# Sunset Flows vs. Preference Centers: Two Ways to Fight Email List Churn

**Short answer:** A sunset flow _proactively_ removes or suppresses disengaged subscribers before they hurt your deliverability; a preference center _reactively_ gives subscribers a way to stay on your list at a frequency or topic mix they actually want. They solve different halves of the churn problem, and the strongest Klaviyo programs run both.

## The two kinds of churn

Email list churn comes from two directions:

1. **Silent disengagement**—people who stop opening but never unsubscribe. Left alone, they drag down open rates, deliverability, and sender reputation.
2. **Active exit**—people who click unsubscribe. Every one is a customer you can no longer email.

Sunset flows address the first; preference centers and [branded unsubscribe pages](/articles/klaviyo-unsubscribe-link-guide) address the second.

## What is a sunset flow?

A sunset flow is a Klaviyo automation that identifies profiles with no engagement over a defined window (say, 90–120 days of no opens or clicks), optionally sends a last-chance re-engagement email, and then suppresses those who still don't respond. The goal is to stop mailing people who aren't listening—before their inactivity poisons your metrics.

- **Trigger:** prolonged disengagement.
- **Direction:** proactive—you act before they complain or churn.
- **Outcome:** a cleaner, more engaged list and better deliverability.

Last Chance's [retention health](/docs/retention-health) audit checks whether you have a sunset flow (plus win-back and post-pause flows) configured.

## What is a preference center?

A [preference center](/docs/user-preferences) is a page where subscribers choose how they hear from you—email frequency, topics, or a temporary [pause](/articles/pause-subscription-vs-unsubscribe)—instead of leaving entirely. On Klaviyo, you can route the "manage preferences" link (and the unsubscribe link) to a [branded Last Chance preference center](/docs/klaviyo-preference-center-setup).

- **Trigger:** a subscriber choosing to adjust their relationship.
- **Direction:** reactive—you catch intent at the moment someone considers leaving.
- **Outcome:** retained subscribers on a cadence they tolerate, and fewer hard opt-outs.

## Sunset flow vs. preference center: side by side

|                 | Sunset flow             | Preference center                   |
| --------------- | ----------------------- | ----------------------------------- |
| Targets         | Silently disengaged     | Actively considering leaving        |
| Timing          | Proactive               | Reactive                            |
| Mechanism       | Suppress non-openers    | Offer frequency/topic/pause choices |
| Primary benefit | Protects deliverability | Retains subscribers                 |
| Who initiates   | You (automation)        | The subscriber                      |

## Why you need both

They're complementary, not competing. A preference center keeps willing subscribers on a lighter cadence; a sunset flow removes the truly disengaged so your engaged audience keeps landing in the inbox. Running only a sunset flow means you still lose people who would have stayed at a lower frequency. Running only a preference center means dead weight keeps dragging your reputation down. Together they reduce both silent decay and active churn. For the tactics that feed both, see [how to reduce your unsubscribe rate](/articles/how-to-reduce-email-unsubscribe-rate).

## Where Last Chance fits

Last Chance powers the reactive side—branded unsubscribe and preference pages with pause, frequency, and topic controls—and its [retention health](/docs/retention-health) audit and [churn intelligence](/docs/churn-intelligence) tools help you stand up the proactive side (sunset, win-back, and post-pause flows) in Klaviyo. [Start a free trial](/auth/signup) to put both halves in place.

## FAQ

### What is the difference between a sunset flow and a preference center?

A sunset flow proactively suppresses subscribers who have stopped engaging, protecting your deliverability. A preference center reactively lets subscribers choose a lower frequency, different topics, or a pause instead of unsubscribing. One cleans your list; the other retains people who would otherwise leave.

### Should I use a sunset flow or a preference center?

Use both. They address different causes of list churn—silent disengagement versus active exit—and work best together. A preference center keeps willing subscribers at a tolerable cadence, while a sunset flow removes the truly unresponsive.

### Does a preference center hurt deliverability?

No—done well, it helps. By letting subscribers dial down frequency or pause instead of unsubscribing (or worse, marking you as spam), a preference center reduces complaints and keeps more engaged recipients on your list. Pair it with a sunset flow to remove the genuinely disengaged.