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InfluxDB vs Memcached

InfluxDB logo

InfluxDB

Logging

Purpose-built time series database for metrics and events

From
Free
Rated
-
Full reviewWebsite
M

Memcached

Databases

Distributed memory object caching system

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: InfluxDB high-cardinality data causes memory pressure and performance degradation; Memcached no persistence at all: restart a node and its cache is gone, which every design must assume
  • They diverge on capability: InfluxDB covers Time-series Storage, Memcached covers In-memory key-value cache.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which InfluxDB and Memcached actually diverge.

Attributes where InfluxDB and Memcached differ
AttributeInfluxDBMemcached
Pricing modelUnknownOpen source, no licence fee; managed cloud billed separately
PlatformsCloud, Docker, Linux, macOS, Windows, AWS, Google Cloud, AzureLinux, macOS, Windows, Docker, Self-hosted
CategoryLoggingDatabases
Founded2012Unknown

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

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 InfluxDB

  • Time-series Storage
  • Flux Query Language
  • High Write Throughput
  • Data Compression
  • Retention Policies
  • Continuous Queries
  • Built-in Dashboards
  • Telegraf

Only in Memcached

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

What people use each for

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

InfluxDB

  • Monitoringnot Memcached
  • IoT datanot Memcached
  • Financial datanot Memcached
  • Log analyticsnot Memcached
  • Observabilitynot Memcached

Memcached

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

Where each one falls short

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

InfluxDB

  • High-cardinality data causes memory pressure and performance degradation
  • No support for joins or transactions like relational databases
  • Queries limited to 72-hour window in InfluxDB 3 OSS Core
  • Clustering and authentication features absent from community version

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

Pricing, plan by plan

InfluxDB

Free
  • Cloud Serverless FreeFree
    • 5 MB writes per 5 minutes
    • 300 MB queries per 5 minutes
    • 30 day retention
  • Cloud Serverless Usage-Based$undefined/mo
    • 0.0025 USD per MB ingested
    • 0.012 USD per 100 queries
    • 0.002 USD per GB-hour storage

Memcached

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

Which should you pick?

Choose InfluxDB if

  • You need time-series storage.
  • You want to start without paying.
  • You work on Cloud, Docker, Linux, macOS, Windows, AWS, Google Cloud, Azure.
  • You also want flux query language.
InfluxDB review

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

Questions people ask

Is InfluxDB or Memcached better?
Neither clearly leads. InfluxDB starts at Free and Memcached at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, InfluxDB or Memcached?
InfluxDB starts at Free and Memcached at Free.
Does InfluxDB or Memcached run on more platforms?
InfluxDB runs on Cloud, Docker, Linux, macOS, Windows, AWS, Google Cloud, Azure. Memcached runs on Linux, macOS, Windows, Docker, Self-hosted.
Can I use InfluxDB for free?
Both have a free tier, so you can try either at no cost before committing.
What is InfluxDB best used for?
InfluxDB is most often used for monitoring, iot data, financial data, log analytics. Of those, monitoring and iot data are not what Memcached is typically brought in for.
What can InfluxDB do that Memcached cannot?
InfluxDB covers Time-series Storage, Flux Query Language, High Write Throughput, Data Compression. Memcached covers In-memory key-value cache, Multithreaded, Client-side sharding, Predictable memory use.

Answered from the vendors’ own pages

InfluxDB: Is there a free tier and what are the limits?

InfluxDB 3 Core OSS is free forever for local development and prototyping. Cloud Serverless free tier includes 5 MB writes per 5 minutes, 300 MB queries per 5 minutes, 30 day retention, and 2 databases.

Source
Memcached: Is Memcached free?

Yes, open source with no licence fee.

InfluxDB: Can I self-host InfluxDB?

Yes, InfluxDB 3 Core is fully open source and can be self-hosted with no license required. InfluxDB 3 Enterprise is self-managed and includes a 30-day free trial.

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.

InfluxDB: What are the series cardinality limitations?

InfluxDB is sensitive to high-cardinality data. High cardinality increases RAM usage and can trigger out-of-memory errors, making it unsuitable for some workloads with many unique tag combinations.

Source
Memcached: Does Memcached persist data?

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

InfluxDB: Does InfluxDB support SQL queries?

InfluxDB has limited SQL support. Full SQL is available in InfluxDB 3, but earlier versions support only specific SQL commands and use InfluxQL as the primary query language.

Source
InfluxDB: Can I export my data from InfluxDB?

Yes, data can be exported from InfluxDB using query results. However, the process and supported formats depend on the version and deployment type you are using.

Source
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