Try or ByeTry or Bye

FirebasevsMongoDB Atlas

Platform62
vs
Saas65

Score Comparison

62
Overall
65
45
Pricing
50
70
Usability
65
65
Performance
70
50
Support
65
75
Reliability
75
90
Onboarding
70
85
Mobile
–
70
Security
80
75
Integrations
75
FirebaseMongoDB Atlas

Signals Comparison

Mobile

Firebase

  • SDK size bloats mobile apps(5/10)

MongoDB Atlas

No signals

Pricing

Firebase

  • Costs skyrocket unexpectedly at scale(9/10)
  • Read/write operations add up quickly(7/10)
  • SMS authentication costs vary wildly by country(6/10)

MongoDB Atlas

  • Pricing gets expensive and complicated at scale(8/10)
  • Vendor lock-in with Atlas-specific APIs(8/10)
  • Data egress costs rack up quickly(7/10)
  • Backup costs add up beyond base pricing(6/10)
Customization

Firebase

  • Severe vendor lock-in with Google ecosystem(8/10)

MongoDB Atlas

  • Configuration options hidden behind tiers(5/10)
Usability

Firebase

  • Firestore query limitations frustrate developers(8/10)
  • Console UI can be confusing and slow(5/10)

MongoDB Atlas

  • Dashboard and UI need improvement(6/10)
Performance

Firebase

  • Cold starts plague Cloud Functions(7/10)

MongoDB Atlas

  • Query performance can be sluggish(7/10)
  • Consumes more storage than relational databases(6/10)
Support

Firebase

  • Support is limited without paid GCP plan(6/10)

MongoDB Atlas

No signals

Reliability

Firebase

  • January 2026 App Hosting build failures(7/10)

MongoDB Atlas

  • UAE region extended outage (March 2026)(8/10)
Security

Firebase

  • Security rules have a steep learning curve(7/10)

MongoDB Atlas

No signals

Integrations

Firebase

  • Firebase features lag behind modern alternatives(6/10)

MongoDB Atlas

  • AWS VPC connection can be problematic(6/10)

Pricing Comparison

Firebase

Spark (Free)
Free

Users: Unlimited Auth users

Storage: 1GB Firestore, 5GB Cloud Storage

Limits: Daily quotas reset, no outbound networking, limited to Google services only

No Cloud Functions, no extensions, no phone auth beyond limits
Blaze (Pay as you go)
Popular
$0/mo

Users: Unlimited

Storage: Pay per GB

Limits: Requires credit card, costs can spike without budget alerts configured

Firestore: $0.18/100K reads, $0.18/100K writes, $0.026/GB-day storage. Egress: ~$0.15/GB. SMS: $0.01-0.06+/message. Functions: $0.40/million invocations
Cloud Functions
$0.4/mo

Users: N/A

Storage: N/A

Limits: Only on Blaze plan, cold starts, 9-minute timeout (2nd gen), memory limits

Compute time charges separately, cold starts affect performance, egress costs apply
Firestore
$0.18/mo

Users: N/A

Storage: $0.18/GB-month

Limits: Query limitations (no OR, 10 whereIn limit), no native full-text search

Network egress extra, index costs, real-time listeners count as reads

MongoDB Atlas

Free (M0)
Free

Users: N/A

Storage: 512MB

Limits: 512MB limit, no VPC peering, no dedicated support, shared cluster performance

No backups, limited connections, shared resources affect performance
Flex Tier
$8/mo

Users: N/A

Storage: 5GB

Limits: Variable workloads only, not for consistent high-throughput

Storage charges extra, data transfer adds up, backup costs separate
Dedicated M10
Popular
$57/mo

Users: N/A

Storage: 10GB

Limits: Entry production tier, may need M30+ for significant workloads

Data transfer $0.02-0.15/GB, backup storage extra, Atlas Search indexing costs
Dedicated M30
$390/mo

Users: N/A

Storage: 40GB

Limits: ~$0.54/hour, still entry-level for larger workloads

All data transfer and backup costs apply, Atlas features may cost extra

Feature Comparison

FeatureFirebaseMongoDB Atlas
Auth
Authentication

Multi-provider

Database
Document Database (NoSQL)

Flexible schemas

Firestore Database

NoSQL real-time

SQL Queries

NoSQL only

PostgreSQL

NoSQL only

Infrastructure
Multi-Cloud (AWS/Azure/GCP)
Hosting

CDN included

Global Clusters
Backend
Cloud Functions

Blaze only

Search
Atlas Search

Full-text search

Full-text Search

Needs Algolia/Elastic

AI
Vector Search

For AI/ML apps

Storage
Cloud Storage

For files/media

Analytics
Analytics

Free, integrated

Reliability
Automatic Failover

Replica sets

Monitoring
Crashlytics

Free

Pricing
Free Tier (M0)

Perpetual, 512MB

Transparent Pricing

Complex cost model

Features
Built-in Auth/Storage

Needs external tools

Real-time Subscriptions

Limited vs Supabase