Connected Papers vs Litmaps: pricing, features and which to choose

Connected Papers is a visual literature discovery service for researchers, students, and applied scientists who begin with a paper they already know. A user enters an origin paper and receives a map of related research, making the product useful for orientation before deeper reading. It publicly launched after beta in June 2020. Its About page links team profiles but does not state current headcount or funding. A 2022 announcement said the service was building more than 50 graphs per minute and had reached more than two million researchers in the prior year, which are historical company claims. The product remains active and focused on discovery rather than drafting. Its main tradeoff is convenience versus coverage, since a visual neighborhood can clarify a field without representing every relevant publication.

The workflow begins with a paper title or identifier, then Connected Papers analyzes a surrounding corpus and presents a force-directed graph of strongly related papers. Node size indicates citation influence, color indicates recency, and line strength indicates similarity. Prior Works highlights common ancestors, while Derivative Works surfaces later studies and reviews. Multi-origin graphs refine discovery around several seed papers, and saved papers plus history support repeated sessions. This workflow helps students understand intellectual structure, trace foundations, locate later extensions, and find review papers that may be missed by a single keyword query. It also shifts effort from query construction to result interpretation. Each promising item still requires independent reading, source checking, and confirmation that the apparent relationship is substantively relevant.

Connected Papers is a strong choice for orientation, citation chaining, and finding intellectual neighborhoods around a known paper. ResearchRabbit is broader for collections, author following, and ongoing monitoring, Litmaps emphasizes tracking and alerts, and Semantic Scholar provides conventional search; OpenAlex and Inciteful are additional alternatives. Connected Papers is not a complete search system because graph similarity is not keyword recall, corpus coverage is bounded, and the service cannot replace full-text access, screening, duplicate handling, or source verification. Pick it when a visual map is the fastest way to understand a field or extend a seed-paper search. For systematic reviews, use it alongside explicit database searches, inclusion criteria, screening records, and reference checking so visual prominence does not determine coverage alone.

Litmaps is a New Zealand research discovery company founded by Litmap Limited. Its service maps connections among more than 270 million papers, using citation and reference relationships to help researchers find relevant work. In May 2025, the company closed a $1 million Series A first close led by Scholarly Angels and used the funding to acquire ResearchRabbit. Company coverage said the combined community exceeded 2 million users and annual recurring revenue had reached $1 million. Litmaps remains the product identity after the acquisition. The service is aimed at students, academics and research teams rather than general document management users. Its strongest distinction is a visual map that shows how papers connect over time.

A typical Litmaps workflow starts with a seed paper, a search or an uploaded set of references. Users can explore related articles, expand a map with similar papers, and organize results with tags. Imports support Zotero, Mendeley and EndNote, while searches can use academic metadata from sources including Google Scholar, OpenAlex and PubMed. Citation, semantic and co-author views present different ways to inspect a topic. Users can share maps and monitor them for newly published relevant papers. Free accounts receive monthly summaries, while Pro accounts can configure monitoring frequency, algorithms and filters. Zotero Sync, advanced filters and unlimited maps are reserved for Pro. An OpenAPI specification also exposes authenticated article and search endpoints.

Litmaps is less suitable for summarizing individual documents, maintaining a personal reference library, or running a self-hosted service. Elicit is stronger for structured, question-led reviews, while Consensus suits answer-oriented searches. Connected Papers is a closer visual alternative for focused relationship graphs, although Litmaps adds monitoring, tagging, imports and team collaboration. ResearchRabbit is no longer an independent alternative because Litmaps acquired it in 2025. Litmaps does not clearly publish a generative AI training policy or claim public SOC 2 or ISO certification. Its free plan permits 20 inputs and 100 articles per map, while Pro is listed at $10 per month. Choose Litmaps if you are a researcher who values visual citation discovery, expanding maps and ongoing alerts more than document summarization.