LeetCo

LeetCo is a Chrome extension designed to enhance the LeetCode experience by providing company-wise insights directly on problem pages, a feature typically locked behind a LeetCode Premium subscription. This tool is built for serious interview preparation, allowing users to see which companies have asked specific coding problems, complete with clean company badges and logos, all for free. Its core value lies in delivering premium-level data access without any cost, enabling users to prepare smarter and stay focused on targeted company questions. By integrating seamlessly into the LeetCode interface, LeetCo transforms how developers approach technical interview practice by adding crucial contextual data that informs study priorities.

The primary problem LeetCo solves is the paywall barrier that restricts access to company-specific question data on LeetCode, a critical resource for job seekers aiming to tailor their preparation to target companies. Without LeetCode Premium, users lack visibility into which problems are frequently asked by companies like Google, Meta, or Amazon, leading to inefficient study sessions and missed opportunities to practice relevant questions. This matters because technical interviews are highly competitive, and knowing the exact problems a company favors can significantly increase a candidate's chances of success. LeetCo eliminates this financial hurdle, democratizing access to valuable insights and ensuring all users, regardless of budget, can prepare with the same strategic advantage as premium subscribers.

One major feature group is automatic problem detection and company badge display. The extension's content script automatically detects when a user is on a LeetCode problem page and extracts the problem slug. It then queries the LeetCo backend API to retrieve company insights, which are injected as a UI element directly below the problem title. This feature works by displaying clean badges with company logos, indicating which companies have asked that problem, along with time-range based insights showing how recently it was asked. This is useful because it provides immediate, visual context without requiring users to switch tabs or manually search for information, keeping their workflow uninterrupted and focused on solving the problem at hand.

Another key feature is the time-range based insights and company frequency data. LeetCo not only lists companies but also provides insights into the recency and frequency of questions, categorized from recent to all-time. This is achieved through the backend API that processes historical data, allowing the extension to show whether a problem is currently trending in interviews or has a long history of being asked. The terminology includes 'recent' and 'all-time' insights, helping users gauge the ongoing relevance of a problem. This depth of information is crucial for prioritizing study; a problem frequently asked in the last six months is likely more valuable to practice than one last asked years ago, enabling more effective preparation strategies.