Author Gene Marks, a Forbes Contributor focusing on "technologies helping companies" analyzes that "[IFTTT] absolutely crushes Google Alerts". Describing IFTTT as a “workflow system in the cloud” the article argues that this technology outperforms the functionality offered by Google Alerts.
Google describes Alerts as a product to “monitor the web for interesting new content”. However, a closer analysis brings to light one major difference between both tools: they address different user needs.
In sum, the difference in functionality between both tools does not offer an explanation why IFTTT should crush Google Alerts. From a user perspective both tools address different needs and cannot be used interchangeably.