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Databases · head to head

Memcached vs YugabyteDB

M

Memcached

Databases

Distributed memory object caching system

From
Free
Rated
-
Full reviewWebsite
YugabyteDB logo

YugabyteDB

Databases

Open source distributed SQL database for cloud native apps

From
Free
Rated
-
Full reviewWebsite

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; YugabyteDB missing PostgreSQL functions and extensions despite claiming compatibility
  • They diverge on capability: Memcached covers In-memory key-value cache, YugabyteDB covers PostgreSQL Compatible.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Memcached and YugabyteDB actually diverge.

Attributes where Memcached and YugabyteDB differ
AttributeMemcachedYugabyteDB
Pricing modelOpen source, no licence fee; managed cloud billed separatelyUnknown
PlatformsLinux, macOS, Windows, Docker, Self-hostedCloud, On-premises, Kubernetes
FoundedUnknown2016

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 YugabyteDB

  • PostgreSQL Compatible
  • Distributed SQL
  • Geo-distribution
  • Linear Scalability
  • High Availability
  • ACID Transactions
  • CDC Support
  • 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 YugabyteDB
  • Session storage where losing sessions on restart is acceptablenot YugabyteDB
  • Fronting an API whose responses are costly and change slowlynot YugabyteDB

YugabyteDB

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

YugabyteDB

  • Missing PostgreSQL functions and extensions despite claiming compatibility
  • Not a true PostgreSQL replacement requiring schema and query compatibility testing before migration
  • Requires careful isolation level management or risk data corruption in production
  • Lacks built-in OLAP capabilities, requiring external systems for analytics
  • Coupled compute and storage scaling reduces optimization flexibility

Pricing, plan by plan

Memcached

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

YugabyteDB

Free

No published plan breakdown. See the YugabyteDB 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 YugabyteDB if

  • You need postgresql compatible.
  • You want to start without paying.
  • You work on Cloud, On-premises, Kubernetes.
  • You also want distributed sql.
YugabyteDB review

Questions people ask

Is Memcached or YugabyteDB better?
Neither clearly leads. Memcached starts at Free and YugabyteDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Memcached or YugabyteDB?
Memcached starts at Free and YugabyteDB at Free.
Does Memcached or YugabyteDB run on more platforms?
Memcached runs on Linux, macOS, Windows, Docker, Self-hosted. YugabyteDB runs on Cloud, On-premises, Kubernetes.
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 YugabyteDB is typically brought in for.
What can Memcached do that YugabyteDB cannot?
Memcached covers In-memory key-value cache, Multithreaded, Client-side sharding, Predictable memory use. YugabyteDB covers PostgreSQL Compatible, Distributed SQL, Geo-distribution, Linear Scalability.

Answered from the vendors’ own pages

Memcached: Is Memcached free?

Yes, open source with no licence fee.

YugabyteDB: Is YugabyteDB a true drop-in replacement for PostgreSQL?

No, YugabyteDB is PostgreSQL-compatible but not a zero-change drop-in replacement. It requires compatibility testing with queries, stored procedures, and ORM configurations before migration.

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.

YugabyteDB: What isolation levels does YugabyteDB support?

YugabyteDB allows per-query selection between serializable isolation for critical operations and read-committed for analytics. However, this flexibility requires careful management to avoid accidental data corruption.

Source
Memcached: Does Memcached persist data?

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

YugabyteDB: Does YugabyteDB support both SQL and NoSQL workloads?

Yes, YugabyteDB offers YSQL for PostgreSQL-compatible SQL and YCQL for Cassandra-like NoSQL workloads, using the same DocDB storage engine to support both simultaneously.

Source
YugabyteDB: Can YugabyteDB scale compute and storage independently?

No, YugabyteDB couples compute and storage scaling, unlike TiDB which separates them. This means scaling decisions are less flexible and optimization is more complex.

Source
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