r3vsr4
Size for size, r3 and r4 cost about the same on demand in US East (N. Virginia), across 5 shared sizes. Same size, one generation apart.
On-demand prices by size in US East (N. Virginia)
USD per hour for PostgreSQL, Single-AZ. Pick a size to compare the two types.
| Size | r3 | r4 | r4 vs r3 |
|---|---|---|---|
| large | db.r3.large $0.25 | db.r4.large $0.25 | Same |
| xlarge | db.r3.xlarge $0.5 | db.r4.xlarge $0.5 | Same |
| 2xlarge | db.r3.2xlarge $0.995 | db.r4.2xlarge $1.00 | ▲ 1% |
| 4xlarge | db.r3.4xlarge $1.99 | db.r4.4xlarge $2.00 | ▲ 1% |
| 8xlarge | db.r3.8xlarge $3.98 | db.r4.8xlarge $4.00 | ▲ 1% |
Key differences
The biggest lead each family has.
Where r3 leads
On-demand priceCheaper in 3 of 5 shared sizes
CheaperWhere r4 leads
Sizes6 sizes here vs 5
1 moreLargest size64 vCPUs vs 32
BiggerKeep exploring
Each family's own page, and how it compares with others.