Coderbyte is a technical-assessment and interview platform: you build a coding test, send it to candidates, and get scored, cheating-checked results back. If you already have a pipeline of applicants and need a fast, credible way to screen their coding ability, it's one of the most established tools for the job. Coderbyte was founded in 2012 by Daniel Borowski, who built it out of New York City and still runs it as CEO. It started as a library of coding challenges for developers preparing for interviews, and grew into a full pre-employment assessment platform used on the hiring side. Today Coderbyte says it's trusted by 3,000+ startups, enterprises, and staffing platforms, with names like Microsoft, Intel, and Samsung among its users, and around 1M developers who use it to practice and level up. It carries 300+ reviews on G2 at roughly 4.5 stars, and is SOC 2 Type 2 and GDPR compliant.

You assemble an assessment from Coderbyte's library — a stated 10,000+ questions across 500+ skills, languages, and technologies — or write your own. The platform lets you mix, match, and configure the test, then scores submissions automatically and sorts candidates for you. The product spans the whole screening funnel: resume grading and agentic phone screens up front, take-home coding challenges with an AI-assisted IDE, real-time coding interviews with a shared editor and whiteboard, and specialized formats like spreadsheet and Jupyter Notebook assessments. It also leans hard into integrity: webcam proctoring, plagiarism detection, AI-usage detection, tab-leaving and paste detection, and replay tools that let you watch how an answer was typed. Pricing is public, which is refreshing. The Pro plan runs $199/month (or $1,799/year) and handles up to 10 candidates at once with unlimited candidates and admins overall. Enterprise starts at $12,495/year and opens up 100+ simultaneous candidates and the full feature set.

Depth of question library. 10,000+ questions across 500+ skills is a lot of range. Whether you're screening front-end, data, or backend, you can usually assemble a relevant test without writing it from scratch. Integrity tooling. In an era where a candidate can paste a problem into an LLM in seconds, Coderbyte's stack of proctoring, plagiarism, AI-usage, and paste detection is genuinely useful for keeping a screen honest. Transparent, accessible pricing. A $199/month entry point with public numbers is rare in this category. A small team can start screening without a sales call or an annual commitment. Breadth of format. Resume grading, phone screens, take-homes, live interviews, spreadsheets, notebooks — few tools cover this much of the funnel in one place, which reduces the number of vendors you're stitching together.

Coderbyte measures the candidates you already have. It's an evaluation layer — it scores and ranks the people who show up to take your test. Sourcing those people, and getting strong ones to apply in the first place, is a separate job you still own. It also tells you a lot about coding ability under test conditions, which is exactly what a timed challenge is designed to do. Whether someone works well AI-native — pairing with models, wiring up tools, shipping real features — is a different signal than solving a scoped problem against a clock. Both matter; they're just not the same measurement. And the integrity stack, useful as it is, exists because assessments are adversarial by nature: the candidate wants to pass, you want a true read, and the two pull against each other. That's the model working as intended, not a flaw — just worth knowing it's the shape of what you're buying.

Here's the thing a screen can't fix: the best AI engineers aren't taking your assessment. They're not in an applicant pool at all. The ones you actually want are already working — booked on a contract somewhere else, heads-down on hard problems, not applying to jobs and definitely not sitting down to a timed coding test. Nextdev reaches the top 1% of AI engineers — the ones who aren't looking. We find them where they already are, not where they signed up. Then we prove it. We give each one a real problem to build and watch how they actually work — how they think with the model, wire up the tools, ship the thing. So you know they're AI-native because you've seen it, not because a score said so. And when you want one, we employ them for you. One named engineer, on our payroll. The contract, the compliance, the payroll — none of it ever touches your desk. Coderbyte hands you a ranked list and leaves the sourcing and the employment to you. We do all three. You're not picking from who signed up. You're getting the engineer who never would have.

Coderbyte is a strong, mature screening platform, and if your problem is "I have applicants and need to test their coding fairly," it's an easy one to recommend — deep library, honest pricing, serious integrity tooling. Just be clear on what it does: it grades the people you already found. If your real problem is finding proven, AI-native engineers you don't have to source, vet, or employ yourself, that's a different kind of partner, and a different kind of answer.