Hacker Search vs Undermind

Hacker Search is laser-focused on Hacker News content: it uses semantic search and LLM summaries to answer natural language questions about HN discussions. It covers all comments from the past three years, links back to original threads, and offers concept-based search (no exact keywords). Undermind, by contrast, is a deep literature search tool for academic papers: it reads hundreds of papers, follows citation trails automatically, and asks follow-up questions to refine results. It also supports brainstorming research directions, generating custom tables from papers, and provides inline citations for traceability. While Hacker Search provides quick summaries of community sentiment, Undermind delivers in-depth, citation-traced answers that are 10x more relevant than Google Scholar per their claim. Notably, Undermind includes features like notifications for new publications and collaboration on shared projects, which Hacker Search lacks. On the other hand, Hacker Search offers a browse of sample questions for inspiration and optional sign-up for extended access, while Undermind's free tier is more limited. Hacker Search's latest news highlights a related HN launch (Screenpipe), but this doesn't change its core functionality.

Hacker Search is entirely free to use, with an optional sign-up for extended beta access. There's no mention of paid tiers, making it accessible for anyone. Undermind operates on a freemium model: basic features are free, but full-text analysis requires the Pro plan (pricing not specified in the data). Undermind also notes it's not for users needing extensive API or custom workflows, suggesting a more locked-down ecosystem. For a casual user or developer wanting quick HN insights, Hacker Search's free price is unbeatable. For serious researchers who need deep paper analysis, Undermind's Pro plan is likely worth the cost, though the exact price is undisclosed. In summary, Hacker Search wins on price (free), while Undermind charges for advanced capabilities.