The 150-Person Wall: Why Your Best-Performing Playbook Might Be Sabotaging Your Next Market

Findings from PhD research interviewing founders and VCs across Europe’s fastest-scaling digital companies

A sales leader I interviewed for my PhD research had watched her company grow from 70 people to over 1,000 in three years — she’d joined as an entry-level rep and was, by the time we spoke, running a team of 160 people across multiple countries. Few people are better placed to describe exactly where scaling starts to hurt, and exactly what breaks first.

Her answer surprised me, because it wasn’t about hiring, or cash, or competition. It was about a number.

“You Are Not a Community Anymore”

“They say that for us to know everyone in our group, the group can be maximum 150 people,” she told me. “When it grows more than 150, you are not a community anymore.”

Below that threshold, coordination happens almost for free. You know everyone. A quick word in the hallway is enough. A message in one Slack channel reaches the whole team. Above it, something qualitatively changes — not gradually, but almost like crossing a line. The same message now needs to travel through layers of managers, and by the time it reaches the last person in the chain, there’s no way to verify it arrived intact, or arrived at all.

She described one specific failure this created: a manager she’d hired simply wasn’t executing what he’d been told, repeatedly, and it took her far too long to notice, because the usual signal — someone visibly not doing their job in a small, tightly-knit team — no longer worked at this size. Nobody was lying to her. The information had just quietly stopped flowing.

The Fix Wasn’t a Tool. It Was Repetition.

Her solution wasn’t a new piece of software, and she was candid about how unglamorous it actually is: repetition, on a schedule, enforced through structure rather than hope.

Weekly one-on-ones with every direct report, where she’d write down commitments and follow up the following week without fail. A standing email list for anything that needed to reach the whole team at once, with an explicit expectation of a reply. And a simple rule of thumb she’d internalized: if a message needs to land with a six-person team, you might get away with saying it once. At scale, “if this number is like 200 people, you have to repeat it 200 times.”

Alongside the repetition, she rebuilt a sense of community deliberately, rather than assuming it would happen on its own — team-specific rituals, recognition given publicly to both senior and junior team members, monthly all-manager meetings whose real purpose was letting managers get to know each other, not just receive updates from her.

The Second, Quieter Trap: Copy-Pasting What Worked

The same interview surfaced a second challenge that’s easy to miss because it looks, from the outside, like good practice: taking what clearly worked in your home market and rolling it out everywhere else, unchanged.

Her company’s playbook had been refined over years in Spain — sales scripts, inbound/outbound team structures, marketing materials — all built through genuine trial and error. When it came time to expand into other markets, the instinct was to hand new teams the finished formula rather than the years of learning that had produced it.

It created friction that took a while to properly diagnose: new-market teams asking why they didn’t have the same materials, the same track record, the same polish — not realizing that what they were being compared against was the result of years of iteration they hadn’t been given time to go through themselves. “We were kind of missing all the track, or the experience, that the Spanish market had,” she reflected. The fix was structural too: putting local people in charge of each new market who understood it well enough to adapt the model rather than inherit it wholesale, rather than trying to run every market centrally from the home office.

What This Means If You’re Scaling a Team Right Now

Two failure modes, one root cause: at a certain size, what used to travel through relationships has to travel through systems instead — and the systems have to be built deliberately, before the old, informal way of doing things quietly stops working and nobody notices until something breaks.

If you’re leading a team that’s crossed, or is approaching, that inflection point — where updates aren’t landing the way they used to, or a market expansion feels like it’s fighting the playbook that worked everywhere else — this is one of the more common and more solvable growth bottlenecks scaleups run into.

If this sounds familiar, I’d welcome a conversation. Forás Consulting works with scaleup leaders to diagnose exactly these kinds of growth bottlenecks, using a structured methodology built on primary research rather than recycled advice.