InterviewBit leads for comprehensive technical interview practice with its extensive problem library. Pramp excels for live peer-to-peer mock interviews in real time. Codesignal suits candidates seeking AI-driven assessments that mirror actual hiring processes used by major tech firms.
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1InterviewBitOver 4,500 curated interview problems across 14 programming languages.95.0NEWFree (basic), Premium from $39/month 2PrampFacilitates over 10,000 mock interview sessions monthly between real engineers worldwide.92.7NEWFree (basic sessions), Premium from $40/month 3CodeSignalUsed by over 2,000 companies for hiring, including Adobe, Spotify, and Dropbox.90.3NEWFree (practice mode), Assess product custom pricing 4LeetCodeOver 15 million registered users and is the de facto standard for technical interview preparation.88.0NEWFree (basic), Premium from $35/month 5HackerRankOver 18 million developers use HackerRank globally for skills development and interview prep.85.7NEWFree (basic), Premium from $40/month 6EducativeOffers courses like 'Grokking the Coding Interview' with over 500,000 enrolled learners.83.3NEWFrom $45/month (unlimited access) 7AlgoExpertFounded by Clément Mihăilescu; emphasises learning patterns rather than memorising isolated problems.81.0NEWFrom $99/year or $29/month 8DesignGurusCo-founded by Fahim ul Haq and Lea Faerman; offers courses like 'Grokking System Design Interviews'.78.7NEWFrom $59/month or $199/year 9Interviewing.ioAnonymity allows candid interviewer feedback; candidates have reported improved interview confidence.76.3NEWFree (with interviewer review option), Paid reviews from $15 per session 10ExponentTrusted by thousands of engineers for prep; includes guides on negotiation and offer evaluation.74.0NEWFrom $29/month The ranking, in detail
01
Comprehensive technical interview preparation with curated problem sets
InterviewBit offers a structured learning path for coding interviews, with problems ranked by difficulty, company-specific question libraries, and detailed solutions. It covers data structures, algorithms, system design, and more, tailored to FAANG-level interviews.
From Free (basic), Premium from $39/monthBest for Software engineers preparing for FAANG technical interviews
95.0
02
Live peer-to-peer mock interviews with real engineers
Pramp pairs candidates with peers for live mock interviews in coding, system design, and behavioural topics. Both participants gain interviewer and interviewee experience, with optional AI-generated feedback after sessions.
From Free (basic sessions), Premium from $40/monthBest for Candidates who value realistic, live interview practice with human feedback
92.7
03
AI-driven coding assessments and interview platform used by major employers
CodeSignal (formerly Codility) provides coding challenges and proctored assessments widely used by recruiters and hiring teams. Candidates can practise with company-specific interview scenarios and receive AI-generated insights on their performance.
From Free (practice mode), Assess product custom pricingBest for Engineers practising with tools actually used in real hiring pipelines
90.3
04
The largest database of coding interview problems and solutions
LeetCode hosts over 3,000 coding problems with company-specific filters (Google, Amazon, Meta, etc.), discussion forums, editorial solutions, and a vibrant community. Premium subscribers unlock curated study plans and premium editorial explanations.
From Free (basic), Premium from $35/monthBest for All software engineers, especially those preparing for technical coding rounds
88.0
05
Coding challenges, skills assessments, and interview preparation platform
HackerRank offers coding challenges across multiple languages, company-specific interview prep tracks, and skills certifications. It emphasises hands-on coding and is used by both job-seekers and recruiters for assessments.
From Free (basic), Premium from $40/monthBest for Developers practising a broad range of programming languages and roles
85.7
06
Interactive learning paths and courses for technical interviews
Educative provides structured, interactive courses on coding interviews, system design, and behavioural topics. Lessons include code editors, visualisations, and guided problem-solving, making complex topics more approachable.
From From $45/month (unlimited access)Best for Candidates who learn better with guided, structured courses rather than problem banks
83.3
07
Video-based algorithm and system design interview preparation
AlgoExpert features 160+ video solutions for coding problems, system design questions, and a custom coding environment. Each video includes detailed walkthroughs and covers core data structures and algorithmic patterns.
From From $99/year or $29/monthBest for Visual learners who prefer video explanations and want complete coverage of core patterns
81.0
08
Specialised platform for system design and behavioural interview prep
DesignGurus (founded by ex-Google and ex-Amazon engineers) offers in-depth courses on system design patterns, mock interviews with experts, and comprehensive guides for behavioural questions. Highly focused on senior-level interview prep.
From From $59/month or $199/yearBest for Mid-level and senior engineers preparing for system design and architecture interviews
78.7
09
Anonymous mock interviews with real engineers from top tech companies
Interviewing.io connects candidates with anonymous mock interviewers from companies like Google, Apple, Amazon and others. Sessions are recorded, and paid participants can get detailed feedback. The platform also helps practise whiteboarding and system design.
From Free (with interviewer review option), Paid reviews from $15 per sessionBest for Engineers seeking honest feedback from experienced hiring managers at top companies
76.3
10
Comprehensive interview prep for tech and product roles including behavioural coaching
Exponent covers technical coding, system design, product management, and behavioural interviews. The platform features video explanations, interactive coding practice, and AI-powered feedback on recorded mock interviews.
From From $29/monthBest for Candidates transitioning into product, PM, or seeking multi-domain interview preparation
74.0
Frequently asked questions
What is the best free AI interview preparation tool for beginners?
LeetCode's free tier offers 3,000+ problems ideal for beginners, though the basic interface can overwhelm newcomers. Alternatively, Educative's 'Grokking' courses and Pramp's free mock sessions provide more structured, guided experiences. For visual learners, YouTube channels and free resources from the above platforms offer good starting points before committing to paid subscriptions.
Should I focus on LeetCode problems or live mock interviews for coding interview prep?
Both are valuable and complementary. LeetCode and similar platforms build pattern recognition and algorithmic thinking; mock interviews (via Pramp, Interviewing.io, or DesignGurus) simulate real pressure, communication, and time constraints. Most successful candidates combine self-paced problem-solving with 5 to 10 live mocks in the final 2 to 4 weeks before their actual interviews.
Are there AI tools that give real-time feedback during mock interviews?
Exponent and some premium tiers of Pramp offer AI-generated post-interview analysis on communication and problem-solving approach. However, real-time feedback during a live interview typically comes from human interviewers. CodeSignal's assessments include AI analytics on code quality, but not live guidance. For immediate feedback mid-interview, peer platforms like Pramp with experienced interviewers remain the best option.