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In the competitive world of fintech, growth is often associated with massive advertising budgets and aggressive paid acquisition. Yet Wise (formerly TransferWise) has defied this convention, scaling to 16 million customers and moving $12 billion monthly primarily through a different engine: word of mouth. Nilan Peiris, the Chief Product Officer at Wise, reveals that a staggering 70% of their new user growth comes from existing customers recommending the product. This isn't accidental; it is the result of a deliberate, engineered system that prioritizes product excellence over traditional marketing.
For product leaders and founders, the Wise playbook offers a counter-intuitive approach to scaling. It suggests that the most effective marketing strategy isn't found in ad spend, but in the rigorous engineering of a product so radical that users feel compelled to share it. Peiris breaks down the specific metrics, cultural pillars, and operational decisions that transformed Wise from a small Estonian startup into a global financial giant.
Key Takeaways
- NPS is a volume predictor, not just a sentiment tracker: Moving users from a score of 8 to 9 doubles the number of people they tell about the product.
- Focus on the "Three Pillars": Wise identified Price, Speed, and Ease of Use as the only drivers of advocacy, ignoring other feature requests to relentlessly optimize these three.
- Conviction over experimentation: You cannot "split test your way to love." For core value drivers, skip the test phase and focus engineering resources on radical improvements.
- The "10x" requirement: To generate word of mouth in a commodity market, you must offer an experience users didn't know was physically possible.
- Close the perception gap: Users often don't realize how much value they are getting. Product marketing must visualize the savings or speed to trigger the sharing impulse.
The Economics of Evangelism
Money transfer is, by definition, a commodity. When a customer sends dollars to pounds, they have less money afterward than when they started. In such an industry, building a brand-led business is notoriously difficult because the underlying utility is uniform across providers. Peiris realized early on that to survive in a low-margin sector, Wise could not afford high distribution costs.
The solution was to treat marketing not as an external function, but as a product outcome. While paid marketing can aid brand recall, it rarely builds trust in financial services. Trust is transferred peer-to-peer. When a friend recommends a service, the barrier to entry drops significantly compared to seeing a Google Ad.
Quantifying Word of Mouth
Many companies treat word of mouth as an elusive "viral coefficient." Wise treats it as a hard metric derived from the Net Promoter Score (NPS). By overlaying referral data with NPS survey results, Peiris discovered a mathematical relationship between customer satisfaction and growth:
- Detractors (0-6): Generate almost zero invites.
- Passives (7-8): Provide a baseline level of referrals.
- Promoters (9-10): The magic happens here. A user rating the service a 9 refers twice as many people as an 8. A user rating it a 10 refers twice as many as a 9.
This insight shifted the company’s focus from broadly "making users happy" to a specific goal: moving users up the NPS ladder. To do this, they mined thousands of NPS comments. The feedback was consistent and eventually formed the company’s three product pillars: Make it faster. Make it cheaper. Make it easier.
The "10x Better" Standard
Incremental improvements do not drive advocacy. If Wise entered the US market with a fee of 5.9% when the bank charged 6%, users might use it, but they wouldn't talk about it. Advocacy requires a shock to the system—an experience so superior it renders the old way of doing things obsolete.
You have to give them an experience they didn't know was previously possible and when you're in that place of doing something that no one has ever done before that's when you get it.
To achieve this, Wise works backward from the theoretical ideal: money movement should be instant and free. This creates a roadmap defined not by competitor benchmarks, but by physics and infrastructure.
Engineering Away the Costs
To drop prices sustainably, Wise analyzes their P&L at a forensic level. Every transaction has three cost components:
- People Costs: Support teams and operations. This is often the "cost of poor quality." If the product is confusing, users call support, raising the cost per transaction.
- Risk Costs: Currency fluctuations and fraud.
- Partner Fees: What banks charge Wise to move the money.
By allocating these costs back to the specific routes or user behaviors that generate them, Wise identifies where to invest engineering resources. If 20% of users generate 80% of support tickets, the product team fixes the root cause of those tickets. As costs drop, Wise systematically lowers fees, which increases volume, which further dilutes costs—a classic flywheel effect.
The Singapore Verification Case Study
The commitment to "10x" experiences often requires doing unscalable work. When Wise launched in Singapore, regulations required face-to-face verification for every customer. Most fintechs would view this as a blocker.
Wise instead opened an office specifically to verify users in person. It was expensive and inconvenient, but it allowed them to build a user base. Simultaneously, they lobbied the regulator, using customer dissatisfaction with the face-to-face requirement as leverage. After a year of "doing the hard thing," they became the first company in Singapore to secure an eKYC (electronic Know Your Customer) license. This allowed users to verify via selfie—a 10x improvement over the status quo that triggered massive word-of-mouth growth.
Conviction Over Experimentation
In modern product management, A/B testing is often the default decision-making tool. Peiris argues that while testing is useful for optimization, it creates mediocrity when applied to vision. You cannot validate a strategic pillar like "lowest price" through a two-week split test. The impact of a price drop on customer retention and advocacy plays out over months or years, not days.
Wise operates on conviction. If the data shows that price, speed, and ease are what customers value, the team does not need to test whether they should improve those metrics. They simply measure how much they have improved them.
You can't split test your way to love.
This philosophy liberates product teams. Instead of wasting time proving that faster transfers are better, they spend their time inventing ways to make transfers faster. This requires a culture where teams are rewarded for moving the needle on the core pillars, even if the immediate revenue impact (e.g., dropping prices reduces short-term revenue) looks negative.
Closing the Perception Gap
Building a remarkable product is only half the battle; the customer must realize how remarkable it is. Peiris identifies "Product Marketing" not as creating landing pages, but as closing the delta between the value a user receives and the value they think they received.
For years, Wise struggled to get users to share the product even though it was significantly cheaper than banks. The breakthrough came from a Product Manager who realized users simply didn't believe the savings. They assumed the numbers were too good to be true.
The team designed a "comparison graph" shown immediately after a transfer. It visually displayed the Wise fee versus the hidden fees in traditional bank exchange rates. By explicitly showing the math—"You saved $40 on this transfer"—they bridged the gap between reality and perception. Implementing this transparency on the success page increased the sharing rate by 300%.
Conclusion
The Wise journey suggests that word of mouth is not a lucky viral strike, but a manageable output of product quality. By rigorously measuring advocacy through NPS, identifying the non-negotiable drivers of value (Price, Speed, Ease), and refusing to compromise on the "10x" vision, companies can build a growth engine that pays for itself.
As Seth Godin famously noted, to be remarkable means to be "worthy of remark." Peiris and Wise have proven that when you solve a boring, commodity problem with an excitement and efficiency previously thought impossible, users will not just use your product—they will build your business for you.
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