"Powered by" co-branded badge
A small, often-mandatory brand mark embedded in the customer's own public-facing output that turns every viewer into a prospect.
A visible attribution — a footer link, a watermark, a 'Powered by X' badge — placed on whatever the customer shares publicly: a booking page, a form, a generated document, a widget. Unlike an invite, nobody has to decide to promote the product; the product promotes itself as a side effect of being used in public.
Why this ring
One of the best-documented embedded growth loops in SaaS, with a clear mechanism and a long track record across scheduling, forms and website builders — genuinely low risk once the product has a public-facing output to attach it to.
SaaS fit
Only works for products whose output is seen by someone other than the paying user — scheduling pages, forms, generated sites, widgets, transactional emails. Irrelevant for products with no public-facing surface.
How to apply it
When to apply: The product produces something a third party actually sees — a page, a form, a widget, an email footer — not just something the paying user looks at privately.
First steps: Attach a small, unobtrusive badge or credit line to that public surface by default on lower-tier plans, link it straight to a signup page primed with context (e.g. 'this page was built with X'), and make removing it a paid feature rather than a design compromise.
Pitfalls: Making the badge removable free of charge (or trivially) kills the loop entirely; making it so intrusive that customers feel embarrassed by it pushes them toward competitors that don't badge their output.
Metrics to watch: Signups attributed to badge click-throughs, viral coefficient from badge exposure, and the share of paid upgrades driven specifically by badge removal.
Resources
- 5 Examples of SaaS Products With Viral Loops — OpenView's breakdown of embedded badge loops across Calendly, Typeform and similar tools.
- Your guide to product virality — Frames embedded/badge loops as the lowest-friction viral mechanic because users never decide to share.
Who does it well
- Calendly — Free-plan invitees see a mandatory 'Powered by Calendly' link on every booking page; roughly a quarter of new signups reportedly start by spotting the badge in someone else's calendar.
- Typeform — Puts a 'Powered by Typeform' credit on every shared survey, turning each respondent into a potential prospect.