How Gamma Built a Micro-Creator Engine by Onboarding Every Creator by Hand

In short

Gamma, an AI tool for building presentations and documents, grew largely through word of mouth, and used micro-creators to amplify it. The detail worth studying is how its co-founder ran the early creator program: he personally onboarded creators one at a time over video, showed them the product, brainstormed angles with them, and almost never handed over a script. The creators told their own stories. Gamma’s co-founder has said word of mouth drives more than half of the company’s subscription growth, and he’s been clear that creators amplify that word of mouth rather than replace it. There’s no flashy ROI number here. The value is the method: treat creators as an extension of the product team, not as a media buy.

What you’ll learn

• Why a founder personally onboarded each early creator

• The difference between micro-creators and a celebrity media buy

• Why creators amplified word of mouth instead of generating demand cold

• The “tell your own story” approach to briefing

• What’s verifiable here, and what isn’t

The method: a founder onboarding creators one by one

The part of the Gamma story that’s worth copying is also the part that sounds least scalable. In the early days, Gamma’s co-founder Grant Lee personally onboarded each micro-creator himself, over video. He’d show them the product, talk through what they could make with it, and brainstorm content angles together. Then he’d get out of the way.

This is the opposite of how most companies run influencer programs, where a brief goes out, a creator works the message in, and the brand never has a real conversation with them. The hand-onboarding looks inefficient, a founder spending hours one-on-one with individual creators, and that’s exactly why most teams skip it. But it’s the source of everything that made the program work. A creator who has been walked through the product by the person who built it, and who has brainstormed their own angle rather than received a script, makes content that sounds like them, because it is them.

The unscalable-looking step was the strategy. It’s the same principle behind giving creators room instead of a script: the value is in what the creator genuinely understands and chooses to say, not in what the brand dictates.

Micro over macro, on purpose

Gamma deliberately favored micro-creators over large accounts. This wasn’t a budget compromise, it was a strategic choice about credibility and fit.

A micro-creator with a smaller, engaged audience that genuinely cares about their niche carries more trust per follower than a celebrity with broad, shallow reach. For a product that spreads by people showing each other something cool they made, that trust is the whole point. The audience has to believe the creator actually uses the tool and isn’t just cashing a check. Spreading the program across many micro-creators also turns it into something Gamma could learn from: many small bets, each one a read on which creators and which angles resonate, rather than one large bet riding on a single name. The approach treats the creator roster the way a product team treats experiments, test broadly, see what works, do more of it.

Creators amplified word of mouth, they didn’t replace it

This is the nuance most write-ups of Gamma get wrong, and it’s the most important thing in the case. It’s tempting to summarize Gamma as “grew through influencers.” Grant Lee has been explicit that it’s more precise than that: the product had to generate word of mouth on its own, and the creators amplified that existing word of mouth rather than manufacturing demand from nothing.

The distinction matters because it sets the order of operations. Gamma’s co-founder has said word of mouth drives more than half of the company’s subscription growth. Creators poured fuel on that fire; they didn’t light it. A company whose product doesn’t already produce some organic word of mouth can’t shortcut to growth by hiring creators, because there’s no fire to amplify. The creators worked for Gamma because the product was already worth talking about, and the program made more people talk about it, faster. Influence as an amplification layer rather than a standalone acquisition channel is the right mental model, and Gamma is one of the clearest examples of it.

What’s verifiable here, and what isn’t

This case calls for more caution on numbers than most, so it’s worth being plain about what’s solid. The method, founder-led onboarding, a micro-creator strategy, creators telling their own stories, and word of mouth as the core growth driver, comes directly from Grant Lee’s own account and has been reported by Business Insider. That part is well sourced.

The economics of the program are not. Gamma hasn’t published the number of creators activated (the descriptions say “thousands”), the budget or its split, the signups attributed to creators, or a cost-per-acquisition. Figures that circulate in summaries, like a specific share of budget going to micro-creators, don’t trace to a confirmed primary source, so they’re left out here rather than repeated. And Gamma’s headline company numbers, its ARR and valuation, reflect the entire business, not the creator program, so reading them as proof the program worked would be a mistake. The honest version of this case is a strong method backed by one founder’s account, with the financial specifics deliberately left blank because they can’t be verified.

What’s repeatable

Strip away the parts you can’t verify and what remains is genuinely useful, because it doesn’t depend on any number. Onboard creators personally instead of briefing them at arm’s length. Choose micro-creators with real credibility over large accounts with shallow reach. Let creators tell their own story rather than handing them a script. And treat the program as amplification of word of mouth your product already earns, not as a substitute for having a product worth talking about.

None of those four moves requires Gamma’s budget, Gamma’s growth, or Gamma’s specific numbers. They require a product people genuinely like and the patience to do the unscalable onboarding work. That patience is the actual barrier, and it’s why most companies won’t copy this even though they easily could.

Conclusion

Gamma’s creator program is the cleanest argument in this cluster for a method over a metric. There’s no $1.1M headline here, and that’s fine, because the lesson was never a number. It’s that a founder treating creators as part of the product team, onboarding them by hand, choosing credibility over size, and letting them speak in their own voice, produces content that amplifies genuine word of mouth in a way a media buy never could.

The most expensive mistake the case warns against is the impatience that skips the onboarding. A company that buys creator posts at arm’s length, hands out scripts, and expects influence to manufacture demand its product hasn’t earned will get the opposite of Gamma’s result. The hand-onboarding that looks like wasted time is the entire difference. Do the slow part, and the program works. Skip it, and you’ve bought ads.

The Kast take

The thing we’d underline is that Gamma’s “unscalable” onboarding is only unscalable for a founder doing it alone. The work itself, walking each creator through the product, brainstorming their angle, making sure they have something real to say, doesn’t stop being necessary once a founder’s time runs out. It’s exactly the work that has to be handed to someone whose job it is to do it well, at volume, without losing the personal touch that made it work in the first place. That handoff is where most creator programs fall apart, and it’s where we spend our time.

The other thing worth sitting with is Grant Lee’s honesty that creators amplified word of mouth rather than created it. That’s the most useful and least flattering lesson in the case. If your product isn’t earning organic conversation, no creator program will rescue it, and a good agency should tell you that before taking your money. When the product is genuinely worth talking about, the creator program multiplies it, and running that multiplication well, the sourcing, the onboarding, the freedom to let creators be themselves, is the work we do every day at Kast.

Numbers attributed to Gamma reflect statements made publicly by its co-founder, largely on Lenny’s Podcast and reported by Business Insider, and have not been independently audited. Program economics (creator count, budget, CAC) are not publicly disclosed and are deliberately omitted. Company-level growth figures are excluded as they reflect Gamma’s whole business, not the creator program. Other patterns reflect a blend of Kast’s internal partnership data through Q1 2026 and publicly available industry benchmarks for the same period.