What is product-led growth (PLG)?

Written by Madalena Rugeroni, founder of Mazo · Updated 15 September 2026

Product-led growth (PLG) is a go-to-market motion in which the product itself acquires, activates, converts and expands customers: users sign up, reach value and often pay without talking to a salesperson. Where a sales team exists, it follows product usage instead of starting the first conversation. PLG suits lower-priced products that individual users can adopt.

When product-led growth fits

Mazo's rule of thumb: choose product-led growth when annual contract value is under about €5K, an end user can adopt the product without management buy-in, the product can show its full value in a free trial or free plan, and ideally its normal use involves sharing with others. If your self-serve funnel still needs a 45-minute onboarding call before anyone gets value, it's sales-led with extra steps.

The opposite conditions — committee decisions, long implementations, procurement — point to sales-led growth.

Worked example: a PLG funnel

A fictional reporting tool gets 1,000 signups in a month.

250 reach the activation milestone — a first report shared with a colleague — within 7 days: 25% activation rate.
40 of them upgrade to the €50-a-month plan: 4% of signups, 16% of activated users.
New MRR: 40 × €50 = €2,000.

Doubling signups adds €2,000. Lifting activation from 25% to 35% adds about €800 with no extra traffic — and usually better retention too. That's why PLG teams work on the product path before the top of the funnel.

The metrics that matter in PLG

Activation and time to value: Wes Bush's "bowling alley" is the model — a straight line from signup to first value, with product and email bumpers keeping users on it.
Product-qualified leads (PQLs): Blake Bartlett's point is that in PLG the funnel starts after signup. Sales talks to accounts that hit usage thresholds, not to whitepaper downloads.
Expansion: land small, expand on the value metric. In Bartlett's words, a PLG company with flat net revenue retention isn't PLG, it's just self-serve checkout.

Why it matters from €0 to €1M ARR

Pre-revenue to 10 customers: even PLG products get their first customers by hand. Watch people use the product and fix the path to first value.
Around €10k MRR: measure activation by weekly cohort and cut steps between signup and value.
€50k+ MRR: add PQL-based sales assist for larger accounts, and make expansion a priority.

Common PLG mistakes

Forcing virality into a single-player product. Andrew Chen's warning: it produces spam, not growth.
Scaling signups on weak retention. Elena Verna: acquisition scales the retention you already have, good or bad.
Measuring MQLs. In PLG, usage is the buying signal.
A free plan that gives away the paid value. See freemium vs free trial.

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FAQ

What is the difference between PLG and sales-led growth?

In product-led growth, users sign up, get value and often buy on their own, and sales follows usage. In sales-led growth, salespeople run discovery and demos and the customer signs before getting full value.

Does product-led growth mean no sales team?

No. Many PLG companies add sales assist once larger accounts appear, but sales reaches out to accounts that already use the product heavily, called product-qualified leads.

What is a product-qualified lead (PQL)?

A PQL is an account whose product usage crosses a threshold that signals buying intent, such as inviting teammates or hitting a plan limit. It replaces the marketing-qualified lead in product-led companies.

Who wrote this

Madalena Rugeroni built Mazo. She's an ex-Googler, a startup advisor and investor, and runs a portfolio of internet companies. Before that, as Head of Growth at Amplemarket, she scaled a B2B SaaS to $10M ARR. LinkedIn

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Further reading. Operators and books referenced: Wes Bush (Product-Led Growth), Blake Bartlett (OpenView), Andrew Chen, Elena Verna. These are published methodologies credited to their authors; Mazo is not affiliated with or endorsed by them.