# AlgoInsight > AI-powered interview preparation for software engineers: an AI mentor that knows your progress, a dated prep plan built around your interview date, 30+ structured courses with 690+ narrated video lessons and 2,000+ animations built into the lesson text, 640+ DSA problems organised by pattern, system design (HLD and LLD) practice, behavioral practice, four AI mock-interview portals that score you like a real panel, a resume builder with AI review, a jobs board, and a reading library. AlgoInsight is a web app at https://algoinsight.io. Every public page is served as real HTML (the marketing pages are prerendered; every problem, course, free lesson, question, free solution, article, answer and video page is rendered on the server from the database), so crawlers and AI agents can read the content without executing JavaScript. Browsing is free without an account; practising a problem in the editor, starting an AI mock interview, the mentor's memory of your progress and the paid lessons need a free sign-in or Pro. ## The mentor and the plan - [AI Mentor](https://algoinsight.io/mentor): a coach inside the site for guests and members. For members it knows the account - courses in progress, mock interview scores, weak DSA patterns, the active plan - and answers any hour with a concrete next step on the site. It can navigate the site, set up a mock interview, build an interview profile from a job description, and file feedback. Technical questions get a short answer plus a pointer to the lesson, animation or problem, never a full solution. - [Prep Planner](https://algoinsight.io/planner): turns a role, a level, the real weekly hours and an interview date into a day-by-day plan built from the site's own lessons and problems, with a sprint roadmap. Tasks tick themselves off from real activity and the plan re-flows every morning. A guest can run the whole wizard and see a roadmap without an account. ## Core sections - [Courses](https://algoinsight.io/courses): 30+ structured courses (DSA, system design, SQL, concurrency, Node.js, React, JavaScript, Python, Java, cloud, behavioral and more). Each course has modules, topics and subtopics. Most lessons are narrated videos, and the animations from those videos are embedded in the lesson text itself. Free lessons have public pages at /courses/[course]/topics/[topic] and /courses/[course]/topics/[topic]/subtopics/[subtopic]. - [DSA Problems](https://algoinsight.io/dsa/problems): 640+ data-structures-and-algorithms problems organised by pattern, filterable by topic, difficulty, company and tier, with an in-browser editor and AI code review. Every problem statement has a public page at /dsa/[slug]; hints and solutions are in the practice editor. - [DSA Guide](https://algoinsight.io/dsa/guide) and [DSA patterns](https://algoinsight.io/dsa): how to approach DSA interview preparation, pattern by pattern. - [System Design Practice](https://algoinsight.io/system-design/practice): High-Level Design (HLD) and Low-Level Design (LLD) interview questions with an architecture canvas and an AI interviewer. Every question has a public page at /system-design/questions/[slug]; worked solutions at /system-design/solutions/[slug]. - [System Design Guide](https://algoinsight.io/system-design/guide): a framework for system design interviews. - [Behavioral Practice](https://algoinsight.io/behavioral/practice): behavioral interview questions with an AI coach that asks the follow-ups and scores answers against the STAR method. Every question has a public page at /behavioral/questions/[slug]. - [Behavioral Guide](https://algoinsight.io/behavioral/guide): a framework for behavioral interviews. - [AI Mock Interviews](https://algoinsight.io/interview): four portals - [DSA](https://algoinsight.io/interview/dsa), [System Design](https://algoinsight.io/interview/system-design), [Behavioral](https://algoinsight.io/interview/behavioral) and [Technical](https://algoinsight.io/interview/technical) - each a full session with follow-up questions, a scorecard and feedback. A free demo interview needs no account. ## Videos - [Video library](https://algoinsight.io/videos): narrated screen recordings of the real site - a four-minute tour of everything, one complete AI mock interview per portal, and short tours of the courses, DSA practice, system design practice, behavioral practice, the resume portal and pricing. Each video has its own page at /videos/[slug]. - [YouTube](https://www.youtube.com/@AlgoInsight_io): the same videos and the course lessons. ## Career tools and teams - [Resume Builder](https://algoinsight.io/resume-builder): ATS-friendly resume builder with AI-assisted writing, a scored AI review, one-click tailoring to a job description, and application tracking. Free to start. - [Jobs Board](https://algoinsight.io/jobs): tech openings crawled from company career pages, with filters, resume tailoring and application tracking (Pro). - [For Teams](https://algoinsight.io/for-teams): AlgoInsight for organisations - curated learning for engineering teams plus an AI hiring suite (one-attempt candidate interviews, a by-role pipeline, collaborative scorecards, a custom question bank and analytics). Seat-based licensing with an assessment-credit pool. ## Reading - [Articles](https://algoinsight.io/articles): in-depth articles on algorithms, system design and engineering practice. Public pages at /articles/[slug]. - [Answers](https://algoinsight.io/answers): concise programming Q&A. Public pages at /answers/[slug]. - [Engineering Blogs](https://algoinsight.io/resources/eng-blogs): a curated directory of ~450 engineering-blog articles from 57+ companies. - [System Design Solutions](https://algoinsight.io/system-design/solutions): worked solutions and reference architectures. - [Visualizations](https://algoinsight.io/visualizations): interactive, step-through animations of DSA, system design, database and AI/ML concepts. - [How LLMs Work](https://algoinsight.io/how-llms-work): an interactive 3D walkthrough of a real, tiny GPT running in the browser - tokens, embeddings, layer norm, self-attention, the MLP and the output, every number explained and every step in focus - plus GPT-2 and GPT-3 at their real sizes. Every lesson of the AI Engineering course links to the step that shows its idea. ## Pricing - [Pricing](https://algoinsight.io/pricing): most of the platform is free - the visualizer, articles, answers, free courses and lessons, a solid set of DSA problems, the planner, and the mentor for guests. Pro opens the full problem library, all courses, unlimited AI mock interviews, the jobs board and the mentor's weekly plans. Single courses and single sessions can be bought without a subscription. ## Meta - [Sitemap](https://algoinsight.io/sitemap.xml) - a sitemap index with one child per content type, including a video sitemap. - [Releases and roadmap](https://algoinsight.io/releases) - [About](https://algoinsight.io/about)