Leah Tharin

Profile

The Woman Who Made 50 Million People Love a PDF Tool

There is a version of Leah Tharin that stayed in the executive suite. Comfortable title. Comfortable chair. Comfortable calendar full of meetings where nobody disagrees. She walked away from that version sometime around November 2023 and never looked back.

What she walked toward was stranger, more honest, and considerably more influential. Leah Tharin is now a solopreneur, advisor, keynote speaker, and the author of Leah's ProducTea - a Substack newsletter that 32,000+ product and growth professionals read because it says things the polished conference circuit will not. She advises European SaaS startups through Notion Capital, serves on the board of GotPhoto, and takes the occasional interim executive role when the challenge is interesting enough. She does not do fractional. It is a principle, not a preference.

The CV behind all of this is the kind that product people whisper about. She scaled Smallpdf from a promising file tool to 50 million monthly active users in three years - while also building the B2B and desktop foundations that would outlast her tenure. Before that, she helped GotPhoto reach 20M+ in annual recurring revenue. Before that, she was Head of Product at DeinDeal and helped push Groupon out of the Swiss market before "product-led growth" was a phrase anyone used at a conference.

Twenty-five years of building things that scale. Four startups and counting. A body of work that earns her a ranking of #5 in Marketing and Sales on LinkedIn in Switzerland and #29 in the entire country. She did not get there by being careful.

The move to solopreneurship was not spontaneous. Leah set milestones - $16,000 in annual Substack revenue and 40,000 LinkedIn followers - and left only when she hit them. That is the operator brain at work: do not bet until the data says bet. She published her reasoning afterward, transparently, in a newsletter post that went quietly viral among people tired of the mythology of the overnight pivot.

The brand name "ProducTea" is a pun. Tea as in spilling the tea. Tea as in afternoon conversations. Tea as in the kind of informal, honest exchange that most LinkedIn posts weaponize but rarely deliver. Leah, unusually, actually delivers it.

Origin

Switzerland, Groupon, and the Education Money Can't Buy

She grew up in rural Switzerland. Not the postcard version - the actual version, sheltered and small and very far from anything that resembled a startup ecosystem. Her first real reckoning with scale came in Vienna, two years that she later described as a "sobering" experience. Moving from the Swiss countryside to a European capital has a way of recalibrating what you think you know.

Her formal education carries the Swiss engineering-school stamp: a Matura in Informatics and Engineering from HMS+, later supplemented by a Certificate of Advanced Studies in Usability and User Experience from FHNW - the University of Applied Sciences and Arts Northwestern Switzerland. In practice, the curriculum that shaped her most was the internship-heavy, learn-by-doing model that Swiss technical education uses to compensate for shortened theory years. It turns out that 25 years of building products is also an education. The kind that does not appear in a frame on a wall.

The DeinDeal chapter is underrated in retrospect. When Groupon decided Switzerland was a market worth owning, Leah was already inside the company that stood in their way. The incumbent beat the giant. This was not luck. Groupon had more money, more brand recognition, and more global infrastructure. DeinDeal had better product decisions. The lesson landed early and did not leave.

The Smallpdf Years: Where 50 Million People Happened

If you have ever converted a PDF to Word at 11pm before a deadline, there is a reasonable chance you did it on Smallpdf. In 2018, when Leah joined as Head of Product, Smallpdf was already useful. The ambition was to make it indispensable.

Over three years, she grew the user base to 50 million monthly active users. Read that number again. Fifty million. Monthly. That is not a statistic you stumble into with a good product roadmap and quarterly OKRs. It requires a particular understanding of how products grow without being pushed - how value creates its own distribution, how freemium done right becomes a flywheel, and how freemium done wrong becomes a nightmare.

She wrote openly about the nightmare version too. The piece "How freemium wrecked revenue for Smallpdf" became one of her most-read analyses - not because it was a success story, but because it was not. The willingness to document the failure with the same rigor she applied to the success is the detail that separates Leah Tharin from the generality of product leadership voices who only publish after the numbers go up.

GotPhoto, Jua, and the Interim Chapter

After Smallpdf came Jua.ai - an ML-native weather prediction startup that was building something genuinely strange and interesting: using machine learning to beat numerical weather prediction models that have been the industry standard for decades. Leah joined as Head of Product. The work was technical, the stakes were high, and the product problem was completely unlike anything she had touched before. She did it anyway.

GotPhoto, the EQT-backed platform for professional photographers, pulled her back twice: once during the scale-up years, and again in 2024 when she returned as Interim Chief Product and Growth Officer. She also joined the board. The double role - operator and governor - is a rarity that reflects a company's trust in someone who has seen the inside of the machine from two angles.

The Content Empire

Three Newsletters, a Podcast, and the Art of Spilling the Tea

Most product people write. Very few build audiences. Leah built three.

Leah's ProducTea is the flagship - long-form analysis of Product-led Growth, Product-led Sales, B2B organizational scaling, and the career dynamics that nobody puts on a conference slide. It lives at leahtharin.com, runs on Substack, and has accumulated over 32,000 subscribers who subscribe because the writing does not read like it was approved by a communications department.

Leah's AI-Tea is the second publication, focused on AI and ML's collision with product management. The timing was not accidental. She saw the wave coming and started writing about it before most product people had formed a coherent opinion on what LLMs meant for their jobs. In May 2023, she co-founded Bedfables - an AI-generated children's story startup using generative AI - partly as a research project, partly as a bet, and entirely as a way to stay honest about what AI could actually do from a builder's perspective, not just an observer's.

The third newsletter, Analog Leah, is personal. The content is harder to summarize because that is the point - it is the part of her thinking that does not fit into a product framework. Those who follow all three describe the effect as reading three different people who happen to share a brain.

The podcast - ProducTea with Leah - is available on Spotify, Apple Podcasts, and Buzzsprout, and by Season 4 had focused entirely on go-to-market through Product-led Sales and the realities of senior leadership that do not make it onto the conference keynote stage. Her interview style is direct. She has a low tolerance for people who make the obvious sound profound.

The YouTube channel, which mirrors conference talks and guest sessions, includes a MTPCon 2025 keynote on Growth and Product Management in 2025 and a SaaSiest keynote titled "The Death of Classical Sales in B2B SaaS" - a talk that makes a specific, arguable claim in the title and then defends it for 40 minutes without hedging.

She teaches PLG cohorts on Maven. She gives expert sessions at Notion Capital for their portfolio companies. She advises Toggl on PLG strategy, and Paddle on product monetization. Her frameworks appear in Amplitude templates, Usersnap documentation, and the reading lists of product leaders at companies she has never worked at.

Philosophy

Product-led or Product-dead: Why She Has One Speed

Leah Tharin is a practitioner of what she calls the "Show. Don't tell" school of product growth. In practical terms this means: if your product needs a salesperson in the room before a user understands its value, something upstream has failed. The product should do the selling. Not by being gimmicky. Not by being clever. By being genuinely useful to the right person at the right moment, and then getting out of the way.

This philosophy has limits that she is honest about. Freemium at Smallpdf taught her what happens when the model is applied carelessly - when "product-led" becomes a justification for avoiding hard conversations about monetization, pricing, and the users who will never pay no matter how good the product is. Her guide, the Product-led Growth Guide 3.0, is not a sales pitch for PLG. It is a framework with preconditions, contraindications, and honest assessments of when the model fails.

The evolution to Product-led Sales (PLS) is where her recent thinking has concentrated. PLG gets products into the hands of users. PLS takes the signal from that usage - the departments that adopted it, the power users who cannot live without it, the workflows that depend on it - and hands it to a sales team that shows up with context instead of cold calls. The death of classical B2B sales she announced at SaaSiest is really the death of selling without product intelligence. The sales motion she describes as the replacement is product intelligence with a human follow-through.

Her advisory clients - from Notion Capital portfolio companies to individual founders who find her through the newsletter - describe a consistent pattern: she asks more questions than she answers, she disagrees clearly when she disagrees, and she does not accept frameworks as substitutes for thinking. Elena Verna, her mentor and a figure she credits publicly and repeatedly, described Leah as someone who "paved the way for women in the product and growth community." Coming from someone of Verna's stature, that is a specific and significant claim.

The transparency is structural, not performed. When she starts a new role, she makes her calendar public to everyone in the organization. Not to show she is busy. Not to signal availability. To demonstrate, without a memo or a town hall, that she is talking to everyone and hiding nothing. It is a trust mechanic disguised as a scheduling practice. The kind of operational detail that does not come from a leadership book. It comes from 25 years of noticing what works.

The Turn

Why She Left and Why That Makes Her More Valuable

There is a question that product leaders avoid because the honest answer is inconvenient: at what point does the executive job stop being about building things and start being about protecting the territory you have accumulated? Leah Tharin answered it in November 2023 by resigning from it.

The solopreneurship was not impulsive. She had been building the substrate for it for years - the newsletter, the LinkedIn presence, the advisory network. When she writes about the transition, the framing is forensic: here are the milestones I set, here are the milestones I hit, here is the decision. It reads less like a leap of faith and more like a product launch where the metrics justified the release.

The $16,000 in Substack ARR is significant not because it is a large number - by executive compensation standards it is barely a rounding error - but because it is hers. It came from readers who pay voluntarily for analysis they cannot get in a company all-hands or a product conference. It is the market telling her that the thinking has value independent of the title.

What she built on the other side is a portfolio career that an executive track rarely permits: Notion Capital advisory for European Series A+ SaaS companies, Toggl PLG advisory, GotPhoto board membership and interim C-suite, Maven cohort teaching, conference keynotes, and the writing. Each role is a different kind of leverage. None of them require her to pretend she agrees with decisions she doesn't.

She explicitly does not do fractional work. This is a boundary that reflects a belief: partial commitment produces partial insight. If she is in a company's problem, she is in it completely. If she is advising from the outside, she is advising from the outside. The middle ground she finds intellectually dishonest.

The public calendar policy she deploys when taking interim roles is the same principle applied operationally. Make the work visible. Make the conversations visible. Remove the mystery that organizations use to protect themselves from accountability. It is uncomfortable for some people. It is exactly the point.