# Know when the stack changes.

Ecommerce intelligence for app and plugin companies. Follow merchant app additions, replacements and platform changes.

Reach the merchants whose next technology decision connects to your product.

## Watch the relevant category

Follow changes in subscriptions, email, reviews, loyalty, returns and checkout. Scope signals around the merchant need your app addresses.

## Understand a competitive change

An app appearing or disappearing from a storefront can prompt research. Verify the change and merchant context before assuming a purchase, cancellation or dissatisfaction.

## Build a partner motion

An adjacent app installation can identify complementary needs. Give partnerships and sales a concrete reason to revisit an account.

## Illustrative workflow

Event: A Shopify merchant adds a subscription app

Meaning: Recurring orders may create new retention needs.

Action: Check whether your lifecycle or analytics app adds complementary value.

## Related pages

- [SignalTally Radar](https://signaltally.com/product/radar): Find the merchant fit. Inspect the evidence. Prepare the next step.
- [Explore Shopify intelligence](https://signaltally.com/product/shopify-intelligence): Real theme and payment observations. Three audiences built for app growth.
- [Find your signals](https://signaltally.com/product/signals): Explore themes, apps and platform changes.
- [Discuss your market](https://signaltally.com/contact): Tell us which merchants matter to you.
- [Commerce Observatory](https://signaltally.com/research/commerce-observatory): Original research from 3.13M Shopify domains.
- [Agent Evaluation Kit](https://signaltally.com/developers): Working code. Dated evidence. A structured handoff.
- [Plan your first 30 days](https://signaltally.com/launch): Define your audience and the value you want to test.
- [Build your market](https://signaltally.com/product/market-builder): Size an audience using real theme and payment evidence.
- [Explore the commerce graph](https://signaltally.com/product/commerce-graph): Follow the connections behind selected merchant observations.
- [Align your buying team](https://signaltally.com/enterprise/evaluation): Create a shared evaluation brief and decision criteria.

Canonical source: [SignalTally](https://signaltally.com/solutions/saas)

[Data and attribution guide](https://signaltally.com/llms.txt)