Thread
A single concurrent request in flight. Providers sell thread counts as a cap on how many requests you can have open at once.
Why it costs you money
It sets your ceiling on how fast you can work, no matter how much traffic you bought. It is also where unlimited plans hide the meter: several providers sell uncapped gigabytes and then price the thread count, so the resource you run out of is concurrency rather than data.
See it in the data
Related terms
- Concurrency limitThe cap on how many requests you can have in flight at once. Often the real constraint on a scraping job, not price.
- Success rateThe share of requests that get through. The number that decides everything, and the one no comparison table can give you.
- Ports vs IPsA numbered endpoint you connect to. On some providers a port is the billing unit, and it is not the same as an address.
- Per-GB pricingBilling by the gigabyte you move, the dominant model for residential proxies and the one most comparisons assume.
- Every term we define