- cockroachlabs
https://www.cockroachlabs.com/
介绍说每月免费10GB，需要绑卡，首月有400$额度
类型：PostgreSQL
Monthly free Basic credits
Accounts with CockroachDB Basic clusters receive $15 of free resource utilization (equivalent to 50 million Request Units and 10 GiB storage) across all clusters. This benefit applies as a $15 credit on their monthly invoice.
A payment method must be added to the account to be elegible for this benefit, though it will only be charged for any usage above the $15 of free credits. Customers with annual or multi-year contracts are not elegible for the free monthly resource benefit.
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neon
https://neon.com/
免费500MB空间，长时间不用会停机
类型：PostgreSQL -
atlas
https://cloud.mongodb.com/
连接教程： 从 DBeaver 连接 - Atlas - MongoDB 文档
免费500MB空间
类型： MongoDB -
supabase
https://supabase.com/
免费500MB，好像可以开两个，看板全面
类型：PostgreSQL -
aiven （binaryYuki补充）
https://aiven.io/
类型：三种数据库，每个免费1GB
Valkey
Nodes: 1
Plan: Free-1
Specs: 1 CPU / 1 GB RAM
PostgreSQL
Nodes: 1
Plan: Free-1-5gb
Specs: 1 CPU / 1 GB RAM / 5 GB storage
MySQL
Nodes: 1
Plan: Free-1-5gb
Specs: 1 CPU / 1 GB RAM / 5 GB storage
- TiDB（lance6716提供）
据说每月25GB
官方原文：
Fully-managed cloud DBaaS for applications with variable workloads, available on AWS.
25 GB of row storage, 25 GB of column storage, and 250M Request Units (RUs) for free per month for each organization
$0.20 per additional GB of storage
$0.10 per additional 1M RUs
Pay only for the storage and capacity you use
Set spend limits so you don’t go over budget
Scale down to zero
类型： 多种可选
- sqlpub
https://sqlpub.com/
最大36000次/小时的请求、同时30个连接和500M存储空间
类型： Mysql