Is Memcached or QuestDB better?

Neither clearly leads. Memcached starts at Free and QuestDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Memcached or QuestDB?

Memcached starts at Free and QuestDB at Free.

Does Memcached or QuestDB run on more platforms?

Memcached runs on Linux, macOS, Windows, Docker, Self-hosted. QuestDB runs on Docker, Kubernetes, Cloud (AWS, Azure, GCP).

Can I use Memcached for free?

Both have a free tier, so you can try either at no cost before committing.

What is Memcached best used for?

Memcached is most often used for caching expensive database query results to cut load, session storage where losing sessions on restart is acceptable, fronting an api whose responses are costly and change slowly. Of those, caching expensive database query results to cut load and session storage where losing sessions on restart is acceptable are not what QuestDB is typically brought in for.

What can Memcached do that QuestDB cannot?

Memcached covers In-memory key-value cache, Multithreaded, Client-side sharding, Predictable memory use. QuestDB covers High Throughput Ingestion, SQL Support, Time-series Optimization, SIMD Vectorization.

Databases · head to head

Memcached vs QuestDB

Memcached

Databases

Distributed memory object caching system

From: Free
Rated: -

Full review Website

QuestDB

Databases

Fast open source time-series database for high throughput ingestion

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Memcached no persistence at all: restart a node and its cache is gone, which every design must assume; QuestDB open-source edition lacks high-availability, distributed architecture, and enterprise security features
They diverge on capability: Memcached covers In-memory key-value cache, QuestDB covers High Throughput Ingestion.
Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Memcached and QuestDB actually diverge.

Attributes where Memcached and QuestDB differ
Attribute	Memcached	QuestDB
Pricing model	Open source, no licence fee; managed cloud billed separately	open-source
Platforms	Linux, macOS, Windows, Docker, Self-hosted	Docker, Kubernetes, Cloud (AWS, Azure, GCP)
Founded	Unknown	2014

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Databases).

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 Memcached

In-memory key-value cache
Multithreaded
Client-side sharding
Predictable memory use

Only in QuestDB

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

What people use each for

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

Memcached

Caching expensive database query results to cut loadnot QuestDB
Session storage where losing sessions on restart is acceptablenot QuestDB
Fronting an API whose responses are costly and change slowlynot QuestDB

QuestDB

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

Where each one falls short

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

Memcached

No persistence at all: restart a node and its cache is gone, which every design must assume
No replication or failover, so losing a node loses that share of the cache
Only simple key-value, with none of the lists, sorted sets or streams Redis offers
Values are capped at 1MB by default, which surprises teams caching large documents

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

Memcached

Free

MemcachedFree
- Full functionality
- Self-hosted
- No usage limits

QuestDB

Free

No published plan breakdown. See the QuestDB review.

Which should you pick?

Choose Memcached if

You need in-memory key-value cache.
You want to start without paying.
You work on Linux, macOS, Windows, Docker, Self-hosted.
You also want multithreaded.

Memcached 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 Memcached or QuestDB better?: Neither clearly leads. Memcached starts at Free and QuestDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Memcached or QuestDB?: Memcached starts at Free and QuestDB at Free.
Does Memcached or QuestDB run on more platforms?: Memcached runs on Linux, macOS, Windows, Docker, Self-hosted. QuestDB runs on Docker, Kubernetes, Cloud (AWS, Azure, GCP).
Can I use Memcached for free?: Both have a free tier, so you can try either at no cost before committing.
What is Memcached best used for?: Memcached is most often used for caching expensive database query results to cut load, session storage where losing sessions on restart is acceptable, fronting an api whose responses are costly and change slowly. Of those, caching expensive database query results to cut load and session storage where losing sessions on restart is acceptable are not what QuestDB is typically brought in for.
What can Memcached do that QuestDB cannot?: Memcached covers In-memory key-value cache, Multithreaded, Client-side sharding, Predictable memory use. QuestDB covers High Throughput Ingestion, SQL Support, Time-series Optimization, SIMD Vectorization.

Answered from the vendors’ own pages

Memcached: Is Memcached free?

Yes, open source with no licence fee.

QuestDB: How much does QuestDB Enterprise cost?

QuestDB does not publish specific pricing for the Enterprise tier. Customers must contact QuestDB via their enterprise contact form to receive a custom quote.

Source

Memcached: Memcached or Redis?

Memcached is a pure cache: simpler, multithreaded and very predictable. Redis adds persistence, replication and rich data structures, which is why it is the default choice unless you specifically want a cache and nothing more.

QuestDB: Does QuestDB offer a free version?

Yes, QuestDB Open Source is completely free and recommended for evaluation, prototyping, and pilot projects. Enterprise features, high availability, security, and dedicated support require the paid Enterprise tier.

Source

Memcached: Does Memcached persist data?

No. Everything is in memory and lost on restart, by design.

QuestDB: What deployment options does QuestDB offer?

QuestDB offers open source deployment, Enterprise deployment, and Bring Your Own Cloud (BYOC) deployment. Pricing details for BYOC and Enterprise tiers are not published and require direct contact with sales.

Source

Memcached vs QuestDB

Memcached

QuestDB

The short version

Where they differ

What each one covers

Only in Memcached

Only in QuestDB

What people use each for

Memcached

QuestDB

Where each one falls short

Memcached

QuestDB

Pricing, plan by plan

Memcached

QuestDB

Which should you pick?

Choose Memcached if

Choose QuestDB if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Memcached

More on QuestDB

Keep looking

Other head to heads