AWS Global Accelerator
A networking service that routes traffic through the AWS global network to optimal endpoints, improving application availability and performance
Overview
AWS Global Accelerator is a networking service that receives traffic through Anycast IP addresses at edge locations worldwide and routes it over the AWS global backbone network to optimal regional endpoints. By bypassing the route variability and packet loss inherent in the public internet, it can reduce latency by up to 60% in some cases. It continuously performs endpoint health checks and fails over to healthy endpoints within seconds upon detecting failures, significantly enhancing the availability of multi-region architectures.
How Anycast IP and the Global Backbone Solve Network Challenges
Traffic routed over the public internet traverses multiple ISPs, causing route variability and packet loss that result in unstable latency. Global Accelerator solves this problem through the combination of Anycast IP addresses and the AWS global backbone network. Anycast IPs are received at the edge location closest to the user, and from there traffic travels over AWS-managed dedicated global network infrastructure to reach the endpoint. The segment traversing the public internet is minimized. Fixed Anycast IP addresses are assigned (two for IPv4, or two IPv4 and two IPv6 addresses for dual-stack), so endpoints can be switched without waiting for DNS TTL propagation, which is a difference from DNS-based routing.
Choosing Between CloudFront and Multi-Region Design
Global Accelerator and CloudFront both leverage the AWS edge network, but their use cases are different. CloudFront is a CDN, and the AWS FAQ page explains that it improves performance for both cacheable content (such as images and videos) and dynamic content (such as API acceleration). Global Accelerator, on the other hand, improves performance for applications over TCP or UDP, and the same page describes it as a good fit for non-HTTP use cases such as gaming (UDP), IoT (MQTT), or Voice over IP, as well as for HTTP use cases that specifically require static IP addresses or fast regional failover. In multi-region architectures, you register ALBs or NLBs from each region as endpoints in Global Accelerator endpoint groups and use traffic dials to adjust the percentage of traffic directed to each endpoint group (Region). Failover during outages is automatic based on health checks and, unlike DNS-based Route 53 failover routing, does not require waiting for DNS TTL propagation. Azure offers Azure Front Door as a similar service, but Front Door is limited to HTTP/HTTPS, whereas Global Accelerator operates at the TCP/UDP level.
Evaluating Cost-Effectiveness for Adoption Decisions
According to the official AWS pricing page, Global Accelerator pricing consists of two components: a fixed hourly fee per accelerator and a usage-based data transfer fee (DT-Premium) (as of October 2026; see that page for unit prices). The fixed fee applies until the accelerator is deleted, so for small-scale services with low traffic volumes, the cost may not be justified. Cases where adoption should be considered include services with a globally distributed user base where latency directly impacts KPIs, mission-critical systems requiring multi-region high availability, and workloads where DNS-based failover switchover times are unacceptable. Conversely, if users are concentrated in a single region or if CloudFront caching already provides sufficient latency improvement, adding Global Accelerator is unnecessary. Before adoption, you can use the AWS Global Accelerator Speed Comparison Tool to compare download speeds through Global Accelerator with direct internet downloads.
References (Official AWS Resources)
The primary sources for this page are the official AWS website and documentation. Check the official pages below for the latest specifications and pricing.
- Amazon CloudFront official page
- Amazon Route 53 official page
- Elastic Load Balancing official page
- AWS Documentation (official)
If this page and the official documentation disagree, treat the official documentation as authoritative.