Anthropic (Claude)

Anthropic collects identity and account data, all prompts and responses, and coding sessions. Consumer users can opt in to having conversations used for model training with data retained up to 5 years. API and commercial customers are unaffected: their data is never used for training. With training off, 30-day retention for safety then deleted. No advertising business; data never sold. Dedicated Privacy Center at privacy.claude.com.