If you're looking for a Perlego alternative, Semantic Scholar is another good option. It's an AI-powered research service that indexes more than 219 million scientific papers. The site offers robust search filters, AI-summaries, and tools for citing papers, organizing your research, and setting up email alerts. It's free to use, and can be very useful for anyone who needs to dig deep into academic research.
Another contender is Elicit, an AI research assistant that can be used to search, summarize and extract data from more than 125 million academic papers. It's geared for empirical subjects like biomedicine and machine learning. Elicit offers several tiers of service, including a Basic version with a limited number of credits, a Plus subscription and an Enterprise/Institutions option for larger groups.
If you're looking for something more focused on finding literature, Sourcely could be the best option. The service uses sophisticated natural language processing technology to find relevant documents as fast as possible. Its main features include generating authoritative summaries, exporting references and finding sources with advanced filtering. Sourcely offers several pricing tiers, so students and researchers should be able to afford it.
Last is Otio, an AI-native workspace for research that can automatically summarize documents, use AI to help you edit text and handle more than 20 languages. You can use it to generate ideas, create outlines and compare documents, which could be useful for researchers, students and analysts. Otio offers a free plan with unlimited access to its AI models, so it can be a good alternative.