Strategy

What is PLG (Product-Led Growth)?

B2B marketing definition, context, and 42 Agency's operator take.

Last updated: April 23, 2026

The short answer

Product-led growth (PLG) is a go-to-market motion where the product itself drives acquisition, activation, conversion, and expansion — replacing or augmenting the traditional sales-led funnel with self-serve product experiences.

Definition

In a PLG motion, users can try, adopt, and often buy the product without talking to sales. The core mechanics:

• Free entry point — free tier, free trial, or freemium model that lets users experience value before commitment
• Activation milestones — product behaviors that predict long-term retention (Slack's "2,000 messages sent," Dropbox's "file uploaded")
• Product Qualified Leads (PQLs) — users whose product behavior signals readiness to upgrade or expand
• Expansion motions — usage-driven upsells, team invites, paid feature gates

PLG doesn't eliminate sales — most PLG B2B companies layer sales on top for enterprise motion. It changes which part of the funnel sales enters and on what signals.

Why it matters

PLG inverts the qualification model. Instead of MQLs based on content engagement, the primary signal is product usage. This means the marketing ops stack needs to ingest product data, and the sales motion needs to be built around usage-driven outreach instead of cold qualification calls.

It also changes the economics. Customer acquisition cost goes down because the product does some of the qualification work, but monetization takes longer because users can extract value without upgrading. Revenue per user is generally lower; retention and expansion matter more.

42's take

Most "PLG" motions we audit are actually hybrid — a free tier bolted onto a sales-led motion, not a real product-led one. That's fine, but the measurement has to reflect it. If product usage drives 60% of qualified pipeline and sales-led drives 40%, the attribution model needs to credit both and the team needs clear routing rules for which leads go where.

The hard part isn't the product tier. It's the handoff: when does a self-serve user become a sales conversation, and who owns the signal? Without clear rules, sales either ignores product signals or annoys users who are happy in self-serve.

Frequently asked questions

What is the difference between PLG and freemium?

Freemium is one monetization model within PLG — a permanent free tier with paid upgrades. PLG is the broader go-to-market motion; it can use freemium, free trials, reverse trials, or other free-entry patterns. Not all PLG is freemium.

What is a PQL versus an MQL?

A Product Qualified Lead (PQL) is based on in-product behavior — activation milestones, usage depth, team invites. An MQL is based on marketing engagement like content downloads and webinar attendance. PQLs are higher signal in PLG motions because the user has already experienced product value.

Can enterprise B2B companies run PLG?

Yes — usually as a hybrid. The product drives acquisition and activation, but sales takes over for larger accounts once usage or expansion signals cross a threshold. Companies like Notion, Linear, and Airtable run this pattern.