VICIdial server cost by agent count

Server cost is the fixed leg of a VICIdial budget, and it tracks agent count in steps rather than a smooth line. Ten agents fit a small box; a hundred need a dedicated machine. Pick the tier that matches your peak concurrency and you only revisit it when you grow.

The server is one of three cost legs in what VICIdial really costs. This post sizes that leg by headcount.

What drives the size

VICIdial runs on Asterisk, the open-source PBX engine that handles every call leg. Each agent under predictive dialing holds several Concurrent calls, simultaneous active channels, where a Channel is one live audio path. So a box is sized by Concurrent calls and Lines per agent (how many numbers ring per agent at your dial ratio), not just the raw seat count. Recording every call adds disk pressure, since Call recording writes audio to the box and Recording retention, how long you keep those files, decides how much storage you carry.

Rough sizing by agent count

• About 10 agents: a small box, 2 to 4 cores and 4 to 8 GB RAM. Light dialing, modest recording storage.
• About 50 agents: 8 or more cores and 16 or more GB RAM, because concurrent channels and recordings climb fast.
• About 100 agents: a dedicated machine, 16 or more cores and 32 or more GB RAM, with SSD storage for recordings so disk I/O does not bottleneck calls.

A worked budget

Say you run 50 agents at a 2.5 dial ratio. That is up to 125 Concurrent calls at peak, which is why this tier wants 8-plus cores. Picture an illustrative $200-a-month box for that compute. On Managed hosting, a flat per-server fee, that one number also folds in OS patching, backups, firewall, and SSL on a Single tenant server, one customer per machine. There is no per-agent licensing on top, so the 50th agent costs the same as the first to seat.

From agents to a server line

flowchart TD
  A[Agent count] --> B[Dial ratio]
  B --> C[Peak concurrent calls]
  C --> D[CPU and RAM tier]
  E[Recording retention] --> F[Disk size]
  D --> G[Server cost line]
  F --> G
  H[Managed fee] --> G

Growing without overpaying

Because cost steps by tier, you do not pay for a 100-agent box while running 12 agents. Start on the tier that fits today and resize when concurrency forces it, not before. Resizing is a step change, not a daily knob, so the planning question is which agent peak you expect over the next quarter rather than this afternoon. Over-buying compute you never use is its own quiet waste.

We provision a fresh VPS, a virtual private server, with secured VICIdial in under 40 seconds, and there is a BYOI (bring your own infrastructure) path, bring-your-own-infrastructure, if you already own a suitable machine and just want us to install and manage it on hardware you control. That second option suits teams with a spare bare-metal box or existing cloud account who want the management without renting our compute. For the broader hosting picture, see VICIdial hosting cost.

Map your peak agent count to a tier above, then read it against real numbers on our pricing page. The right box is the smallest one that never sweats your busy hour.