Anthropic

Anthropic was founded in January 2021 by Dario Amodei, Daniela Amodei, and other former OpenAI researchers who left over strategic disagreements about safety practices. The company structured itself as a public benefit corporation, meaning it is legally obligated to consider public impact alongside profit. Its flagship product line is the Claude series of large language models. As of May 2026, Anthropic had an estimated valuation approaching $1 trillion and roughly 3,000 to 5,000 employees, with a potential IPO discussed for late 2026.

The company's defining research contribution is Constitutional AI (CAI), a training technique that guides Claude's behavior using a written set of principles rather than relying solely on human feedback at every step. Anthropic also runs active research teams in mechanistic interpretability (understanding why models behave the way they do), alignment, and societal impacts. In March 2026, it launched the Anthropic Institute, a think tank studying AI's economic and security effects.

Anthropic deliberately positions itself as the safety-first counterpart to other frontier labs. That identity has created real tension: in early 2026, the U.S. Department of Defense designated Anthropic a 'supply chain risk' after the company refused to remove contractual restrictions on using Claude for autonomous weapons and mass domestic surveillance. A federal judge issued a temporary injunction against the designation in March 2026. For builders, Anthropic matters primarily as the organization that ships Claude and the Model Context Protocol (MCP), both of which have significant footprints in the AI tooling ecosystem.