Technology · head to head
Safari vs Redis
Safari
Technology
Apple's WebKit browser, available only on Apple operating systems and updated only with them.
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Safari it runs only on Apple operating systems; there has been no Windows build since 2012 and none for Linux or Android, so any team that must verify Safari behaviour has to buy Mac hardware or rent it from a device cloud, which is a line item Chrome and Firefox do not create.; Redis licensing changed from BSD to AGPL in 2025, impacting open-source usage
- They diverge on capability: Safari covers WebKit engine, Redis covers In-memory data store.
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which Safari and Redis actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Technology).
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 Safari
- WebKit engine
- Intelligent Tracking Prevention
- Energy optimisation
- iCloud Private Relay
- Passkeys in iCloud Keychain
- Handoff and tab sync
- Profiles and Tab Groups
- Web Inspector
Only in Redis
- In-memory data store
- Data structures
- Pub/Sub messaging
- Lua scripting
- Transactions
- Persistence options
- Replication
- Clustering
What people use each for
The jobs each tool is most often brought in to do.
Safari
- Getting the longest battery life out of a MacBook, where the difference against Chromium browsers is hours rather than minutesnot Redis
- Debugging a site on a real iPhone or iPad, which requires Safari's Web Inspector connected over USB from a Macnot Redis
- An all-Apple household or team that wants tabs, passwords and passkeys to follow them across devices without a third-party accountnot Redis
- Privacy-conscious users on iCloud+ who want tracking protection and Private Relay working by default rather than through extensionsnot Redis
Redis
- Cachingnot Safari
- Session managementnot Safari
- Real-time analyticsnot Safari
- Message queuingnot Safari
- Leaderboardsnot Safari
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Safari
- It runs only on Apple operating systems; there has been no Windows build since 2012 and none for Linux or Android, so any team that must verify Safari behaviour has to buy Mac hardware or rent it from a device cloud, which is a line item Chrome and Firefox do not create.
- Safari's version is bound to the operating system's version, so a Mac that has fallen off the supported macOS list stops receiving Safari updates altogether; the browser's security life is the machine's OS life, roughly three years of updates after the last major release it can run.
- Distributing an extension means packaging it inside a signed macOS application and shipping it through the App Store with a paid Apple Developer Program membership, which makes a small internal or single-team extension impractical.
- Automated testing uses safaridriver, which runs on macOS only, has no headless mode and permits one session per machine, so Safari coverage in CI means real Macs in the pipeline rather than containers, and it does not parallelise the way Chromium does.
- Web platform features generally land in WebKit later than in Blink and Gecko, so Safari's current support is in practice the compatibility floor for any project, and a feature you can use everywhere else may be a year away here.
- Enterprise management is thin: configuration profiles cover a modest set of settings with nothing comparable to the several hundred administrative policies Chrome and Edge expose, so a managed fleet cannot control Safari to the same degree.
Redis
- Licensing changed from BSD to AGPL in 2025, impacting open-source usage
- All data must fit in memory, limiting scalability to available RAM
- No built-in support for multi-tenancy
- Limited transaction support compared to traditional databases
Pricing, plan by plan
Safari
FreeNo published plan breakdown. See the Safari review.
Redis
FreeNo published plan breakdown. See the Redis review.
Which should you pick?
Choose Safari if
- You need webkit engine.
- You want to start without paying.
- You also want intelligent tracking prevention.
Choose Redis if
- You need in-memory data store.
- You want to start without paying.
- You work on Linux, macOS, Windows.
- You also want data structures.
Questions people ask
- Is Safari or Redis better?
- Neither clearly leads. Safari starts at Free and Redis at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Safari or Redis?
- Safari starts at Free and Redis at Free.
- Does Safari or Redis run on more platforms?
- Safari runs on Web. Redis runs on Linux, macOS, Windows.
- Can I use Safari for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Safari best used for?
- Safari is most often used for getting the longest battery life out of a macbook, where the difference against chromium browsers is hours rather than minutes, debugging a site on a real iphone or ipad, which requires safari's web inspector connected over usb from a mac, an all-apple household or team that wants tabs, passwords and passkeys to follow them across devices without a third-party account, privacy-conscious users on icloud+ who want tracking protection and private relay working by default rather than through extensions. Of those, getting the longest battery life out of a macbook, where the difference against chromium browsers is hours rather than minutes and debugging a site on a real iphone or ipad, which requires safari's web inspector connected over usb from a mac are not what Redis is typically brought in for.
- What can Safari do that Redis cannot?
- Safari covers WebKit engine, Intelligent Tracking Prevention, Energy optimisation, iCloud Private Relay. Redis covers In-memory data store, Data structures, Pub/Sub messaging, Lua scripting.
Answered from the vendors’ own pages
Safari: Can I run Safari on Windows or Linux?
No. The last Windows version was Safari 5.1.7 in 2012 and it is long unsupported. There has never been a Linux build. Testing Safari requires macOS, either your own or a rented cloud device.
Redis: Is Redis open source?
Redis was open source under the BSD license since its inception in 2009 and has remained open source. However, in 2024-2025, Redis Labs changed licensing to source-available and AGPL, prompting the creation of Valkey, a BSD-licensed open-source fork.
SourceSafari: How do I test my site in Safari without a Mac?
Through a cloud device farm such as BrowserStack, Sauce Labs or LambdaTest, which run real macOS and iOS instances. There is no reliable local emulation, because other browsers on Windows and Linux do not use WebKit.
Redis: What is Redis used for?
Redis is an in-memory data structure store used primarily as a cache, database, and message broker. It provides high-speed data access for real-time applications, sessions, leaderboards, real-time analytics, and other use cases requiring fast data retrieval.
SourceSafari: Are other iPhone browsers really different from Safari?
Historically no: Apple required all iOS browsers to use WebKit, so Chrome and Firefox on iPhone were interface shells around Safari's engine. The EU's Digital Markets Act now permits alternative engines, but adoption is limited, so in practice iOS testing still means WebKit.
Safari: Why does Safari not get a new version on my old Mac?
Safari ships with the operating system. When a Mac can no longer run a macOS version that Apple still updates, Safari stops updating too, including its security fixes.
Safari: What does it cost?
Nothing. It is included with Apple operating systems. Private Relay requires an iCloud+ subscription, and publishing an extension requires a paid Apple Developer Program membership.
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