Control that converts: how device management protected Jusbrasil's revenue and boosted profits by ~20%

Company
Jusbrasil
Year
2025
Status
Shipped

The problem

Jusbrasil had become one of the most widely used B2C products among lawyers in Brazil. As usage scaled, we started seeing discrepancies between product usage and our subscriber base.

We had a strong signal that accounts were being shared.

The signal

I paired behavioral data with interviews to find out what multi-device use actually was.

  1. 01

    Multiple devices didn't mean account sharing

    Legitimate customers regularly switched between work and personal devices.

  2. 02

    Sharing was often about convenience

    A password was simply the easiest way to give someone access.

  3. 03

    A hard block would create unnecessary friction

    Controlling access is not the same as preventing it.

  4. 04

    Multi-device usage was the norm

    80%+ of paying users accessed Jusbrasil from multiple devices.

The opportunity

Turn access control into a path to legitimate usage and subscriber growth.

Rather than treat every extra device as abuse, add friction gradually and leave a way out. The goal wasn't to stop sharing — it was to convert it.

Before
New deviceat onceBlocked
After
New devicedetectedIdentifyapproachingWarnreachedLimit$ buy accessResolve
The shift: one block at the door becomes a sequence the customer can see coming.

Exploration

I explored how to introduce friction without breaking the experience.

I designed and tested different approaches to device limits, warnings, verification and additional access.

The device-control file in Figma: pages for the disconnect flow and the seats upgrade vision beside a canvas of labelled flows — authentication, desktop, and new subscription — each a run of screens wired together with connectors.
All the flows were designed based on previous learnings, and the best decisions were made after design critiques with peers.

The trade-off

How much friction can we introduce before legitimate users start feeling punished?

Based on everything we knew at this point, we made a decision. Instead of outright blocking additional devices, we introduced warnings and limits gradually, giving legitimate users a clear path to continue.

What we learned

The restriction worked better when customers understood why.

Testing showed that users needed clear context before being blocked — and a clear path to resolve the restriction.

Iteration

01

Progressive warnings

Customers received increasingly clear warnings before reaching the device limit. I wrote every piece of copy with our compliance team, so the blocking system explained itself.

All design screens are based on product modals that appear mid-flow, keeping users focused within the context of use.
02

Verification

A verification step helped distinguish legitimate access from unauthorized sharing. The verification flow was designed to be straightforward and assist users in making their decisions.

The last-switch warning, framed to convert rather than punish — and what acknowledging it opens onto.
03

Self-service access

Customers can purchase additional access instead of being permanently blocked, allowing us to increase growth opportunities and protect our revenue.

At the limit — disconnect a device, or buy the access to keep both.

Results

Control without turning the experience hostile.

+20%
revenue from seat expansion
+50%
shared accounts blocked

Unmanaged sharing went down, and part of it turned into revenue.