# Whisperr

> Whisperr is retention that runs itself: an autonomous retention engine for mobile apps, games and e-commerce. It spots the users who are about to leave, brings them back with the right push or email at the right moment, and shows you how many it kept.

Works for mobile apps, SaaS, e-commerce and games.

## Set up

- [setup.md](https://whisperr.net/setup.md): step-by-step install for coding agents
- Setup prompt: "Set up Whisperr in this app. Fetch https://whisperr.net/setup.md and follow it."
- MCP server: https://mcp.whisperr.net/install for installs, https://mcp.whisperr.net/mcp for every tool (Streamable HTTP, OAuth 2.1)

## Read

- [llms-full.txt](https://whisperr.net/llms-full.txt): the homepage, pricing and answer pages in full, in one file
- [index.md](https://whisperr.net/index.md): the homepage as markdown
- [pricing.md](https://whisperr.net/pricing.md): plans, prices and billing rules
- [Docs index](https://docs.whisperr.net/llms.txt): SDKs, ingestion API and the agent kit
- [Journal](https://whisperr.net/blog): retention playbooks ([as markdown](https://whisperr.net/blog/index.md))
- [Security](https://whisperr.net/security), [Privacy](https://whisperr.net/privacy), [Terms](https://whisperr.net/terms), [DPA](https://whisperr.net/dpa), [Sub-processors](https://whisperr.net/subprocessors)

## Guides

- [How do you reduce churn in a subscription app?](https://whisperr.net/guides/how-to-reduce-churn-in-a-subscription-app.md): Find the users drifting away before they cancel, reach them on a channel they can receive, fix failed payments, and measure what you keep against a holdout.
- [How do you predict churn in a subscription app?](https://whisperr.net/guides/how-to-predict-churn-in-a-subscription-app.md): The behaviour signals that predict churn in a subscription app, how to score them per user, and why a prediction is only useful if it changes what you send.
- [How do you reduce trial-to-paid drop-off in a subscription app?](https://whisperr.net/guides/how-to-reduce-trial-to-paid-drop-off.md): Get trial users to the moment the app proves its value, remind them before the trial ends, and treat users who never started differently from users who stalled.
- [How do you win back cancelled subscribers?](https://whisperr.net/guides/how-to-win-back-cancelled-subscribers.md): Act while the user still has access, find out why they left, and send a few specific messages about what changed, not a stream of discounts.
- [How do you run a holdout test for retention messaging?](https://whisperr.net/guides/how-to-run-a-holdout-test-for-retention-messaging.md): Keep a random group of users out of every retention message, compare their retention with everyone else's, and wait for enough users before you trust the gap.
- [Retention emails vs push notifications, which works better?](https://whisperr.net/guides/retention-emails-vs-push-notifications.md): When to use push and when to use email for retention in a subscription app, and why the right answer is per user, not per campaign.

## Compare

- [Whisperr vs Braze](https://whisperr.net/compare/whisperr-vs-braze.md): Braze is a full engagement platform your team runs. Whisperr decides, writes and sends retention messages per user. How they compare on setup, price and proof.
- [Whisperr vs OneSignal](https://whisperr.net/compare/whisperr-vs-onesignal.md): OneSignal delivers the push, email, SMS and in-app messages you set up. Whisperr decides who gets a retention message and can send it through OneSignal.
- [Whisperr vs Customer.io](https://whisperr.net/compare/whisperr-vs-customer-io.md): Customer.io runs the campaigns your team designs. Whisperr decides, writes and sends retention messages per user. How they compare for subscription apps.
- [Whisperr vs CleverTap](https://whisperr.net/compare/whisperr-vs-clevertap.md): CleverTap combines analytics and multichannel engagement your team runs. Whisperr decides, writes and sends retention messages per user. How they compare.
- [Whisperr vs Airship](https://whisperr.net/compare/whisperr-vs-airship.md): Airship is an enterprise mobile engagement platform your team runs. Whisperr decides, writes and sends retention messages per user. How they compare.
- [Whisperr vs Superwall](https://whisperr.net/compare/whisperr-vs-superwall.md): Superwall runs and tests your paywalls. Whisperr keeps subscribers after they pay, with per-user push and email. They do different jobs and work together.
- [Whisperr vs Churnkey](https://whisperr.net/compare/whisperr-vs-churnkey.md): Churnkey runs cancel flows and failed-payment recovery for web billing. Whisperr messages app users per user before they cancel. How they compare.
- [Whisperr vs Adapty](https://whisperr.net/compare/whisperr-vs-adapty.md): Adapty runs in-app subscriptions, paywalls and revenue analytics. Whisperr keeps subscribers with per-user push and email. How they fit together.

## Alternatives

- [Braze alternatives for subscription apps](https://whisperr.net/alternatives/braze-alternatives.md): Five Braze alternatives for subscription apps, from retention that runs itself to lower-cost messaging platforms, with channels and published prices.
- [OneSignal alternatives for subscription apps](https://whisperr.net/alternatives/onesignal-alternatives.md): Five OneSignal alternatives for subscription apps, from per-user retention to full engagement platforms, with channels and published prices.
- [Customer.io alternatives for subscription apps](https://whisperr.net/alternatives/customer-io-alternatives.md): Five Customer.io alternatives for subscription apps, from per-user retention to enterprise engagement platforms, with channels and published prices.
- [CleverTap alternatives for subscription apps](https://whisperr.net/alternatives/clevertap-alternatives.md): Five CleverTap alternatives for subscription apps, from per-user retention to campaign platforms, with channels and published prices.