2025 Complete Free Cloud Database List

Want to build a side project but the database alone costs money? Don't worry—2025 has plenty of free cloud databases available, with quite generous quotas.

This article compiles 7 of the most recommended free cloud databases, from MySQL to PostgreSQL to NoSQL. I'll tell you each service's free quota, limitations, and suitable scenarios, letting you start developing without spending a dime.

Further reading: Cloud Database Complete Guide | Understanding cloud database basics

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Why Choose Free Cloud Databases?

Scenarios Suitable for Free Plans

Free cloud databases aren't just for playing around—many serious use cases are suitable:

Learning and Practice Just starting backend development? Free databases let you practice SQL and learn database design without spending money.

Side Projects and MVPs Validating product concepts doesn't require burning money first. Build an MVP with free plans, and upgrade when someone's willing to pay.

Personal Portfolio That demo website on your resume needs a database? Free plans are completely sufficient and show you know cloud services.

Small Tools and Internal Systems Small internal company tools, low-traffic form systems—free quotas are usually more than enough.

Prototype Development and POC Building a POC (Proof of Concept) for clients? Get it running on free plans first, confirm viability, then discuss budget.

Free Plan Limitations and Considerations

There's no free lunch—free plans have some limitations to know about:

Performance Limitations

• Shared compute resources, may slow during peak times
• Connection limits, usually 5-20 simultaneous connections
• No SLA guarantee

Feature Limitations

• Usually no automatic backups (or very short retention)
• No high availability configuration
• Some advanced features locked

Data Limitations

• Storage caps (varying from 512MB to 5GB)
• Read/write count limits
• May not have cross-region replication

Commercial Limitations

• Some services prohibit free plans for commercial use
• Exceeding quota may stop service (not charge)

Bottom line: Free plans are suitable for development, testing, and small applications. For serious commercial systems, evaluate paid plans.

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7 Best Free Cloud Database Recommendations

1. Firebase Realtime Database / Firestore

Google's Firebase is the first choice for mobile apps, with generous free quotas.

Firestore Free Quota:

• 1 GB storage
• 50,000 reads/day
• 20,000 writes/day
• 20,000 deletes/day

Realtime Database Free Quota:

• 1 GB storage
• 10 GB/month download traffic
• 100 simultaneous connections

Suitable Scenarios:

• Mobile apps (iOS, Android, Flutter)
• Real-time sync applications (chat rooms, collaboration tools)
• Rapid prototyping

Pros:

• Real-time sync is super convenient—data changes update frontend immediately
• Complete SDKs, almost all platforms supported
• Seamless integration with other Firebase services (Auth, Hosting)

Cons:

• Limited query functionality, complex queries need manual handling
• Data structure design has learning curve
• Leaving Firebase ecosystem requires significant code rewriting

Want to learn more? See: Google Cloud Database Complete Tutorial

2. PlanetScale (MySQL Compatible)

PlanetScale is a MySQL-compatible serverless database with very generous free quotas.

Free Quota:

• 5 GB storage
• 1 billion reads/month
• 10 million writes/month
• 1 production branch + 1 development branch

Suitable Scenarios:

• Developers already familiar with MySQL
• Teams needing branching functionality
• Serverless architecture applications

Pros:

• MySQL compatible, existing projects easy to migrate
• Database branching works like Git
• Auto-scaling, no manual scaling needed
• Huge free quota—1 billion reads

Cons:

• No Foreign Key constraint support
• Free plan has no automatic backups
• Pricing adjusted in 2024, watch for term changes

If you're familiar with MySQL, PlanetScale is almost the best free choice. Detailed MySQL cloud integration: MySQL Cloud Database Integration Guide

3. Supabase (Open Source PostgreSQL Alternative)

Supabase is called the "open source Firebase" but uses PostgreSQL underneath.

Free Quota:

• 500 MB database storage
• 1 GB file storage
• 50,000 monthly active users (Auth)
• 500,000 Edge Function calls/month
• 2 projects

Suitable Scenarios:

• Developers who prefer PostgreSQL
• Need complete SQL functionality
• Want Firebase-like real-time features without lock-in

Pros:

• Full PostgreSQL—supports JOINs, foreign keys, stored procedures
• Built-in real-time subscriptions (Realtime)
• Open source project, no lock-in fears
• Built-in Auth, Storage, Edge Functions

Cons:

• Free plan projects pause after 1 week of inactivity
• 500 MB storage relatively small
• Relatively new, fewer community resources than Firebase

4. MongoDB Atlas Free Plan

MongoDB's official cloud service, the first choice for document databases.

Free Quota (M0 Shared Cluster):

• 512 MB storage
• Shared RAM
• Unlimited read/writes
• 100 connections

Suitable Scenarios:

• Projects already using MongoDB
• Applications with flexible data structures
• Node.js or Python backends

Pros:

• Official MongoDB service, best compatibility
• Multiple global regions available
• Built-in Charts visualization
• Permanently free, doesn't expire

Cons:

• 512 MB storage is a bit small
• Shared cluster, unstable performance
• No automatic backups

5. Neon (Serverless PostgreSQL)

Neon is a new generation serverless PostgreSQL, featuring auto-scaling and branching.

Free Quota:

• 0.5 GB storage (can accumulate to 10GB)
• 191 hours compute time/month
• Unlimited projects
• Database branching

Suitable Scenarios:

• Serverless architecture
• Teams needing database branching
• Test environments needing production data copies

Pros:

• True serverless, auto-pauses when not in use
• Powerful branching functionality
• Fast cold start (about 500ms)
• Deep Vercel integration

Cons:

• Compute time is limited, watch usage
• Relatively new service
• Free plan has no high availability

6. Turso (Edge SQLite)

Turso brings SQLite to the Edge, suitable for latency-sensitive applications.

Free Quota:

• 9 GB storage
• 500 databases
• 500 million reads/month
• 25 million writes/month

Suitable Scenarios:

• Latency-sensitive applications
• Static websites needing a database
• Personal projects and small applications

Pros:

• Edge deployment, ultra-low latency
• SQLite compatible, lightweight and easy to use
• Generous free quota (9GB)
• Embedded database experience

Cons:

• SQLite features are limited
• Not suitable for complex transaction processing
• Ecosystem still developing

7. CockroachDB Serverless

CockroachDB is a distributed SQL database, with a free serverless version.

Free Quota:

• 10 GB storage
• 50M Request Units/month
• Auto-scaling
• Multi-region deployment

Suitable Scenarios:

• Applications needing global distribution
• High availability requirements
• PostgreSQL compatibility needs

Pros:

• Born distributed, high availability
• PostgreSQL wire protocol compatible
• Free plan includes multi-region
• Serverless, pay per use

Cons:

• Request Units billing model takes adjustment
• Steeper learning curve
• May be overkill for small projects

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Free Cloud Database Comparison Table

Free Quota Comparison (Storage, Read/Write, Connections)

Service	Storage	Read Limit	Write Limit	Connections
Firebase Firestore	1 GB	50K/day	20K/day	-
PlanetScale	5 GB	1B/month	10M/month	1,000
Supabase	500 MB	Unlimited	Unlimited	60
MongoDB Atlas	512 MB	Unlimited	Unlimited	100
Neon	0.5 GB	Unlimited	Unlimited	-
Turso	9 GB	500M/month	25M/month	-
CockroachDB	10 GB	50M RU/month	50M RU/month	-

Feature Comparison

Service	Database Type	Real-time Sync	Branching	Auto Backup
Firebase	NoSQL	✅	❌	❌
PlanetScale	MySQL	❌	✅	❌
Supabase	PostgreSQL	✅	❌	❌
MongoDB Atlas	Document	✅	❌	❌
Neon	PostgreSQL	❌	✅	✅
Turso	SQLite	❌	❌	❌
CockroachDB	PostgreSQL	❌	❌	✅

Upgrade Plans and Pricing

Service	Cheapest Paid Plan	Features
Firebase	Blaze (Pay as you go)	Only charged when exceeding free quota
PlanetScale	Scaler $29/month	More quota + auto backup
Supabase	Pro $25/month	8GB storage + no pausing
MongoDB Atlas	M2 ~$9/month	Dedicated resources + backup
Neon	Launch $19/month	More compute time
Turso	Scaler $29/month	More storage and read/writes
CockroachDB	Pay as you go	Only charged when exceeding free quota

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Major Cloud Platform Free Tiers

Besides the specialized services above, major cloud platforms also have free tiers. Detailed comparison: AWS vs GCP vs Azure Database Complete Comparison

AWS Free Tier Database Services

AWS offers 12 months of free trial:

RDS (Relational Database):

• 750 hours/month of db.t2.micro or db.t3.micro
• 20 GB general purpose SSD storage
• 20 GB backup storage

DynamoDB (NoSQL):

• 25 GB storage (permanently free)
• 25 read capacity units
• 25 write capacity units

Note: After 12-month trial ends, RDS will charge. DynamoDB free quota is permanent.

GCP Free Tier

GCP's free options:

Cloud SQL:

• No permanently free tier
• New users get $300 credit (90 days)

Firestore:

• 1 GB storage (permanently free)
• 50,000 reads/day
• 20,000 writes/day

GCP's database free quota is relatively conservative, but the $300 credit can last a while.

Azure Free Account

Azure offers:

Azure SQL Database:

• 12 months free (250 GB S0 instance)

Cosmos DB:

• 1,000 RU/s free (permanent)
• 25 GB storage

Azure's free SQL Database quota is generous, suitable for .NET developers.

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How to Choose the Right Free Plan?

By Project Type

Building a Mobile App? → Firebase is the first choice—complete SDKs, great real-time sync

Building a Web Application? → Supabase or PlanetScale—complete SQL functionality

Building an API Backend? → PlanetScale (MySQL) or Neon (PostgreSQL)

Static Website + Database? → Turso—Edge deployment, low latency

AI/ML Project? → MongoDB Atlas—JSON format is flexible

By Tech Stack (MySQL, PostgreSQL, NoSQL)

Team Familiar with MySQL: → PlanetScale (fully compatible) → Or use major platform MySQL services

Team Familiar with PostgreSQL: → Supabase (most complete features) → Neon (great serverless experience) → CockroachDB (need distributed)

Detailed MySQL cloud integration tutorial: MySQL Cloud Integration Guide

Need NoSQL: → Firebase (real-time sync) → MongoDB Atlas (document database)

Not Sure What to Use: → Start with Supabase—PostgreSQL has the most complete features, easy to switch later

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Still not sure which to choose after reading this? Every project has different needs, and choosing wrong makes migration troublesome. Schedule a free consultation and let us analyze the best solution for you.

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FAQ

Are Free Cloud Databases Really Free?

Really free, but with quota limits. As long as your usage is within the free quota, you won't be charged. Some services stop automatically when quota is exceeded, others start charging—read the terms carefully before registering.

Can Free Plans Be Used in Production?

Technically yes, but not recommended. Free plans usually have no SLA guarantee, no automatic backups, and unstable performance. For money-making production products, recommend upgrading to paid plans—a few dozen dollars monthly saves a lot of trouble.

What Happens When Free Quota Is Exceeded?

Different services handle it differently:

• Firebase: Blaze plan automatically charges
• PlanetScale: Service pauses, need to upgrade to continue
• Supabase: Project pauses
• MongoDB Atlas: Continues running but performance limited

Recommend setting usage alerts to get notified when approaching quota.

Is Data Safe in Free Plans?

Mainstream services' security is fine—all have encryption, access control, and other basic protections. But free plans usually have no automatic backups, you need to export data regularly yourself. Also, free plans may reserve the right to delete inactive accounts in their terms—keep your own backups of important data.

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Conclusion

2025 has many free cloud database options, from MySQL to PostgreSQL to NoSQL, with more generous quotas than before.

Quick Recommendations:

• Building Apps → Firebase
• Need MySQL → PlanetScale
• Need PostgreSQL → Supabase or Neon
• Need NoSQL → MongoDB Atlas
• Need Maximum Free Space → CockroachDB (10GB) or Turso (9GB)

Free plans are suitable for learning, development, and small projects. When traffic grows and you need stability and backups, upgrading to paid plans isn't too late.

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Need Professional Advice?

Free plans have their limitations. As your project grows, you'll face these issues:

• Free quota almost used up—which plan should you upgrade to?
• Need to migrate from free service to enterprise solution—what's the smoothest way?
• How to choose between multiple services for best value?

CloudInsight Free Cloud Consultation can help you:

✅ Assess Current State: Analyze your usage, predict when you'll exceed free quota ✅ Compare Plans: Compare paid plans across services, find the best value ✅ Migration Planning: If service change needed, plan lowest-risk migration path ✅ Cost Optimization: Ensure you don't pay for features you don't use

Schedule Free Consultation

Click to Schedule 30-Minute Free Consultation

No matter which free plan you're currently using, we can give you objective advice.

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Further Reading

• Cloud Database Complete Guide
• AWS vs GCP vs Azure Database Complete Comparison
• MySQL Cloud Database Integration Guide
• Google Cloud Database Detailed Tutorial

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References

1. Firebase Pricing - Google Firebase Documentation
2. PlanetScale Pricing and Plans
3. Supabase Pricing - Free Tier Details
4. MongoDB Atlas Pricing - Free Shared Clusters
5. Neon Pricing - Free Tier Specifications
6. Turso Pricing Plans
7. CockroachDB Serverless Free Tier