Billing account that does not get charged
Must be manually upgraded to a paying account
Still requires a credit card for verification
$300 USD credit that can last 12 months
"When your trial ends, your account will be paused and you'll have the option to upgrade to a paid account."
Excellent for learning!
"Business accounts are not eligible for the free trial."
Has some restrictions
No more than 8 vCPUs (total simultaneous)
No GPUs (video cards chips)
No TPUs (custom chips for TensorFlow)
No Quota increases
No crypto-mining allowed
No premium OS licenses (e.g. Windows)
No Cloud Launcher products with extra usage fees
Always free is a certain amount of different services that you can use without having to pay for it.
"Always Free usage does not count against your free trial credits."
Last beyond the end of the free trial
Each day (24hr/day) you can run worth of an f1-micro instance in most US regions.
28hr/day of App Engine runtime, in North America
2M/month of Cloud Functions invocations (with certain runtime/size limits)
Storage averaged over the month
5 GB of Regional Cloud Storage, including some operations
1 GB of Cloud Datastore storage, including some operations
10 GB of BigQuery storage, with 1 TB/month of query processing
30 GB HDD storage on GCE and AE
5 GB snapshot storage on GCE and AE
5 GB of StackDriver logs with 7-day retention
Egress (data going out) to China and Australia not free!
1 GB/month of App Engine data egress
1 GB/month of Compute Engine data egress
5 GB/month of egress by Cloud Function invocations
10 GB/month of Cloud PubSub messages
120 build-minutes/day of Google Cloud Container Builder
60 minutes/month of Google Cloud Speech API recognition from audio/video
1,000 units/month of Cloud Vision API calls
5,000 units/month Google Cloud Natural Language API
Google Cloud Shell with 5 GB of persistent disk storage quota
1 GB of Google Cloud Source Repositories private hosting
Export must be set up per billing account
Resources should be placed into appropriate projects
Resources should be tagged with labels
Billing export is not real-time
Delay in hours