Free and open first

Best Unified Communications as a Service in 2026

27 apps
Research read 28 Sept 2026
How the order is worked out

1

3CX
by 3CX
Free plan WebWindowsLinux+3

7.7 Free plan · paid from $300/yr Visit site
2

Microsoft Teams
by Microsoft Teams
Free plan AndroidiPhoneLinux+3

Teams covers messaging, calls, and meetings across platforms, with a free plan and business options that list expanded meeting and support features.

7.4 Free plan Visit site
3

Zoom Workplace
by Zoom Workplace
Free plan AndroidExtensioniPhone+4

Zoom Workplace offers meeting and collaboration features across a broad set of platforms, with a free one-user Basic plan and a paid Pro option.

6.9 Free plan · paid from $15.99/user/mo Visit site
4

Dialpad Connect
by Dialpad Connect
Free trial AndroidiPhoneMac+2

Dialpad Connect combines business calling with chat, meetings and AI-generated call notes across devices. Review the plan details and request pricing as needed, since no plan prices are listed.

6.4 14-day trial Visit site
5

Nextiva
by Nextiva
Free trial AndroidAPIExtension+5

Nextiva combines business calling with messaging, meetings, and collaboration features across its plans. The listed monthly options begin at $15 a month, and there is no free plan or trial.

6.2 From $15/user/mo Visit site
6

NFON Cloudya
by NFON Cloudya
Free trial AndroidAPIiPhone+3

Cloudya combines business calling features with web, desktop, and mobile access.

6.2 From €6.80/user/mo Visit site
7

Avaya Cloud Office
by Avaya Cloud Office
Paid AndroidiPhoneMac+2

Avaya Cloud Office brings business communications into one service with broad platform coverage and several plan tiers.

6.1 Visit site
8

Orange Business Rainbow

Free plan AndroidiPhoneMac+2

6.1 Free plan · pricing on request Visit site
9

Placetel
by Placetel
Free trial AndroidAPIiPhone+3

Placetel combines a broad business phone feature set with desktop, mobile, browser, and API access. Its 30-day trial and tiered support let teams evaluate the service before choosing a paid plan.

6.1 From €6.90/user/mo · 30-day trial Visit site
10

Broadvoice Cloud PBX
by Broadvoice Cloud PBX
Paid AndroidiPhoneMac+2

Choose Broadvoice Cloud PBX if your team needs managed business calling, flexible call handling, and options for mobile and remote users.

6.0 From $10/user/mo Visit site
11

BT Cloud Voice

Paid AndroidiPhoneMac+2

BT Cloud Voice combines internet calling, routing, voicemail, conferencing, analytics, and collaboration integrations.

6.0 From £10.52/user/mo Visit site
12

Evolve IP Phone System
by Evolve IP Phone System
Paid AndroidAPIiPhone+1

Evolve IP Phone System covers calling, collaboration, administration and reporting in a cloud platform.

5.9 Pricing on request Visit site
13

GoTo Connect

Paid AndroidiPhoneMac+2

GoTo Connect spans business phone features, customer messaging, and contact center tools.

5.9 Pricing on request Visit site
14

Intermedia Unite
by Intermedia Unite
Paid AndroidiPhoneMac+2

Intermedia Unite combines broad communications features with business integrations, security controls, and two main plan levels.

5.8 From $27.99/user/mo Visit site
15

Ooma Office
by Ooma Office
Paid WebWindowsMac+2

Ooma Office combines business calling features with desktop and mobile access across five platforms.

5.7 From $19.95/user/mo Visit site
16

net2phone UNITE
by net2phone UNITE
Paid AndroidiPhoneWeb

UNITE brings business calling and other communications into one platform, with plans that add international calling, expanded video, and AI features.

5.6 From $19.99/user/mo (annual) Visit site
17

PanTerra Streams.AI
by PanTerra Streams.AI
Paid AndroidAPIiPhone+3

Streams.AI covers business communications from phone service through contact-center operations, with higher plans adding collaboration and monitoring tools.

5.6 From $17.95/user/mo Visit site
18

Sangoma Communications Platform
by Sangoma Communications Platform
Paid AndroidAPIiPhone+4

Sangoma Communications Platform covers communications, meetings, contact-center work and customer outreach across several deployment models.

5.5 Pricing on request Visit site
19

UNIVERGE BLUE CONNECT
by UNIVERGE BLUE CONNECT
Paid AndroidiPhoneMac+2

Choose CONNECT if you want a cloud service combining business calling with chat, meetings and file collaboration across desktop and mobile platforms.

5.5 Pricing on request Visit site
20

Yeastar P-Series Cloud Edition
by Yeastar P-Series Cloud Edition
Free trial AndroidAPIExtension+4

Yeastar P-Series Cloud Edition covers calling, contact-center communication, integrations, and multiple client types in one service.

5.5 30-day trial Visit site
21

Vonage Business Communications

Paid WebWindowsMac+2

Vonage Business Communications combines business calling features with desktop and mobile access.

5.4 From $17.99/mo (annual) Visit site
22

Webex Experience Management

Paid AndroidAPIiPhone+1

Webex Experience Management combines journey mapping, feedback analytics, and follow-up tools for customer experience programs.

5.4 Pricing on request Visit site
23

Wildix
by Wildix
Paid WebWindowsMac+3

Choose Wildix if your organization needs business communications across desktop and mobile platforms and its listed call features fit your needs.

5.4 Pricing on request Visit site
24

RingCentral RingEX
by RingCentral RingEX
Paid AndroidiPhone

RingEX brings core business communications and collaboration into one app, with broad integrations and mobile support.

5.2 From $19.99/user/mo (annual) · 14-day trial Visit site
25

BoomTalk

Paid AndroidiPhoneMac+1

5.0 From $20/mo (annual) Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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