Reddit's share of citations in Perplexity's AI search results dropped sharply from 25% in February to just 7% in April, according to new data from marketing firm Tinuiti, which tracked AI citations across ChatGPT, Perplexity, Google AI Mode, Google AI Overviews, Google Gemini, Microsoft Copilot, and Meta AI. Overall social-platform citation share on Perplexity fell from 31% to 13% over the same window, and Tinuiti did not identify the reason. Across all platforms studied, social-platform citations were 33% higher in April than in October 2025, driven heavily by Google's surfaces, where YouTube's share of AI Mode citations more than quadrupled between January and April. On the e-commerce side, Best Buy took 6% of April electronics citations versus Amazon's 4%, and Ulta led beauty citations on ChatGPT with 3.5% to Amazon's 1%.
