Product-Led Growth (PLG)

What is Product-Led Growth (PLG)?

Product-led growth (PLG) describes a customer acquisition strategy in which the product itself is the most important sales channel. Users sign up without a sales conversation, experience the benefit in their own use and complete the purchase and later expansions largely through self-service. Personal sales is added only when customers need larger contracts or special terms.

The term stands in contrast to sales-led growth, in which field sales and sales teams initiate and negotiate every deal. Which route is chosen is a fundamental go-to-market decision (GTM Strategy) with consequences for cost structure, organisation and the financial model. PLG is often combined with a permanently free entry tier (Freemium) or with a time-limited trial period.

Prerequisites for Product-Led Growth

Self-service as a sales channel works only if several conditions come together:

• Fast value: The core benefit becomes apparent in the first session or the first few days, not only after an implementation project.
• Entry without barriers: Registration and first use require no data migration, no approval from the IT department and no individually negotiated contract.
• Price within the user's own authority: The entry price is at a level that a user or team leader can decide on without a procurement process.
• Growing need: With more users, data or projects, the occasion arises for higher tiers and thus for expansion within the existing customer base.

The model reaches its limits where the purchase does not rest with the person using the product. In German companies, software frequently goes through procurement and a data protection review. If it is suitable for monitoring the behaviour or performance of employees, the works council has a right of co-determination under Section 87(1) no. 6 of the German Works Constitution Act (Betriebsverfassungsgesetz, BetrVG). If the provider processes personal data on behalf of the customer, the customer also needs a data processing agreement with it.

PLG metrics from sign-up to purchase

The number of sign-ups says little, because it can be increased with advertising budget. What is meaningful is the chain that follows:

• Activation rate: share of registered users who reach a defined core usage within a set period, for example the first completed transaction in the product
• Time to core value: time from registration to this core usage
• Conversion rate: share of activated users who take out a paid plan, evaluated by cohort; measured against all sign-ups, it is correspondingly lower
• Self-service share: part of new business that comes about without sales involvement
• Acquisition costs and payback: costs of marketing and in-product onboarding per new paying customer (customer acquisition cost, CAC). In addition there is the time until they flow back from gross profit (revenue less direct costs) (CAC Payback Period). In-product onboarding guides new users through the first steps.

Relationship to personal sales

Product-led growth rarely replaces sales entirely. Hybrid forms are widespread: small customers buy through self-service. A sales team approaches in a targeted way organisations in which many employees already use the product or whose usage points to a larger need. It thus starts with accounts that already know the benefit. In such companies, a dedicated team of product, engineering, marketing and data analysis is often responsible for activation and conversion, the PLG or growth team.

Which form works depends on the contract value (ACV). At low annual values, personal sales can hardly be financed; at high annual values and complex procurement processes it is necessary anyway. Growth does not automatically become cheaper through PLG: what falls away in sales flows into product development, in-product onboarding, documentation and support.

Product-led growth in funding rounds and due diligence

Investors assess PLG above all by the efficiency of growth. The questions are whether acquisition costs remain low when the budget rises, whether conversion is stable across cohorts and whether the existing customer base grows through expansion. A common rule of thumb is a payback of acquisition costs in less than twelve months and a ratio of customer value to acquisition costs of at least 3 to 1 (LTV/CAC Ratio). A company that grows efficiently and with strong revenue retention generally achieves a higher multiple on its recurring revenue (Revenue Multiple).

The due diligence reconciles usage data with billing and questions how activation is defined. The legal review clarifies whether the recording of user behaviour is permissible under data protection law, above all whether the necessary consents are in place for analytics tools. It also covers the terms of use and the ordering process, that is, the question whether contracts are validly concluded online.

Worked example: acquisition costs in the PLG funnel

A software provider acquires customers through self-service. In one quarter the funnel looks as follows; the gross margin is 80%.

• Sign-ups: 10,000
• Activation of 30%: 3,000 activated users
• Conversion of 8% of those activated: 240 new paying customers, 2.4% of all sign-ups
• New monthly recurring revenue at EUR 50 per customer: 240 × 50 = EUR 12,000
• Costs for marketing and in-product onboarding: EUR 90,000 per quarter
• Acquisition costs per customer: 90,000 / 240 = EUR 375
• Gross profit per customer: 50 × 80% = EUR 40 per month
• Payback: 375 / 40 = around 9.4 months

If activation rises to 40% through improved in-product onboarding, 4,000 × 8% = 320 customers are acquired at the same cost. Acquisition costs fall to EUR 281.25 and payback to around 7.0 months. By comparison: a sales model with EUR 1,500 monthly revenue per customer and EUR 21,600 acquisition costs pays back at the same margin only after 21,600 / 1,200 = 18 months. Although each customer there brings in 30 times as much revenue, the payback is above the common benchmark of twelve months, while the self-service model is below it.

Distinctions: PLG, freemium, sales-led growth and viral loop

• Freemium: a pricing model with a permanently free basic version. Product-led growth is a sales strategy that also works with a time-limited trial or a paid entry.
• Sales-led growth: customer acquisition through personal sales with meetings, quotes and negotiation. The purchase takes place before actual use, not after it.
• Viral Loop: a mechanism in which users bring new users through invitations or shared content. It can reinforce product-led growth but is not a prerequisite for it.

Common mistakes

• PLG as a cost-saving measure. A company that cuts sales without investing in in-product onboarding, documentation and support saves sales costs but wins fewer customers. Acquisition costs per customer do not necessarily fall as a result.
• Acquisition costs calculated too narrowly. If only advertising costs are counted and the costs of in-product onboarding, trial periods or free users are left out, acquisition costs appear lower than they are. Investors recalculate them in due diligence.
• Sign-ups as the measure of success. What matters is the share of users who reach the core benefit and pay.
• Activation not defined. Without a fixed definition of core usage, the activation rate can be shaped at will and is not reliable in due diligence.
• No sales for large accounts. Extensive contracts with security and contractual requirements rarely come about without personal support.

Frequently asked questions

Is product-led growth the same as freemium?

No. Freemium stipulates that a basic version remains free. Product-led growth describes that the product carries customer acquisition, regardless of whether the entry is free, free for a limited time or paid.

Does product-led growth work in the German Mittelstand?

To a limited extent. Data protection reviews, co-determination and the wish for a fixed contact person often favour an accompanied closing. As an entry through a business department, self-service nevertheless works, and the company-wide contract then follows through sales.

Which metric is the most important in product-led growth?

There is no single one, but the activation rate stands at the beginning of the chain. It influences conversion, churn and acquisition costs alike; the worked example shows the effect on acquisition costs.

When does a sales team pay off alongside self-service?

As soon as accounts emerge whose usage suggests a significantly larger contract than they conclude through self-service. The sales team is then measured on the expansion of these accounts, not on winning new sign-ups.

The Roemer Capital view

For companies that grow through self-service, Roemer Capital looks first at the activation rate and its development across cohorts before a funding round. The number of sign-ups comes afterwards. Growth through sign-ups can be generated with budget, stable activation cannot; it is therefore the figure on which investors base their view of the model's viability.

In the financial model, Roemer Capital maps the funnel from registration to paying customer step by step and plans any sales effort for large accounts as a separate cost block. This keeps it visible which part of growth comes from the product and which from sales.