Kevin Debien joined Plum in 2018 as its entire marketing team. The company had nine people and the product ran inside Facebook Messenger. Nearly nine years later he is Head of Growth at a fintech serving 2.5 million people.
On Adclear's Between the Guidelines podcast, Kevin talks through how Plum grew, why creative decides most of a paid social campaign's success, what AI changes for fintech marketing teams, and how compliance works when you publish at speed.
From Facebook Messenger to 2.5 million users
Living on Meta in the Messenger days left Plum dependent on one channel. Launching the app in 2019 opened up Google and YouTube, then TikTok during COVID.
Kevin still thinks like the performance marketer he started as: watch the numbers, find the format nobody else is using, and get in before it gets expensive.
TikTok Spark Ads and the £50 creator video
Plum was the first fintech in Europe to run TikTok Spark Ads, putting its call to action under creators' own posts. At the time, new TikTok creators would make a video for £50.
Kevin calls channels like that gold mines, and none of them last. Today every competitor is good at paid social, competitive savings rates are table stakes, and the channels stack up into noise.
Where the next fintech growth channel could come from
His candidates for the next gold mine are Reddit, LLM visibility and organic social. He admits Plum hasn't cracked any of them yet.
When Kevin was the only marketer, attribution was easy: a campaign one day showed up as customers the next. With more channels running, the number that matters at Plum is predicted lifetime value, accurate enough to compare paid social, referrals and creator partnerships on the same terms.
Why 80% of paid social success is creative
Campaign setup in the ad manager matters, but Kevin puts 80% of success down to the content itself, and for him it's closer to all of it.
On Meta, Plum skips TV-style ads and runs product screenshots and posts that feel like a tweet. Podcast cuts go to YouTube Shorts. On TikTok the team chases memes that change every week.
How AI is changing fintech marketing
AI means more of the team can do that creative work. Claude handles briefs and ideation well enough that you don't need to be a copywriter. Ad manager MCPs give feedback on where to raise or cut spend. Plum Analytics, connected to Claude, answers CAC, LTV and demographic questions that used to need a data analyst.
The discipline underneath stays the same: knowing which number matters.
Marketing compliance at Plum
Plum was Adclear's first client and Kevin was one of its earliest power users. He describes the platform as a record of every financial promotion for audits and a first round of AI feedback on creative, which frees up compliance ops.
The less obvious benefit is training. New hires and external partners get feedback against the rules on their own, without a marketer relaying it.
You can read how Plum cut approval times by 88% in our Plum case study.
Plum Plan, AI and the FCA guidance line
The conversation closes on Plum's AI chatbot and Plum Plan, which act on users' money for them as well as suggesting what to do with it. Both are kept carefully on the guidance side of the FCA line.
Kevin also talks about Plum's brand, which is deliberately warm and humble for a mass market that runs from savings-rate hunters to TikTok sign-ups.
His simplest advice for fintech marketers: listen to your prospect.
In this episode
- Kevin's route from sole marketer to Head of Growth at Plum
- Why Plum's move from Messenger to an app opened up new channels
- Running Europe's first fintech TikTok Spark Ads
- Why paid social gold mines never last
- Reddit, LLM visibility and organic social as the next channels
- Why 80% of paid social success comes from creative
- Using Claude, ad manager MCPs and Plum Analytics in a growth team
- Predicting LTV to compare paid, referral and creator channels
- How Plum uses Adclear for financial promotions compliance
- Plum Plan, AI money management and the FCA guidance line
- Building a warm, humble brand for a mass market
Watch the episode
About Kevin Debien
Kevin Debien is Head of Growth at Plum, the money app serving 2.5 million people.
He joined Plum in 2018 as its first marketer, when the company had nine employees and the product ran inside Facebook Messenger.
Once you're booked in, we'll send you a free playbook on Financial promotions compliance for FinTechs.
