Concurrent connections, often called threads, represent the number of simultaneous active connections your proxy plan can handle at any given moment. If your plan includes 500 threads, you can have 500 requests in flight at the same time. Each thread is an independent connection that can route through a different IP address.
When your scraper, browser, or application opens a connection through the proxy gateway, it occupies one thread. Once that request completes, the thread is freed for the next connection. If you try to open more connections than your plan allows, the extra requests queue or get rejected depending on the provider. Thread count is the primary lever that determines how fast you can work. More threads means more parallel requests, which means higher throughput.
Threads determine two things: how many tasks you can run in parallel, and your maximum speed. ScaleProxy uses a transparent speed formula: threads x 2 = max Mbps. A Starter plan with 100 threads gives you up to 200 Mbps. Growth with 500 threads gives you up to 1 Gbps. Scale with 1,000 threads gives you up to 2 Gbps.
This is a better model than per-GB billing. You know exactly what you are paying for, and bandwidth is unmetered. Run as much data through your threads as you want. No overage charges, no surprise bills at the end of the month.
Pick the plan that fits your workload. Start with a $10 for 10 days trial.