The verdict: Zerodha grew into one of India’s two biggest stockbrokers, around 7.5 million active NSE clients as of May 2024, while its founder says it spent effectively nothing on advertising. No celebrity. No IPL slot. No “download now” carpet bombing. By CEO Nithin Kamath’s own account, the company reached roughly 16 million users without paid advertising. It replaced the ad budget with five things that compound: a cheap product, a trustworthy structure, free education, a referral loop, and patience. That is the whole trick. Most brands cannot copy it, because copying it means giving up the thing they love most. The spending.
Let me show you the wiring. A quick note on dates first: broker rankings move. Zerodha was India’s largest broker by active clients from roughly 2019 until late 2023, when Groww overtook it, as Business Standard reported in October 2023. As of May 2024 it sits second, with about 7.5 million active clients. Treat any “biggest” claim as a snapshot, not a law of physics.
Why does “spend to grow” feel like the only option?
Because spending is easy and patience is hard.
Most startups treat marketing as a tap. Pour money in, get users out. The board likes it because it looks like a machine. Predictable input, predictable output. Burn X crore, buy Y users. It feels like control.
It is not control. It is rent.
The moment you stop paying, the users stop coming. Worse, a chunk of the users you bought never wanted you in the first place. They wanted the cashback. The discount. The joining bonus. You rented attention and called it growth.
Zerodha looked at that machine and refused to plug in. That refusal is the story.
What did Zerodha actually sell instead of ads?
A reason to stay. Not a reason to sign up.
Here is the reframe. A broker does not really sell trades. It sells a place you trust to keep your money and your transactions for years. The switching cost is emotional, not only technical. People do not move brokers on a whim.
So the question is not “how do I get a user cheaply”. The question is “how do I make a user who never leaves and who brings a friend”. Ad spend is terrible at that second job. Ads buy the click. They do not buy the loyalty.
Zerodha spent its energy on the loyalty. Everything below is a substitute for the ad budget. Treat it as a system, because that is what it is.
How does a cheap product become a marketing channel?
When the price itself is the headline.
Zerodha built its name on flat, low-cost brokerage at a time when full-service incumbents charged a percentage on every trade. Legacy brokers commonly charged percentage-based brokerage, in the region of 0.55% on delivery and around 0.275% on intraday. Zerodha introduced a flat Rs 20 per order (or 0.03%, whichever is lower) on intraday and F&O, and made equity delivery free from December 2015, as set out on Zerodha’s own charges page.
That pricing was not a discount. A discount is temporary and you pay for it. This was the permanent shape of the product.
When your price is genuinely lower in a way rivals cannot easily match, the product does your advertising. Customers do the maths and tell their friends. The savings are the pitch. You do not need a tagline when the invoice is the tagline.
This is the first substitute for ad spend. Build a product so obviously good on one axis that talking about it feels natural.
Why does trust beat a celebrity endorsement here?
Because money is the one category where a famous face means little.
Think about what a celebrity actually does in an ad. They lend you borrowed credibility. That works for a cola or a phone. For the place you park your savings, it can backfire. A film star telling you where to invest can read as a warning, not a recommendation. We have crunched the gap between famous faces and actual sales before, in our look at celebrity endorsements and the numbers nobody shares.
Zerodha built trust the slow way. It is bootstrapped and self-funded, with the Kamath family reported to own 100% of the company, and it famously did not chase large external fundraising. It is also profitable: per company financials reported on Wikipedia, FY24 revenue was around Rs 9,372 crore with net income of about Rs 5,496 crore. It even crossed a $1 billion valuation in June 2020 through a self-assigned employee buyback rather than a funding round. In a sector full of hidden charges, being boring and clear was the flex.
Trust is the cheapest marketing there is, and the hardest to fake. You earn it by behaving the same way for years.
What is Varsity, and why is free education such a smart weapon?
Varsity is Zerodha’s free education arm, and it is one of the quietest growth engines in Indian fintech.
Most Indians do not avoid the stock market because they hate it. They avoid it because they are scared and confused. Zerodha understood the real barrier was knowledge, not sign-up friction.
So they taught. Free, plain-language lessons on how markets work. No gate. No “enter your number to continue”. Just the knowledge.
Look at the mechanism. You teach a nervous beginner how investing works. They feel capable. The most natural next step is to open an account with the people who taught them. You did not chase the customer. You built the customer.
This is content marketing done as a public service instead of a lead magnet. It is the opposite of the cargo cult we pulled apart in the “content is king” myth, where brands churn out noise and wonder why nobody converts.
Education also does something ads never can. It pre-qualifies. The person who finishes the lessons is a serious user, not a bonus hunter. Quality in, quality out.
How does a referral system replace an ad budget?
By turning happy users into your unpaid sales team.
Here is the current shape of it, and it matters that you get this right. Per Zerodha’s referral page, a referrer earns 300 reward points for each successfully onboarded client, where the account is activated within 60 days. Those points can be redeemed for ecosystem apps like smallcase, Sensibull and Streak, or used to waive demat account maintenance charges.
Note what is not there: cash. Cash and brokerage-share referral incentives have been discontinued. A SEBI and exchange rule effective 15 August 2024 stopped brokers paying referral commissions to non-Authorised Persons, so the programme is reward points only now. If you read an old blog promising a cash cut, it is out of date.
On the surface it looks like any refer-a-friend scheme. The difference is what it sits on top of.
A referral programme bolted onto a product people dislike just leaks money. People refer for the bounty, the friend signs up, nobody sticks. But a referral programme on top of a product people genuinely trust is rocket fuel. The recommendation is real. The friend joins because of the person, not the coupon.
That is the order that matters. Product first, trust second, referral third. Do it in that order and the referral compounds. Do it backwards and you are just buying users through a different door.
Acquisition cost on a friend’s word of mouth is close to nothing. That is the substitute for the ad budget, and it gets cheaper as you grow, not more expensive.
Why can’t the cash-burning brokers just copy this?
Because the system only works if you are willing to be patient and a little boring.
Every piece fits the others. Cheap product feeds trust. Trust makes education believable. Education creates qualified users. Qualified users refer well. Referrals lower cost, which protects the cheap product. It is a loop, not a list.
You cannot pick one piece and bolt it on. A discount broker with no education converts worse. An education arm on top of a confusing product just educates people about your mess. The loop has to turn together.
And it is slow. There is no quarter where this strategy delivers a hockey stick you can show a board. It delivers a curve that bends up over years. Many venture-backed rivals cannot stomach that. They need the spike. So they spend. Then they need to spend more to stand still. The treadmill never stops.
Zerodha simply chose not to get on the treadmill. That, on this reading, is the masterclass. Discipline is the strategy. The lane is narrow and they stayed in it.
We are not saying ad spend is always wrong. We are saying it is a crutch many brands lean on to avoid building the harder thing. Zerodha, by its own account, built the harder thing.
FAQ
Does Zerodha really spend nothing on marketing?
“Nothing” is the popular myth. The accurate version is that Zerodha says it spent effectively zero on conventional advertising. CEO Nithin Kamath, in a January 2025 LinkedIn post reported by afaqs, said that if the company had advertised, it would have given up a lot of its profits to Google and Meta. These are self-reported founder statements, not an audited line item, and no specific rupee ad-spend figure is publicly sourced. Treat any exact figure you see online as unverified.
What is the single biggest reason Zerodha grew without ads?
The product itself was the pitch. Genuinely low pricing, flat Rs 20 orders and free equity delivery since December 2015, plus visible trust, meant customers had a reason to switch and a reason to talk. Ads sell a click. Zerodha sold a reason to stay.
Is Zerodha still India’s largest broker?
Not as of the latest data here. Zerodha was the largest by active clients until late 2023, when Groww overtook it. As of May 2024 Zerodha is second, with about 7.5 million active NSE clients. This is a moving figure, so check current exchange data before quoting it.
Can a small business copy the Zerodha marketing playbook?
Yes, but only the structure, not the shortcut. Build one part of your product that is clearly better, be transparent, teach your customers something useful for free, then ask happy customers to refer. The mistake is grabbing the referral step without doing the trust work first.
Is “spend to grow” always a bad idea?
No. Paid acquisition has its place, especially for a fast land grab. The point is that paid spend rented on top of a weak product is a leak. Zerodha shows what is possible when you fix the product and the trust first, then let them do the selling.
By Amisha, The Brand Crush. This piece is independent analysis and opinion. The Brand Crush has no commercial relationship with Zerodha. Figures are attributed to the named public sources above and were accurate as of June 2026; financial and ranking data move, so verify before relying on them.
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