# Asterisk vs Cisco Unified Communications Manager (CallManager) Comparison

---
## Frequently Asked Questions

### What is the difference between Cisco vs Asterisk?

Cisco and Asterisk differ most clearly in their G2 ratings, with Asterisk rated higher by reviewers, and in their top-cited strengths: Cisco for reliability and Asterisk for easy integration.

| [Cisco](https://www.g2.com/products/cisco-unified-communications-manager-callmanager/reviews) | [Asterisk](https://www.g2.com/products/asterisk/reviews) |
| --- | --- |
| 4.4/5 (111 reviews) | 4.6/5 (59 reviews) |
| Mid-Market | Mid-Market |
| 6.9 | 7.5 |
| 8.6 | 8.3 |
| Reliability (3 all-time mentions) | Easy Integration (1 all-time mention) |



### How do the pricing models of Cisco and Asterisk compare?

Asterisk is rated higher for value, with reviewers expressing greater satisfaction with its cost-effectiveness compared to Cisco.

- **Cisco:** In recent reviews, several reviewers cite high licensing and maintenance expenses as a drawback, especially for smaller businesses.
- **Asterisk:** Reviewers consistently highlight Asterisk's open-source, free-to-use model as a major advantage, noting significant cost savings and flexibility.
- **Switching reasons:** Recent reviews mention organizations moving to Asterisk to avoid high costs associated with proprietary solutions.



### What are the best alternatives to Cisco and Asterisk?

The best alternatives to Cisco and Asterisk are 3CX, Genesys Cloud CX, and RingEX.

| Product | G2 Rating (reviews) | Largest Segment | Pricing Insight | Top Reviewer-Cited Strength |
| --- | --- | --- | --- | --- |
| [Cisco](https://www.g2.com/products/cisco-unified-communications-manager-callmanager/reviews) | 4.4/5 (111 reviews) | Mid-Market | Relatively expensive, especially for smaller businesses | Reliability (3 all-time mentions) |
| [Asterisk](https://www.g2.com/products/asterisk/reviews) | 4.6/5 (59 reviews) | Mid-Market | Open-source and free to use, major cost savings | Easy Integration (1 all-time mention) |
| [3CX](https://www.g2.com/products/3cx/reviews) | 4.4/5 (547 reviews) | Mid-Market | — | — |
| [Genesys Cloud CX](https://www.g2.com/products/genesys-cloud-cx/reviews) | 4.4/5 (1558 reviews) | Mid-Market | — | — |
| [RingEX](https://www.g2.com/products/ringex/reviews) | 4.2/5 (1432 reviews) | Small-Business | — | — |



### Which VoIP Providers features should I prioritize when comparing Cisco and Asterisk?

Buyers comparing Cisco and Asterisk should prioritize Ease of Setup, Quality of Support, Reliability, Integration Capabilities, and Cost.

- **Ease of Setup:** Cisco scores 6.9, Asterisk 7.5.
- **Quality of Support:** Cisco scores 8.6, Asterisk 8.3.
- **Reliability:** Cisco has 3 all-time mentions for reliability, Asterisk does not have this as a top-cited theme.
- **Integration Capabilities:** Asterisk is cited for Easy Integration (1 all-time mention), Cisco for Easy Integration (1 all-time mention).
- **Cost:** Recent reviews highlight Asterisk's open-source, free-to-use model as a major advantage, while Cisco is noted for higher licensing and maintenance expenses.



### What are the pros and cons of Cisco vs Asterisk?

Cisco's headline strength is reliability, while Asterisk's is easy integration and cost-effectiveness.

- **Cisco strengths:** Reliability (3 all-time mentions), video conferencing (3 all-time mentions), robust feature set, and strong integration with other Cisco products.
- **Cisco trade-offs:** Higher licensing and maintenance costs, complex administration, and less intuitive user interface.
- **Asterisk strengths:** Easy integration (1 all-time mention), open-source and free to use, high customization, and flexibility for telephony infrastructure.
- **Asterisk trade-offs:** Requires technical expertise for setup and administration, limited official support, and initial configuration can be challenging.



### Is Cisco or Asterisk better for small businesses?

Asterisk is a better fit for small businesses due to its open-source model and cost advantages, while Cisco is primarily adopted by mid-market organizations.

- **Cisco:** Largest segment is Mid-Market; reviewers note that Cisco is not a profitable solution for small companies or those with fewer than 50 users due to higher costs.
- **Asterisk:** Largest segment is Mid-Market; reviewers highlight its suitability for small businesses because it is open-source, free to use, and highly customizable.



### Which VoIP Providers platform has better integrations?

Reviewers favor Asterisk for integrations, citing its flexibility and easy integration capabilities.

- **Cisco:** Reviewers mention integration with other Cisco products and Microsoft software, with one all-time mention for Easy Integration.
- **Asterisk:** Reviewers highlight easy integration with CRMs and other telephony tools, with one all-time mention for Easy Integration and additional qualitative mentions of broad compatibility.



### How do Cisco and Asterisk compare on customer support?

Cisco and Asterisk are rated within 0.3 points on Quality of Support, indicating near parity with Cisco slightly ahead at 8.6 versus Asterisk's 8.3.

- **Cisco:** Reviewers describe support as robust, with 24/7 TAC availability and positive experiences, though some note complex support processes and licensing requirements.
- **Asterisk:** Reviewers note community-driven support and extensive online resources, but mention that official support is limited and technical expertise is often required for troubleshooting.



### Which is easier to implement, Cisco or Asterisk?

Asterisk is rated higher for Ease of Setup, scoring 7.5 compared to Cisco's 6.9, indicating reviewers find Asterisk easier to implement.

- **Cisco:** Reviewers describe the setup as complex, often requiring specialized knowledge and planning, with some noting a steep learning curve for new administrators.
- **Asterisk:** Reviewers highlight straightforward installation for those with technical expertise, with many citing its flexibility and the availability of community resources to assist with setup.



### Which product has better Phone Calls?

Both Cisco and Asterisk are highly rated for Phone Calls, with Asterisk holding a slight edge in overall G2 rating.

- **Cisco:** G2 rating 4.4/5 (111 reviews); reviewers cite reliable call management and robust calling features.
- **Asterisk:** G2 rating 4.6/5 (59 reviews); reviewers highlight flexibility, high call quality, and the ability to handle large call volumes efficiently.



| | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Star Rating** | 4.6 out of 5 | 4.4 out of 5 | 
| **Total Reviews** | 59 | 111 | 
| **Largest Market Segment** | Mid-Market (50.0% of reviews) | Mid-Market (50.0% of reviews) | 
| **Entry Level Price** | $0.02 per minute | No pricing available | 

---
## Top Pros & Cons

### Asterisk

Pros:
- Customer Service (1 reviews)
- Easy Integration (1 reviews)

Cons:
- Complex Processes (2 reviews)
- Customer Service (1 reviews)

### Cisco Unified Communications Manager (CallManager)

Pros:
- Reliability (3 reviews)
- Video Conferencing (3 reviews)

Cons:
- Complex Processes (2 reviews)
- Billing Issues (1 reviews)

---
## Ratings Comparison
| Rating | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
  | **Meets Requirements** | 9.0 (45 reviews) | 9.1 (91 reviews) | 
  | **Ease of Use** | 7.8 (47 reviews) | 8.1 (92 reviews) | 
  | **Ease of Setup** | 7.5 (37 reviews) | 6.9 (52 reviews) | 
  | **Ease of Admin** | 7.9 (34 reviews) | 8.0 (54 reviews) | 
  | **Quality of Support** | 8.3 (38 reviews) | 8.6 (87 reviews) | 
  | **Has the product been a good partner in doing business?** | 8.3 (27 reviews) | 8.7 (53 reviews) | 
  | **Product Direction (% positive)** | 7.9 (45 reviews) | 8.4 (90 reviews) | 

---
## Pricing

### Asterisk

#### Entry-Level Pricing

Plan: Metered SIP Trunking

Price: $0.02 per minute

Description: Works well for businesses that may need more flexibility in their communications week to week.

Key Features:
- No set-up fees.
- Metered inbound and outbound local and long distance.
- Allows more dynamic call volume activity.

[Browse all 2 editions](https://www.g2.com/products/asterisk/pricing)

#### Free Trial

Yes

### Cisco Unified Communications Manager (CallManager)

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

---
## Features Comparison By Category

### Collaboration & Productivity

| Product | Score | Reviews |
|---|---|---|
| **Asterisk** | N/A | N/A |
| **Cisco Unified Communications Manager (CallManager)** | N/A | N/A |

#### Additional Functionality

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Third-Party Integrations** | Not enough data | Not enough data | 
| **To-Do List** | Not enough data | Not enough data | 
| **@mentions** | Not enough data | Not enough data | 
| **Single Sign On** | Not enough data | Not enough data | 
| **File Management** | Not enough data | Not enough data | 
| **Activity Dashboard** | Not enough data | Not enough data | 
| **Drag & Drop** | Not enough data | Not enough data | 
| **Alerts/Notifications** | Not enough data | Not enough data | 
| **Prioritization** | Not enough data | Not enough data | 
| **Access Controls/Permissions** | Not enough data | Not enough data | 
| **Screen Sharing** | Not enough data | Not enough data | 
| **Content Management** | Not enough data | Not enough data | 
| **Brainstorming** | Not enough data | Not enough data | 
| **AI Copilot** | Not enough data | Not enough data | 
| **File Transfer** | Not enough data | Not enough data | 
| **Calendar Management** | Not enough data | Not enough data | 
| **Status Tracking** | Not enough data | Not enough data | 
| **Real-Time Notifications** | Not enough data | Not enough data | 
| **Version Control** | Not enough data | Not enough data | 
| **Task Management** | Not enough data | Not enough data | 
| **Activity Tracking** | Not enough data | Not enough data | 
| **Real Time Editing** | Not enough data | Not enough data | 
| **Communication Management** | Not enough data | Not enough data | 
| **Chat/Messaging** | Not enough data | Not enough data | 
| **Tagging** | Not enough data | Not enough data | 
| **Generative AI** | Not enough data | Not enough data | 
| **Assignment Management** | Not enough data | Not enough data | 
| **Task Scheduling** | Not enough data | Not enough data | 
| **Project Management** | Not enough data | Not enough data | 
| **Collaboration Tools** | Not enough data | Not enough data | 
| **Workflow Management** | Not enough data | Not enough data | 
| **Secure Data Storage** | Not enough data | Not enough data | 
| **File Sharing** | Not enough data | Not enough data | 
| **Document Storage** | Not enough data | Not enough data | 
| **Task Progress Tracking** | Not enough data | Not enough data | 
| **Discussions/Forums** | Not enough data | Not enough data | 
| **Commenting/Notes** | Not enough data | Not enough data | 
| **Reporting & Statistics** | Not enough data | Not enough data | 
| **Contact Management** | Not enough data | Not enough data | 
| **Video Conferencing** | Not enough data | Not enough data | 
| **Progress Tracking** | Not enough data | Not enough data | 
| **Mobile Access** | Not enough data | Not enough data | 
| **API** | Not enough data | Not enough data | 
| **Document Management** | Not enough data | Not enough data | 
| **Customizable Branding** | Not enough data | Not enough data | 

### VoIP Providers

| Product | Score | Reviews |
|---|---|---|
| **Asterisk** | 8.6/10 | 46 |
| **Cisco Unified Communications Manager (CallManager)** | 8.6/10 | 46 |

#### Platform Basics - VoIP Providers

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **PBX systems, VoIP Softphone** | Not enough data | Not enough data | 
| **Call Management** | Not enough data | Not enough data | 
| **Network monitoring** | Not enough data | Not enough data | 
| **Integrations** | Not enough data | Not enough data | 
| **Virtual PBX** | Not enough data | Not enough data | 
| **SIP trunking services** | Not enough data | Not enough data | 
| **Contact Management** | Not enough data | Not enough data | 
| **Communication Management** | Not enough data | Not enough data | 
| **Fax Management** | Not enough data | Not enough data | 
| **Call List Management** | Not enough data | Not enough data | 
| **Call Center Management** | Not enough data | Not enough data | 
| **Queue Management** | Not enough data | Not enough data | 
| **Third-Party Integrations** | Not enough data | Not enough data | 
| **Computer Telephony Integration** | Not enough data | Not enough data | 
| **Real-Time Monitoring** | Not enough data | Not enough data | 
| **Call Monitoring** | Not enough data | Not enough data | 
| **Workflow Management** | Not enough data | Not enough data | 
| **Call Center Integration** | Not enough data | Not enough data | 

#### Basic Communication

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Phone Calls** | 9.5 (39 reviews) ✓ Verified | 9.8 (41 reviews) ✓ Verified | 
| **Video Calls** | 8.1 (24 reviews) | 8.7 (29 reviews) ✓ Verified | 
| **Instant Messaging** | 8.4 (23 reviews) ✓ Verified | 8.2 (34 reviews) ✓ Verified | 
| **Screen Sharing** | 7.9 (21 reviews) | 7.7 (8 reviews) | 
| **Conference Calls** | 9.2 (34 reviews) ✓ Verified | 9.4 (38 reviews) ✓ Verified | 
| **Desk-to-Desk Calls** | 9.0 (36 reviews) ✓ Verified | 9.8 (39 reviews) ✓ Verified | 
| **SMS Messaging** | Not enough data | Not enough data | 
| **Chat/Messaging** | Not enough data | Not enough data | 
| **Video Call Recording** | Not enough data | Not enough data | 
| **Two-Way Audio & Video** | Not enough data | Not enough data | 
| **SIP Trunking** | Not enough data | Not enough data | 

#### Agentic AI - VoIP Providers

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | 
| **Adaptive Learning** | Not enough data | Not enough data | 
| **Proactive Assistance** | Not enough data | Not enough data | 

#### Access

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Software Pairing** | 7.9 (25 reviews) | 7.9 (29 reviews) | 
| **Browser Extension** | 7.9 (23 reviews) ✓ Verified | 7.6 (27 reviews) | 
| **Individual Download** | 7.9 (24 reviews) | 7.3 (25 reviews) ✓ Verified | 

#### Advanced Features

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Hold Music** | 9.1 (35 reviews) ✓ Verified | 9.1 (33 reviews) ✓ Verified | 
| **Automated Attendants** | 9.0 (32 reviews) ✓ Verified | 8.6 (35 reviews) ✓ Verified | 
| **VOiP Number** | 9.0 (33 reviews) ✓ Verified | 9.1 (9 reviews) | 

#### Additional Functionality

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Live Chat** | Not enough data | Not enough data | 
| **Multi-Channel Communication** | Not enough data | Not enough data | 
| **Customizable Reports** | Not enough data | Not enough data | 
| **Call Tracking** | Not enough data | Not enough data | 
| **Automatic Call Distribution** | Not enough data | Not enough data | 
| **Real-Time Data** | Not enough data | Not enough data | 
| **Purchasing & Receiving** | Not enough data | Not enough data | 
| **Employee Directory** | Not enough data | Not enough data | 
| **AI Copilot** | Not enough data | Not enough data | 
| **Activity Tracking** | Not enough data | Not enough data | 
| **Collaboration Tools** | Not enough data | Not enough data | 
| **Call Scripting** | Not enough data | Not enough data | 
| **Real-Time Reporting** | Not enough data | Not enough data | 
| **Call Recording** | Not enough data | Not enough data | 
| **Real-Time Analytics** | Not enough data | Not enough data | 
| **Virtual Call Center** | Not enough data | Not enough data | 
| **Activity Dashboard** | Not enough data | Not enough data | 
| **Reporting & Statistics** | Not enough data | Not enough data | 
| **CRM** | Not enough data | Not enough data | 
| **Auto-Dialer** | Not enough data | Not enough data | 
| **Generative AI** | Not enough data | Not enough data | 
| **Contact Database** | Not enough data | Not enough data | 
| **Call Transfer** | Not enough data | Not enough data | 
| **Call Reporting** | Not enough data | Not enough data | 
| **Call Logging** | Not enough data | Not enough data | 
| **Voice Mail** | Not enough data | Not enough data | 
| **Caller ID** | Not enough data | Not enough data | 
| **Customizable Caller ID** | Not enough data | Not enough data | 
| **Mobile Access** | Not enough data | Not enough data | 
| **Callback Scheduling** | Not enough data | Not enough data | 
| **IVR** | Not enough data | Not enough data | 
| **API** | Not enough data | Not enough data | 
| **Interaction Tracking** | Not enough data | Not enough data | 
| **Call Routing** | Not enough data | Not enough data | 
| **Alerts/Notifications** | Not enough data | Not enough data | 
| **Video Conferencing** | Not enough data | Not enough data | 
| **Call Conferencing** | Not enough data | Not enough data | 
| **Call Disposition** | Not enough data | Not enough data | 
| **Predictive Dialer** | Not enough data | Not enough data | 
| **Spam Blocker** | Not enough data | Not enough data | 
| **On-Demand Recording** | Not enough data | Not enough data | 
| **Caller Profiles** | Not enough data | Not enough data | 
| **Multiple User Accounts** | Not enough data | Not enough data | 
| **VoIP Connection** | Not enough data | Not enough data | 
| **Conferencing** | Not enough data | Not enough data | 
| **Text to Speech** | Not enough data | Not enough data | 
| **Reporting/Analytics** | Not enough data | Not enough data | 
| **VoIP** | Not enough data | Not enough data | 
| **Call Queues** | Not enough data | Not enough data | 
| **Call Screening** | Not enough data | Not enough data | 
| **Access Controls/Permissions** | Not enough data | Not enough data | 
| **Online Voice Transmission** | Not enough data | Not enough data | 
| **Unified Communications** | Not enough data | Not enough data | 
| **Voicemail Transcription** | Not enough data | Not enough data | 

### Audio Conferencing

| Product | Score | Reviews |
|---|---|---|
| **Asterisk** | N/A | N/A |
| **Cisco Unified Communications Manager (CallManager)** | N/A | N/A |

#### Agentic AI - Audio Conferencing

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Proactive Assistance** | Not enough data | Not enough data | 
| **Decision Making** | Not enough data | Not enough data | 

#### Additional Functionality

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Screen Sharing** | Not enough data | Not enough data | 
| **Generative AI** | Not enough data | Not enough data | 
| **Custom Greetings/Messages** | Not enough data | Not enough data | 
| **Mobile Access** | Not enough data | Not enough data | 
| **International Calling** | Not enough data | Not enough data | 
| **Virtual Voicemail** | Not enough data | Not enough data | 
| **Call Scheduling** | Not enough data | Not enough data | 
| **AI Copilot** | Not enough data | Not enough data | 
| **Call Conferencing** | Not enough data | Not enough data | 
| **Reporting/Analytics** | Not enough data | Not enough data | 
| **File Sharing** | Not enough data | Not enough data | 
| **Two Way Audio & Video** | Not enough data | Not enough data | 
| **Audio/Video Recording** | Not enough data | Not enough data | 
| **Real-Time Chat** | Not enough data | Not enough data | 
| **Audio Calls** | Not enough data | Not enough data | 

### UCaaS Platforms

| Product | Score | Reviews |
|---|---|---|
| **Asterisk** | N/A | N/A |
| **Cisco Unified Communications Manager (CallManager)** | N/A | N/A |

#### Agentic AI - UCaaS Platforms

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | 
| **Adaptive Learning** | Not enough data | Not enough data | 
| **Natural Language Interaction** | Not enough data | Not enough data | 
| **Third-Party Integrations** | Not enough data | Not enough data | 

#### Extensions

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Tenancy Flexibility** | Not enough data | Not enough data | 
| **Native VoIP** | Not enough data | Not enough data | 
| **CCaaS Option** | Not enough data | Feature Not Available | 

#### Features

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Voicemail to Email** | Not enough data | Not enough data | 
| **Voicemail to SMS** | Not enough data | Feature Not Available | 
| **File Sharing** | Not enough data | Not enough data | 
| **Voice Conferencing** | Not enough data | Not enough data | 
| **Video Conferencing** | Not enough data | Not enough data | 
| **Conference Transcripts** | Not enough data | Not enough data | 
| **Electronic Faxes** | Not enough data | Not enough data | 
| **IVR** | Not enough data | Not enough data | 
| **Video Call Recording** | Not enough data | Not enough data | 
| **Customizable Reports** | Not enough data | Not enough data | 
| **Real-Time Reporting** | Not enough data | Not enough data | 
| **Meeting Management** | Not enough data | Not enough data | 
| **Screen Sharing** | Not enough data | Not enough data | 
| **Two-Way Audio & Video** | Not enough data | Not enough data | 
| **Virtual Voicemail** | Not enough data | Not enough data | 

#### Additional Functionality

| Feature | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Trend Analysis** | Not enough data | Not enough data | 
| **Generative AI** | Not enough data | Not enough data | 
| **Voice Mail** | Not enough data | Not enough data | 
| **SSL Security** | Not enough data | Not enough data | 
| **Caller ID** | Not enough data | Not enough data | 
| **Multi-Channel Communication** | Not enough data | Not enough data | 
| **Activity Tracking** | Not enough data | Not enough data | 
| **Interaction Tracking** | Not enough data | Not enough data | 
| **Alerts/Notifications** | Not enough data | Not enough data | 
| **Virtual Backgrounds** | Not enough data | Not enough data | 
| **Mobile Access** | Not enough data | Not enough data | 
| **Contact Management** | Not enough data | Not enough data | 
| **Call Center Management** | Not enough data | Not enough data | 
| **Access Controls/Permissions** | Not enough data | Not enough data | 
| **Call Tracking** | Not enough data | Not enough data | 
| **Call Transfer** | Not enough data | Not enough data | 
| **Group Messaging** | Not enough data | Not enough data | 
| **Call Recording** | Not enough data | Not enough data | 
| **AI Copilot** | Not enough data | Not enough data | 
| **Call Monitoring** | Not enough data | Not enough data | 
| **Task Management** | Not enough data | Not enough data | 
| **SMS Messaging** | Not enough data | Not enough data | 
| **Reporting & Statistics** | Not enough data | Not enough data | 
| **Activity Dashboard** | Not enough data | Not enough data | 
| **Call Routing** | Not enough data | Not enough data | 
| **Multi-User Collaboration** | Not enough data | Not enough data | 
| **Single Sign On** | Not enough data | Not enough data | 
| **Chat/Messaging** | Not enough data | Not enough data | 

---
## Categories
**Shared Categories (2):** [VoIP Providers](https://www.g2.com/categories/voip-providers), [UCaaS Platforms](https://www.g2.com/categories/ucaas-platforms)


**Unique to Cisco Unified Communications Manager (CallManager) (1):** [Audio Conferencing Software](https://www.g2.com/categories/audio-conferencing)


---
## Reviewer Demographics

### By Company Size

| Segment | Asterisk | Cisco Unified Communications Manager (CallManager) | 
|---|---|---|
| **Small-Business** | 30.8% | 6.7% | 
| **Mid-Market** | 50.0% | 50.0% | 
| **Enterprise** | 19.2% | 43.3% | 

### By Industry

#### Asterisk

- **Telecommunications:** 28.8%
- **Information Technology and Services:** 21.2%
- **Banking:** 5.8%
- **Computer Software:** 5.8%
- **Accounting:** 3.8%
- **Computer & Network Security:** 3.8%
- **Facilities Services:** 3.8%
- **Broadcast Media:** 1.9%
- **Computer Networking:** 1.9%
- **Consumer Goods:** 1.9%
- **Other:** 21.2%

#### Cisco Unified Communications Manager (CallManager)

- **Higher Education:** 15.4%
- **Information Technology and Services:** 13.5%
- **Computer Software:** 7.7%
- **Government Administration:** 4.8%
- **Telecommunications:** 4.8%
- **Insurance:** 4.8%
- **Hospital & Health Care:** 3.8%
- **Oil & Energy:** 3.8%
- **Banking:** 2.9%
- **Machinery:** 2.9%
- **Other:** 35.6%

---
## Alternatives

### Alternatives to Asterisk

- [3CX](https://www.g2.com/products/3cx/reviews) — 4.4/5 stars (548 reviews)
- [RingEX](https://www.g2.com/products/ringex/reviews) — 4.2/5 stars (1472 reviews)
- [Zoom Workplace](https://www.g2.com/products/zoom-workplace/reviews) — 4.5/5 stars (56619 reviews)
- [Webex Calling](https://www.g2.com/products/webex-calling/reviews) — 4.5/5 stars (638 reviews)
- [GoTo Connect](https://www.g2.com/products/goto-connect/reviews) — 4.4/5 stars (1422 reviews)
- [Dialpad Connect](https://www.g2.com/products/dialpad-connect/reviews) — 4.4/5 stars (4214 reviews)
- [Yeastar S-Series VoIP PBX](https://www.g2.com/products/yeastar-s-series-voip-pbx/reviews) — 4.9/5 stars (15 reviews)
- [Linphone](https://www.g2.com/products/linphone/reviews) — 4.4/5 stars (16 reviews)
- [Twilio Flex](https://www.g2.com/products/twilio-twilio-flex/reviews) — 4.1/5 stars (37 reviews)
- [Aircall](https://www.g2.com/products/aircall/reviews) — 4.4/5 stars (1664 reviews)

### Alternatives to Cisco Unified Communications Manager (CallManager)

- [Genesys Cloud CX](https://www.g2.com/products/genesys-cloud-cx/reviews) — 4.4/5 stars (1571 reviews)
- [RingEX](https://www.g2.com/products/ringex/reviews) — 4.2/5 stars (1472 reviews)
- [3CX](https://www.g2.com/products/3cx/reviews) — 4.4/5 stars (548 reviews)
- [Vonage Business Communications](https://www.g2.com/products/vonage-business-communications/reviews) — 4.3/5 stars (504 reviews)
- [GoTo Connect](https://www.g2.com/products/goto-connect/reviews) — 4.4/5 stars (1422 reviews)
- [Zoom Workplace](https://www.g2.com/products/zoom-workplace/reviews) — 4.5/5 stars (56619 reviews)
- [Twilio](https://www.g2.com/products/twilio/reviews) — 4.1/5 stars (529 reviews)
- [Dialpad Connect](https://www.g2.com/products/dialpad-connect/reviews) — 4.4/5 stars (4214 reviews)
- [Nextiva](https://www.g2.com/products/nextiva/reviews) — 4.5/5 stars (3652 reviews)
- [Aircall](https://www.g2.com/products/aircall/reviews) — 4.4/5 stars (1664 reviews)

---
## Top Discussions

### Asterisk

No discussions available for this product.

### Cisco Unified Communications Manager (CallManager)

No discussions available for this product.

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/asterisk-vs-cisco-unified-communications-manager-callmanager)