CallTower review (2026): is it worth it?
Business voice for Teams, Webex and Zoom, plus contact center
Black Friday: is there a CallTower sale?
CallTower report card
Weak · out of 4.0 · graded Nov 13, 2026
Best for business calling for Teams, Webex and Zoom
CallTower supplies phone service for Microsoft Teams, Webex and Zoom, plus contact center platforms. No prices are published, and the platforms' own licenses are bought separately.
Who CallTower is for
- Fits if your company already runs on Teams, Webex or Zoom
- Works for IT partners who resell business phone service
Who CallTower is not for
- Skip it if you want a posted price, as quotes go through sales
- Watch out: the Teams, Webex or Zoom licenses are a separate cost
- Not for you if you want a standalone phone system, as it adds calling to other platforms
- Tight if you want to buy direct, as the listing shows it sells largely through resellers
Why CallTower gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for moneyNo pricing published; it goes through sales or channel partners.
- FFree plan and trialNo free plan and no free trial is offered on the pages we read.
- CFeaturesCalling for Teams, Webex and Zoom, voice add-ons, texting, faxing and contact center platforms. It needs those platforms' own licenses.
- CEase of useNo store rating on record. It's sold through sales and partners.
- BPlatforms and integrationsWeb, with Teams, Webex, Zoom, Five9 and Genesys Cloud.
What these grades rest on. Graded from this listing, whose facts were read from CallTower's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/calltower#review"><img src="https://toolgpa.com/badge/calltower.svg" alt="CallTower: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where CallTower stands among business phone systems
CallTower's GPA of 1.8 is higher than 12 of the 77 other business phone systems we grade, and level with 15.
It stands best on platforms and integrations (B, above 14 of 77) and worst on free plan and trial (F, above 0).
Each grade against the category
Every bar is all 78 business phone systems we grade, cut by the letter each got. CallTower’s own letter is outlined.
- CValue for moneyAbove 7 of 77, level with 53
- FFree plan and trialAbove 0 of 77, level with 44
- CFeaturesAbove 9 of 77, level with 44
- CEase of useAbove 11 of 77, level with 56
- BPlatforms and integrationsAbove 14 of 77, level with 43
Keep CallTower, or make your own?
Keep it
To replace CallTower you would be making phone numbers and calls carried over the phone network. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 50 of the 77 other business phone systems grade higher.
What you could not
- Phone numbers and calls carried over the phone network.
- Fax numbers connected to the phone network.
- Texts from a business number, registered with the carriers.
- It plugs into other products, Microsoft Teams, Webex and Zoom among them.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. CallTower’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is CallTower?
CallTower sells cloud voice and contact center services built around Microsoft Teams, Cisco Webex and Zoom. It provides calling, SIP, texting and compliance add-ons, resells contact center platforms such as Five9 and Genesys Cloud, and sells mainly through channel partners.
Worth knowing
- No pricing is published, so pricing is unverified and goes through sales or channel partners.
- It supplies calling for other collaboration platforms, whose own licenses are bought separately.
- Partner, agency and MSP programs show it sells largely through resellers.
Key features
- Teams, Webex and Zoom calling
- Provides calling for Microsoft Teams through Operator Connect and Direct Routing, Webex Calling and Webex Dedicated Instance, and Zoom Phone.
- Voice add-ons
- Lists Dynamic E911, one-click failover, voice spam blocking, CRM integration, compliance recording and call analytics for Teams and Webex.
- Texting and faxing
- Offers texting for Microsoft Teams and for Webex Calling, a fax service, and CT SIP trunking.
- Contact center platforms
- Supplies Five9, Genesys Cloud, Webex Contact Center and Zoom Contact Center, along with its own CT Contact Center and consulting services.
- Support and portal
- Lists 24/7/365 support, a service level agreement and the CallTower Connect portal for controlling services.
CallTower pricing
We could not confirm CallTower’s current pricing from its own site, so we are not listing plans here. See calltower.com for current prices.
Works with
- Microsoft Teams
- Webex
- Zoom
- Five9
- Genesys Cloud
CallTower alternatives
- CallTower vs RingCentral
Free trial · from $20/mo
- CallTower vs Intermedia Unite
From $27.99/mo
- CallTower vs Nextiva
From $15/mo
- CallTower vs 8x8
Paid
Common questions
Does CallTower have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. CallTower is listed for Web.
Does CallTower have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. CallTower is listed for Web.
Is CallTower open source?
CallTower is not described as open source on its own site, as read on Nov 13, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.