How is growth hacking different from marketing?

Marketing focuses mainly on acquisition; growth hacking experiments across the whole funnel, including the product itself.

Can small companies do it?

Yes. It started at startups that needed to grow fast on tiny budgets.

Growth hacking

💼 Business By CampusDown Wiki Editorial Team Last updated October 26, 2026

Growth hacking is a growth strategy that combines product, data, and marketing, running rapid experiments to grow users and revenue on a small budget.

Contents

1. Origins and classic examples
2. AARRR and the experiment loop
3. Limits
4. FAQ
5. References

Origins and classic examples

In 2010 Sean Ellis, who drove early growth at Dropbox and LogMeIn, wrote a blog post titled "Find a Growth Hacker for Your Startup." He described someone whose every decision is aimed at growth. Earlier examples set the pattern. In 1996 Hotmail added a "Get your free email at Hotmail" link to every message and reached 12 million users in about 18 months. Dropbox's referral program gave both inviter and invitee extra storage, taking it from 100,000 to 4 million users in 15 months. Airbnb pulled in early users by letting hosts cross-post listings to Craigslist.

AARRR and the experiment loop

In 2007 investor Dave McClure split growth into Acquisition, Activation, Retention, Referral, and Revenue. Read aloud, AARRR sounds like a pirate, hence "pirate metrics." Growth teams choose a company-wide north star metric, rank ideas by ICE score (impact, confidence, ease), and validate them quickly with A/B tests every week. The point isn't to spend more on ads but to find and fix the weakest link in the funnel.

Limits

Growth hacking only works when people truly want the product, which is to say when there's product-market fit. Without it, new users churn and acquisition costs balloon. Dark patterns lift short-term numbers but erode trust and invite regulation. Examples include harvesting contacts for spammy invites and making cancellation hard. LinkedIn paid $13 million in 2015 to settle a lawsuit over unauthorized invitation emails.

FAQ

How is growth hacking different from marketing?: Marketing focuses mainly on acquisition; growth hacking experiments across the whole funnel, including the product itself.
Can small companies do it?: Yes. It started at startups that needed to grow fast on tiny budgets.

Sources reviewed: 2026-10-26

References

Ellis, S. (2010). Find a Growth Hacker for Your Startup. Startup Marketing blog.
Ellis, S., & Brown, M. (2017). Hacking Growth. Crown Business.
McClure, D. (2007). Startup Metrics for Pirates: AARRR! 500 Startups.

Reports and materials that use this theory (Korean)

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Product-market fitProduct-market fit, from Andy Rachleff's idea and Marc Andreessen's 2007 'The only thing that matters' to Sean Ellis's 40% 'very disappointed' test, flattening retention curves, Superhuman's PMF engine, pivots like Slack and Instagram, and the danger of scaling too early.💼 Business A/B testingA/B testing randomly splits users between two versions to see which performs better. How to set hypotheses and metrics, sample size and p-values, common mistakes like peeking and multiple comparisons, and examples from Google and Amazon.💼 Business Customer acquisition cost (CAC)Customer acquisition cost (CAC): why it became a core startup and SaaS metric after David Skok's 2010 SaaS metrics guide, the formula, blended vs paid CAC, the 3:1 LTV:CAC benchmark, 12-month payback, and ways to lower CAC.💼 Business Marketing funnelWhat the marketing funnel is, how it maps the path from awareness to purchase, the AIDA model and TOFU/MOFU/BOFU stages, calculating stage-by-stage conversion rates, AARRR pirate metrics, and McKinsey's critique.💼 Business Minimum viable product (MVP)The minimum viable product, from Frank Robinson's 2001 coinage and Eric Ries's The Lean Startup (2011): the build–measure–learn loop, MVP types like Dropbox's demo video, Zappos's shoe photos, and Buffer's landing page, and common misconceptions.💼 Business Lean startupWhat the lean startup method is, its roots in Eric Ries (2011) and Steve Blank’s customer development, the minimum viable product and build-measure-learn loop, validated learning and pivots, and its strengths and limits.💼 Business

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This article was last updated on October 26, 2026. It is based on widely recognized original works and textbooks; when citing it in a paper, please check the original sources listed in the references.