Pick the right call center software.
Skip the sales call.
Honest comparisons of dialers and cloud phone systems, free VoIP calculators and plain-English guides — written by someone who has built VoIP platforms.
Power, predictive or cloud phone?
Pick by how your team calls, not by whose ad you saw first. Open any app for its plans, its trial and what to check before you buy.
| Provider | Best for | Dialer type | Starts at | Link |
|---|---|---|---|---|
| CallHippo | Budget-conscious call centers | Predictive · Power dialer | Free plan; paid plans from about $18 per user / month | Try free with CallHippo (opens in new tab) |
| CloudTalk | Sales and support teams that live in a CRM | Power · Smart · Parallel dialers | From €19 per user / month, billed annually | Try free with CloudTalk (opens in new tab) |
| JustCall | Sales and support teams that want calls, texts and CRM sync in one app | Power dialer · Predictive on SalesPro | $29 per user / month, billed annually (2-user minimum) | Try free with JustCall (opens in new tab) |
| KrispCall | Small teams that need numbers in several countries | Cloud phone · Power dialer | See site | Try free with KrispCall (opens in new tab) |
| PhoneBurner | Individual reps making lots of calls | Power dialer | $140 per user / month, billed annually | Try free with PhoneBurner (opens in new tab) |
| Quo | Small teams in the US and Canada that mostly call and text customers | Business phone · Calls and texts | $15 per user / month, billed annually ($19 monthly) | Try free with Quo (opens in new tab) |
| Readymode | Outbound call centers | Predictive dialer | $199 per license / month (1 to 4 licenses) | Book demo with Readymode (opens in new tab) |
Listed alphabetically: the order is not a ranking.
Companies cannot pay to be listed or ranked here. How we make money
Prices and features are read from each provider's own pricing page (checked 17 October 2026). They change often and can differ by country and currency, so confirm on the provider's site before you buy. “Check” means the pricing page doesn't say, or we haven't verified that app yet.
Know what you're buying
Plain-English explainers for the features that decide which software you need, with which apps list each one.
Power dialer
Dials the next number the moment a rep is free.
Predictive dialer
Dials several numbers per free agent to maximise talk time.
Call recording
Records calls for training, disputes and compliance.
IVR and auto attendant
Phone menus that route callers before a person answers.
Call routing and queues
Sends each call to the right person or queue.
Voicemail drop
Leaves a pre-recorded voicemail in one click.
Local presence
Shows a local-looking caller ID to improve answer rates.
SMS and MMS
Business texting from the same number as your calls.
Free calculators for people who run calls
Staffing, SIP channels, call quality and bandwidth. Everything runs in your browser.
Erlang C staffing
How many agents you need for a target service level.
Erlang B / SIP channels
How many SIP trunk channels or phone lines you need.
Shrinkage calculator
Turn breaks, training and leave into a shrinkage %.
Codec bandwidth
G.711, G.729, G.722 — bandwidth per concurrent call.
VoIP call quality (MOS)
Estimate MOS from latency, jitter and packet loss.
Recording storage
How many GB your call recordings will use.
SIP trunk cost
Per-minute or per-channel: which is cheaper, and the break-even.
Cold-call funnel
Dials, conversations and reps needed to hit a sales goal.
Learn it once, properly
Need a number, or wondering who called?
We don't sell numbers, but we can point you to the apps that do, and explain what each US and UK area code means.
Free virtual numbers
Apps that give you a second US, UK or Canadian number, and which ones work from outside the US.
Look up an area code
Location, time zone and scam warning signs for US and UK codes.