Softwr

Software · head to head

Fly.io vs Upstash

Fly.io logo

Fly.io

Software

Deploy web applications globally

From
Free
Rated
-
Full reviewWebsite
Upstash logo

Upstash

Software

Serverless data for modern developers

From
Free
Rated
-
Full reviewWebsite

The short version

  • 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; Upstash hTTP-based REST API only, no TCP connections means higher latency than self-hosted or connection-pooled Redis
  • They diverge on capability: Fly.io covers Global deployment, Upstash covers Serverless Redis.

Where they differ

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

Attributes where Fly.io and Upstash differ
AttributeFly.ioUpstash
Pricing modelusage-basedUnknown
PlatformsWeb, Api, DockerREST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown), founded (2020).

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 Upstash

  • Serverless Redis
  • Serverless Kafka
  • QStash
  • Global Replication
  • REST API
  • Edge Functions Support
  • Rate Limiting
  • Caching

Both cover

  • Cloud deployment
  • Web support
  • Api support

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 Upstash
  • Running full stack apps and databases on managed machinesnot Upstash

Upstash

  • Cachingnot Fly.io
  • Session storagenot Fly.io
  • Real-time messagingnot Fly.io
  • Rate limitingnot Fly.io
  • Serverless backendsnot 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

Upstash

  • HTTP-based REST API only, no TCP connections means higher latency than self-hosted or connection-pooled Redis
  • Rate limiting occurs when traffic exceeds configured budget cap or request limits
  • Kafka service discontinued in March 2025, requiring migration to Upstash Workflow or alternatives
  • Limited Redis feature support compared to self-hosted Redis or Redis Cloud
  • High-request-volume workloads can accumulate significant costs due to per-request pricing model

Pricing, plan by plan

Fly.io

Free
  • FreeFree
    • 3 shared-cpu-1x VMs
    • 3GB persistence storage
    • 160GB outbound data/month
  • Pay-as-you-goFree
    • Unlimited applications
    • Dedicated machines
    • Global deployment

Upstash

Free
  • FreeFree
    • 256 MB data
    • 500K commands per month
    • 10 GB bandwidth
  • Pay-as-you-go$0.2/per 100K commands
    • Per-request billing
    • Storage at $0.25/GB
    • Unlimited commands
  • Fixed Plan$10/month
    • 250 MB Redis
    • Predictable pricing
    • Global replication available at higher tiers

Which should you pick?

Choose Fly.io if

  • You need global deployment.
  • You want to start without paying.
  • You work on Web, Api, Docker.
  • You also want docker support.
Fly.io review

Choose Upstash if

  • You need serverless redis.
  • You want to start without paying.
  • You work on REST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda.
  • You also want serverless kafka.
Upstash review

Questions people ask

Is Fly.io or Upstash better?
Neither clearly leads. Fly.io starts at Free and Upstash at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fly.io or Upstash?
Fly.io starts at Free and Upstash at Free.
Does Fly.io or Upstash run on more platforms?
Fly.io runs on Web, Api, Docker. Upstash runs on REST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda.
Can I use Fly.io for free?
Both have a free tier, so you can try either at no cost before committing.
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 Upstash is typically brought in for.
What can Fly.io do that Upstash cannot?
Fly.io covers Global deployment, Docker support, Postgres databases, Redis support. Upstash covers Serverless Redis, Serverless Kafka, QStash, Global Replication. Both handle Cloud deployment, Web support, Api support.

Answered from the vendors’ own pages

Upstash: Does Upstash have a free tier?

Yes. The free tier provides 256 MB of data and 500,000 commands per month with 10 GB of bandwidth in a single region, no credit card required.

Source
Upstash: How does Upstash work with edge platforms like Vercel and Cloudflare Workers?

Upstash uses a REST API instead of TCP connections, enabling it to work from Vercel Edge, Cloudflare Workers, and AWS Lambda without persistent connections or connection pooling.

Source
Upstash: What programming languages are supported?

Upstash provides native SDKs for Python, Node.js, Go, and Rust. Java, C#, and PHP developers can use the REST API or community libraries.

Source
Upstash: Is Upstash Kafka still available?

No. Upstash Kafka was deprecated on September 11, 2024 and fully discontinued on March 11, 2025. Upstash Workflow is now recommended for durable serverless messaging and task queuing.

Source
Upstash: How is Upstash pricing structured?

Upstash uses per-request pricing at $0.20 per 100K commands for Redis, $0.25/GB for storage, and $0.40 per 100K requests for Vector database. Idle applications cost nothing.

Source
Upstash: Can Upstash be used with AWS Lambda?

Yes. Upstash works with AWS Lambda via its REST API, eliminating the need for connection pooling and making it ideal for stateless serverless functions.

Source
ShareXLinkedInRedditWhatsAppEmail

Related pages

More on Fly.io

More on Upstash

Keep looking

Other head to heads