c4-highmem-16-lssdvsc4a-highmem-16-lssd
c4a-highmem-16-lssd is 11% cheaper than c4-highmem-16-lssd on demand in Iowa, saving $451.29 a month. They use different processor architectures (x86_64 and arm64), so software built for one may need rebuilding to run on the other.
| At a glance | c4-highmem-16-lssd | c4a-highmem-16-lssd |
|---|---|---|
| On-demand | $5.60/hr | $4.982/hr11% less |
| Lowest rate | $2.688/hr3-yr committed use, no upfront | $2.391/hr11% less3-yr committed use, no upfront |
| Size | 16 vCPUs, 128 GiB | 16 vCPUs, 128 GiB |
| Architecture | x86_64 | arm64 |
Prices in Iowa
“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.
| Option | c4-highmem-16-lssd | c4a-highmem-16-lssd | c4a-highmem-16-lssd vs c4-highmem-16-lssd |
|---|---|---|---|
| On-demandPay by the hour | $5.60 | $4.982 | ▼ 11% |
| 1-yr committed useNo upfront | 25% off$4.20 | 25% off$3.736 | ▼ 11% |
| 3-yr committed useNo upfront | 52% off$2.688 | 52% off$2.391 | ▼ 11% |
Key differences
The biggest lead each one has.
Where c4-highmem-16-lssd leads
No clear lead on the measures we compare.
Where c4a-highmem-16-lssd leads
On-demand price$4.982 vs $5.60 per hour
11% cheaperSpecs
4 of 8 specs differ. Those are in bold.
| Compute1 of 2 differ | c4-highmem-16-lssd | c4a-highmem-16-lssd |
|---|---|---|
| vCPUs | 16 | 16 |
| Architecture | x86_64 | arm64 |
| MemoryAll 1 match | c4-highmem-16-lssd | c4a-highmem-16-lssd |
|---|---|---|
| Memory (GiB) | 128 | 128 |
| StorageAll 1 match | c4-highmem-16-lssd | c4a-highmem-16-lssd |
|---|---|---|
| Storage | Cluster storage + local SSD cache | Cluster storage + local SSD cache |
| Instance details2 of 2 differ | c4-highmem-16-lssd | c4a-highmem-16-lssd |
|---|---|---|
| Family | c4 | c4a |
| Category | C4 | C4A |
| Other1 of 2 differ | c4-highmem-16-lssd | c4a-highmem-16-lssd |
|---|---|---|
| Series | C4 | C4A |
| Specs source | AlloyDB machine type docs | AlloyDB machine type docs |
On-demand prices by region
Cheapest for c4-highmem-16-lssd first. PostgreSQL, USD per hour.
| Region | c4-highmem-16-lssd | c4a-highmem-16-lssd | Difference |
|---|---|---|---|
| Columbusus-east5 | $5.60 | $4.982 | ▼ 11% |
| IowaUsed in summaryus-central1 | $5.60 | $4.982 | ▼ 11% |
| Northern Virginiaus-east4 | $5.60 | $4.982 | ▼ 11% |
| Oregonus-west1 | $5.60 | $4.982 | ▼ 11% |
| Mumbaiasia-south1 | $5.824 | $5.181 | ▼ 11% |
| Bangkokasia-southeast3 | $5.88 | $5.231 | ▼ 11% |
| Netherlandseurope-west4 | $5.88 | $5.231 | ▼ 11% |
| Stockholmeurope-north2 | $5.88 | $5.231 | ▼ 11% |
| Mexiconorthamerica-south1 | $6.104 | $5.431 | ▼ 11% |
| Belgiumeurope-west1 | $6.16 | $5.48 | ▼ 11% |
| Finlandeurope-north1 | $6.16 | $5.48 | ▼ 11% |
| Johannesburgafrica-south1 | $6.16 | $5.48 | ▼ 11% |
| Montréalnorthamerica-northeast1 | $6.16 | $5.48 | ▼ 11% |
| Tel Avivme-west1 | $6.16 | $5.48 | ▼ 11% |
| Torontonorthamerica-northeast2 | $6.16 | $5.48 | ▼ 11% |
| Las Vegasus-west4 | $6.328 | $5.63 | ▼ 11% |
| South Carolinaus-east1 | $6.328 | $5.63 | ▼ 11% |
| Londoneurope-west2 | $6.384 | $5.68 | ▼ 11% |
| Milaneurope-west8 | $6.496 | $5.778 | ▼ 11% |
| Pariseurope-west9 | $6.496 | $5.778 | ▼ 11% |
| Taiwanasia-east1 | $6.496 | $5.778 | ▼ 11% |
| Dallasus-south1 | $6.608 | $5.879 | ▼ 11% |
| Frankfurteurope-west3 | $6.608 | $5.879 | ▼ 11% |
| Madrideurope-southwest1 | $6.608 | $5.879 | ▼ 11% |
| Turineurope-west12 | $6.608 | $5.879 | ▼ 11% |
| Delhiasia-south2 | $6.72 | $5.978 | ▼ 11% |
| Los Angelesus-west2 | $6.72 | $5.978 | ▼ 11% |
| Salt Lake Cityus-west3 | $6.72 | $5.978 | ▼ 11% |
| Dohame-central1 | $6.832 | $6.053 | ▼ 11% |
| Singaporeasia-southeast1 | $6.888 | $6.129 | ▼ 11% |
| Sydneyaustralia-southeast1 | $7.00 | $6.227 | ▼ 11% |
| Osakaasia-northeast2 | $7.168 | $6.378 | ▼ 11% |
| Seoulasia-northeast3 | $7.168 | $6.378 | ▼ 11% |
| Tokyoasia-northeast1 | $7.168 | $6.378 | ▼ 11% |
| Warsaweurope-central2 | $7.224 | $6.427 | ▼ 11% |
| Melbourneaustralia-southeast2 | $7.28 | $6.476 | ▼ 11% |
| Jakartaasia-southeast2 | $7.504 | $6.676 | ▼ 11% |
| Hong Kongasia-east2 | $7.84 | $6.974 | ▼ 11% |
| Zuricheurope-west6 | $7.84 | $6.974 | ▼ 11% |
| Santiagosouthamerica-west1 | $8.008 | $7.125 | ▼ 11% |
| Berlineurope-west10 | $8.624 | $7.674 | ▼ 11% |
| São Paulosouthamerica-east1 | $8.904 | $7.923 | ▼ 11% |
| Dammamme-central2 | $8.96 | $7.97 | ▼ 11% |
Keep exploring
Each type’s own page, and how it compares with others.
GCP AlloyDB PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.