Companies buy a phone system about twice a decade, usually because the old one died, the office moved, or a renewal notice arrived. The market calls the modern product UCaaS: a cloud platform that bundles calling, video meetings, and messaging into one per user subscription. On paper the leading platforms have nearly identical feature lists, which is exactly why buying on features fails. The real differences live in fit, migration, and the contract, and that is what this guide walks through.
Write down how your company actually uses phones
Before any demo, spend an hour on one page of facts: who talks all day and who barely touches a phone, how a call reaches the front desk and where it goes when nobody answers, which ring groups and auto attendants exist because someone needs them and which exist because nobody ever removed them. Then inventory the unglamorous part: fax lines, door buzzers, alarm panels, elevator phones, and anything else plugged into old copper. Those analog stragglers decide more migration pain than any feature does, and platforms handle them very differently. This page, not a requirements template, is what keeps the evaluation honest.
Settle the Microsoft Teams question first
If your company runs Microsoft 365, decide up front whether Teams Phone is your default answer, because the license math starts low enough to reframe everything you look at afterward. The honest tradeoffs: Teams Phone brings carrier decisions, enablement work, and support boundaries that the turnkey platforms bundle away, and companies without Microsoft depth on staff feel that. Deciding first does one of two things, and both help. Either it ends the evaluation early, or it tells you precisely why Teams is not your answer, which sharpens every other choice, and leaves a real Teams quote on the table as leverage besides.
Shortlist by fit, not by feature list
Feature parity across the credible platforms is real, but sweet spots are not interchangeable: some platforms fit app first companies that will never rack a desk phone, others fit desk phone cultures with a receptionist and paging, others earn their keep on analytics heavy sales floors or deep CRM integration. Our ranked evaluation of the UCaaS market states who each platform actually fits; match your one page of facts to it and take three or four into trials. More than that and the process owns you.
Trial on your own network, with your hardest users
Vendors run demos on networks tuned for demos. Run the trial on your wifi, your laptops, and the phones in your people's pockets, and include the users who will complain loudest: the front desk, the road warrior, the person who hates change on principle. Have them make real calls for two weeks. Then sit an administrator down without the salesperson and change a call flow, add a user, and reroute the after hours greeting. If the platform only feels good with a sales engineer driving, that is information.
Plan the number port before you sign
Moving the numbers is the actual migration; everything else is installation. Carriers are required to release your numbers, but ports take coordination: a simple single carrier port can complete in days, while a multi location tangle across several carriers takes weeks and an owner watching it. The rules that prevent disasters are simple. Never cancel the old service until every number has moved. Run both systems in parallel through the cutover. Confirm the emergency address on every line as part of the port, not after. And give every analog straggler a plan of its own, whether that is an adapter, an electronic fax service, or keeping one copper or wireless line alive for the alarm panel.
What it actually costs
Published list pricing across the market runs roughly $15 to $45 per user per month by tier, it is honest at small seat counts, and it becomes a starting offer somewhere above twenty five seats. Desk phones and room hardware are a separate budget line that app first companies mostly delete. The mechanics of how the number is really built, tier placement, term, devices, and international, are their own subject, and we break them down in our UCaaS pricing guide. The short version is that the sticker is negotiable and the comparison work is the leverage; we pull real numbers across the whole market at once, free.
Frequently asked questions
- How long does switching business phone systems take?
- A single location with straightforward numbers typically lands in two to four weeks, and the schedule is driven by the number port, not the software. Multi location businesses phase the rollout and should plan on one to three months depending on carrier count and analog cleanup. The reliable rule is to set the port date first and build the project around it, with the old system kept alive in parallel through cutover.
- Can we keep our phone numbers?
- Yes. Number portability is your right, and every credible platform manages the port for you. The practical cautions: the losing carrier has no incentive to hurry, port dates slip when account records do not match exactly, and canceling old service before the port completes is the one mistake that genuinely strands numbers. Pull a current customer service record from your carrier early; clean records are the difference between a port that takes days and one that takes a month.
- Do we still need desk phones?
- Mostly no. The apps on laptops and mobiles are now the primary experience on every leading platform, and headsets beat handsets for anyone on calls all day. The honest exceptions: reception and front desk positions, conference rooms, and environments like warehouses or clinics where a shared wall phone still earns its place. Buying hardware only for those spots, instead of one phone per desk by default, is one of the easiest savings in the whole purchase.
- Do we need help buying a phone system?
- What buyers usually lack is not opinions but market data: what each platform really fits, what companies your size actually pay, and which quote is a first offer. A Technology Advisor from our team runs that comparison across the whole market, arranges the trials, and pulls competing quotes, free. You keep the decision and you sign directly with the provider you choose.