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Amazon Aurora PostgreSQL Limitless Database vs Citus

Amazon Aurora PostgreSQL Limitless Database: Managed horizontal sharding for Aurora PostgreSQL: one endpoint over a serverless group of shards. Citus: Postgres extension that shards tables across nodes for multi-tenant SaaS and real-time analytics.

key differences

  • Licensing: Amazon Aurora PostgreSQL Limitless Database is proprietary (Proprietary (AWS service)); Citus is open source (copyleft) (GNU AGPL v3).
  • Amazon Aurora PostgreSQL Limitless Database is built for larger datasets (Multi-PB) than Citus (≤ 1 PB).
  • Only Amazon Aurora PostgreSQL Limitless Database has encryption at rest.
  • Only Citus has full-text search, vector search, geospatial, change data capture, triggers.
  • Amazon Aurora PostgreSQL Limitless Database has a serverless option; Citus does not.

choose amazon-aurora-limitless for

  • +Very high write-rate Postgres workloads on AWS
  • +Multi-tenant SaaS sharded by tenant ID
  • +Replacing application-level Postgres sharding
  • +Large ledgers and event tables beyond one writer

best at · OLTP, Metadata, Ledger

choose citus for

  • +Multi-tenant B2B SaaS sharded by customer
  • +Real-time analytics dashboards over event data
  • +Time-series and IoT ingestion with rollups
  • +Scaling an existing Postgres app without changing databases

best at · OLTP, Real-time analytics, HTAP

Amazon Aurora PostgreSQL Limitless DatabaseManaged horizontal sharding for Aurora PostgreSQL: one endpoint over a serverless group of shards.
CitusPostgres extension that shards tables across nodes for multi-tenant SaaS and real-time analytics.
overview
Primary model
Relational
Relational
Also supports
Document
Document, Columnar / OLAP, Spatial
Type
Managed service
Extension
Status
Active
Active
Developer
Amazon Web Services
Microsoft (Citus Data)
First release
2024
2016
Latest version
–
14.3.0 (Oct 23, 2026)
License
ProprietaryProprietary (AWS service)
Open source (copyleft)GNU AGPL v3
Free tier
—
✓
popularity
WhichDB Score
0.8
21.1
Rank
#602
#144
GitHub stars
–
12.8K
Stack Overflow questions
–
149
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Native
Multi-region
None
None
ACID
Full
Full
Consistency
Strong
Strong
Schema
Strict
Strict
Architecture
Distributed, Serverless, Shared storage
Distributed, Client server
deployment
Self-hosted
—
✓
Vendor-managed cloud
✓
✓
Serverless
✓
—
Embedded
—
—
Edge
—
—
Clouds
AWS
Azure
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
SQL, PL/pgSQL
SQL, PL/pgSQL
Client languages
Java, Python, JavaScript, Go, C#, Ruby, PHP
Java, Python, JavaScript, Go, Ruby, C#, PHP, Rust
Best for
OLTP, Metadata, Ledger
OLTP, Real-time analytics, HTAP, Time-series
Add more to this comparisonNot sure either fits? Try smart match

Amazon Aurora PostgreSQL Limitless Database vs Citus: FAQ

What is the difference between Amazon Aurora PostgreSQL Limitless Database and Citus?

Amazon Aurora PostgreSQL Limitless Database: Managed horizontal sharding for Aurora PostgreSQL: one endpoint over a serverless group of shards. Citus: Postgres extension that shards tables across nodes for multi-tenant SaaS and real-time analytics. Licensing: Amazon Aurora PostgreSQL Limitless Database is proprietary (Proprietary (AWS service)); Citus is open source (copyleft) (GNU AGPL v3). Amazon Aurora PostgreSQL Limitless Database is built for larger datasets (Multi-PB) than Citus (≤ 1 PB). Only Amazon Aurora PostgreSQL Limitless Database has encryption at rest.

When should I choose Amazon Aurora PostgreSQL Limitless Database over Citus?

Choose Amazon Aurora PostgreSQL Limitless Database for very high write-rate Postgres workloads on AWS, multi-tenant SaaS sharded by tenant ID and replacing application-level Postgres sharding. Choose Citus for multi-tenant B2B SaaS sharded by customer; real-time analytics dashboards over event data; and time-series and IoT ingestion with rollups.

Is Amazon Aurora PostgreSQL Limitless Database or Citus more popular?

Citus ranks #144 on the WhichDB Score (21.1/100) and Amazon Aurora PostgreSQL Limitless Database ranks #602 (0.8/100). Popularity is not fit: check the requirements that matter for your project.

Are Amazon Aurora PostgreSQL Limitless Database and Citus open source?

No. Amazon Aurora PostgreSQL Limitless Database is proprietary, closed-source software. Yes. Citus is open source. License: GNU AGPL v3.