How to Choose a VoIP Provider

Question 1: How many people answer the phone?

Just you (or you plus a partner): you don't need a phone system, you need a professional layer over your cell — that's Grasshopper. 2–20 people: the sweet spot for Ooma Office and Phone.com. 20+, multiple departments or sites: you want real admin tooling — RingCentral or Nextiva.

Question 2: How much do you actually call?

Pull last month's usage before you shop. Businesses that mostly receive calls waste money on unlimited plans — metered tiers from Zoom Phone or Phone.com cost half as much. Teams making heavy outbound calls (sales, collections, dispatch) should only compare unlimited plans, where Nextiva and RingCentral compete hard.

Question 3: Desk phones, apps, or both?

If your team is happy on mobile and desktop apps, every provider works and you'll save on hardware. If you want physical desk phones, check certified-device lists and provisioning support before signing — and consider whether existing analog phones plus an adapter (Ooma's specialty) beats buying IP phones outright.

Question 4: What does the phone need to talk to?

If calls should log to a CRM, pop customer records, or schedule from your calendar, integration depth is your deciding factor — RingCentral leads by a wide margin, with Zoom Phone strong inside its own ecosystem. If the phone just needs to ring, don't pay for integrations you'll never connect.

Question 5: Monthly or annual? Read the pricing footnotes.

Advertised VoIP prices usually assume annual billing and sometimes a minimum seat count. Before comparing, normalize every quote to your team size, your billing term, with taxes/fees estimated. Watch for: first-year promotional rates that jump at renewal, toll-free minute overages, extra-number fees, and per-user minimums. A provider that looks $5 cheaper per seat can invert entirely at your actual configuration.

Question 6: Who picks up when it breaks?

Phones down = business down, so weigh support like a feature. If you have no IT staff, Nextiva's support reputation is worth real money. If you have an IT team, admin tooling and documentation (RingCentral's strength) matter more than hand-holding.

Question 7: What happens to your current number?

Any provider worth considering ports your existing numbers in free. Confirm it explicitly, get the timeline in writing, and never cancel old service until the port completes. If you're upgrading your number too, this is the moment — see our vanity number guide for getting a memorable number to port in with you.

Putting It Together

Ready to compare? The full provider comparison has ratings, pros and cons, and pricing notes for every service mentioned here.