Partner profile
CallTower
Cloud Communications Solutions for Microsoft Teams + Cisco Webex
Founded 2002 · South Jordan, Utah · 51-200 employees · Private, VC/PE backed
Partnership Overview
Who CallTower is built for
Mid-market to enterprise organizations standardizing on Microsoft Teams Phone or Cisco Webex Calling; channel-led customers; multi-platform UC needs in single-vendor delivery.
CallTower is a US-based unified communications and contact center provider with one of the strongest Microsoft Teams Operator Connect / Direct Routing practices in the channel. CallTower delivers integrated UCaaS (Microsoft Teams Voice, Cisco Webex Calling, native CallTower CXM), CCaaS, SIP trunking, and a Voice Operator Suite to mid-market and enterprise customers. Backed by HGGC private equity. Strong channel-led GTM through TSDs.
- VerifiedSep 7, 2026 · high confidence
- 5solutions across 1 category
- 24 yrsin business, since 2002
- 51-200employees
Why teams pick CallTower
- One of the largest Microsoft Teams Operator Connect providers
- Multi-platform UCaaS (Teams, Webex Calling, native CallTower)
- Channel-led GTM (TSD-friendly)
- HGGC private equity backing
- Mid-market to enterprise focus
Probably not a fit
We haven't published fit caveats for CallTower yet. Tell us what you run and we'll say whether they fit, or who we'd look at instead.
Get matched insteadRecognition & proof points
Microsoft Verified Operator Connect ProviderProof point · Microsoft
Cisco Webex Calling certifiedCertification · Cisco
Frost & Sullivan recognitionAnalyst recognition · Frost & Sullivan
Notable clients
Vendor-reportedPING (PING Golf), KPFF (national engineering firm), Westfield Bank, Sight & Sound Theatres, and Hiebing (marketing agency) — all published Microsoft Teams Direct Routing / Operator Connect case studies. Also serves U.S. government agencies and contractors via Microsoft 365 GCC High Teams Direct Routing (referred by Microsoft, partnered with TCI).
Our Solutions
Rubber Duck solutions through CallTower
From first evaluation to day-to-day operations, Rubber Duck Technology helps you get full value from CallTower's Communications & CX solutions. We fit them to the systems you already run, remove overlap, and give you a clear view of how they perform, so your team can move faster with fewer surprises.
Communications & CX
UCaaS / Cloud PBX
CallTower delivers multi-platform UCaaS spanning Microsoft Teams Voice, Cisco Webex Calling, and its native CallTower platform for mid-market and enterprise customers.
- Multi-platform UCaaS Offers Teams, Webex Calling, and native CallTower from one provider rather than a single platform.
- Mid-market to enterprise Focused on serving mid-market and enterprise communications needs.
Microsoft Teams
Cisco WebexMicrosoft Teams Voice
CallTower runs one of the largest Microsoft Teams Operator Connect and Direct Routing practices in the channel, adding enterprise voice to Microsoft Teams.
- Top Operator Connect Among the largest Microsoft Teams Operator Connect providers in the market.
- Direct Routing as a Service Offers DRaaS to bring PSTN calling into Teams flexibly.
Microsoft TeamsSIP Trunking
CallTower provides SIP trunking and hosted voice to connect customer telephony to the PSTN alongside its UCaaS platforms.
- Voice integration SIP trunking complements Teams and Webex voice deployments from one provider.
- Channel-friendly Sold through a TSD-friendly channel-led go-to-market.
Microsoft TeamsCisco WebexCCaaS / Cloud Contact Center
CallTower delivers CCaaS through its CallTower Solgari offering, extending contact center capabilities alongside its UCaaS platforms.
- Integrated UC + CC Contact center pairs with the UCaaS portfolio from a single provider.
- CRM connectivity Integrates with Salesforce and major CRMs for contact center workflows.
Microsoft Teams
SalesforceVideo Conferencing / Collaboration
CallTower delivers collaboration and video through Microsoft Teams and Cisco Webex as part of its multi-platform UCaaS portfolio.
- Platform choice Customers can collaborate on Teams or Webex under one provider.
- Unified experience Video and voice are delivered together within the UCaaS platform.
Microsoft TeamsCisco WebexHow CallTower delivers
24/7 US-based support; named CSMs for enterprise; channel partner support model. (vendor-reported)
Services in detail
- Implementation & OnboardingDelivered as project-based implementation and enablement, often via TSD channel partners.
- Migration ServicesDelivered as project-based migration engagements.
- 24/7 SupportDelivered as fully managed 24/7 support.
- Customer SuccessDelivered as an ongoing managed customer success engagement.
- Partner EnablementDelivered through a channel-led go-to-market focused on TSD partners.
Automate/AI, built in · AI-Powered Features. AI-powered features are delivered through the CallTower Solgari CCaaS suite (conversational AI, sentiment and voice analytics, call transcription/summaries) and Microsoft Teams/Copilot-enabled UC; CallTower is a UC/CC delivery provider that embeds and resells these AI capabilities rather than developing a native AI engine.
Compare
One quote is a price. Three quotes are a market.
We'd price CallTower next to these. Same scope on one page, sent to every provider, so the numbers actually line up.
Who we'd price next to CallTower
RingCentral Communicate
AI-First Cloud Communications
Already talking to someone else? Tell us and we'll put them in the mix.
Case Studies
What backs it up
3 published case studies from CallTower
CallTower · Professional Services
KPFF moves 14 departments to Microsoft Teams calling with CallTower
Read more
Documents
From CallTower
5 PDFs, collected while we vetted them
- CallTower Microsoft Voice Solutions BrochureDownload
- CallTower Native Microsoft Teams Direct Routing WhitepaperDownload
- CallTower PING Golf Microsoft Teams Case StudyDownload
- CallTower KPFF Journey to MS Teams Calling Case StudyDownload
- CallTower GCC High Teams for Government Agencies Case StudyDownload
Profile compiled by Rubber Duck Technology from primary sources and partner collateral. Vendor-reported figures are labeled as theirs. Spot something wrong? Tell us.
Technology that doesn't sink under pressure
Talk it through before you sign.
Send us what you run today. We'll price CallTower against two alternatives and tell you which one we'd pick, and why.