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FoundationDB vs Manhattan

FoundationDB: Apple's ordered, strictly serializable distributed key-value store, built to have layers on top. Manhattan: Twitter's in-house, multi-tenant, eventually consistent key-value store with pluggable storage engines.

key differences

  • Licensing: FoundationDB is open source (permissive) (Apache License 2.0); Manhattan is proprietary (Proprietary (internal only)).
  • Manhattan is built for larger datasets (Multi-PB) than FoundationDB (≤ 1 PB).
  • Transactions: FoundationDB offers full ACID; Manhattan offers limited.
  • Only FoundationDB has transactions, pub/sub, encryption at rest.
  • Only Manhattan has compression.

choose foundationdb for

  • +Metadata stores for larger systems (catalogs, object stores)
  • +Foundation for custom databases and layers
  • +Multi-tenant app backends via the Record Layer
  • +Transactional queues and job systems

best at · OLTP, Metadata, Queue

choose manhattan for

  • +Reference design for multi-tenant, multi-datacenter key-value platforms
  • +Studying pluggable storage engines and replica reconciliation

best at · OLTP, Time-series

FoundationDBApple's ordered, strictly serializable distributed key-value store, built to have layers on top.
ManhattanTwitter's in-house, multi-tenant, eventually consistent key-value store with pluggable storage engines.
overview
Primary model
Key-Value
Key-Value
Also supports
–
Time-Series
Type
Database engine
Database engine
Status
Active
Active
Developer
Apple
Twitter (now X Corp.)
First release
2013
2012
Latest version
7.3.77 (Apr 16, 2026)
–
License
Open source (permissive)Apache License 2.0
ProprietaryProprietary (internal only)
Free tier
✓
—
popularity
WhichDB Score
36.8
0.0
Rank
#54
#775
GitHub stars
16.8K
–
Stack Overflow questions
37
–
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Massive (Multi-PB)
Horizontal scaling
Native
Native
Multi-region
Read replicas
Active active
ACID
Full
Limited
Consistency
Strong
Eventual, Strong
Schema
Schemaless
Schemaless
Architecture
Distributed, Client server
Distributed, Multi primary
deployment
Self-hosted
✓
—
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
–
capabilities
Transactions
✓
—
Joins
—
—
Secondary indexes
—
—
Full-text search
—
—
Vector search
—
—
Geospatial
—
—
JSON
—
—
Change data capture
—
—
Triggers
—
—
Stored procedures
—
—
Materialized views
—
—
TTL / expiry
—
—
Pub/Sub
✓
—
Columnar storage
—
—
In-memory
—
—
Durable persistence
✓
✓
Compression
—
✓
Encryption at rest
✓
—
Role-based access
—
—
Time travel
—
—
Branching
—
—
Online schema changes
—
—
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
FoundationDB API
Key-value API
Client languages
C, Python, Java, Go, Ruby, Rust, JavaScript, Swift
–
Best for
OLTP, Metadata, Queue
OLTP, Time-series
Add more to this comparisonNot sure either fits? Try smart match

FoundationDB vs Manhattan: FAQ

What is the difference between FoundationDB and Manhattan?

FoundationDB: Apple's ordered, strictly serializable distributed key-value store, built to have layers on top. Manhattan: Twitter's in-house, multi-tenant, eventually consistent key-value store with pluggable storage engines. Licensing: FoundationDB is open source (permissive) (Apache License 2.0); Manhattan is proprietary (Proprietary (internal only)). Manhattan is built for larger datasets (Multi-PB) than FoundationDB (≤ 1 PB). Transactions: FoundationDB offers full ACID; Manhattan offers limited.

When should I choose FoundationDB over Manhattan?

Choose FoundationDB for metadata stores for larger systems (catalogs, object stores); foundation for custom databases and layers; and multi-tenant app backends via the Record Layer. Choose Manhattan for reference design for multi-tenant, multi-datacenter key-value platforms; and studying pluggable storage engines and replica reconciliation.

Is FoundationDB or Manhattan more popular?

FoundationDB ranks #54 on the WhichDB Score (36.8/100) and Manhattan ranks #775 (0.0/100). Popularity is not fit: check the requirements that matter for your project.

Are FoundationDB and Manhattan open source?

Yes. FoundationDB is open source. License: Apache License 2.0. No. Manhattan is proprietary, closed-source software.