Startup profile · funding coverage
Arcee AI funding, valuation and investors
U.S. open-weight foundation models (Trinity) plus tools to customize and deploy them.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series B
$150M+ (Fortune; company n/d) · September 2026
Latest known valuation
>$1B (company); $1B pre (Fortune)
Series B · September 2026
Total disclosed equity funding
Not publicly disclosed
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
growth · San Francisco, California, USA
Investors in latest funding
Lead: Vista Equity Partners , Cambium Capital , Emergence Capital
Other: M12
Overview
Arcee AI (San Francisco) builds frontier open-weight foundation models and the product stack to customize, evaluate, deploy, and operate them. Founded in 2023 by Mark McQuade (ex-Hugging Face), the company pivoted from post-training into full pretraining after Meta stopped releasing Llama models in early 2025. Its Trinity family ranges from small dense models to Trinity Large (400B MoE).
On September 16, 2026 it announced a Series B led by Vista Equity Partners, Cambium Capital, and Emergence Capital valuing the company above $1 billion; Arcee did not disclose the amount, while Fortune reported at least $150 million at a $1 billion pre-money valuation.
Why Arcee AI is interesting
On Sep 16, 2026 Arcee announced a Series B valuing it above $1B after claiming its entire 2025 Trinity lineup — including a 400B MoE model — was built for about $20M; Fortune reported the raise was at least $150M at $1B pre-money.
Product & use cases
Trinity open-weight foundation models plus products for customization, evaluation, deployment, and operations; DOE Genesis-Science-1 collaboration.
- Enterprise open-weight model deployment with data control
- Developer workloads on permissively licensed frontier models
- Scientific / national-lab research on self-hosted models
Key facts
- Series B at >$1B valuation (Sep 16, 2026) — company; Fortune ≥$150M / $1B pre
- Vista Equity, Cambium Capital, Emergence Capital co-led
- ~$20M claimed cost for 2025 Trinity lineup including Trinity Large 400B MoE
Funding history (newest first)
Series B
2026-09 $150M+ (Fortune; company n/d) Valuation: >$1B (company); $1B pre (Fortune)- Vista Equity Partners (lead)
- Cambium Capital (lead)
- Emergence Capital (lead)
- M12 (participant)
Source: Read source · arcee.ai
Market / IPO context
Editorial / static context — not a live quote.
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