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Home/Compare/Fly.io vs Postmark

Fly.io vs Postmark

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.

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Category
hosting
Plans tracked
4
Entry price
$29/mo
Free plan?
No
See full Fly.io pricing & changelog →

Postmark

Reliable transactional email.

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Category
email
Plans tracked
4
Entry price
$15/mo
Free plan?
Yes
See full Postmark 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

Postmark

Free

Postmark

Free
  • Test your integration with 100 emails/month
  • No overages allowed in this plan
  • Perfect for testing and side projects with low volume
  • Up to 10 custom sending domains
  • Up to 10 servers
  • + 1 more

Basic

Postmark

$15/mo
  • Extra emails @ $1.80 / 1,000
  • Industry-leading deliverability rates & speed
  • 45-day data retention
  • 5 Custom sending domains
  • Unlimited emails/day
  • + 1 more

Pro

Postmark

$16.5/mo
  • Extra emails @ $1.30 / 1,000
  • Customizable data retention up to 365 days (45-day default)
  • 10 Custom sending domains
  • Inbound email processing
  • Unlimited emails/day
  • + 1 more

Platform

Postmark

$18/mo
  • Extra emails @ $1.20 / 1,000
  • Customizable data retention up to 365 days (45-day default)
  • Unlimited Custom sending domains
  • Inbound email processing
  • Unlimited users
  • + 1 more

Fly.io vs Postmark FAQ

Fly.io vs Postmark: which is cheaper?
Postmark starts at $15/mo, while Fly.io starts at $29/mo in the latest snapshot.
Does Fly.io or Postmark have a free plan?
Postmark shows a free plan in the latest snapshot, while Fly.io does not.
Is Fly.io a good hosting alternative to Postmark?
Fly.io is tracked in hosting, while Postmark overlaps for similar buyers. Use the changelog section below to compare shipping cadence before you choose.
How often is this Fly.io vs Postmark 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 Postmark serve overlapping audiences (Fly.io in hosting, Postmark in email).

  • Choose Fly.io if you value: run user code close to users.
  • Choose Postmark if you value: reliable transactional email.
  • 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.

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