Try or ByeTry or Bye

FaunavsMongoDB Atlas

Saas0
vs
Saas65

Score Comparison

0
Overall
65
0
Pricing
50
0
Usability
65
0
Performance
70
0
Support
65
0
Reliability
75
0
Onboarding
70
0
Security
80
0
Integrations
75
FaunaMongoDB Atlas

Signals Comparison

Reliability

Fauna

  • SERVICE SHUT DOWN - May 30, 2025(10/10)
  • Open source release promised but no timeline(7/10)

MongoDB Atlas

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

Fauna

  • Costs did not scale to $0 like truly serverless(7/10)
  • Dashboard usage consumed operations(4/10)

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)
Usability

Fauna

  • FQL query language had steep learning curve(6/10)
  • Type system difficult to debug(4/10)

MongoDB Atlas

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

Fauna

  • Documentation gaps for new product(5/10)

MongoDB Atlas

No signals

Customization

Fauna

  • No transactions spanning multiple requests(6/10)
  • Company pivoted focus from developers to enterprise(6/10)

MongoDB Atlas

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

Fauna

  • Lacked full-text search capability(5/10)

MongoDB Atlas

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

Fauna

No signals

MongoDB Atlas

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

Pricing Comparison

Fauna

SERVICE DISCONTINUED
Free

Users: N/A

Storage: N/A

Limits: Cannot sign up or use - service terminated

Service no longer available - migrate to alternatives
Free Tier (Historical)
Free

Users: N/A

Storage: 5GB (was)

Limits: Historical reference only - service shut down

Service terminated - no longer applicable
Pay-Go (Historical)
$25/mo

Users: N/A

Storage: Pay per GB

Limits: Historical reference only - service shut down

Flat monthly fee + overages regardless of usage

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

FeatureFaunaMongoDB Atlas
Database
Document + Relational

Was unique

Document Database (NoSQL)

Flexible schemas

ACID Transactions

Historical

SQL Queries

FQL only

Infrastructure
Global Distribution

Historical

Multi-Cloud (AWS/Azure/GCP)
Serverless

Historical

Global Clusters
Search
Atlas Search

Full-text search

Full-Text Search

Never had

API
GraphQL Support

Historical

AI
Vector Search

For AI/ML apps

Status
Active Service

SHUT DOWN

Reliability
Automatic Failover

Replica sets

Licensing
Open Source

Promised, no timeline

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

Deployment
Self-Hosted Option

Was cloud-only