Firebase vs Redis
Firebase is Google's backend-as-a-service platform, holding an application's primary NoSQL data (Firestore or Realtime Database) alongside authentication, hosting and serverless functions. Redis is an in-memory data structure store known for very low-latency reads and writes, most often used as a cache, session store or message broker sitting alongside a primary database rather than replacing one. Most applications use them together rather than choosing one over the other: Firebase (or another database) for durable primary data, Redis for speed-critical caching and ephemeral state.
Facts checked on against the official sources listed at the end. Usage numbers update daily.
Best for
Holding an application's primary NoSQL data plus auth, hosting and functions
Free plan. Paid from Blaze plan is pay-as-you-go on top of the same free limits, billed through Google Cloud.
Best for
Low-latency caching, session storage and pub/sub messaging alongside a primary database
Free plan. Paid from about $0.007 an hour, with a $5 a month minimum, for the Essentials plan.
Firebase vs Redis at a glance
| Compared on | Firebase | Redis |
|---|---|---|
| Primary use case | Primary application database plus backend services | Cache, session store and message broker |
| Data persistence | Fully durable, disk-backed document storage | In-memory by default; can be configured for persistence but optimized for speed over durability |
| Built-in auth and hosting | Yes, included as part of the platform | No; Redis has no auth or hosting layer |
| Typical latency | Millisecond-range, suited to durable document queries | Sub-millisecond reads and writes for in-memory data |
| Realtime sync | Built-in realtime listeners on Firestore and Realtime Database | Pub/sub channels for custom-built realtime messaging |
| Free tier details | Yes, the Spark plan with fixed no-cost limits | Yes, Redis Cloud's free tier includes 30 MB storage |
| Open source | No, Proprietary | No, Dual source-available license (not a traditional open source license as of the 2024 change) |
| Free plan | Yes: the Spark plan, with no-cost usage limits and no payment method required | Yes: Redis Cloud's free tier includes up to 30 MB of storage on a shared deployment |
| Paid plans from | Blaze plan is pay-as-you-go on top of the same free limits, billed through Google Cloud | about $0.007 an hour, with a $5 a month minimum, for the Essentials plan |
| Made by | Redis (company) | |
| Launched | 2012 | Not listed |
What's the difference between Firebase and Redis?
Firebase is designed to be an application's system of record for NoSQL
Firebase is designed to be an application's system of record for NoSQL data, with durable storage on disk; Redis is designed for speed, typically holding transient data like cached results, sessions or queues.
Firebase includes authentication, hosting and serverless functions bundled with the database
Firebase includes authentication, hosting and serverless functions bundled with the database; Redis provides none of these and is used purely as a data structure store.
Redis's licensing changed in March 2024 to a dual source-available model, meaning
Redis's licensing changed in March 2024 to a dual source-available model, meaning current versions aren't traditionally open source; Firebase has always been a fully proprietary Google service.
Firebase's Firestore and Realtime Database offer built-in realtime listeners for syncing UI
Firebase's Firestore and Realtime Database offer built-in realtime listeners for syncing UI state; Redis's pub/sub and streams require more custom application code to build equivalent realtime features.
Firebase vs Redis pricing
Firebase's Spark plan is free with fixed usage limits; Blaze bills usage beyond those limits. Redis Cloud has a free tier limited to 30 MB and paid plans starting around $5 a month minimum for Essentials.
Firebase
Spark (free): 1 GiB Firestore storage, 50,000 daily reads, 20,000 daily writes, 10 GB hosting, auth for up to 50,000 monthly active users. Blaze: pay-as-you-go beyond those limits.
- Spark (free)
- $0
- Blaze (pay as you go)
- Usage-based, e.g. Cloud Functions $0.40 per million invocations beyond 2M free
Redis
Free: 30 MB storage on a shared deployment. Essentials from about $0.007 an hour, $5 a month minimum, covering 250 MB to 100 GB. Pro from about $0.014 an hour, $200 a month minimum, unlimited RAM.
- Free
- $0
- Essentials
- From $0.007 an hour, $5 a month minimum
- Pro
- From $0.014 an hour, $200 a month minimum (first $200 free)
Prices in USD from the official pricing pages on 30 September 2026. They change often, so confirm on firebase.google.com and redis.io before you commit.
Usage and activity
Redis has 15 times as many GitHub stars as Firebase (76.9k against 5.2k). Weekly npm downloads: 12M for firebase and 17M for redis. Releases on GitHub in the last 90 days: 5 for Firebase and 5 for Redis.
| Measure | Firebase | Redis |
|---|---|---|
| GitHub stars | 5,153 | 76,909 |
| npm downloads a week | 12M (firebase) | 17M (redis) |
| Latest release | [email protected], 1 week ago | 8.10.2, 4 weeks ago |
| Releases in 90 days | 5 | 5 |
From the public GitHub and npm APIs, updated daily. Stars and downloads show developer interest, not product quality.
Do you need Firebase, Redis or both?
Use Firebase when
- You need a durable primary database plus authentication, hosting and functions
- You're building a mobile or web app that benefits from Firestore's realtime sync
- You want a full backend platform bundled together from one provider
- You don't need sub-millisecond cache-level latency
Use Redis when
- You need very low-latency caching in front of a slower primary database
- You want a message broker or pub/sub system for real-time messaging between services
- You're storing session data or rate-limiting counters that don't need long-term durability
- You already have a primary database and want to speed up specific hot paths
Switching between Firebase and Redis
These tools are typically used together rather than as a substitute for each other. A common pattern is to keep durable data in Firebase's Firestore or Realtime Database and add Redis in front of it purely for caching frequently accessed data, storing sessions, or handling pub/sub messaging between services. There's no direct migration path from one to the other, since they solve different problems; adopting Redis alongside an existing Firebase project usually just means adding a Redis client library and caching layer to your application code.
Firebase vs Redis: common questions
Can Redis replace a primary database like Firebase's Firestore?
Generally no. Redis is optimized for speed with in-memory storage, and while it can be configured for more durability, it's not typically used as an application's system of record the way Firestore is.
Is Redis still open source?
As of a licensing change announced 20 March 2024, current versions of Redis use a dual source-available license rather than a traditional open source license. Permissively licensed forks such as Valkey emerged in response.
Do most apps use Firebase and Redis together?
Some do, especially when Firebase's built-in caching and query patterns aren't fast enough for a specific hot path; adding Redis as a caching layer alongside Firestore is a common pattern for those cases.
Does Firebase have realtime features similar to Redis pub/sub?
Firestore and Realtime Database both offer built-in realtime listeners that sync data to clients automatically, which covers many use cases Redis pub/sub would otherwise be used for, though the underlying mechanisms differ.
What's the cheapest way to try Redis?
Redis Cloud's free tier includes up to 30 MB of storage on a shared deployment, enough for testing caching patterns before committing to a paid plan.
Other options to consider
All databases tools
Supabase
Open source Postgres development platform with auth, instant APIs, realtime, storage and edge functions.
MongoDB Atlas
MongoDB's fully managed cloud database service, with a free tier and usage-based paid tiers.
Neon
Serverless Postgres platform with autoscaling and instant branching, owned by Databricks.
Pocketbase
Open source backend in a single executable file, with a database, auth and storage built in.
Sources
More sources for each tool are on the Firebase and Redis pages.
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