswire ↗
This map is a by-product of the work. Keeping track of what each of these actually does, and which ones are worth your time, is part of how I advise founder-led companies on AI. If you want that applied to your business, the first conversation is free.
Book a 30-minute conversation →Compiled from public sources by Pro Pluribus; updated 10 Nov 2026. General information, not advice. Company names and logos belong to their owners and are used to identify them, without affiliation or endorsement. Terms