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Perplexity
Perplexity launched in 2022, founded by a small team including former OpenAI and Meta researchers, positioning itself specifically as an "answer engine" that directly answers a user's question in natural language while citing its specific sources inline, rather than returning a list of links or an uncited chatbot response. For users comparing it against ChatGPT specifically, Perplexity's citation-forward format directly addresses one of the most persistent criticisms of general-purpose chatbots — the tendency to state incorrect information confidently without any way for a user to verify it — by building source attribution into the core product from the start. Perplexity has positioned itself as a genuine competitive threat to traditional web search in a way most general-purpose chatbots, ChatGPT included, haven't emphasized as directly, expanding into more specialized research and shopping-assistant features built around that same real-time, cited-answer format. As a ChatGPT alternative, Perplexity's combination of a citation-first answer format and its direct positioning as a research and search tool rather than a general conversational assistant has made it the pick most frequently recommended specifically for fact-checking and research use cases.
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DeepSeek
DeepSeek is a Chinese AI company that released a series of open-weight language models beginning in 2023, and its January 2025 release of the DeepSeek-R1 reasoning model triggered a significant, widely covered stock market reaction in US technology shares, driven by claims that the model had been trained at a dramatically lower computing cost than comparable Western models. The company made the unusual decision to release its model weights publicly rather than keeping them fully proprietary, an approach that let independent researchers and developers worldwide download, inspect, and run DeepSeek's models on their own hardware — a meaningfully more open release strategy than the closed, API-only approach most major Western AI labs have taken. DeepSeek's rapid rise intensified an already active global conversation about the balance of AI development between the United States and China, with DeepSeek's claimed training efficiency specifically raising questions about how much of a computing-hardware advantage was actually required to build genuinely competitive frontier AI models. As a ChatGPT alternative, DeepSeek's combination of competitive reasoning performance, an unusually open release model, and its origin as a genuinely disruptive non-US entrant has made it one of the most closely watched and geopolitically significant AI chatbots to emerge since ChatGPT's own 2022 debut.
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