Start with the ones your prospective clients actually use: ChatGPT, Google AI Overviews and AI Mode, Perplexity, Gemini, and Microsoft Copilot. They don’t share one source list, which means a page Perplexity cites may never appear in ChatGPT. Rather than chase a single platform, we build the entity clarity, structured content, and off-site authority that travel across all of them and prioritize our efforts toward the engines with the most pull in your market.