HackerRank
LeetCode
Codility
CodeSignal
iMocha
HackerEarth
Codewars
Coderbyte
Preuve AI
IdeaProof.io
Validator AI
IdeaRoast
Kritique AI
WorthBuild.io
VenturusAI
TestSynthia
Preuve AI (Formerly Test Your Idea) validates startup ideas before you build. Describe your concept in plain language and 10 specialized AI agents scan 50+ live data sources to produce a sourced viability report in under five minutes.
Each report covers competitor landscape, total addressable market sizing, demand and trend signals, pricing benchmarks, key risk assumptions, and a composite viability score from 0 to 100. Every data point links to its source - Google Trends, Reddit, Product Hunt, Trustpilot, app stores, and more. If the data cannot verify a claim, it is not included.
A free scan delivers a quick overview with viability score. The Deep Analysis ($29) unlocks all 13 report sections including go-to-market playbook, community signals, pivot recommendations and 3x iterations. The Investor Package ($499) generates five investor-ready deliverables: pitch deck, investment memo, financial model, DD checklist, and pitch prep guide.
5 stars ratings on Trustpilot.
HackerRank
Preuve AIHackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.
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Based on our record, HackerRank seems to be a lot more popular than Preuve AI. While we know about 67 links to HackerRank, we've tracked only 1 mention of Preuve AI. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other peopleโs solutions. - Source: dev.to / 10 months ago
Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / about 2 years ago
I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice if anyone know any alternative that works like Working: Gives a challange User sumbits code and it test into testcases. Source: over 2 years ago
An effective way to improve your JavaScript skills is working through coding challenges and exercises. Sites like ReviewNPrep, FreeCodeCamp, and HackerRank have tons of challenges that allow you to practice JavaScript concepts by building mini-projects and solving problems. These hands-on challenges force you to apply what you learn. Source: over 2 years ago
I'm 18M Indian. Growing up I've always been a daydreamer, if you may. Since 8th grade - I'm fascinated by programming. And I'm good at it too. But I'm not cocky too. I wouldn't say I'm at an advanced level, but I can most probably solve any problem - in time - with my skills. I also keep my skills brushed by solving problems on Hacker Rank (every day or alternate days) and try my best to contribute on... Source: almost 3 years ago
I built Test Your Idea, an AI tool that scans startup ideas against 40+ live data sources and scores their viability. After 2,500+ scans, I started noticing patterns that challenge a lot of the startup advice you see on Twitter. - Source: dev.to / 4 months ago
LeetCode - Practice and level up your development skills and prepare for technical interviews.
IdeaProof.io - IdeaProof is an AI-powered startup factory that helps founders go from raw idea to launch-ready business in minutes. Validate your idea, analyze market & competitors, generate an investor-ready business plan, build your brand & logo in one place.
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
Validator AI - Get AI business validation for any idea
CodeSignal - CodeSignal is the leading assessment platform for technical hiring.
IdeaRoast - IdeaRoast โ Stop guessing. Get the verdict. Your startup idea has a fatal flaw. Four AI examiners find it โ market gaps, competitor threats, unit economics, timing risks. Live data. $3. No account. 90 seconds.