Anara (formerly Unriddle) is an AI-powered research assistant designed to help academics, researchers, and students understand, analyze, and synthesize complex scientific documents. With over 3 million users, Anara has become an essential tool in the academic world. The platform lets you import research papers, PDFs, and documents to query them in natural language. The AI analyzes the content and answers your questions by directly citing relevant passages from the document, eliminating the need to manually read hundreds of pages. Anara offers advanced features like automatic summary generation, concept map creation, semantic search across your documents, and a writing assistant that helps you draft while drawing from your sources. The platform also enables discovering related articles and automatically building bibliographies. Backed by Y Combinator, Anara is used by researchers at the world's leading universities. The free plan lets you get started with essential features, while premium plans offer unlimited access and advanced analysis features.

Google Gemini is Google's AI assistant, natively multimodal and deeply integrated into the Google ecosystem (Gmail, Docs, Drive, Search, Android). With models ranging from Flash (fast) to Ultra (powerful), it excels at technical tasks like code and math. Available for free with Advanced option for power users.