Is Fly.io or Redis better?

Neither clearly leads. Fly.io starts at $29/month and Redis at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Fly.io or Redis?

Redis has a free tier; the other does not. Paid plans start at $29/month for Fly.io and Free for Redis.

Does Fly.io or Redis run on more platforms?

Fly.io runs on Web, Api, Docker. Redis runs on Linux, macOS, Windows.

Can I use Redis for free?

Yes. Redis has a free tier, so you can try it without paying. Fly.io starts at $29/month.

What is Fly.io best used for?

Fly.io is most often used for deploying containerised applications close to users across regions, running full stack apps and databases on managed machines. Of those, deploying containerised applications close to users across regions and running full stack apps and databases on managed machines are not what Redis is typically brought in for.

What can Fly.io do that Redis cannot?

Fly.io covers Global deployment, Docker support, Postgres databases, Redis support. Redis covers In-memory data store, Data structures, Pub/Sub messaging, Lua scripting.

Cloud · head to head

Fly.io vs Redis

Fly.io

Cloud

Deploy web applications globally

From: $29/month
Rated: -

Full review Website

Redis

Technology

The real-time data platform

From: Free
Rated: -

Full review Website

The short version

Only Redis has a free tier, so it costs nothing to try first.
Each has a real cost: Fly.io egress is priced by destination region, from $0.02 per GB in North America and Europe to $0.12 per GB for Africa and India, so the same traffic costs six times more depending on where users are; Redis licensing changed from BSD to AGPL in 2025, impacting open-source usage
They diverge on capability: Fly.io covers Global deployment, Redis covers In-memory data store.

Where they differ

Only the attributes on which Fly.io and Redis actually diverge.

Attributes where Fly.io and Redis differ
Attribute	Fly.io	Redis
Starting price	$29/month	Free
Pricing model	usage-based	Unknown
Free tier	No	Yes
Platforms	Web, Api, Docker	Linux, macOS, Windows
Category	Cloud	Technology
Founded	2020	2009

Identical on both: 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 Fly.io

Global deployment
Docker support
Postgres databases
Redis support
Auto-scaling
Health checks
Backups
Monitoring

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.

Fly.io

Deploying containerised applications close to users across regionsnot Redis
Running full stack apps and databases on managed machinesnot Redis

Redis

Cachingnot Fly.io
Session managementnot Fly.io
Real-time analyticsnot Fly.io
Message queuingnot Fly.io
Leaderboardsnot Fly.io

Where each one falls short

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

Fly.io

Egress is priced by destination region, from $0.02 per GB in North America and Europe to $0.12 per GB for Africa and India, so the same traffic costs six times more depending on where users are
Stopped machines still bill at $0.15 per GB of root filesystem a month, so a paused service is not a free one
Volumes are billed on provisioned capacity rather than usage, at $0.15 per GB a month
Reservation discounts of 40% require paying a year up front, from $36 to $1,440
Fly Kubernetes is a separate $75 a month per cluster
Dedicated IPv4 addresses are $2 a month each

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

Fly.io

$29/month

Pay-as-You-Go$null/mo
- Micro VMs and persistent storage charged by usage
- FlyCTL CLI
- Unlimited users and organizations
Serious Support$29/month
- Access to dedicated engineering team
- All Pay-as-You-Go features
Machine Reservation Blocks$null/mo
- 40% discount on machine usage
- Requires upfront payment for savings
Compliance Package$99/month
- HIPAA compliance
- BAAs
- SOC2 documentation

Redis

Free

No published plan breakdown. See the Redis review.

Which should you pick?

Choose Fly.io if

You need global deployment.
You work on Web, Api, Docker.
You also want docker support.

Fly.io review

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.

Redis review

Questions people ask

Is Fly.io or Redis better?: Neither clearly leads. Fly.io starts at $29/month and Redis at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fly.io or Redis?: Redis has a free tier; the other does not. Paid plans start at $29/month for Fly.io and Free for Redis.
Does Fly.io or Redis run on more platforms?: Fly.io runs on Web, Api, Docker. Redis runs on Linux, macOS, Windows.
Can I use Redis for free?: Yes. Redis has a free tier, so you can try it without paying. Fly.io starts at $29/month.
What is Fly.io best used for?: Fly.io is most often used for deploying containerised applications close to users across regions, running full stack apps and databases on managed machines. Of those, deploying containerised applications close to users across regions and running full stack apps and databases on managed machines are not what Redis is typically brought in for.
What can Fly.io do that Redis cannot?: Fly.io covers Global deployment, Docker support, Postgres databases, Redis support. Redis covers In-memory data store, Data structures, Pub/Sub messaging, Lua scripting.

Answered from the vendors’ own pages

Fly.io: Is there a free tier for Fly.io?

Fly.io does not advertise a free tier. The base plan is pay-as-you-go with usage-based pricing for Micro VMs and persistent storage. All users get FlyCTL CLI, unlimited organizations, private networking, SSO, ACLs, and scoped tokens.

Source

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.

Source

Fly.io: How much does Fly.io Serious Support cost?

Serious Support costs 29 USD per month and provides access to a dedicated engineering team while maintaining all pay-as-you-go features for Micro VMs and storage.

Source

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.

Source

Fly.io: What does Fly.io Compliance Package include?

The Compliance Package is 99 USD per month and includes HIPAA compliance, BAAs, and SOC2 documentation for organizations requiring compliance certifications.

Source

Fly.io: Does Fly.io offer discounts for upfront commitment?

Yes, Fly.io offers Machine Reservation Blocks with 40% discount on machine usage. This requires upfront payment but applies savings on infrastructure costs.

Source

Fly.io vs Redis

Fly.io

Redis

The short version

Where they differ

What each one covers

Only in Fly.io

Only in Redis

What people use each for

Fly.io

Redis

Where each one falls short

Fly.io

Redis

Pricing, plan by plan

Fly.io

Redis

Which should you pick?

Choose Fly.io if

Choose Redis if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Fly.io

More on Redis

Keep looking

Other head to heads