# OpenText Core Fax vs Yeastar S-Series VoIP PBX Comparison | | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Star Rating** | 4.5 out of 5 | 4.9 out of 5 | | **Total Reviews** | 53 | 15 | | **Largest Market Segment** | Mid-Market (45.7% of reviews) | Small-Business (87.5% of reviews) | | **Entry Level Price** | No pricing available | No pricing available | --- ## Ratings Comparison | Rating | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Meets Requirements** | 9.4 (38 reviews) | Not enough data | | **Ease of Use** | 9.2 (37 reviews) | Not enough data | | **Ease of Setup** | 8.6 (34 reviews) | Not enough data | | **Ease of Admin** | 8.6 (35 reviews) | Not enough data | | **Quality of Support** | 9.0 (36 reviews) | Not enough data | | **Has the product been a good partner in doing business?** | 9.1 (34 reviews) | Not enough data | | **Product Direction (% positive)** | 8.7 (37 reviews) | Not enough data | --- ## Pricing ### OpenText Core Fax #### Entry-Level Pricing No pricing available #### Free Trial Yes ### Yeastar S-Series VoIP PBX #### Entry-Level Pricing No pricing available #### Free Trial No information available --- ## Features Comparison By Category ### Online Fax | Product | Score | Reviews | |---|---|---| | **OpenText Core Fax** | 9.2/10 | 29 | | **Yeastar S-Series VoIP PBX** | N/A | N/A | #### Documents | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Editing** | 9.0 (13 reviews) | Not enough data | | **Document Signature ** | Feature Not Available | Not enough data | | **Storage** | 9.4 (17 reviews) | Not enough data | #### Agentic AI - Online Fax | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | #### Sending | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Fax Number** | 9.4 (19 reviews) | Not enough data | | **Existing Numbers** | 9.7 (20 reviews) | Not enough data | | **Cross-Platform Sending** | 9.3 (20 reviews) | Not enough data | | **Unlimited Sending** | 9.3 (19 reviews) | Not enough data | | **Contact Management** | 8.4 (17 reviews) | Not enough data | | **Alerts** | 9.1 (20 reviews) | Not enough data | ### Cloud PBX Platforms | Product | Score | Reviews | |---|---|---| | **OpenText Core Fax** | N/A | N/A | | **Yeastar S-Series VoIP PBX** | N/A | N/A | #### Basic Communication - Cloud PBX | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Call Management** | Not enough data | Not enough data | | **Communication Management** | Not enough data | Not enough data | | **Scalability** | Not enough data | Not enough data | | **Integrations** | Not enough data | Not enough data | | **Mobile Accessibility** | Not enough data | Not enough data | | **Accessibility** | Not enough data | Not enough data | #### Advanced Features - Cloud PBX | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Security and Compliance** | Not enough data | Not enough data | | **Analytics and Reporting** | Not enough data | Not enough data | | **Support and Reliability** | Not enough data | Not enough data | | **Automated attendant** | Not enough data | Not enough data | ### VoIP Providers | Product | Score | Reviews | |---|---|---| | **OpenText Core Fax** | N/A | N/A | | **Yeastar S-Series VoIP PBX** | N/A | N/A | #### Platform Basics - VoIP Providers | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **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 | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Phone Calls** | Not enough data | Not enough data | | **Video Calls** | Not enough data | Not enough data | | **Instant Messaging** | Not enough data | Not enough data | | **Screen Sharing** | Not enough data | Feature Not Available | | **Conference Calls** | Not enough data | Not enough data | | **Desk-to-Desk Calls** | Not enough data | Not enough data | #### Agentic AI - VoIP Providers | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **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 | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Software Pairing** | Not enough data | Not enough data | | **Browser Extension** | Not enough data | Not enough data | | **Individual Download** | Not enough data | Not enough data | #### Advanced Features | Feature | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Hold Music** | Not enough data | Not enough data | | **Automated Attendants** | Not enough data | Not enough data | | **VOiP Number** | Not enough data | Not enough data | --- ## Categories **Unique to OpenText Core Fax (1):** [Online Fax Software](https://www.g2.com/categories/online-fax) **Unique to Yeastar S-Series VoIP PBX (2):** [VoIP Providers](https://www.g2.com/categories/voip-providers), [Cloud PBX Platforms Software](https://www.g2.com/categories/cloud-pbx-platforms) --- ## Reviewer Demographics ### By Company Size | Segment | OpenText Core Fax | Yeastar S-Series VoIP PBX | |---|---|---| | **Small-Business** | 15.2% | 87.5% | | **Mid-Market** | 45.7% | 12.5% | | **Enterprise** | 39.1% | 0% | ### By Industry #### OpenText Core Fax - **Higher Education:** 17.4% - **Information Technology and Services:** 10.9% - **Hospital & Health Care:** 8.7% - **Government Administration:** 8.7% - **Financial Services:** 6.5% - **Automotive:** 4.3% - **Banking:** 4.3% - **Health, Wellness and Fitness:** 4.3% - **Education Management:** 4.3% - **Accounting:** 2.2% - **Other:** 28.3% #### Yeastar S-Series VoIP PBX - **Telecommunications:** 28.6% - **Medical Practice:** 14.3% - **Machinery:** 14.3% - **Dairy:** 14.3% - **Automotive:** 14.3% - **Architecture & Planning:** 14.3% --- ## Alternatives ### Alternatives to OpenText Core Fax - [Documo](https://www.g2.com/products/documo/reviews) — 4.6/5 stars (225 reviews) - [HelloFax](https://www.g2.com/products/hellofax/reviews) — 4.5/5 stars (57 reviews) - [CocoFax](https://www.g2.com/products/cocofax/reviews) — 4.6/5 stars (188 reviews) - [iFax](https://www.g2.com/products/ifax/reviews) — 4.7/5 stars (480 reviews) - [RingEX](https://www.g2.com/products/ringex/reviews) — 4.2/5 stars (1421 reviews) - [GoTo Connect](https://www.g2.com/products/goto-connect/reviews) — 4.4/5 stars (1415 reviews) - [eFax Online Fax Service](https://www.g2.com/products/efax-online-fax-service/reviews) — 4.4/5 stars (204 reviews) - [Upland InterFAX](https://www.g2.com/products/upland-interfax/reviews) — 4.6/5 stars (157 reviews) - [Fax.Plus](https://www.g2.com/products/alohi-fax-plus/reviews) — 4.6/5 stars (60 reviews) - [WestFax](https://www.g2.com/products/westfax/reviews) — 4.8/5 stars (31 reviews) ### Alternatives to Yeastar S-Series VoIP PBX - [3CX](https://www.g2.com/products/3cx/reviews) — 4.4/5 stars (547 reviews) - [Asterisk](https://www.g2.com/products/asterisk/reviews) — 4.6/5 stars (59 reviews) - [Webex Calling](https://www.g2.com/products/webex-calling/reviews) — 4.5/5 stars (634 reviews) - [Cisco Unified Communications Manager (CallManager)](https://www.g2.com/products/cisco-unified-communications-manager-callmanager/reviews) — 4.4/5 stars (111 reviews) - [Genesys Cloud CX](https://www.g2.com/products/genesys-cloud-cx/reviews) — 4.4/5 stars (1558 reviews) - [Nextiva](https://www.g2.com/products/nextiva/reviews) — 4.5/5 stars (3607 reviews) - [GoTo Connect](https://www.g2.com/products/goto-connect/reviews) — 4.4/5 stars (1415 reviews) - [RingEX](https://www.g2.com/products/ringex/reviews) — 4.2/5 stars (1421 reviews) - [Aircall](https://www.g2.com/products/aircall/reviews) — 4.4/5 stars (1636 reviews) - [Vonage Business Communications](https://www.g2.com/products/vonage-business-communications/reviews) — 4.3/5 stars (503 reviews) --- ## Top Discussions ### OpenText Core Fax - Title: [Is MAC on the roadmap for the Xmedius App?](https://www.g2.com/discussions/29972-is-mac-on-the-roadmap-for-the-xmedius-app) — 2 comments *(includes official response)* > **Top comment:** "Comment deleted by user." ### Yeastar S-Series VoIP PBX - Title: [What is Yeastar S20?](https://www.g2.com/discussions/what-is-yeastar-s20) — 1 comment > **Top comment:** "It is a cloud-based phone system for small companies. Don't need phone service, just internet. Office phone on the desk, different extensions, etc. but..." - Title: [would you please make Linkus resizeable for split screen use on androids?](https://www.g2.com/discussions/would-you-please-make-linkus-resizeable-for-split-screen-use-on-androids) — 1 comment, 1 upvote > **Top comment:** "Comment deleted by user." - Title: [How to register an IP phone or softphone to S-Series VoIP PBX?](https://www.g2.com/discussions/how-to-register-an-ip-phone-or-softphone-to-s-series-voip-pbx) — 1 comment, 1 upvote *(includes official response)* > **Top comment:** "S-Series VoIP PBX have passed compatibility test with lots of IP phone brands, such as Yealink, Grandstream, Cisco, Polycom, Snom, etc. Any questions about..." --- **Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/opentext-core-fax-vs-yeastar-s-series-voip-pbx)