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AWS vs Azure Egress Cost Calculator

AWS against Microsoft Azure on your traffic: egress tiers, CloudFront vs Front Door, inter-region, cross-zone and NAT gateway charges side by side.

Updated · By Niraj Kumar · 14 sources

Providers

Where

Servers and users inServers and users in
Enter volumes inEnter volumes in

Traffic to users

GB / month

Everything your servers, storage and CDN send to users and other services on the internet.

%
No CDNAll of it

Each provider's own CDN: CloudFront, Cloud CDN, Front Door, Cloudflare or Spaces CDN.

Traffic inside the cloud

GB / month

Replication, backups and calls to services in a different region.

GB / month

Service-to-service calls, load balancing and database replicas in other zones of the same region.

NAT and servers

GB / month

Outbound calls, package and image pulls from private subnets.

Usually one per availability zone.

Sets pooled transfer allowances and Cloud NAT's per-VM fee.

Cheaper for this trafficMicrosoft AzureSaves $50.42 a month, $605 a year
AWS
$998 a month
$11,975 a year · 7th cheapest of 8
Microsoft Azure
$948 a month
$11,370 a year · 6th cheapest of 8
Cheapest cloud with servers
DigitalOcean
$0.00 a month
Every provider on this traffic, per month, North AmericaHover or focus a row for its line items.
  1. 1Cloudflarebandwidth only$0.00Cloudflare runs no servers, so region, zone and NAT traffic is priced on whatever compute sits behind it.
  2. 2DigitalOcean$0.00DigitalOcean has no managed NAT gateway to bill; servers reach the internet on their own addresses.
  3. 3Akamai Cloud (Linode)$0.00Linode has no managed NAT gateway to bill; servers reach the internet on their own addresses.
  4. 4Oracle Cloud$4.25
  5. 5Hetzner Cloud$8.51Uses 10.5 TB against a pooled allowance of 3 TB across 3 servers.
  6. 6Microsoft Azure$948
  7. 7AWS$998
  8. 8Google Cloud$1,182
Line by line, per month
ProviderInternet egressInter-regionCross-AZNAT gateway hoursNAT data processedTotal
Cloudflare–––––$0.00
DigitalOcean–––––$0.00
Akamai Cloud (Linode)–––––$0.00
Oracle Cloud$4.25––––$4.25
Hetzner Cloud$8.51––––$8.51
Microsoft Azure$882$10.00–$32.85$22.50$948
AWS$913$10.00$20.00$32.85$22.50$998
Google Cloud$1,137$10.00$10.00$3.07$22.50$1,182

How is cloud data transfer billed?

monthly = tiered(internet egress) + CDN delivery + misses × origin fetch + inter-region GB × rate + cross-AZ GB × rate + NAT gateways × hourly × 730 + NAT GB × processing rate

This page uses the same method as the Cloud Egress Cost Calculator, which explains each term and assumption in full.

Worked example

A workload in North America: 10 TB a month to the internet, 500 GB to another region, 1,000 GB across zones, 500 GB through NAT, on 3 servers.

  1. 1AWS: internet egress $913, inter-region $10.00, cross-az $20.00, nat gateway hours $32.85, nat data processed $22.50 = $998
  2. 2Microsoft Azure: internet egress $882, inter-region $10.00, nat gateway hours $32.85, nat data processed $22.50 = $948
  3. 3Difference: $50.42 a month

Microsoft Azure is $50.42 a month cheaper for this workload, $605 a year.

Frequently asked questions

Is AWS or Microsoft Azure cheaper for egress?

For internet egress from North America on 3 servers at list rates, at 1 TB a month Microsoft Azure costs $80.39 against $83.16; at 10 TB a month Microsoft Azure costs $882 against $913; and at 100 TB a month Microsoft Azure costs $7,868 against $7,978. Zone, NAT and CDN charges can change the answer, so enter your own traffic.

Where does Azure save money over AWS on data transfer?

Two places. Azure's first-tier internet egress is $0.087 per GB against AWS's $0.09, a small gap, but Azure charges nothing for traffic between availability zones, where AWS charges $0.01 each way. For a chatty multi-zone cluster that zone traffic can outweigh everything else. NAT gateways cost the same on both, $0.045 an hour and per GB.

Sources

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