Agreed, and I won't pretend otherwise. That client is 19 months in on a rolling twelve and has expanded scope twice — but yes, it's the number to diligence hardest.
Halyard Studio
ProfitableDesign retainers for seed-stage fintech, fully documented
Launched July 23, 2026Berlin, Germany11,290 views
Maker
Ines Kowalczyk
Founder
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About this product
A three-person design agency with six retained clients on twelve-month contracts, a documented delivery system, and zero founder dependency on sales — every current client arrived through referral. Handover includes the playbook, the templates, and the client relationships.
Tech stack
FigmaWebflowNotionLinear
The steps that add five or six figures of value if you do them three months before talking to buyers.
Discussion
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31% customer concentration on a services business is the whole risk profile. One client leaving takes a third of revenue with it.
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