Amazon RDS vs Nile
SEPT 2026 auditA comparison of Amazon RDS and Nile built from values read directly from each provider's own documentation, with the source recorded against every figure.
The short answer
Choose Amazon RDS if…
Teams already inside AWS, where the database sitting in the same VPC as everything else is worth more than any single feature on this page. Six engines, up to 35 days of point-in-time recovery, and read replicas you create and delete yourself.
Editorial · Palash Bagchi · approved
Choose Nile if…
Multi-tenant SaaS where every customer wants isolation — Nile makes a database per tenant the default shape rather than something you build on top of Postgres.
Editorial · Palash Bagchi · approved
Consider something else if…
- Amazon RDS: You want a database per pull request. RDS documents no branching, and replicas are manual — AWS states outright that it does not autoscale them.
- Nile: Several of the features on its own pricing table are marked Coming soon, including branching, backups and provisioned compute, so what is bought today is narrower than the table suggests.
2 sourced criteria separate them — see where, with sources, below.
Pick the criteria you care about. The chart counts how many of them lean toward each provider — the same read as scanning the bars below, just totalled for the ones you chose.
Amazon RDS 0
Nile 0
At a glance.
| Criterion | Amazon RDS | Nile |
|---|---|---|
| Execution | ||
| Managed connection pooling | Supported | Supported |
| Data | ||
| Engine | PostgreSQL, alongside MySQL, MariaDB, Oracle, SQL Server and Db2. Each engine is a separate RDS product with its own version list and its own feature support, so a capability documented for one is not a capability of RDS as a whole. | PostgreSQL, with tenant isolation as a first-class concept — databases, tenant databases and vector embeddings are all described as unlimited. |
| Connection limit | Not a fixed number: RDS for PostgreSQL sets max_connections by formula from the instance's memory — LEAST({DBInstanceClassMemory/9531392}, 5000) — so a bigger instance class gets more connections and the ceiling is 5,000 however large it is. The parameter can be set by hand anywhere from 6 to 262,143, which is a limit on what you may configure rather than what an instance will serve. Other engines use different divisors: MySQL is memory/12582880 with no cap. | 10,000 connections on Pro, with connection pooling included. |
Where they differ.
Engine
- Amazon RDS
- PostgreSQL, alongside MySQL, MariaDB, Oracle, SQL Server and Db2. Each engine is a separate RDS product with its own version list and its own feature support, so a capability documented for one is not a capability of RDS as a whole.
- Nile
- PostgreSQL, with tenant isolation as a first-class concept — databases, tenant databases and vector embeddings are all described as unlimited.
Sources (2) →Sources ↓
- Amazon RDS for PostgreSQL — Amazon Relational Database Service User Guide ↗
“Amazon RDS supports DB instances running several versions of PostgreSQL. [...] DB instances running PostgreSQL support Multi-AZ deployments, read replicas, Provisioned IOPS, and can be created inside a virtual private cloud (VPC).”
Read 2026-09-09 · official docs
- Pricing — Nile ↗
“multi-tenant applications with Nile's Postgres Unlimited Databases Unlimited Tenants Pay for queries Not for instances Limitless vector embeddings”
Read 2026-09-06 · official site
Connection limit
- Amazon RDS
- Not a fixed number: RDS for PostgreSQL sets max_connections by formula from the instance's memory — LEAST({DBInstanceClassMemory/9531392}, 5000) — so a bigger instance class gets more connections and the ceiling is 5,000 however large it is. The parameter can be set by hand anywhere from 6 to 262,143, which is a limit on what you may configure rather than what an instance will serve. Other engines use different divisors: MySQL is memory/12582880 with no cap.
- Nile
- 10,000 connections on Pro, with connection pooling included.
Sources (2) →Sources ↓
- Quotas and constraints for Amazon RDS — Amazon Relational Database Service User Guide ↗
“PostgreSQL max_connections 6–262143 LEAST({DBInstanceClassMemory/9531392}, 5000) Maximum number of concurrent connections [...] DBInstanceClassMemory is in bytes.”
Read 2026-09-09 · official docs
- Pricing — Nile ↗
“# of connections 10,000 Connection pooling”
Read 2026-09-06 · official pricing
When these numbers change, hear about it. Sources are re-checked monthly; a repricing goes out as a short note.
Documented by only one.
These criteria are published by one provider and not the other. An absence here means we have not found a source, not that the feature is missing.
Questions this comparison answers.
Should I choose Amazon RDS or Nile?
Pick Amazon RDS if Teams already inside AWS, where the database sitting in the same VPC as everything else is worth more than any single feature on this page. Six engines, up to 35 days of point-in-time recovery, and read replicas you create and delete yourself.
Pick Nile if Multi-tenant SaaS where every customer wants isolation — Nile makes a database per tenant the default shape rather than something you build on top of Postgres.