What costs money today?

Only the handbooks and the roadmaps. You buy each once and it is yours to keep, with later updates.

Is there a subscription?

No. Monthly or yearly plans are not offered. If that ever changes, what is free now stays free.

Yes. Every handbook has a free sample. You need a free account to open it.

Refunds and delivery are described on the refund policy page.

Reading the topics and cheatsheets, the DSA Lab and the planner are free today and are not planned to move behind a paywall.

Pricing

Almost everything on the site is free to use. The handbooks and the ready-made roadmaps are the paid products, and you buy each once.

1.0Free

No trial, no card. Reading never needs an account; signing in adds saving your plan, notes and progress across devices.

Every lesson, section by section, to read without an account.

One-page quick references and the Sheet view of each section.

Animated lessons that show an algorithm running on real values.

Ask the assistant for a plan of your own and follow it. Ready-made roadmaps are in the paid list below, each with a free preview.

Dated sessions, revisions and reminders. Works without an account.

2.0Paid

Live prices, the same ones you see at checkout.

A week-by-week plan with projects, the route and skill views, and a place in your Study plan. Each has a free preview.

Long-form books you read in the browser and keep. Buy one volume, a whole handbook or all of them. A free sample is open with a free account.

All handbooks
32 volumes
~~₹1,568~~₹299
System Design Handbook
7 volumes · single volumes from the handbook page
~~₹343~~₹239
AWS Production Handbook
2 volumes · single volumes from the handbook page
~~₹98~~₹69
Python Handbook
4 volumes · single volumes from the handbook page
~~₹196~~₹139
FastAPI Handbook
6 volumes · single volumes from the handbook page
~~₹294~~₹209
AI Full-Stack Handbook
7 volumes · single volumes from the handbook page
~~₹343~~₹239
Django Handbook
6 volumes · single volumes from the handbook page
~~₹294~~₹209

Subscriptions: there are no monthly or yearly plans. Everything above is a one-time payment.

?Questions

What costs money today?: Only the handbooks and the roadmaps. You buy each once and it is yours to keep, with later updates.
Is there a subscription?: No. Monthly or yearly plans are not offered. If that ever changes, what is free now stays free.
Is there a free trial of the handbooks?: Yes. Every handbook has a free sample. You need a free account to open it.
Can I get a refund?: Refunds and delivery are described on the refund policy page.
Will the free parts stay free?: Reading the topics and cheatsheets, the DSA Lab and the planner are free today and are not planned to move behind a paywall.