All prices below are per month unless otherwise specified.
Let U be the total number in millions of files uploaded to the gateway per month.
Let D be the total number in millions of non-cached download requests per month.
Based on the below breakdown, the estimated cost per month would be
$20 + ($6.15)U + ($4.02)D
assuming that D + 2U < 14.
So, for example, if your gateway receives one upload request and one non-cached download request every second of every day (~2.5 million per month), the total cost would be approximately $45 per month.
On the other hand, if your gateway has only 100,000 uploads and 100,000 non-cached downloads per month, the cost would be approximately $21 per month.
$20/user (only 1 user needed)
1 TB bandwidth included - but we would never expect to come close to that since none of the actual data files are sent through Vercel.
1000 GB-hours of serverless function execution included. The number of requests is on the order of D + 2U million. If we assume 250ms per request and 1GB RAM allocated, then we are allotted around 14 million function calls for free. After that it gets a lot more expensive $400 per 1000 GB-hours. So if it gets that point, we'd want to arrange for custom pricing and an enterprise account.
If we are below the threshold of D + 2U < 14 then the total cost per month for the Vercel service is
$20 assuming D + 2U < 14
Each upload results in around 1 read operation and 1 write operation.
Each non-cached download results in around 2 read operations and 2 write operations.
The cost of one million read operations ranges between $0.09 and $0.22 depending on the daily volume (let's estimate it at $0.15).
The cost of one million write operations ranges between $0.90 and $2.20 depending on the daily volume (let's estimate it at 1.50).
So the estimated cost per month would be
($1.65)U + ($3.30)D