Free and open first

Best Cloud PBX Software 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

CloudTalk AI Voice Agent
by CloudTalk AI Voice Agent
Free plan AndroidAPIiPhone+4

CloudTalk pairs automated call handling with escalation to human agents and a range of integrations.

7.5 From $99/mo · 14-day trial Visit site
3

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.

7.3 Free plan Visit site
4

MyOperator
by MyOperator
Free plan AndroidAPIExtension+2

Pick MyOperator if your team wants calling, WhatsApp, and AI agents in a shared customer communication platform, with a limited-feature sandbox trial to explore selected workflows.

7.2 From ₹5,000/mo (annual) Visit site
5

OnSIP
by OnSIP
Free plan AndroidiPhoneMac+2

OnSIP offers a free tier alongside paid calling and business phone features. The restriction on regular-number dialing for free SIP accounts is an important distinction when choosing a plan.

7.2 Free plan · paid from $18.95/user/mo · 30-day trial Visit site
6

Voxbi
by Voxbi
Free plan AndroidAPIiPhone+3

Voxbi offers a free entry plan and paid options with different calling, summary, history, and reporting allowances. Check per-minute charges and plan-specific conditions when choosing an option.

7.0 Free plan · paid from €1.20/user/mo · 14-day trial Visit site
7

SMSala
by SMSala
Free plan APIWeb

SMSala combines messaging, verification, and other communications APIs, with delivery reporting and developer resources.

6.8 Pricing on request Visit site
8

Acefone
by Acefone
Free trial AndroidAPIExtension+4

Acefone combines multichannel business communications with contact-center workflows, integrations, and listed security controls.

6.6 From ₹1,599/user/mo · 7-day trial Visit site
9

Knowlarity Cloud Contact Center
by Knowlarity Cloud Contact Center
Free trial AndroidAPIiPhone+1

Knowlarity provides cloud call handling with routing, recording, CRM connections, and mobile access.

6.3 From ₹1,999/mo Visit site
10

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.

6.1 From $15/user/mo Visit site
11

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.

6.0 Visit site
12

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
13

GoTo Connect

Paid AndroidiPhoneMac+2

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

5.8 Pricing on request Visit site
14

Zoom Phone
by Zoom Phone
Free trial AndroidiPhoneLinux+2

Choose Zoom Phone if you need a cloud phone system with routing tools, voicemail transcription, and connected communications across multiple platforms.

5.8 From $10/user/mo Visit site
15

Mitel Secure Cloud
by Mitel Secure Cloud
Paid AndroidiPhoneMac+2

Mitel Secure Cloud brings business communications and contact-center functions into a dedicated managed environment.

5.7 Pricing on request Visit site
16

Dollu CCaaS
by Dollu CCaaS
Paid APIWeb

Dollu CCaaS brings multichannel routing, outbound dialing, workforce tools, and conversation quality features into one contact center service.

5.6 Pricing on request Visit site
17

ByondVoice
by ByondVoice
Paid Web

5.5 Visit site
18

KataTelecom Cloud PBX
by KataTelecom Cloud PBX
Paid AndroidiPhoneLinux+3

KataTelecom Cloud PBX centralizes business calling, routing, recording, and queue management across many platforms. Buyers should confirm number, configuration, and plan details before activation.

5.5 Pricing on request Visit site
19

Ooma Office
by Ooma Office
Paid WebWindowsMac+2

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

5.5 From $19.95/user/mo 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

VirtualPBX
by VirtualPBX
Paid WebWindowsiPhone+1

VirtualPBX provides core business phone features with desktop and mobile applications.

5.4 From $15/user/mo · 14-day trial Visit site
22

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
23

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
24

ChoiceCloud PBX

Paid AndroidiPhoneMac+2

4.9 From £4.99/mo Visit site
25

Globalgig Hosted PBX

Paid AndroidiPhoneWeb

4.8 Pricing on request 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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