System design resources, from a free repo to a ₹49,999 cohort
The free material here is genuinely good — the System Design Primer has 359,000 GitHub stars and costs nothing — so the question is never whether to pay for access. It is whether you need someone to tell you what a good answer sounds like out loud, which is the one thing a repository cannot do and a ₹49,999 cohort can.
How we keep this current. 8 entries. Every link on this page is re-fetched by a checker that follows redirects and fails on a dead one; anything it cannot reach keeps its old date and stays on the review list rather than being quietly restamped. Most recent check: 24 Jul 2026. Oldest entry on the page: 24 Jul 2026. Our editorial standards explain what we refuse to publish.
Short version
Are starting from zero and have time
The System Design Primer, free
It is under a Creative Commons licence, has 359,041 GitHub stars, and ships three Anki decks. Everything paid on this page is a repackaging of the same fundamentals with a better sequence.
Have an interview and want a framework
Hello Interview
The free tier includes named worked problems — Bitly, Dropbox, Uber, WhatsApp, YouTube — and a stated approach for structuring an under-specified question. It also prices in rupees and takes UPI, which nothing else in the interview-prep tier does.
Are a senior engineer who is bored of interview prep
Arpit Bhayani’s masterclass
Twelve live sessions across 28 systems, prototypes written in Go, at 9am IST on weekends. It is ₹49,999 and it is not interview preparation — it is the only thing here aimed at people who want to build the systems rather than describe them.
Want structure without a subscription
AlgoMaster
One-time payments in rupees rather than a recurring charge, at ₹6,750 for a year or ₹13,500 for lifetime, covering system design, low-level design and concurrency in one place.
Every option, with the catch
Ordered by how often we would actually recommend them, not by price or popularity. The “not for” line on each one is the part worth reading twice.
- 1
System Design Primer
github.comAn open-source repository that teaches large-scale system design from first principles, with worked interview problems and their solutions in the same repo.
- Free tier
- All of it, under a Creative Commons Attribution 4.0 licence. There is nothing to buy and no account to make.
- Price
- Free. No paid tier exists.
- Best for
- Building the vocabulary — caching, sharding, consistency, load balancing — before any of the paid material will make sense.
- Not for
- Practice. It is a reference and a set of solved problems, so you can read it cover to cover and still have never had to defend a design out loud, which is what interviews test.
- From India
- Free from anywhere with no payment step, which makes it the only option here with no currency friction at all.
- Worth knowing
- It ships three Anki flashcard decks — one for system design, one for system design exercises, one for object-oriented design — so the spaced repetition is built in rather than left as an exercise.
Checked 24 Jul 2026 - 2
Hello Interview
hellointerview.comA structured system design course built by hiring managers and staff engineers, organised around a repeatable way of attacking an under-specified question.
- Free tier
- The core System Design in a Hurry course, including worked problems for Bitly, Dropbox, Uber, WhatsApp and YouTube. The site states the premium material is in no way required to complete the course.
- Price
- One month ₹3,199, one year ₹5,599, lifetime ₹19,999, each shown against a higher struck-through price. The page states that UPI is accepted.
- Best for
- Someone three weeks out from a system design round who needs a structure to hang answers on rather than more facts.
- Not for
- Depth beyond the interview. The premium problems — Instagram, Yelp, Google Docs, ChatGPT — are locked, and none of it is aimed at people who actually have to operate these systems.
- From India
- The best-priced serious option for Indian buyers on this page: rupee pricing, UPI accepted, and ₹5,599 for a year is a fraction of what the dollar-priced courses come to.
- Worth knowing
- It names its method — the Delivery Framework — and teaches navigating an ambiguous problem systematically instead of memorising architectures. That is the actual difference between a pass and a fail in these rounds.
Checked 24 Jul 2026 - 3
AlgoMaster
algomaster.ioA pattern-led interview-prep site by Ashish Pratap Singh covering algorithms, system design, low-level design and concurrency, with animated explanations.
- Free tier
- A free tier exists alongside the premium section, though the site does not itemise exactly where the line falls.
- Price
- Monthly ₹2,610 as a one-time charge with no auto-renewal, annual ₹6,750 reduced from ₹9,000, lifetime ₹13,500 reduced from ₹22,500.
- Best for
- Covering system design and low-level design together without taking out a subscription, which is the format most Indian buyers actually want.
- Not for
- Anyone who needs to know the content will keep up with them. We could not find any statement of update cadence, and on a one-time payment that matters.
- From India
- Rupee pricing throughout, and the monthly plan explicitly does not auto-renew — a small thing that removes the usual forgotten-subscription risk.
- Worth knowing
- It covers low-level design and concurrency as separate named courses. Indian product-company interviews ask about these far more than American ones do, and most international prep material simply does not have them.
Checked 24 Jul 2026 - 4
DesignGurus
designgurus.ioThe Grokking system design course, maintained by its original authors as a standalone purchase separate from the bundles it used to live inside.
- Free tier
- Introductory lessons, the system design fundamentals, and a preview of the course structure are stated to be free.
- Price
- $148 once for lifetime access to this course. The sitewide plans page separately lists $123 a month, $373 a year, and a $1,024 all-courses lifetime tier, with a region discount applied that we could not get to render an Indian figure.
- Best for
- Anyone who wants the canonical Grokking material from the people who wrote it rather than one of the copies.
- Not for
- Anyone comparing prices. The same course appears at $148 standalone and folded into a $360 roadmap, and the page will not show you your regional price without engaging with it.
- From India
- Geo-pricing exists — the page repeatedly offers a discount for your region — but the actual Indian number never rendered for us, so budget for the dollar figure.
- Worth knowing
- 83 lessons across five chapters, of which a 33-lesson chapter is nothing but worked system design problems, including 16 case studies such as Instagram, Twitter and the Uber backend.
Checked 24 Jul 2026 - 5
ByteByteGo
bytebytego.comAlex Xu’s illustrated system design course and newsletter, built around diagrams rather than prose.
- Free tier
- Free preview chapters before purchase. The newsletter and YouTube channel, both reported at over a million subscribers, are free in full.
- Price
- Not verified. The pricing page shows a launch-sale banner and the plan names but rendered no figures to us across three attempts. Note that the site states refunds are not available.
- Best for
- Visual learners, and for revision — the diagrams are the reason people remember this material rather than re-reading it.
- Not for
- A considered purchase. A no-refunds policy combined with a pricing page that will not show a price to a plain browser request is a poor combination.
- From India
- No INR pricing was visible.
- Worth knowing
- The 30-chapter contents are public even where the prices are not, with named chapters like "Scale From Zero To Millions Of Users", "Design A Rate Limiter" and "Design A Key-value Store" — so you can judge the scope before paying.
Checked 24 Jul 2026 - 6
Educative
educative.ioA text-based interactive learning platform where lessons run in the browser, hosting several of the well-known Grokking system design paths.
- Free tier
- A free account can be created. What it includes was not itemised on any page we could read.
- Price
- Not verified. Neither the homepage nor the system design path rendered a figure for us.
- Best for
- People who cannot stand video courses. Everything runs as text with in-browser exercises, so you move at reading speed rather than playback speed.
- Not for
- Anyone who wants to know what they are committing to. Two attempts produced no price at all, and the free tier’s contents are equally undocumented.
- From India
- No INR pricing was seen in the pages we could read.
- Worth knowing
- The catalogue lists course durations openly — Grokking Modern System Design Interview at 26 hours, the mobile variant at 14, Agentic System Design at 6 — which is a more useful planning number than a lesson count.
Checked 24 Jul 2026 - 7
High Scalability
highscalability.comA long-running blog documenting how real companies scaled their real systems, written up as case studies rather than as interview answers.
- Free tier
- The archive is free to read. A subscription option and a system design course are both referenced without prices.
- Price
- Not verified. No price appears anywhere on the site for either the subscription or the course.
- Best for
- Getting past the memorised answer. Reading how Uber actually scaled, or what running Presto at Meta was really like, gives you the specifics that make an interview answer sound like experience.
- Not for
- Structured preparation. It is a blog with no syllabus, no ordering and no exercises, so it complements a course rather than replacing one.
- From India
- Free to read from anywhere. Nothing India-specific and nothing to buy.
- Worth knowing
- The case studies are named and current — Kafka 101, a history of scaling Uber, the engineering behind AWS S3’s scale — which is material you cannot get from any course because it did not happen in a classroom.
Checked 24 Jul 2026 - 8
Arpit Bhayani’s System Design Masterclass
arpitbhayani.meA live six-week cohort for senior engineers that builds prototypes of real systems rather than discussing their architecture in the abstract.
- Free tier
- The masterclass itself has none. His free material is substantial though — 166+ blog posts and 250+ engineering videos on YouTube.
- Price
- ₹49,999 or $699 for the live cohort, stated as inclusive of taxes and non-refundable. A recordings-only option is ₹49,998.
- Best for
- SDE-2 and above who want to build the systems. Twelve sessions across 28 systems, with prototypes implemented in Go.
- Not for
- Interview preparation, and not for anyone with weekend commitments — sessions run Saturdays and Sundays from 9am to 12pm IST, and the recordings-only option costs one rupee less than the live one, which tells you where the value is meant to sit.
- From India
- The most India-native option here: rupee pricing, IST session times, and an Indian instructor teaching to an Indian cohort. Nothing else on this page is scheduled for your timezone.
- Worth knowing
- The curriculum names the systems rather than the topics — designing load balancers, distributed locks, S3, LSM trees from the ground up, event ingestion at scale — which is a much harder promise to make than "covers distributed systems".
Checked 24 Jul 2026
What we checked
- — Every resource was opened along with its pricing page, on the date shown against the entry.
- — Where a licence mattered we read the licence file itself rather than the README — which is how we caught that the System Design Primer is CC BY 4.0 and not, as a first pass suggested, MIT.
- — Prices are transcribed exactly in the currency shown to a request from India. AlgoMaster’s rupee figures were confirmed a second time by reading the rendered page directly.
- — Several vendors render pricing client-side and show a plain fetch nothing at all. Those are recorded as unverified rather than filled in from a review site.
- — We bought no course and sat in no cohort, so nothing here rates teaching quality. It compares scope, format and price.
What we could not verify
- — ByteByteGo’s price. Its pricing page shows a launch-sale banner and plan names but renders no figures to a fetch, across three attempts.
- — Educative’s price. Neither the homepage nor the system-design path exposed a number.
- — DesignGurus’ India price. Its pricing page repeatedly offers a discount "for Your Region", which confirms geo-pricing exists but never rendered the Indian figure for us.
- — High Scalability sells a system design course, and no price for it appears anywhere on the site.
- — InterviewReady is missing from this list entirely. interviewready.io exceeded 50 redirects on our request and every subdomain we tried either looped or returned an empty page. We have no view on the course; we could not open it.
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Questions people actually ask
Can I learn system design for free?
Yes, and the free material is not a lesser version. The System Design Primer covers the fundamentals under a Creative Commons licence and ships Anki decks, Hello Interview’s core course including five worked problems is free, and High Scalability’s archive of real scaling stories costs nothing. What money buys on this page is sequence, feedback and someone telling you what a good answer sounds like.
Which system design course is best value in India?
Hello Interview at ₹5,599 for a year, because it prices in rupees, accepts UPI, and covers the interview case directly. AlgoMaster at ₹6,750 a year is the better pick if you also want low-level design and concurrency, which Indian product-company interviews ask about more than American ones do. Both are a fraction of the dollar-priced alternatives once conversion is counted.
How long does it take to prepare for a system design interview?
Three to six weeks of consistent evenings is the realistic range if you already build software professionally, and the bottleneck is almost never reading. It is producing a coherent forty-minute answer under questioning, which is why the resources with worked problems and a stated framework outperform the ones with more content.
Is a paid system design cohort worth ₹49,999?
Not for interview preparation — nearly everything an interview tests is available free or for ₹5,599. A cohort like Arpit Bhayani’s is a different purchase: twelve live sessions building prototypes of 28 systems in Go, aimed at senior engineers who want to build these things rather than describe them. Judge it as engineering education, not as interview prep.
What happened to InterviewReady?
We could not reach it. Requests to interviewready.io exceeded fifty redirects, and its www, get and mock subdomains either looped the same way or returned an empty page. That is why it is not on this list. It may well be fine in a normal browser; we do not list things we could not open.
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