List of free database tool/service for developer👇🏽

Heroku
Heroku is a container-based cloud Platform as a Service (PaaS). Developers use Heroku to deploy, manage, and scale modern apps. Our platform is elegant, flexible, and easy to use, offering developers the simplest path to getting their apps to market.
Tag: database, hosting-dynamic, paas
550-1,000 dyno hours per month Deploy with Git and Docker Custom domains Container orchestration Automatic OS patching

PlanetScale
The database for developers PlanetScale is the only serverless database platform you can start in seconds and scale indefinitely.
Tag: database
3 free databases 10GB storage* 100 Million rows read/mo* 10 Million rows written/mo*

Firebase
Firebase helps you build and run successful apps Backed by Google and loved by app development teams - from startups to global enterprises
Tag: database, hosting, hosting-dynamic, hosting-static, storage, authentication, real-time
Authentication 10k/month Cloud Firestore (stored data: 1 GiB total) Realtime Database (stored data: 1 GB) Hosting storage 10 GB Cloud storage 5 GB

25 GB of Storage 25 provisioned Write Capacity Units (WCU) 25 provisioned Read Capacity Units (RCU) Enough to handle up to 200M requests per month.

Deta
A Cloud for the Next Billion Ideas. Build your apps in hours, deploy them in seconds.
Tag: serverless, database, hosting
Server: Python 3.7 or Node.js 12.x Unlimited Micros (MicroServer) 128 MB of RAM for each execution An execution times out after 10s Unlimited NoSQL database

Unlimited bases 1,200 records per base 2GB of attachments per base Grid, calendar, kanban, form, & gallery views

StaticBackend
Free and open-source self-hosted backend API enabling web and mobile developers to use common building blocks for applications. Easy to deploy Firebase alternative includes authentication, database, storage, real-time database and WebSocket, server-side functions, task scheduler, sending emails, and more.
Tag: API, database, storage, authentication, real-tie, serverless
Self-host a feature-rich backend API.

Railway
Railway is an infrastructure platform where you can provision infrastructure, develop with that infrastructure locally, and then deploy to the cloud.
Tag: Infrastructure, database, hosting
512 MB RAM 1 GB Disk Community Support Free 5$ of usage
SeaTable
SeaTable is the new flexible way for teams to work on tasks, projects or ideas.
Tag: product-management, collaboration, nocode, api, spreadsheet, database, task-management, productivity, remote
Unlimited number of tables 10,000 rows per account 2GB storage for file attachments Up to 25 team members 1 month versioning and snapshots Community support JavaScript and Python support

DBeaver Community
Free multi-platform database tool for developers, database administrators, analysts and all people who need to work with database
Tag: database, dbms

Azure Cosmos DB
Build applications on a fully managed, multi-master non-relational database service that offers support for NoSQL database APIs.
Tag: nosql, database
Always: 1000 request units/s with 5 GB storage
1 Year: 400 request units/s with 25 GB storage

Retool
Retool is the fast way to build internal tools. Drag-and-drop our building blocks and connect them to your databases and APIs to build your own tools, instantly. Connects with Postgres, REST APIs, GraphQL, Firebase, Google Sheets, and more. Built by developers, for developers. Trusted by startups and Fortune 500s. Sign up for free.
Tag: CMS, database, admin-panel, internal-tool
Connect to most databases or REST APIs Editor mode only Query library Up to 5 modules

Mockaroo
A free test data generator and API mocking tool - Mockaroo lets you create custom CSV, JSON, SQL, and Excel datasets to test and demo your software.
Tag: database, mock-data
No daily limit on the number of files downloaded from the browser 200 API requests/day 1x speed Access to all of features Hosted on mockaroo.com

Supabase
The Open Source Firebase Alternative Create a backend in less than 2 minutes. Start your project with a Postgres Database, Authentication, instant APIs, realtime subscriptions and Storage.
Tag: database, storage, authentication, real-time
Get free database, authentication and storage Unlimited API request Database space (Up to 500MB) Users 10.000 users Social Auth provider Storage Up to 1GB Transfer Limit Up to 2GB Team members: unlimited

Upstash
Serverless Database for Redis®. Designed for the serverless with per-request pricing and Redis API on durable storage.
Tag: redis, database, serverless
Max 10,000 Commands Daily

Appwrite
Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.
Tag: API, database, storage, authentication, serverless
Open Source
Directus
Open-Source Data Platform — Directus wraps any SQL database with a real-time GraphQL+REST API and an intuitive app for non-technical users. 100% JavaScript.
Tag: Database, SQL, GraphQL, API, CMS
Completely Free and Open-Source Works with any New or Existing SQL Database REST & GraphQL API Powerful Content/Data/Asset Management Completely Flexible Content Structure

Mongodb
The database for modern applications. MongoDB is a general purpose, document-based, distributed database built for modern application developers and for the cloud era.
Tag: database
NoSQL Mongo Database 512MB to 5GB of storage Shared RAM End-to-end encryption Built-in GUI for exploring and manipulating data

HarperDB
HarperDB is a SQL/NoSQL data management platform. It is fully indexed, doesn’t duplicate data, and runs on any device- from the edge to the cloud
Tag: database
Check harperdb pricing page
Hippobase
Self-host open source databases in one click. Hippobase makes it easy to self-host leading open source tools like Postgres and Mongodb
Tag: database
NocoDB
Free & Open Source Airtable alternative. Turns any SQL database into a smart spreadsheet. Supports MySQL, Postgres, SQL server, MariaDB & SQLite.
Tag: nocode, database

Sheety
Turn spreadsheets into powerful APIs to rapidly develop prototypes, websites, apps and more.
Tag: API, database
Unlimited Projects Read, Write, Edit and Delete 200 requests per month 100 rows per sheet