Fly.io vs Auth0: which is cheaper?

Fly.io starts at $29/mo, while Auth0 starts at $35/mo in the latest snapshot.

Does Fly.io or Auth0 have a free plan?

Auth0 shows a free plan in the latest snapshot, while Fly.io does not.

Is Fly.io a good hosting alternative to Auth0?

Fly.io is tracked in hosting, while Auth0 overlaps for similar buyers. Use the changelog section below to compare shipping cadence before you choose.

How often is this Fly.io vs Auth0 comparison updated?

TrackRival refreshes pricing snapshots daily and appends new changelog entries whenever either product ships a release.

Fly.io vs Auth0

A side-by-side comparison of pricing, plans, and recent product updates. Pricing data last refreshed May 14, 2026.

Fly.io

Run user code close to users.

Visit →

Category: hosting
Plans tracked: 4
Entry price: $29/mo
Free plan?: No

See full Fly.io pricing & changelog →

Auth0

Authentication and authorization platform.

Visit →

Category: auth
Plans tracked: 4
Entry price: $35/mo
Free plan?: Yes

See full Auth0 pricing & changelog →

Plan-by-plan pricing

Fly.io

Serious Support

Fly.io

$29/mo

Dedicated team of engineers
Starting price

Compliance Made Easy

Fly.io

$99/mo

HIPAA-compliant workloads
BAAs
SOC2s

Pay-as-You-Go Infrastructure

Fly.io

Micro VMs
Persistent storage
Usage-based billing

Enterprise-Ready

Fly.io

Custom

Larger workloads
Custom resource configurations
SLA requirements
Emergency support

Auth0

Free

Auth0

Free

Up to 25,000 monthly active users
1 Custom Domain*
Secure Agentic AI workflows
Passwordless Authentication
Unlimited Social Connections**
+ 1 more

Essentials

Auth0

$35/mo

Up to 500 monthly active users
Everything in Free, plus...
Higher Auth, API limits, and Feature limits
Pro Multi-Factor Authentication
Role-based Access Control Per Organization
+ 1 more

Professional

Auth0

$240/mo

Up to 500 monthly active users
Everything in Essentials, plus...
Use your existing User Database for Logins
Enterprise Multi-Factor Authentication
Enhanced Attack Protection
+ 1 more

Enterprise

Auth0

Custom

Everything in Professional plus...
Custom User & SSO Tiers
99.99% SLA
Enterprise Rate Limits
Enterprise Administration & Support
+ 1 more

Fly.io vs Auth0 FAQ

Fly.io vs Auth0: which is cheaper?: Fly.io starts at $29/mo, while Auth0 starts at $35/mo in the latest snapshot.
Does Fly.io or Auth0 have a free plan?: Auth0 shows a free plan in the latest snapshot, while Fly.io does not.
Is Fly.io a good hosting alternative to Auth0?: Fly.io is tracked in hosting, while Auth0 overlaps for similar buyers. Use the changelog section below to compare shipping cadence before you choose.
How often is this Fly.io vs Auth0 comparison updated?: TrackRival refreshes pricing snapshots daily and appends new changelog entries whenever either product ships a release.

Which should you pick?

Both Fly.io and Auth0 serve overlapping audiences (Fly.io in hosting, Auth0 in auth).

Choose Fly.io if you value: run user code close to users.
Choose Auth0 if you value: authentication and authorization platform.
Subscribe to TrackRival if you want to be notified whenever either of them changes pricing or ships a major update — so you can react before your competitors do.

Related comparisons

Fly.io vs Auth0

A side-by-side comparison of pricing, plans, and recent product updates. Pricing data last refreshed May 14, 2026.

Fly.io

Run user code close to users.

Visit →

Category: hosting
Plans tracked: 4
Entry price: $29/mo
Free plan?: No

See full Fly.io pricing & changelog →

Auth0

Authentication and authorization platform.

Visit →

Category: auth
Plans tracked: 4
Entry price: $35/mo
Free plan?: Yes

See full Auth0 pricing & changelog →

Plan-by-plan pricing

Fly.io

Serious Support

Fly.io

$29/mo

Dedicated team of engineers
Starting price

Compliance Made Easy

Fly.io

$99/mo

HIPAA-compliant workloads
BAAs
SOC2s

Pay-as-You-Go Infrastructure

Fly.io

Micro VMs
Persistent storage
Usage-based billing

Enterprise-Ready

Fly.io

Custom

Larger workloads
Custom resource configurations
SLA requirements
Emergency support

Auth0

Free

Auth0

Free

Up to 25,000 monthly active users
1 Custom Domain*
Secure Agentic AI workflows
Passwordless Authentication
Unlimited Social Connections**
+ 1 more

Essentials

Auth0

$35/mo

Up to 500 monthly active users
Everything in Free, plus...
Higher Auth, API limits, and Feature limits
Pro Multi-Factor Authentication
Role-based Access Control Per Organization
+ 1 more

Professional

Auth0

$240/mo

Up to 500 monthly active users
Everything in Essentials, plus...
Use your existing User Database for Logins
Enterprise Multi-Factor Authentication
Enhanced Attack Protection
+ 1 more

Enterprise

Auth0

Custom

Everything in Professional plus...
Custom User & SSO Tiers
99.99% SLA
Enterprise Rate Limits
Enterprise Administration & Support
+ 1 more

Fly.io vs Auth0 FAQ

Fly.io vs Auth0: which is cheaper?: Fly.io starts at $29/mo, while Auth0 starts at $35/mo in the latest snapshot.
Does Fly.io or Auth0 have a free plan?: Auth0 shows a free plan in the latest snapshot, while Fly.io does not.
Is Fly.io a good hosting alternative to Auth0?: Fly.io is tracked in hosting, while Auth0 overlaps for similar buyers. Use the changelog section below to compare shipping cadence before you choose.
How often is this Fly.io vs Auth0 comparison updated?: TrackRival refreshes pricing snapshots daily and appends new changelog entries whenever either product ships a release.

Which should you pick?

Both Fly.io and Auth0 serve overlapping audiences (Fly.io in hosting, Auth0 in auth).

Choose Fly.io if you value: run user code close to users.
Choose Auth0 if you value: authentication and authorization platform.
Subscribe to TrackRival if you want to be notified whenever either of them changes pricing or ships a major update — so you can react before your competitors do.