Database

Product Type Free Tier? Free Limit Pricing page
Fauna NoSQL
100 MB Fauna
mongoDB NoSQL
512 MB mongoDB
Cloud Firestore Cloud Firestore NoSQL
1 GiB Cloud Firestore
AWS dynamoDB AWS dynamoDB noSQL
25GB AWS dynamoDB
Heroku Heroku SQL
10K Rows Heroku
Cloudflare workers KV Cloudflare workers KV NoSQL
1GB Cloudflare workers KV
AWS RDS AWS RDS SQL
N/A AWS RDS
Google Cloud SQL Google Cloud SQL SQL
N/A Google Cloud SQL
Azure SQL Azure SQL SQL
N/A Azure SQL
IBM Db2 IBM Db2 SQL
100 MB IBM Db2
Don't see your favourite tech here? Let me know what I should include in a GitHub Issue