AI tools that answer with their sources attached: research engines that cite the passage they used, readers for long documents, and tools that summarise scientific papers.
The tools here are judged by one thing: whether you can trace an answer back to where it came from. Some read your own files and point to the page they relied on; others search the web or social feeds and summarise what they find. The list also contains SEO suites and enterprise machine learning platforms that drifted in from other categories, so look past those to the tools built around citations.
If the source material is a stack of reports or contracts, a document reader is the safer choice because it can only cite what you gave it. Hebbia reads financial reports and legal contracts and returns sourced answers for analysts and lawyers, while Glean is an enterprise research engine for searching across an organisation's own material. Web-facing assistants such as Bing AI or You.com cover far more ground but cite sources you have not vetted.
Open the cited passage and check that it actually says what the answer says, particularly for figures, dates and quotations. For scientific questions, Consensus AI summarises papers into evidence-based answers, but a summary of a study is not the study, so open the paper before you cite it.
Once your sources are gathered, Summary tools can condense them. For the wider family of writing tools, return to Writing & Content Creation.