Anthropic vs OpenAI
Side-by-side equity comparison for employees weighing offers at Anthropic or OpenAI. Valuations, funding history, headcount growth, and secondary-market context.
| Anthropic | OpenAI | |
|---|---|---|
| Latest valuation | $380B | $852B |
| Latest round | Series E | Series E |
| Round date | January 2025 | October 2024 |
| Total raised | $13.7B | $13.3B |
| Founded | 2021 | 2015 |
| Headquarters | San Francisco, CA | San Francisco, CA |
| Employees | 5,306 | 7,829 |
| Employee YoY growth | +194% | +71% |
| Primary industry | Artificial Intelligence | Artificial Intelligence |
| Secondary-market price | $444.88 | $664.96 |
| Base-case equity multiple | 1x | — |
| Upside equity multiple | 1x | — |
| Lead investors | Google, Spark Capital | Thrive Capital, SoftBank Vision Fund |
| Status | private | private |
Overview
Anthropic is an AI safety company that builds frontier AI systems, including the Claude family of large language models, with a focus on developing reliable, interpretable, and steerable AI.
OpenAI is an AI research and deployment company that develops general-purpose AI systems including GPT large language models and the ChatGPT consumer product.
Why we compare these
Anthropic and OpenAI both appear on AI foundation model labs .
OpenAI appears on Sara's List 2024; Anthropic is a direct competitor we track alongside it.
If you're evaluating offers at either one, the equity math depends on more than the headline valuation — dilution, strike price, time to liquidity, and concentration risk all matter. Use our equity compensation calculator and exit calculator to model your own numbers.