# Cisco Unified Communications Manager (CallManager) vs Twilio Comparison
---
## AI Generated Summary
- **G2 reviewers report** that Cisco Unified Communications Manager (CallManager) excels in providing a **secure and stable collaboration platform** , particularly for organizations that require a local datacenter solution. Users appreciate its ability to support a wide range of audio and video devices, making it ideal for closed networks without internet access.
- **Users say** Twilio stands out for its **reliability and ease of integration** , especially for developers looking to incorporate messaging and calling features into their applications. Reviewers highlight the smooth setup process and well-documented APIs, which facilitate quick implementation of SMS and notification services.
- **According to verified reviews** , Cisco Unified Communications Manager (CallManager) is praised for its **robust handling of unified endpoints** , such as Cisco phones and video devices. Users note that it can be integrated with other Cisco products, like Unity Connection for voicemail, enhancing its functionality in enterprise environments.
- **Reviewers mention** that Twilio's user-friendly interface makes it the **best SMS platform for marketing** , with many users finding it easy to navigate and utilize for their campaigns. This accessibility is a significant advantage for small businesses looking to leverage SMS marketing without extensive technical knowledge.
- **G2 reviewers highlight** that while Cisco Unified Communications Manager (CallManager) has a slight learning curve, its **stability and performance** are unmatched in the PBX market. Users who have supported the platform for years commend its reliability, making it a trusted choice for larger organizations.
- **Users report** that Twilio's scalability is a major benefit, allowing businesses to grow their communication capabilities seamlessly. The platform's **easy API integration** is frequently mentioned as a key feature that enables rapid deployment of communication tools, making it a favorite among small to mid-sized businesses.



| | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Star Rating** | 4.4 out of 5 | 4.1 out of 5 | 
| **Total Reviews** | 111 | 526 | 
| **Largest Market Segment** | Mid-Market (50.0% of reviews) | Small-Business (51.9% of reviews) | 
| **Entry Level Price** | No pricing available | No pricing available | 

---
## Top Pros & Cons

### Cisco Unified Communications Manager (CallManager)

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

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

### Twilio

Pros:
- Ease of Use (40 reviews)
- Easy Integrations (30 reviews)

Cons:
- Expensive (26 reviews)
- Poor Customer Support (23 reviews)

---
## Ratings Comparison
| Rating | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
  | **Meets Requirements** | 9.1 (91 reviews) | 8.7 (379 reviews) | 
  | **Ease of Use** | 8.1 (92 reviews) | 8.1 (390 reviews) | 
  | **Ease of Setup** | 6.9 (52 reviews) | 7.6 (229 reviews) | 
  | **Ease of Admin** | 8.0 (54 reviews) | 7.9 (199 reviews) | 
  | **Quality of Support** | 8.6 (87 reviews) | 7.8 (345 reviews) | 
  | **Has the product been a good partner in doing business?** | 8.7 (53 reviews) | 8.0 (190 reviews) | 
  | **Product Direction (% positive)** | 8.4 (90 reviews) | 8.3 (366 reviews) | 

---
## Pricing

### Cisco Unified Communications Manager (CallManager)

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

### Twilio

#### Entry-Level Pricing

No pricing available

#### Free Trial

Yes

---
## Features Comparison By Category

### SMS Marketing

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

#### Text Messaging

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Bulk SMS** | Not enough data | Not enough data | 
| **Two-Way Text Messaging** | Not enough data | Not enough data | 
| **Text Scheduler** | Not enough data | Not enough data | 
| **Automatic Replies** | Not enough data | Not enough data | 
| **Automatic URL Shortening** | Not enough data | Not enough data | 
| **MMS Marketing** | Not enough data | Not enough data | 
| **Personalization** | Not enough data | Not enough data | 
| **Transactional SMS** | Not enough data | Not enough data | 

#### SMS Platform

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Reporting** | Not enough data | Not enough data | 
| **Automation** | Not enough data | Not enough data | 
| **White Label** | Not enough data | Not enough data | 
| **Text-to-Landline** | Not enough data | Not enough data | 
| **Short Codes** | Not enough data | Not enough data | 
| **API Integration** | Not enough data | Not enough data | 

#### Agentic AI - SMS Marketing

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Multi-step Planning** | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | 
| **Natural Language Interaction** | Not enough data | Not enough data | 
| **Proactive Assistance** | Not enough data | Not enough data | 
| **Decision Making** | Not enough data | Not enough data | 

### Communication Platform as a Service (CPaaS)

| Product | Score | Reviews |
|---|---|---|
| **Cisco Unified Communications Manager (CallManager)** | N/A | N/A |
| **Twilio** | 7.8/10 | 137 |

#### Functionality

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Ease Of Integration** | Not enough data | 8.1 (119 reviews) ✓ Verified | 
| **API Call Speed** | Not enough data | 8.3 (104 reviews) ✓ Verified | 
| **Communication Varieties** | Not enough data | 8.4 (115 reviews) ✓ Verified | 

#### Support

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Documentation** | Not enough data | 7.6 (109 reviews) ✓ Verified | 
| **Community Support** | Not enough data | Feature Not Available | 
| **Professional Support** | Not enough data | 6.7 (115 reviews) ✓ Verified | 

### Video Platform as a Service (VPaaS)

| Product | Score | Reviews |
|---|---|---|
| **Cisco Unified Communications Manager (CallManager)** | N/A | N/A |
| **Twilio** | 6.9/10 | 15 |

#### API Features

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Live Chat** | Not enough data | 6.7 (12 reviews) | 
| **Screen Sharing** | Not enough data | 6.7 (12 reviews) | 
| **Subtitles and Closed Captions** | Not enough data | 6.7 (13 reviews) | 
| **Custom Video Player** | Not enough data | 7.3 (11 reviews) | 
| **Live Simulcasting** | Not enough data | 7.0 (11 reviews) | 

#### Security and Compliance

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Encryption** | Not enough data | 6.5 (11 reviews) | 
| **Watermarking** | Not enough data | 6.7 (11 reviews) | 
| **HIPAA Compliance** | Not enough data | 7.2 (13 reviews) | 
| **GDPR Compliance** | Not enough data | 7.3 (11 reviews) | 

### Cloud PBX Platforms

| Product | Score | Reviews |
|---|---|---|
| **Cisco Unified Communications Manager (CallManager)** | N/A | N/A |
| **Twilio** | 4.9/10 | 5 |

#### Basic Communication - Cloud PBX

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Call Management** | Not enough data | 4.7 (5 reviews) | 
| **Communication Management** | Not enough data | 5.0 (5 reviews) | 
| **Scalability** | Not enough data | 5.0 (5 reviews) | 
| **Integrations** | Not enough data | 5.7 (5 reviews) | 
| **Mobile Accessibility** | Not enough data | 5.3 (5 reviews) | 
| **Accessibility** | Not enough data | 5.3 (5 reviews) | 

#### Advanced Features - Cloud PBX

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Security and Compliance** | Not enough data | 4.7 (5 reviews) | 
| **Analytics and Reporting** | Not enough data | 4.3 (5 reviews) | 
| **Support and Reliability** | Not enough data | 3.7 (5 reviews) | 
| **Automated attendant** | Not enough data | 5.0 (5 reviews) | 

### WhatsApp Marketing

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

#### WhatsApp Messaging - WhatsApp Marketing

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Transactional Messages** | Not enough data | Not enough data | 
| **Bulk WhatsApp Messaging** | Not enough data | Not enough data | 
| **Conversational Messaging** | Not enough data | Not enough data | 
| **Personalization** | Not enough data | Not enough data | 
| **Promotional Messages** | Not enough data | Not enough data | 
| **Automated Replies** | Not enough data | Not enough data | 

#### WhatsApp Business Platform - WhatsApp Marketing

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Segmentation** | Not enough data | Not enough data | 
| **API Integration** | Not enough data | Not enough data | 
| **WhatsApp Commerce** | Not enough data | Not enough data | 
| **Analytics** | Not enough data | Not enough data | 

### VoIP Providers

| Product | Score | Reviews |
|---|---|---|
| **Cisco Unified Communications Manager (CallManager)** | 8.6/10 | 46 |
| **Twilio** | 9.7/10 | 6 |

#### Platform Basics - VoIP Providers

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **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 | 

#### Basic Communication

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Phone Calls** | 9.8 (41 reviews) ✓ Verified | 9.7 (5 reviews) | 
| **Video Calls** | 8.7 (29 reviews) ✓ Verified | Not enough data | 
| **Instant Messaging** | 8.2 (34 reviews) ✓ Verified | Not enough data | 
| **Screen Sharing** | 7.7 (8 reviews) | Not enough data | 
| **Conference Calls** | 9.4 (38 reviews) ✓ Verified | Not enough data | 
| **Desk-to-Desk Calls** | 9.8 (39 reviews) ✓ Verified | Not enough data | 

#### Agentic AI - VoIP Providers

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **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 | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Software Pairing** | 7.9 (29 reviews) | Not enough data | 
| **Browser Extension** | 7.6 (27 reviews) | Not enough data | 
| **Individual Download** | 7.3 (25 reviews) ✓ Verified | Not enough data | 

#### Advanced Features

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Hold Music** | 9.1 (33 reviews) ✓ Verified | Not enough data | 
| **Automated Attendants** | 8.6 (35 reviews) ✓ Verified | Not enough data | 
| **VOiP Number** | 9.1 (9 reviews) | Not enough data | 

### Audio Conferencing

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

#### Agentic AI - Audio Conferencing

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

### UCaaS Platforms

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

#### Agentic AI - UCaaS Platforms

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **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 | 

#### Extensions

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

#### Features

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Voicemail to Email** | Not enough data | Not enough data | 
| **Voicemail to SMS** | Feature Not Available | Not enough data | 
| **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 | 

### RCS Business Messaging

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

#### Messaging - RCS Business Messaging

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Personalization** | Not enough data | Not enough data | 
| **Rich Media** | Not enough data | Not enough data | 
| **Interactive Messages** | Not enough data | Not enough data | 
| **Branded Templates** | Not enough data | Not enough data | 
| **Automation** | Not enough data | Not enough data | 
| **Conversational RCS** | Not enough data | Not enough data | 
| **Transactional RCS** | Not enough data | Not enough data | 
| **Promotional RCS** | Not enough data | Not enough data | 

#### Security / Verification - RCS Business Messaging

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Verified Sender** | Not enough data | Not enough data | 
| **Encryption** | Not enough data | Not enough data | 
| **Authentification** | Not enough data | Not enough data | 

#### Analytics / Deliverability - RCS Business Messaging

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Read Receipts** | Not enough data | Not enough data | 
| **Analytics** | Not enough data | Not enough data | 
| **SMS Fallback** | Not enough data | Not enough data | 

#### AI - RCS Business Messaging

| Feature | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **AI** | Not enough data | Not enough data | 

---
## Categories
**Shared Categories (1):** [VoIP Providers](https://www.g2.com/categories/voip-providers)

**Unique to Cisco Unified Communications Manager (CallManager) (2):** [UCaaS Platforms](https://www.g2.com/categories/ucaas-platforms), [Audio Conferencing Software](https://www.g2.com/categories/audio-conferencing)

**Unique to Twilio (6):** [ RCS Business Messaging Software](https://www.g2.com/categories/rcs-business-messaging), [WhatsApp Marketing Software](https://www.g2.com/categories/whatsapp-marketing), [Cloud PBX Platforms Software](https://www.g2.com/categories/cloud-pbx-platforms), [Video Platform as a Service (VPaaS) Software](https://www.g2.com/categories/video-platform-as-a-service-vpaas), [SMS Marketing Software](https://www.g2.com/categories/sms-marketing), [Communication Platform as a Service (cPaaS) Platforms](https://www.g2.com/categories/communication-platform-as-a-service-cpaas)


---
## Reviewer Demographics

### By Company Size

| Segment | Cisco Unified Communications Manager (CallManager) | Twilio | 
|---|---|---|
| **Small-Business** | 6.7% | 51.9% | 
| **Mid-Market** | 50.0% | 29.8% | 
| **Enterprise** | 43.3% | 18.3% | 

### By Industry

#### 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%

#### Twilio

- **Computer Software:** 17.2%
- **Information Technology and Services:** 11.2%
- **Marketing and Advertising:** 7.2%
- **Financial Services:** 5.1%
- **Internet:** 4.7%
- **Health, Wellness and Fitness:** 4.7%
- **Telecommunications:** 3.8%
- **Real Estate:** 2.9%
- **Hospital & Health Care:** 2.5%
- **Non-Profit Organization Management:** 2.5%
- **Other:** 38.3%

---
## Alternatives

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

- [Genesys Cloud CX](https://www.g2.com/products/genesys-cloud-cx/reviews) — 4.4/5 stars (1555 reviews)
- [RingEX](https://www.g2.com/products/ringex/reviews) — 4.2/5 stars (1403 reviews)
- [3CX](https://www.g2.com/products/3cx/reviews) — 4.4/5 stars (547 reviews)
- [Mitel](https://www.g2.com/products/mitel/reviews) — 3.8/5 stars (235 reviews)
- [Vonage Business Communications](https://www.g2.com/products/vonage-business-communications/reviews) — 4.3/5 stars (504 reviews)
- [Asterisk](https://www.g2.com/products/asterisk/reviews) — 4.6/5 stars (59 reviews)
- [GoTo Connect](https://www.g2.com/products/goto-connect/reviews) — 4.4/5 stars (1415 reviews)
- [Zoom Workplace](https://www.g2.com/products/zoom-workplace/reviews) — 4.5/5 stars (56483 reviews)
- [Dialpad Connect](https://www.g2.com/products/dialpad-connect/reviews) — 4.4/5 stars (4195 reviews)
- [Nextiva](https://www.g2.com/products/nextiva/reviews) — 4.5/5 stars (3582 reviews)

### Alternatives to Twilio

- [Plivo](https://www.g2.com/products/plivo/reviews) — 4.5/5 stars (747 reviews)
- [MSG91](https://www.g2.com/products/msg91/reviews) — 4.5/5 stars (199 reviews)
- [Vonage Communications APIs](https://www.g2.com/products/vonage-communications-apis/reviews) — 4.2/5 stars (404 reviews)
- [Podium](https://www.g2.com/products/podium/reviews) — 4.5/5 stars (2107 reviews)
- [Telnyx CPaaS](https://www.g2.com/products/telnyx-cpaas/reviews) — 4.7/5 stars (525 reviews)
- [Bandwidth](https://www.g2.com/products/bandwidth-bandwidth/reviews) — 4.4/5 stars (504 reviews)
- [Wati](https://www.g2.com/products/wati/reviews) — 4.6/5 stars (494 reviews)
- [3CX](https://www.g2.com/products/3cx/reviews) — 4.4/5 stars (547 reviews)
- [Bird](https://www.g2.com/products/messagebird-bird/reviews) — 3.9/5 stars (73 reviews)
- [Infobip](https://www.g2.com/products/infobip/reviews) — 4.3/5 stars (58 reviews)

---
## Top Discussions

### Cisco Unified Communications Manager (CallManager)

No discussions available for this product.

### Twilio

- Title: [Is it possible to do automated skype message using twilio](https://www.g2.com/discussions/is-it-possible-to-do-automated-skype-message-using-twilio) — 2 comments, 1 upvote
  > **Top comment:** "There's no specific API for sending Skype messages, like there is for WhatsApp for example, BUT you could use the Programmable SMS API to send an SMS to a..."
- Title: [What is Twilio used for?](https://www.g2.com/discussions/what-is-twilio-used-for) — 1 comment
  > **Top comment:** "As a Whatsapp Business provider"
- Title: [Is twilio reliable?](https://www.g2.com/discussions/is-twilio-reliable) — 1 comment
  > **Top comment:** "Never had an issue in more than 3 years using it that impacted my business in a significative way"
- Title: [What is the use of twilio?](https://www.g2.com/discussions/what-is-the-use-of-twilio) — 1 comment
  > **Top comment:** "using Twilio as one of my cloud pabx alternatives."

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