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Concurrency limit

The cap on how many requests a plan lets you run at the same time. Some providers sell it as a separate dimension from bandwidth; some do not limit it at all.

Why it costs you money

This is frequently the binding constraint rather than price. A plan with cheap bandwidth and a low concurrency cap can take days to finish a job that a dearer plan finishes in an hour, and the cap is usually further down the pricing page than the headline rate.

See it in the data

Related terms

  • Bandwidth overageWhat a provider charges once you pass the gigabytes your plan includes. Often several times the headline rate.
  • Sub-userA separate set of credentials under one account, so you can split traffic by project, client or machine.
  • Every term we define