Rate limits can be enforced for a number of reasons (i.e. to prevent spam or abuse). Here is a summary of rate limits for some triggers and actions on IFTTT:
| Service | Trigger, Query, or Action | Free Limit | Pro Limit | Pro+ Limit |
| IFTTT AI Services | All AI service queries | Not available | Not available | 200 queries per day across all AI services |
| Blogger | Create photo post | 5 per day | 25 per day | 25 per day |
| Create a post | 5 per day | 25 per day | 25 per day | |
| Box | Upload file from URL | 30MB file size | 30MB file size | 30MB file size |
| Append to a text file | 2MB file size | 2MB file size | 2MB file size | |
| Dropbox | Add file from URL | 30 MB file size | 30 MB file size | 30 MB file size |
| Append to a text file | 2MB file size | 2MB file size | 2MB file size | |
| Send me an email | 30 per day | 750 per day | 750 per day | |
| Evernote | Append to note | 30 per hour | 30 per hour | 30 per hour |
| Google Drive | Upload file from URL | 30MB file size | 30MB file size | 30MB file size |
| Google Sheets | Add row to spreadsheet* | 2,000 rows | 2,000 rows | 2,000 rows |
| Phone call | Call my phone | Not available | 100 per month | 100 per month |
| SMS | Send me an sms | Not available | 100 per month (US, Canada) 10 per month (worldwide) |
100 per month (US, Canada) 10 per month (worldwide) |
| Post a tweet | Not available | 200 per day | 200 per day | |
| Post a tweet with image | Not available | 200 per day | 200 per day | |
| Update profile picture (with option to tweet) | Not available | 200 per day | 200 per day | |
| Update bio (with option to tweet) | Not available | 200 per day | 200 per day | |
| New photo from you | 100/trigger | 100/trigger | 100/trigger | |
| You are tagged in a photo | 100/trigger | 100/trigger | 100/trigger | |
| Webhooks | Not available | 240/minute | 240/minute |
*After 2,000 rows a new spreadsheet will be created by your Applet
More information on rate limits can be found here.