On this page
What Hello Interview is
What is free
What Premium costs
The mock interviews have ended
Is Premium worth paying for?
Who it suits
Who it does not suit
Hello Interview or a structured course?
Frequently asked questions
Related reading
Hello Interview: What It Covers, What It Costs, and Who It Suits
On This Page
What Hello Interview is
What is free
What Premium costs
The mock interviews have ended
Is Premium worth paying for?
Who it suits
Who it does not suit
Hello Interview or a structured course?
Frequently asked questions
Related reading
Hello Interview is an interview preparation site for software engineers. It is built around written guides, guided practice, and an AI tutor. It covers system design, low level design, coding, behavioral interviews, and machine learning system design.
A useful amount of it is free to read. Premium costs 47 for a month, 79 for a year, or $279 for lifetime access, and none of those plans renew on their own.
One thing changed that older reviews still get wrong. The mock interview and mentorship programs have ended, so the site is now entirely self-serve.
This article covers what you get, what is free, what Premium adds, who it suits, and where a structured course fits better.
What Hello Interview is
The site is a library of written guides plus practice tools around them. It says it is used by more than 100,000 software engineers and managers.
The teaching material is organized by round. System design, coding, low level design, behavioral, machine learning system design, and salary negotiation each have their own track.
Three other things come with the guides. Guided practice walks you through a question step by step, and an interview question library holds what the site says is more than 5,000 questions.
There is also an AI tutor that answers questions as you read.
The best known part is "System Design in a Hurry", a compact written guide to the system design round. It is the piece most people mean when they recommend the site.
What is free
More than you would expect. The core written guides, including System Design in a Hurry, are readable without paying, and there are free videos through the library.
That free tier is genuinely the site's strongest feature. If you want a quick, well-organized explanation of how a design round works, you can get it here at no cost.
Premium is what unlocks the deeper breakdowns, the guided practice, the question library, and the AI tutor.
What Premium costs
Three plans, and the useful detail is that none of them renew automatically.
| Plan | Price | List price | Notes |
|---|---|---|---|
| 1 month | $47 | $59 | Does not auto-renew |
| 1 year | $79 | $99 | Can be upgraded to lifetime later |
| Lifetime | $279 | $349 | Includes all future content |
Every plan carries the same contents: the system design, low level design, concurrency, and behavioral courses, guided practice, the question library, and the AI tutor.
For a single interview loop, the one-month plan is usually the sensible choice. The lifetime plan only pays off if you expect to interview repeatedly over several years.
The mock interviews have ended
This is the part worth knowing, because a lot of the advice written about Hello Interview still recommends it for mock interviews.
The founders posted a notice that the mock interview and mentorship programs were wound down. Refunds for unexpired credits were processed, and that window has since closed. Everything else, including Premium, guided practice, and the free content, continues.
So if you came here looking for paid practice with a human interviewer, that is no longer what this site sells.
The AI tutor and guided practice are the replacements. They are useful for structure and for feedback on your reasoning. They are not a substitute for a person who pushes back on your design.
Is Premium worth paying for?
It depends on how much of the free material you have already used.
Read the free guides first. If they answered your question and you feel ready, you do not need Premium. That is a legitimate outcome, and the site is built to allow it.
Premium earns its price in one situation. You have read the overview, you understand the concepts, and you still cannot produce a full answer on your own. Guided practice and the question library are aimed at exactly that gap.
At $47 for a month, the cost is low enough that one interview loop justifies it. The lifetime plan is a different decision, and it only makes sense if you expect to be interviewing on and off for years.
Who it suits
Engineers who want to read rather than watch. The whole site is written material, well edited and quick to scan.
People who want a free starting point. You can learn the shape of a system design round without paying anything, which is rare.
Anyone preparing for a round the site covers well. System design and low level design are the strongest tracks.
People who prefer to buy once. The plans do not auto-renew, which removes the usual subscription problem.
Who it does not suit
Anyone who wants practice with a human. That product no longer exists here.
Engineers who want depth over breadth. The guides are compact by design. "In a hurry" is the promise, and that is also the limit.
People who need a lot of worked examples. The library is strong on method and lighter on complete designs taken from requirements through to a finished answer.
Hello Interview or a structured course?
They are built for different reading habits, so the choice is less about quality than about what you want from the hours.
Hello Interview is a reference you dip into. It is fastest when you already know roughly what you are doing and want the shape of the round confirmed.
A course is a path you follow in order. Grokking the System Design Interview sells for about 59 once, down from a 148 list price. You keep it for life, and it works through 15 design questions from requirements to a finished design.
If you want to see the whole series before choosing, the Grokking course series page lists every Grokking course with its level and the order to take them in.
That matters if your problem is not knowing the concepts but freezing when asked to produce a whole answer under time pressure.
Many people use both, and the split is natural. Read the free guides for the overview, then work through case studies wherever you cannot yet produce an answer on your own.
If you want the two compared feature by feature, we have a fuller side-by-side in Hello Interview guides vs the Grokking course.
Frequently asked questions
Is Hello Interview free? Partly. The core written guides and some videos are free, including System Design in a Hurry. Premium unlocks the deeper breakdowns, guided practice, the question library, and the AI tutor.
How much does Hello Interview Premium cost? 47 for one month, 79 for a year, or 279 for lifetime access, against list prices of 59, 99, and 349. None of the plans renew automatically.
Does Hello Interview still offer mock interviews? No. The mock interview and mentorship programs were wound down, and refunds for unexpired credits have already been processed. The rest of the site continues as normal.
Is Hello Interview enough on its own? For many people it is enough to understand the round. It is lighter on complete worked designs. If your weakness is producing a full answer under time pressure, add practice from somewhere that supplies it.
Is Hello Interview better than a paid course? It is better at giving you a fast, free overview. A course is better at giving you a repeatable method and a lot of worked questions. They solve different problems.
Does it cover low level design and machine learning? Yes. Both have their own tracks, along with coding, behavioral interviews, and salary negotiation.
Related reading
- Hello Interview guides vs the Grokking course. The direct feature comparison.
- Best system design interview courses. Where Hello Interview sits among the other options.
- Low level design interview guide. The round Hello Interview also covers, explained in full.
- System design interview fundamentals. The building blocks any of these resources assume.
- 10 best free resources to learn system design. Other things worth reading before you pay for anything.
Start with the free guides before you buy anything here. Then try a question you have not seen and write a full design for it.
If you can read the guide and still not produce that answer, you have found the gap worth spending money on. A course built around worked case studies is the thing that closes it.
What our users say
Arijeet
Just completed the “Grokking the system design interview”. It's amazing and super informative. Have come across very few courses that are as good as this!
Simon Barker
This is what I love about http://designgurus.io’s Grokking the coding interview course. They teach patterns rather than solutions.
Eric
I've completed my first pass of "grokking the System Design Interview" and I can say this was an excellent use of money and time. I've grown as a developer and now know the secrets of how to build these really giant internet systems.
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