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Referral & Word-of-Mouth Programs

Give happy users a reason and an easy way to bring the next ones. Referral programs don't create word of mouth — they amplify the word of mouth you've earned.

Cost
$
Time to results
Months
Difficulty
Medium
Best for
B2C
0/7

Proof first

5 companies already did this.

Every program here rewarded people with more of the product, status, or fun — rarely with plain cash.

Deep dives

Two case studies, start to finish.

Dropbox — give space to get space

Dropbox · 2008

Two-sided reward · +60% signups

What they built: the invite page: extra free storage for both people

What they didDropbox gave both the person inviting and the new user extra free storage for each successful referral, and made inviting friends part of the product.

Why it workedThe reward was more of the product itself, so it attracted people who actually wanted Dropbox. Drew Houston's slides say the program permanently increased signups by 60%. In April 2010 users sent 2.8 million direct invites in 30 days, and by January 2010 referrals drove 35% of daily signups.

Copy thisReward both sides with more of your product — not cash, not swag.

Airbnb — make referrals easy to find

Airbnb · 2014

Referrals rebuilt · 300%+ per day

What they built: a referral flow on web and mobile, with $25 credit each way

What they didAirbnb's original referral program was barely findable on the website and missing from its apps. The team rebuilt it: $25 of travel credit for both sender and friend, promoted across web and mobile, with careful measurement.

Why it workedThe fix wasn't a bigger reward — it was visibility and measurement. Signups and bookings from referrals rose by more than 300% per day.

Copy thisBefore you raise the reward, make the program impossible to miss and easy to use on every device.

The guide

7 steps, each anchored to a real example.

Tick each step off as you go. Your progress is saved in this browser.

Step 1 · ~1 hour

Check there's word of mouth to amplify

Ask new users "How did you hear about us?". If friends and colleagues are already a top answer, a referral program will multiply it. If not, fix the product first.

Onboarding survey

How Harry's did this step

5

referrals

10

referrals

25

referrals

50

referrals

Illustration

Harry's had friends and family primed before launch — and 77% of its ~100K pre-launch emails came through referrals.

Source [3] ↓

Step 2 · ~2 hours

Choose a reward that's more of your product

Extra storage, credit, months free, a premium feature. Product rewards attract people who want the product; cash attracts people who want cash.

Your pricing page

How Dropbox did this step

5

referrals

10

referrals

25

referrals

50

referrals

Illustration

Dropbox paid referrals in free storage — the thing every user already wanted more of.

Source [1] ↓

Step 3 · ~1 day

Make it two-sided

Reward the friend as well as the referrer. People are far happier to share a gift than to ask a favour.

Referral softwarePromo codes

How Airbnb did this step

Illustration

Airbnb gave $25 in travel credit to both sender and recipient once the new user completed a first trip.

Source [2] ↓

Step 4 · ~1 day

Put it where people are happiest

Prompt right after a success moment — a finished trip, a synced file, a first payment received — not in a settings page nobody opens.

In-app promptsEmail

How Airbnb did this step

Illustration

Before the rebuild, Airbnb's referral program was hard to find on the web and missing from its apps. Visibility was the first fix.

Source [2] ↓

Step 5 · ~1 day

Make sharing one tap

Personal link, a pre-written message, the phone's share sheet. Every extra step loses people.

Share sheetPersonal links

How Dropbox did this step

Illustration

Dropbox users sent 2.8 million direct referral invites in a single 30-day period in April 2010.

Source [1] ↓

Step 6 · ~Half a day

Use scarcity or milestones to make it a game

If you have a waitlist, let a referral skip the queue. If you don't, add milestone rewards for people who share a lot.

Milestone tiersInvite codes

How Monzo did this step

5

referrals

10

referrals

25

referrals

50

referrals

Illustration

Monzo gave customers "golden tickets" — an easy way to invite friends in during its waiting-list days. Morning Brew rewarded readers at referral milestones with swag.

Source [5] ↓

Step 7 · ~Monthly

Check that referred users are good users

Compare how referred users stay and pay versus everyone else. Cap or change rewards that attract freebie-hunters.

AnalyticsCohort reports

How Airbnb did this step

Illustration

Airbnb's rebuild was driven by measurement — the team tracked one comparable metric across web and mobile.

Source [2] ↓

Before you start

Pros & cons.

Works in your favour

  • Referred users often trust you more from day one
  • You pay only when it works
  • Compounds as your user base grows
  • Rewards can cost little if they're more of your product
  • Turns happy customers into a channel

Go in with eyes open

  • Can't fix a product people don't love
  • Cash rewards attract fraud and low-quality signups
  • Takes real engineering to do well across devices
  • Rewards are hard to remove once people expect them

Make it yours

Three ways to run it.

The Dropbox model

Product reward · +60% signups

Both people get more of the product. Best for freemium software.

The Airbnb model

Two-sided credit · 300%+

Credit for sender and friend after a first purchase. Best for marketplaces and transactions.

The Morning Brew model

Milestone swag

Rewards at 1, 3, 5, 10… referrals. Best for newsletters and communities.

Copy and paste

Templates & resources.

Two-sided invite message

modeled on Dropbox and Airbnb

{Friend}, I use {product} for {job} and thought you'd like it.

Sign up with my link and we both get {reward}: {link}

Milestone tiers

modeled on Morning Brew

1 referral → {small digital perk}
3 referrals → {sticker pack / bonus content}
5 referrals → {premium month}
10 referrals → {merch}
25+ referrals → {something rare: a call with the founder}

Referral health check

review monthly

Referred signups this month: __ (% of total: __)
Referred → active after 30 days: __% (vs. others: __%)
Referred → paying: __% (vs. others: __%)
Reward cost per referred paying user: $__
Suspicious patterns (same IP, disposable emails): __

From the showcase

Be the first founder featured here.

The famous examples above are proof it works. The next founder reading this wants proof it works for someone like them — that could be you.

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Discussion

Tried this? Tell us how it went.

Share a result, ask a question, or say what you'd do differently. The next founder to try this will thank you.

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Receipts

Sources & references.

Last reviewed

  1. 1.
    Dropbox: Startup Lessons Learned (referral results) (opens in a new tab)

    Drew Houston, slides, 2010

  2. 2.
    Hacking word-of-mouth: making referrals work for Airbnb (opens in a new tab)

    Airbnb Engineering, 2014

  3. 3.
    Harry's ~100K emails in one week / 77% via referral (opens in a new tab)

    Harry's team on tim.blog, 2014

  4. 4.
    How email publishers use swag to grow (Morning Brew) (opens in a new tab)

    Digiday, 2019

  5. 5.
    Monzo's waiting list and golden tickets (opens in a new tab)

    Monzo blog, 2018

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Keep going

Related playbooks.

Build an Email List / Waitlist

Free–$ · Weeks · Easy — referral loops start pre-launch

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Beta / Early-Access Program

Free · Weeks · Medium — invites as referrals

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Create a Private Community

Free · Weeks · Medium — where your advocates gather

Read playbook →