For me it's that Zapier has a lot more control over the integration logic - Being able to conditionally operate on Trello fields and Google Sheets columns makes

For me it's that Zapier has a lot more control over the integration logic - Being able to conditionally operate on Trello fields and Google Sheets columns makes automation much more doable. To me it's like an advanced for of IFTTT when you need that extra power. I still use IFTTT a lot for device to device work. But for APIs I find Zapier much more comprehensive.