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Database & Data Management · head to head

Amazon RDS vs QuestDB

Amazon RDS logo

Amazon RDS

Database & Data Management

Set up, operate, and scale a relational database in the cloud

From
On request
Rated
-
Full reviewWebsite
QuestDB logo

QuestDB

Database & Data Management

Fast open source time-series database for high throughput ingestion

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only QuestDB has a free tier, so it costs nothing to try first.
  • Each has a real cost: Amazon RDS no super-user access or direct host connectivity limits advanced customization; QuestDB open-source edition lacks high-availability, distributed architecture, and enterprise security features
  • They diverge on capability: Amazon RDS covers Multiple DB Engines, QuestDB covers High Throughput Ingestion.

Where they differ

Only the attributes on which Amazon RDS and QuestDB actually diverge.

Attributes where Amazon RDS and QuestDB differ
AttributeAmazon RDSQuestDB
Starting priceOn requestFree
Pricing modelUnknownopen-source
Free tierNoYes
PlatformsAWS Cloud, Multi-AZ, Multi-regionDocker, Kubernetes, Cloud (AWS, Azure, GCP)
Founded20062014

Identical on both: user rating (Not yet rated), category (Database & Data Management).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Amazon RDS

  • Multiple DB Engines
  • Automated Backups
  • Multi-AZ Deployment
  • Read Replicas
  • Encryption
  • Performance Insights
  • Automatic Scaling
  • MySQL

Only in QuestDB

  • High Throughput Ingestion
  • SQL Support
  • Time-series Optimization
  • SIMD Vectorization
  • Column-oriented Storage
  • Built-in Web Console
  • InfluxDB Line Protocol
  • Grafana

Both cover

  • PostgreSQL
  • Web support

What people use each for

The jobs each tool is most often brought in to do.

Amazon RDS

  • Transaction processingnot QuestDB
  • Data storagenot QuestDB
  • Application backendnot QuestDB
  • Reportingnot QuestDB
  • Data analyticsnot QuestDB

QuestDB

  • Time-series analytics ingesting up to 20M rows/second from IoT sensors or financial data feedsnot Amazon RDS
  • Real-time dashboarding with 32ms time-to-first-row latency for minute-level analyticsnot Amazon RDS
  • Applications requiring multi-tier storage (hot ingest, real-time SQL, cold Parquet archive)not Amazon RDS

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Amazon RDS

  • No super-user access or direct host connectivity limits advanced customization
  • Pricing unpredictable and expensive compared to GCP alternatives with equivalent features
  • Limited access to system procedures and tables requiring advanced permissions
  • No Oracle RAC (Real Application Clusters) support for high-availability Oracle deployments

QuestDB

  • Open-source edition lacks high-availability, distributed architecture, and enterprise security features
  • Enterprise edition pricing not published; requires contacting sales for custom quote
  • Ingestion limit of 20M rows/sec platform-dependent; may not scale to extreme throughput requirements

Pricing, plan by plan

Amazon RDS

On request

No published plan breakdown. See the Amazon RDS review.

QuestDB

Free

No published plan breakdown. See the QuestDB review.

Which should you pick?

Choose Amazon RDS if

  • You need multiple db engines.
  • You work on AWS Cloud, Multi-AZ, Multi-region.
  • You also want automated backups.
Amazon RDS review

Choose QuestDB if

  • You need high throughput ingestion.
  • You want to start without paying.
  • You work on Docker, Kubernetes, Cloud (AWS, Azure, GCP).
  • You also want sql support.
QuestDB review

Questions people ask

Is Amazon RDS or QuestDB better?
Neither clearly leads. Amazon RDS starts at On request and QuestDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amazon RDS or QuestDB?
QuestDB has a free tier; the other does not. Paid plans start at On request for Amazon RDS and Free for QuestDB.
Does Amazon RDS or QuestDB run on more platforms?
Amazon RDS runs on AWS Cloud, Multi-AZ, Multi-region. QuestDB runs on Docker, Kubernetes, Cloud (AWS, Azure, GCP).
Can I use QuestDB for free?
Yes. QuestDB has a free tier, so you can try it without paying. Amazon RDS starts at On request.
What is Amazon RDS best used for?
Amazon RDS is most often used for transaction processing, data storage, application backend, reporting. Of those, transaction processing and data storage are not what QuestDB is typically brought in for.
What can Amazon RDS do that QuestDB cannot?
Amazon RDS covers Multiple DB Engines, Automated Backups, Multi-AZ Deployment, Read Replicas. QuestDB covers High Throughput Ingestion, SQL Support, Time-series Optimization, SIMD Vectorization. Both handle PostgreSQL, Web support.

Answered from the vendors’ own pages

Amazon RDS: What databases does Amazon RDS support?

Amazon RDS supports Amazon Aurora, PostgreSQL, MySQL, MariaDB, Oracle Database, and Microsoft SQL Server as managed database engines.

Source
Amazon RDS: Does Amazon RDS handle backups automatically?

Yes. Amazon RDS automates backup configuration, backing up your database and transaction logs. Blue/Green Deployments allow safer updates by mirroring production in staging before applying changes.

Source
Amazon RDS: How does Amazon RDS Proxy improve performance?

Amazon RDS Proxy is a managed database proxy that makes applications more scalable by reducing database connection overhead, more resilient to database failures, and more secure through built-in authentication.

Source
Amazon RDS: Does Amazon RDS provide read replicas?

Yes. Amazon RDS supports read replicas across availability zones and regions, enabling horizontal scaling of read capacity while maintaining a single write primary.

Source
Amazon RDS: Can I access the host directly via SSH or Remote Desktop?

No. Amazon RDS does not allow direct host access via SSH, Telnet, or Windows Remote Desktop Connection. Database access is limited to database clients and management console.

Source
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