Choosing the right database is a critical choice when building any software application. All databases have different strengths and weaknesses when it comes to performance, so deciding which database has the most benefits and the most minor downsides for your specific use case and data model is an important decision. Below you will find an overview of the key concepts, architecture, features, use cases, and pricing models of InfluxDB and Redis so you can quickly see how they compare against each other.

The primary purpose of this article is to compare how InfluxDB and Redis perform for workloads involving time series data, not for all possible use cases. Time series data typically presents a unique challenge in terms of database performance. This is due to the high volume of data being written and the query patterns to access that data. This article doesn't intend to make the case for which database is better; it simply provides an overview of each database so you can make an informed decision.

InfluxDB vs Redis Breakdown


 
Database Model

Time Series Database

In-memory database

Architecture

Cloud-native architecture available as a fully managed cloud service or self-managed on your own hardware

Redis can be deployed on-premises, in the cloud, or as a managed service

License

InfluxDB 3 Core: MIT (open source). InfluxDB 3 Enterprise: commercial license.

BSD 3

Use Cases

Monitoring, observability, IoT, real-time analytics, Industrial AI, Aerospace

Caching, message brokering, real-time analytics, session storage, geospatial data processing

Scalability

Horizontally scalable with decoupled compute and storage; object storage reduces infrastructure costs significantly

Horizontally scalable via partitioning and clustering, supports data replication

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InfluxDB Overview

InfluxDB is a time series database built for storing metrics, events, logs, and traces. InfluxData released the first version in 2013. It is the most widely deployed time series database in the world and consistently ranks #1 in the DB-Engines time series database category with a 21.60 score.

InfluxDB 3 is the most recent version of InfluxDB. Its architecture separates compute and storage, so each scales independently based on workload demands. InfluxDB 3 supports standard SQL and InfluxQL, a time-series-optimized query language with built-in functions for downsampling, windowed aggregations, and time-range filtering.

InfluxDB 3 is available in five deployment options:

  • InfluxDB 3 Core: Open source, self-managed, MIT licensed.
  • InfluxDB 3 Enterprise: Self-managed with enterprise capabilities including clustering, role-based access control, and automated backup and restore.
  • InfluxDB Cloud Serverless: Fully managed, usage-based pricing, available across major cloud providers.
  • InfluxDB Cloud Dedicated: Managed cloud on dedicated infrastructure for workloads requiring isolation or hardware-level configuration.
  • Amazon Timestream for InfluxDB: InfluxDB fully managed by AWS, natively integrated

Redis Overview

Redis, which stands for Remote Dictionary Server, is an open-source, in-memory data structure store that can be used as a database, cache, and message broker. It was created by Salvatore Sanfilippo in 2009 and has since gained significant popularity due to its high performance and flexibility. Redis supports various data structures, such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, and geospatial indexes with radius queries.


InfluxDB for Time Series Data

InfluxDB is the right choice when the workload is time series by nature: data arrives continuously, records are rarely modified after they are written, queries span time ranges, and volume grows with the number of sources rather than user activity.

InfluxDB is purpose-built for these workloads:

  • Infrastructure and application observability: server metrics, container telemetry, Kubernetes monitoring
  • Machine learning and AI: High-frequency feature data, model performance metrics, and inference telemetry at the latency and scale ML pipelines require
  • IoT and industrial sensor data: high-frequency writes from large device fleets
  • Energy systems: smart meters, battery storage telemetry, renewable asset monitoring
  • Network telemetry: gNMI streaming, SNMP at scale, NetFlow records
  • Satellite and aerospace: High-frequency telemetry from satellites, launch vehicles, and ground systems where data volume is extreme and decisions are time-sensitive
  • Financial time series: tick data, price feeds, OHLCV aggregations

At high data volumes, InfluxDB’s columnar storage and object storage backend compress time series data aggressively and store it at a fraction of the cost of in-memory or block storage.

Redis for Time Series Data

Redis has a dedicated module for working with time series data called RedisTimeSeries. RedisTimeSeries offers functionality like downsampling, data retention policies, and specialized queries for time series data in Redis. Being an in-memory database, Redis will be very fast for reading and writing time series data, but due to the cost of RAM compared to disk using Redis could become expensive depending on the size of your dataset. If your use case doesn’t require extremely fast response times, you could save money by going with a more traditional time series database.


InfluxDB Key Concepts

  • Columnar storage: InfluxDB stores data in a column-oriented format using both open source and proprietary standards for persistent storage and Apache Arrow as the in-memory representation. Columnar storage produces strong compression ratios and fast time-range reads.

  • Data model: InfluxDB organizes data into databases, measurements (equivalent to tables), tags (indexed identifiers used for filtering), and fields (the measured values). InfluxDB 3 supports unlimited tables and columns. Data models evolve without schema migrations or predefined column limits.

  • Query languages: InfluxDB supports standard SQL and InfluxQL. InfluxQL includes built-in time-series functions: gap filling, window aggregations, downsampling, and rate calculations from counter data.

  • Decoupled architecture: InfluxDB 3 separates ingestion, query compute, and storage into independently scalable components. Teams tune each layer to workload requirements rather than provisioning for peak across all three simultaneously.

  • Retention policies: Users configure retention policies that automatically expire data after a defined duration. No manual partition drops, retention scripts, or index rebuilds required.

  • Telegraf integration: Telegraf, InfluxData’s open-source data collection agent, connects to 400+ data sources out of the box and writes directly to InfluxDB. It is part of the standard telemetry collection stack for tens of thousands of teams worldwide.

  • Unlimited Cardinality: The InfluxDB 3 storage engine enables high-performance queries across tables with millions of columns without impacting query performance.

Redis Key Concepts

  • In-memory store: Redis stores data in memory, which allows for faster data access and manipulation compared to disk-based databases .
  • Data structures: Redis supports a wide range of data structures, including strings, hashes, lists, sets, and more, which provide flexibility in how data is modeled and stored.
  • Persistence: Redis offers optional data persistence, allowing data to be periodically saved to disk or written to a log for durability.
  • Pub/Sub: Redis provides a publish/subscribe messaging system, enabling real-time communication between clients without the need for a centralized message broker.

InfluxDB Architecture

InfluxDB 3 separates data ingestion, querying, compaction, and garbage collection into components that operate independently. This separation allows compute and storage to scale in different directions based on actual workload requirements.

Data written to InfluxDB flows through ingesters with millisecond-level latency and is immediately queryable. A background compactor consolidates new files and moves them to object storage. The query layer pulls seamlessly from both in-flight ingester data and object storage, so there is no gap between data arrival and query availability.

Object storage handles long-term persistence at low cost. Teams retain data at higher frequencies and for longer periods without driving up infrastructure costs on expensive storage tiers.

Redis Architecture

Redis is a NoSQL database that uses a key-value data model, where each key is associated with a value stored as one of Redis’ supported data structures. The database is single-threaded, which simplifies its internal architecture and reduces contention. Redis can be deployed as a standalone server, a cluster, or a master-replica setup for scalability and high availability. The Redis Cluster mode automatically shards data across multiple nodes, providing data partitioning and fault tolerance.

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InfluxDB Features

High-performance storage and querying

InfluxDB 3 is optimized for time series at every layer: ingestion, storage, and query execution. InfluxDB 3.10 delivers significantly faster query performance compared to prior InfluxDB 3 releases, with the most pronounced gains on single-series lookups, real-time telemetry queries, and metadata operations. Performance varies by workload.

Retention policies

InfluxDB automatically expires data after a configured duration. No external orchestration required.

Data compression

InfluxDB 3’s storage engine delivers strong compression ratios on time series data. Background compaction continuously consolidates smaller files into larger ones that are cheaper to store and faster to query.

Horizontal scaling and clustering

InfluxDB 3 Enterprise supports horizontal scaling and clustering, distributing data and query load across nodes for performance and fault tolerance.

Data tiering

InfluxDB 3 automatically moves data between hot and cold storage tiers. Recent data stays accessible for low-latency queries. Older data moves to object storage, where it remains queryable at lower cost without manual lifecycle management.

Row-level deletions

Users delete individual data points or subsets within a table without dropping entire tables or databases.

Auto-Distinct Value Caching

InfluxDB 3.10 automatically creates caches for metadata queries, making operations like SHOW TAG VALUES significantly faster without manual cache configuration.

Processing Engine

InfluxDB 3 runs Python code directly inside the database for real-time transformations, anomaly detection, and forecasting. Plugins trigger on a schedule, via HTTP requests, or on data write with no external processing layer required.

Redis Features

Atomicity

Redis supports atomic operations on complex data types, allowing developers to perform powerful operations without worrying about race conditions or other concurrent processing issues.

Broad data structure support

Redis supports a range of data structures such as lists, sets, sorted sets, hashes, bitmaps, hyperloglog, and geospatial indexes. This flexibility allows developers to use Redis for a wide variety of tasks by using data structures that are optimized for their data in terms of performance characteristics.

Pub/Sub messaging

Redis provides a publish/subscribe messaging system for real-time communication between clients.

Lua Scripting

Developers can run Lua scripts in the Redis server, enabling complex operations to be executed atomically in the server itself, reducing network round trips.


InfluxDB Use Cases

Monitoring and alerting

InfluxDB stores and processes time series data from infrastructure, applications, and devices at scale. Combined with visualization tools like Grafana, teams build real-time dashboards and threshold-based alerting without query latency degrading as data accumulates.

Machine learning and AI

InfluxDB stores the high-frequency feature data, model performance metrics, and inference telemetry that ML pipelines depend on. The built-in Processing Engine runs anomaly detection and forecasting models directly against live data without a separate compute layer.

IoT data storage and analysis

High write throughput and configurable retention policies make InfluxDB a fit for IoT deployments where sensors generate continuous data streams. Teams ingest at high frequency, retain what matters, and query across the full dataset with consistent performance.

Energy systems

InfluxDB manages telemetry from smart meters, grid infrastructure, battery storage systems, and renewable assets at the write rates and retention windows energy operators require. Cell-level monitoring, cross-site portfolio analytics, and long-horizon capacity planning all run on the same platform without architectural workarounds.

Real-time analytics

InfluxDB handles application performance monitoring, user behavior tracking, and financial data analysis in real time. SQL and InfluxQL support lets teams run complex aggregations and time-windowed queries without a dedicated analytics layer.

Infrastructure and application monitoring

InfluxDB handles the cardinality and write throughput that infrastructure monitoring generates at scale: millions of unique tag combinations across hosts, services, containers, and endpoints. Teams query recent and historical data spanning months or years without separate storage tiers or query engines.

Satellite & Aerospace

InfluxDB stores and analyzes high-frequency telemetry from satellites, launch vehicles, and ground systems where data volume is extreme and query latency affects operational decisions. Object storage tiering keeps years of mission data accessible without runaway infrastructure costs.

Industrial AI

InfluxDB ingests continuous signals from PLCs, SCADA systems, and industrial sensors at the frequencies predictive maintenance and process optimization models require. The Processing Engine runs detection and forecasting plugins in-database, reducing latency between sensor data and actionable output.

Data historian augmentation

InfluxDB extends legacy data historians by capturing the high-resolution, high-frequency process data that traditional historians compress, downsample, or age out. Open SQL and InfluxQL access frees that data from closed historian interfaces, while object storage tiering retains full-fidelity history at a fraction of the cost of expanding the existing system. Teams bridge plant-floor signals into modern analytics or ML pipelines and run Processing Engine plugins against live and archived data, modernizing without ripping out the historian they already depend on.

Redis Use Cases

Caching

Redis is often used as a cache to store frequently accessed data and reduce the load on other databases or services, improving application performance and reducing latency.

Task queues

Redis can be used to implement task queues, which are useful for managing tasks that take longer to process and should be executed asynchronously. This is particularly common in web applications, where background tasks can be processed independently of the request/response cycle

Real-time analysis and machine learning

Redis’ high performance and low-latency data access make it suitable for real-time analysis and machine learning applications, such as processing streaming data, media streaming, and handling time-series data. This can be achieved using Redis’ data structures and capabilities like sorted sets, timestamps, and pub/sub messaging.


InfluxDB Pricing Model

InfluxDB offers several pricing options, including a free open source version, a cloud-based offering, and an enterprise edition for on-premises deployment:

  • InfluxDB 3 Core: Free, open source, self-managed. Provides core time series database functionality on the InfluxDB 3 architecture.
  • InfluxDB Cloud Serverless: Fully managed, multi-tenant cloud., pay-as-you-go. No infrastructure to manage. Available across major cloud providers.
  • InfluxDB Cloud Dedicated: Managed deployment on dedicated infrastructure for workloads requiring isolation or hardware-level configuration control.
  • InfluxDB 3 Enterprise: Self-managed enterprise deployment with clustering, role-based access control, automated backup and restore, and production support.

Redis Pricing Model

Redis is open-source software, which means it can be deployed and used freely on your own infrastructure. However, there are also managed Redis services available, such as Redis Enterprise which offer additional features, support, and ease of deployment. Pricing for these services typically depends on factors like the size of the instance, data storage, and data transfer.