Mirror sites (1:1 microsites) for Series A companies: the 90-day install for PE-backed portfolio companies
The exact 90-day plan for standing up mirror sites (1:1 microsites) at Series A — the point where the founder can no longer be every function. Written for operating partners and portfolio CEOs inside private equity.
This edition is written for operating partners and portfolio CEOs inside private equity. In PE-backed portfolio companies, PE-backed operators run on 90-day cycles and reward operating rigor over storytelling, so the way you install mirror sites (1:1 microsites) has to reflect that reality from day one.
Series A is the moment mirror sites (1:1 microsites) stops being optional. The founder has to step out of some of the work, the plan requires a defensible growth number, and every quarter compounds toward the next raise.
Day 1 to 30: diagnosis and instrumentation. Name the constraint, write the ICP, wire meeting rate from account-specific URLs into the board pack.
Day 31 to 60: first live cycle at 20% of planned volume. Founder still in every review. Kill criteria written and enforced.
The binding constraint we see in PE-backed portfolio companies is almost always predictable execution against a hold-period thesis. Mirror sites (1:1 microsites) is only useful in this vertical when it is pointed at that constraint — not at a generic growth number borrowed from another category.
Day 61 to 90: ramp to full volume, hire the first dedicated operator, and hand off ops. Founder retains strategy and the weekly review.
By day 90 the metric is legible and the trajectory is defensible. This is what turns a Series A story into a Series B round.
Trap most Series A companies fall into: using them as brochures instead of sales rooms. It usually shows up around day 45 when the founder tries to hire ahead of the model.
The Series A version of mirror sites (1:1 microsites) looks small compared to what you will build at Series B. That is the point — it is a foundation, not a monument.
Concretely for PE-backed portfolio companies: the portfolio companies that install this hit the next value-creation milestone on schedule. That is the reason it is worth installing mirror sites (1:1 microsites) properly rather than half-heartedly across three vendors.
Frequently asked questions
Microsites · PE-backed — answered
- Does mirror sites (1:1 microsites) work for PE-backed portfolio companies?
- Yes — provided it is aimed at predictable execution against a hold-period thesis rather than a generic growth number. The portfolio companies that install this hit the next value-creation milestone on schedule.
- Should we start mirror sites (1:1 microsites) before Series A?
- Yes if the founder has time; the Series A version is the same model at higher spend.
- How much of the round should fund mirror sites (1:1 microsites)?
- Meaningful — often 20–30% of the growth line — but only after diagnosis.
- When do we hire the first mirror sites (1:1 microsites) operator?
- Around day 60, once the model has run one full cycle with the founder.
- What Series A trap should we avoid?
- Using them as brochures instead of sales rooms — usually a premature senior hire.
- What is the PE-backed specific pitfall with mirror sites (1:1 microsites)?
- Running the generic playbook without adapting to PE-backed operators run on 90-day cycles and reward operating rigor over storytelling. The install has to be vertical-first.
Growth Broker editorial
Filed under microsites · pe-backed