Difference between revisions of "Webconferencing software"

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[[Webconferencing software]] (hereinafter, the ''Software'') is a software application or system that supports [[webconferencing]]. The ''Software'' is often called ''[[videoconferencing software]]''; however, [[videoconferencing]] may occur outside the [[Internet]].
+
[[Webconferencing software]] (also known as [[web conferencing software]], particularly, [[web conferencing system]], [[webconferencing system]], [[webconferencing platform]], or, more broadly, [[conferencing platform]]; hereinafter, the ''Software'') is [[software]], a [[software application]], or [[software system]] that supports [[webconferencing]] including just audio conferencing and audiovisual conferencing conducted over the [[Internet]].
  
==Comparison of applications==
+
[[Videoconferencing software]] is a subset of the ''Software'' since [[videoconferencing]] may not necessarily include video. For instance, [[webconferencing]] can be conducted using phone calls only.
Skype For Business, GoToMeeting, Zoom, Adobe Connect, and Google hangouts
 
  
  
== Comparison chart ==
+
==Features==
 +
Chat support, desktop sharing support, recording capabilities
  
{|class="wikitable" width=100% style="text-align:center;"
+
==Comparison of proprietary applications==
 +
:{|class="wikitable" width=100% style="text-align:center;"
 
|-
 
|-
 
!Application
 
!Application
Line 13: Line 14:
 
!Capacity
 
!Capacity
 
![[OS]]
 
![[OS]]
! Audio Support
+
!Video
[[Image:Stock volume.svg|25px|Audio Support]]
+
!Whiteboard
! Video Quality
+
!Upload
! Video Support
+
!Co-browsing
! Chat Support
+
!Mobile Device Support
! Desktop Sharing Support
+
!Break-out Sessions
! Whiteboard
+
!Security Access
! Upload PPT
+
!Encrypted communication
! Upload PDF
+
!Host from Mobile  
! Upload Doc / DocX
+
!Attend from Mobile
! Co-browsing
+
!Cloud-based no download
! Mobile Device Support
+
!VoIP
! Break-Out Sessions
+
!Embeddable
! Security Access
+
!Dial-in by phone
! Encrypted communication
 
! Host meeting from Mobile
 
! Attend meeting from Mobile
 
! Cloud Based no download
 
! Recording capabilities
 
! VoIP
 
! Embeddable
 
! Dial in by phone
 
|-
 
| {{rh}} | [[Adobe Connect]]
 
| {{Proprietary}}
 
| {{Sort|0000500|1-1500 (80 000 w/webcast)}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}<ref group=note name="ReferenceA">Supports two-way teleconference integration</ref>
 
| {{Yes|VGA, HQ, HD}}<ref>{{cite web|url=https://www.adobe.com/products/adobeconnect/feature-details/podium-hd-pod.html |title=Podium HD Pod |author=Adobe |publisher=Adobe |date=2012-01-11 |accessdate=2014-02-27}}</ref>{{failed verification|date=September 2015}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}<ref group=note name="ReferenceB">Linux users may only view another user's desktop</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|✓}}
 
| {{Yes|✓}}<ref group=note name="ReferenceC">Yes, but only via a screen-sharing "pod" with control permissions granted</ref>
 
| {{Yes|✓ iPhone, iPad, and Android}}<ref>{{cite web|url=https://www.adobe.com/products/adobeconnect/apps.html |title=Adobe Connect Mobile |author=Adobe |publisher=Adobe |accessdate=18 September 2015}}</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}iOS, Android and RIM
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}<ref>Designed for VOIP; requires additional service to support phone. See URL https://helpx.adobe.com/adobe-connect/kb/audio-choices-connect.html</ref>
 
| {{Yes|✓}}
 
 
|-
 
|-
| {{rh}} | [[AT&T|AT&T Connect]]
+
|[[Adobe Connect]]
| {{Proprietary}}
+
|[[Proprietary]]
| {{Sort|0000500|1-1500}}
+
|<1500 (80&nbsp;000 w/webcast)
| {{Yes|✓}}<ref group=note>web based client without the ability to share</ref>
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]], [[HQ]], [[HD]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|[[PPT]], [[PDF]]
| {{Yes|HQ}}
+
|Yes
| {{Yes|✓}}
+
|[[iPhone]], [[iPad]], [[Android]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|[[iOS]], [[Android]], [[RIM]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|iOS, Android, RIM and Windows Phone}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
 
|-
 
|-
| {{rh}} | [[AnyMeeting]]
+
|[[BigBlueButton]]
| {{Proprietary}}
+
|[[LGPL]], [[GPL]]
| {{Sort|0000500|1-200}}
+
|<80
| {{No|X}}<ref>{{cite web|url=http://support.anymeeting.com/customer/portal/articles/1191571-presenter---frequently-asked-questions |author=AnyMeeting |publisher=AnyMeeting |title=Presenter - Frequently Asked Questions |date=2013-11-22 |accessdate= 2014-02-27}}</ref>
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]], [[HQ]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|[[PPT]], [[PDF]], [[DocX]]
| {{Yes|}}HQ
+
|No
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|No
| {{Yes|✓}}
+
|Coming soon
| {{Yes|✓}}
+
|[[Android]]
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|Yes
| {{Yes|✓ iPad and Android Tablets}}<ref>{{cite web|url=http://blog.anymeeting.com/press-releases/anymeeting-rolls-out-new-mobile-apps-for-ipad-and-android/|author=chrisb|publisher=AnyMeeting |title=AnyMeeting Rolls Out New Mobile Apps for iPad and Android |date=23 April 2013 |accessdate=18 September 2015}}</ref>
+
|Yes
| {{No|X}}
+
| Unknown
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|iOS and Android Tablets}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
 
|-
 
|-
| {{rh}} | [[Attentiv]]
+
|[[WebEx|Cisco WebEx]]
| {{Proprietary}}
+
|[[Proprietary]]
| {{Sort|0000500|1-1000}}
+
|<3000
| {{Yes|✓}}<ref>[http://www.fastcompany.com/3044872/work-smart/a-new-meeting-platform-aims-to-help-introverts-get-their-ideas-heard/ A New Meeting Platform Aims to Help Introverts get Their Ideas Heard]. FastCompany.com (2015-04-10). Retrieved on 2015-04-13.</ref>
+
|[[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]], [[HQ]], [[HD]]
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|[[PPT]], [[PDF]], [[DocX]]
| {{No|X}}
+
|Yes
| {{No|X}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|256-bit AES,PKI, End-to-end (Transport layer: 128-bit
| {{Yes|✓}}
+
SSLv3)
| {{Yes|✓}}
+
|[[iOS]], [[Android]], [[BlackBerry]]
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|Yes
| {{Yes|✓ iPad and Android}}<ref name=Attentiv>{{Citation | title = Getting Started With Attentiv | url = http://attentiv.com/getting-started-with-attentiv/ | author = Russell, Daniel | accessdate = 2015-11-23}}</ref>
+
|Yes
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
 
| {{Yes|iOS and Android}}<ref name=Attentiv/>
 
| {{Yes|iOS and Android}}<ref name=Attentiv/>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Unknown}}
 
 
|-
 
|-
| {{rh}} | [[BigBlueButton]]
+
|[[GoToMeeting|LogMeIn GotoMeeting]]
| {{free|[[LGPL]], [[GPL]]}}
+
|[[Proprietary]]
| {{Sort|0000080|1-80<ref>{{cite web|last=Dixon|first=Fred |title=Audio stress Test: Results |url=https://groups.google.com/group/bigbluebutton-dev/browse_thread/thread/3c7ce9815a9800c3 |website=Google Groups |accessdate=6 June 2012}}</ref>{{self-published source|date=September 2015}} }}
+
|<1000
| {{Yes|✓}}
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]], [[HD]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|No (available only in GoToTraining)
| {{Yes|}}VGA,HQ
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes (with reduced features)
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
| Unknown
| {{Yes|✓}}
+
| Unknown
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|-  
| {{No|X}}
+
|[[G Suite#Hangouts Meet|Google Meet]]
| {{Coming Soon}}
+
|[[Proprietary]]
| {{Yes|✓ Android only}}
+
|<25 (30 for GSuite users)
| {{Yes}}
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[HD]]  
| {{Yes}}
+
|No
| {{Yes}}
+
|[[PPT]], [[PDF]], [[DocX]]
| {{Unknown}}
+
|No
|-
+
|Yes
| {{rh}} | [[WebEx|Cisco WebEx]]
+
|No
| {{Proprietary}}
+
|Yes
| {{Sort|0003000|1-3000}}
+
|Yes
| {{Partial}}<ref name="webex support on Linux">{{cite web|url=https://opensource.com/webcast/webcast-support-64-bit-linux-systems |title=Webex support on Linux |website=opensource.com |date=2015-01-06 |access-date=2015-01-06}}</ref><ref name="webex on 64 bit linux">{{cite web|url=http://www.emsperformance.net/2013/03/25/making-webex-work-on-64bit-fedora-core-18/ |title= Webex on 64 bit linux |website=Emsperformance.net |date=2013-03-25 |accessdate= 2014-02-27}}</ref>
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Unknown
| {{Yes|VGA, HQ, HD}}
+
|Unknown
| {{Yes|✓}}
+
|Enterprise Edition only
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓ 256-bit AES,PKI,End-to-end (Transport layer: 128-bit
 
SSLv3)}}
 
| {{Yes|✓ iOS devices, Android, and BlackBerry}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓ Computer-based and Server-based}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
|-
 
| {{rh}} | [[GoToMeeting|LogMeIn GotoMeeting]]
 
| {{Proprietary}}
 
| {{Sort|0000020|1-1000}}
 
| {{Yes|✓}}<ref group=note>Requires HTML5 enabled browsers</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|VGA, HD}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|Whiteboard Anywhere}}
 
| {{No|X}}<ref group=note>Not secure for general meetings, this feature is only available in GoToTraining</ref>
 
| {{No|X}}<ref group=note>Not secure for general meetings, this feature is only available in GoToTraining</ref>
 
| {{No|X}}<ref group=note>Not secure for general meetings, this feature is only available in GoToTraining</ref>
 
| {{Yes|✓}}<ref group=note>Mouse and Keyboard control can be shared with multiple user.</ref>
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}<ref group=note>New HTML5 enabled browsers will be able to join without downloads, with reduced features.</ref>
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
|-
 
| {{rh}} | [[Fuze Box|Fuze Meeting]]
 
| {{Proprietary}}
 
| {{Sort|0000100|1-1000}}
 
| {{Partial}}<ref>[http://support.fuzemeeting.com/entries/20160311-is-fuze-meeting-supported-on-linux How do I get the Fuze Linux App? : Fuze Support] {{webarchive|url=https://web.archive.org/web/20110823085022/http://support.fuzemeeting.com/entries/20160311-is-fuze-meeting-supported-on-linux |date=2011-08-23 }}. Support.fuzemeeting.com. Retrieved on 2014-02-27.</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓ (Vista, 7 & 8)}}
 
| {{Yes|✓}}
 
| {{Yes|}}HD,QVGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓ Blackberry, iPhone, iPad, Android Phone, Android Tablet}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
|-
 
| {{rh}} | [[Genesys (company)|Genesys Meeting Center]]
 
| {{Proprietary}}
 
| {{Sort|0000125|125+}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[Glance Networks|Glance]]
 
| {{Proprietary}}
 
| {{Sort|0000100|100}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[G Suite#Hangouts Meet|Google Meet]]
 
| {{Proprietary}}
 
| {{Sort|0000125|25 (30 for GSuite users)}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|HD}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Yes|✓ (Enterprise Edition Only)}}
 
|-
 
| {{rh}} | [[IBM Sametime]]
 
| {{Proprietary}}
 
| {{Sort|0000000|}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|VGA,HQ,HD (H.264)}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[iMeet]]
 
| {{Proprietary}}
 
| {{Sort|0000125|Up to 125}}
 
| {{Partial}}<ref>[https://community.imeet.com/message/5070#5070 Can iMeet run on Linux? | iMeet Community]. Community.imeet.com. Retrieved on 2014-02-27.</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|HD}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[InterCall|InterCall Unified Meeting]] (IUM)
 
| {{Proprietary}}
 
| {{Sort|0000125|125+}}
 
| {{Partial}}<ref name="webex on 64 bit linux"/>{{self-published source|date=September 2015}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
|-
 
| {{rh}} | [[Livestorm]]
 
| {{Proprietary}}
 
|1-1000
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|HQ,HD (H.264)}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{No|X}}
 
| {{No|X}}
 
|-
 
| {{rh}} | [[Microsoft Live Meeting]] (discontinued)
 
| {{Proprietary}}
 
| {{Sort|0000000|}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA,HQ
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{no|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Partial}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[Mikogo]]
 
| {{Proprietary}}
 
| {{Sort|0000000|1-25}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{no|X}}
 
| {{no|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{no|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[Netviewer]]
 
| {{Proprietary}}
 
| {{Sort|0000100|1-100}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[omNovia Technologies|omNovia Web Conference]]
 
| {{Proprietary}}
 
| {{Sort|0005000|2-5&nbsp;000}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[OpenMeetings]]
 
| {{free|[[Apache License]]}}
 
| {{Sort|0000025|1-125}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Yes|✓}}<ref>[https://cwiki.apache.org/confluence/download/attachments/27842220/OPENMEETINGS%202.0%20-%20User%27s%20manual.pdf?version=2&modificationDate=1341574750000&api=v2 User's Manual, page 18]</ref>
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[PowWow365]]
 
| {{Proprietary}}
 
| {{Sort|0000500|1-500}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|iOS (iPhone, iPad)}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[Skype]]
 
| {{Proprietary}}
 
| {{Sort|00000025|1 to 25|}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA,HQ, HD
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[Skype for Business]] (formerly Microsoft Lync)
 
| {{Proprietary}}
 
| {{Sort|0001000|1 to 1000 (10&nbsp;000 webinar{{citation needed|date=September 2015}})|}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|VGA,HQ, HD}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Partial}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[TeamViewer]]
 
| {{Proprietary}}
 
| {{Sort| 0000025|1-25}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}<ref group=note name="any upload possible">any upload possible</ref>
 
| {{Yes|✓}}<ref group=note name="any upload possible"/>
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{ No|X }}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[TrueConf]]
 
| {{Proprietary}}
 
| {{Sort|0000250|1-250}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}Ultra HD
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|}}iOS, Android, WebRTC
 
| {{Yes|}}iOS, Android, WebRTC
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[UberConference]]
 
| {{Proprietary}}
 
| {{Sort|0000500|1-100}}
 
| {{Yes|✓}}<ref group=note>with WebRTC on Chrome browser</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓ iPhone and Android}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}<ref group=note>Yes if using WebRTC mode through Chrome browser</ref>
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
|-
 
| {{rh}} | [[VenueGen]]
 
| {{Proprietary}}
 
| {{Sort|0000500|1-500}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}<ref group=note name="ReferenceA"/>
 
| {{Yes|}}VGA
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}<ref group=note name="ReferenceB"/>
 
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}<ref group=note name="ReferenceC"/>
 
| {{No|X}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{No|X}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
 
|-
 
|-
 +
|[[OpenMeetings]]
 +
|[[Apache License]]
 +
|<125
 +
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
 +
|[[VGA]]
 +
|Yes
 +
|[[PPT]], [[PDF]], [[DocX]]
 +
|Yes
 +
|Unknown
 +
|Unknown
 +
|No
 +
|Yes
 +
|Unknown
 +
|Unknown
 +
|Unknown
 +
|Unknown
 +
|Unknown
 +
|Unknown
 
|-
 
|-
| {{rh}} | [[Spirit DSP|VideoMost]]
+
|[[Skype]]
| {{Proprietary}}
+
|[[Proprietary]]
| {{Sort|0000500|1-250 (+1500 video broadcast)}}
+
|<25|
| {{Yes|✓}}
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]], [[HQ]], [[HD]]
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|[[PPT]], [[PDF]], [[DocX]]
| {{Yes|}}HD, Full HD, Ultra HD (4K)
+
|No
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓ iPad, Android Phones & Tablets}}
+
|Unknown
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|iPad, Android Phones & Tablets}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|API VideoMost}}
 
| {{Unknown}}
 
 
|-
 
|-
| {{rh}} | [[WizIQ]]
+
|[[Skype for Business]] (formerly [[Microsoft Lync]])
| {{Proprietary}}
+
|[[Proprietary]]
| {{Sort|0001000|Up to 1&nbsp;999}}
+
|<1000
| {{Yes|✓}}
+
|[[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]], [[HQ]], [[HD]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|[[PPT]], [[PDF]], [[DocX]]
| {{Yes|VGA,HQ,HD}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Partial
| {{No|X}}
+
|Unknown
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{[http://developer.wiziq.com API Web Services]}}
 
| {{Unknown}}
 
 
|-
 
|-
| {{rh}} | [[Yuuguu]]
+
|[[TeamViewer]]
| {{Proprietary}}
+
|[[Proprietary]]
| {{Sort|00030|1-30}}
+
|<25
| {{Yes|✓}}
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[VGA]]
| {{Yes|✓}}
+
|Unknown
| {{No|X}}
+
|[[PPT]], [[PDF]]
| {{No|X}}
+
|Yes
| {{No|X}}
+
|Yes
| {{Yes|✓}}
+
|No  
| {{Yes|✓}}
+
|Yes
| {{Unknown}}
+
|Yes
| {{No|X}}
+
|Unknown
| {{No|X}}
+
|Unknown
| {{Unknown}}
+
|Unknown
| {{No|X}}
+
|Unknown
| {{No|X}}
+
|Unknown
| {{Yes|✓}}
+
|Unknown
| {{Unknown}}
 
| {{Yes|✓}}
 
| {{No|X}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
| {{Unknown}}
 
 
|-
 
|-
| {{rh}} | [[Zoho Corporation|Zoho]]
+
|[[Zoho Corporation|Zoho]]
| {{Proprietary}}
+
| Proprietary
| {{Sort|0000000|}}1-5000
+
|<5000
| {{Yes|✓}}
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|[[PPT]]
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{No|X}}
+
|Yes
| {{No|X}}
+
|Yes
| {{No|X}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
 
|-
 
|-
| {{rh}} | [[Zoom Video Communications]]
+
|[[Zoom Video Communications]]
| {{Proprietary}}
+
| Proprietary
| {{Sort|0005000|50-500 (10,000 webinar)}}
+
|<500 (10,000 webinar)
| {{Yes|✓}}
+
|[[Linux]], [[MacOS]], [[Microsoft Windows|Windows]]
| {{Yes|✓}}
+
|[[HD]]
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|[[PPT]], [[PDF]], [[DocX]]
| {{Yes|HD}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|No
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
+
|Unknown
| {{Yes|✓}}
+
|Yes
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{No|}} One-time download
 
| {{Yes|✓}}
 
| {{Yes|✓}}
 
| {{Unknown}}
 
| {{Yes|✓}}
 
|- class="sortbottom"
 
! Program
 
! License
 
! Capacity
 
! Linux
 
[[Image:Tux.svg|25px|Linux]]
 
! macOS
 
[[Image:Apple logo black.svg|25px|Mac OS X]]
 
! Microsoft Windows
 
! Audio Support
 
[[Image:Stock volume.svg|25px|Audio Support]]
 
! Video Quality
 
! Video Support
 
! Chat Support
 
! Desktop Sharing Support
 
! Whiteboard
 
! Upload PPT
 
! Upload PDF
 
! Upload Doc / DocX
 
! Co-browsing
 
! Mobile Device Support
 
! Break-Out Sessions
 
! Security Access
 
! Encrypted communication
 
! Host meeting from Mobile
 
! Attend meeting from Mobile
 
! Cloud Based no download
 
! Recording capabilities
 
! VoIP
 
! Embeddable
 
! Dial in by phone
 
 
|}
 
|}
 +
 +
==Comparison of open-source applications==
 +
 +
*[[Apache OpenMeetings|OpenMeetings]]. One of the most popular [[open-source]] [[webconferencing]] tools online today. In addition to video conferencing, it features instant messaging, document sharing and editing, whiteboard, and a variety of other useful apps, such as the Red5 Streaming Server that allows you to stream and share remotely. The platform provides webcam, microphone, screen sharing, and recording support, as well.
 +
*[[BigBlueButton]]. This [[open-source]] [[webconferencing]] tool is hosted at Google code and is comprised of more than 14 different open source components. This makes it easy to use, flexible, and scalable. eLearning moderators have the ability to control the audio tools for the entire audience, and can even give online learners and collaborators the chance to present their ideas and opinions to the rest of the class. Annotation tools are also included, thanks to the integrated whiteboard that enables you to zoom in, highlight key ideas, and draw notes directly onto your virtual presentation.
 +
*[[Jitsi]]. Features HD audio with Opus, full security encryption, desktop sharing, and integrated chat support. You can also transfer files and send professional webinar and video conferencing invites to your attendees thanks to their customized URLs. A few other perks of using Jitsi are: video relaying, an active support community, and an integrated media library. It runs on all operating systems, including Mac and Linux. If you run into any issues, their site provides a comprehensive FAQ that covers a number of useful topics, which is a notable benefit for those who are new to the world of online video conferencing.
 +
*https://blog.capterra.com/4-open-source-video-conferencing-tools-for-small-businesses/
 +
 +
==Related lectures==
 +
*[[Communication Quarter]].
 +
*[[What CNM Talk Be]].
 +
 +
[[Category: Septem Artes Administrativi]][[Category: CNM Cyber Orientation]][[Category: Articles]]

Latest revision as of 15:48, 12 October 2020

Webconferencing software (also known as web conferencing software, particularly, web conferencing system, webconferencing system, webconferencing platform, or, more broadly, conferencing platform; hereinafter, the Software) is software, a software application, or software system that supports webconferencing including just audio conferencing and audiovisual conferencing conducted over the Internet.

Videoconferencing software is a subset of the Software since videoconferencing may not necessarily include video. For instance, webconferencing can be conducted using phone calls only.


Features

Chat support, desktop sharing support, recording capabilities

Comparison of proprietary applications

Application License Capacity OS Video Whiteboard Upload Co-browsing Mobile Device Support Break-out Sessions Security Access Encrypted communication Host from Mobile Attend from Mobile Cloud-based no download VoIP Embeddable Dial-in by phone
Adobe Connect Proprietary <1500 (80 000 w/webcast) Linux, MacOS, Windows VGA, HQ, HD Yes PPT, PDF Yes iPhone, iPad, Android Yes Yes Yes Yes iOS, Android, RIM Yes Yes No Yes
BigBlueButton LGPL, GPL <80 Linux, MacOS, Windows VGA, HQ Yes PPT, PDF, DocX No Yes Yes Yes No Coming soon Android Yes Yes Yes Unknown
Cisco WebEx Proprietary <3000 MacOS, Windows VGA, HQ, HD Yes PPT, PDF, DocX Yes Yes Yes Yes 256-bit AES,PKI, End-to-end (Transport layer: 128-bit

SSLv3)

iOS, Android, BlackBerry Yes Yes Yes Unknown Yes
LogMeIn GotoMeeting Proprietary <1000 Linux, MacOS, Windows VGA, HD Yes No (available only in GoToTraining) Yes Yes No Yes Yes Yes Yes (with reduced features) Yes Unknown Unknown Yes
Google Meet Proprietary <25 (30 for GSuite users) Linux, MacOS, Windows HD No PPT, PDF, DocX No Yes No Yes Yes Yes Yes Yes Unknown Unknown Enterprise Edition only
OpenMeetings Apache License <125 Linux, MacOS, Windows VGA Yes PPT, PDF, DocX Yes Unknown Unknown No Yes Unknown Unknown Unknown Unknown Unknown Unknown
Skype Proprietary Linux, MacOS, Windows VGA, HQ, HD No PPT, PDF, DocX No Yes Unknown Yes Yes Yes Yes No Unknown Unknown Unknown
Skype for Business (formerly Microsoft Lync) Proprietary <1000 MacOS, Windows VGA, HQ, HD Yes PPT, PDF, DocX Yes Yes Unknown Yes Yes Yes Yes Partial Unknown Unknown Unknown
TeamViewer Proprietary <25 Linux, MacOS, Windows VGA Unknown PPT, PDF Yes Yes No Yes Yes Unknown Unknown Unknown Unknown Unknown Unknown
Zoho Proprietary <5000 Linux, MacOS, Windows Unknown No PPT No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Zoom Video Communications Proprietary <500 (10,000 webinar) Linux, MacOS, Windows HD Yes PPT, PDF, DocX Yes Yes Yes Yes Yes Yes Yes No Yes Unknown Yes

Comparison of open-source applications

  • OpenMeetings. One of the most popular open-source webconferencing tools online today. In addition to video conferencing, it features instant messaging, document sharing and editing, whiteboard, and a variety of other useful apps, such as the Red5 Streaming Server that allows you to stream and share remotely. The platform provides webcam, microphone, screen sharing, and recording support, as well.
  • BigBlueButton. This open-source webconferencing tool is hosted at Google code and is comprised of more than 14 different open source components. This makes it easy to use, flexible, and scalable. eLearning moderators have the ability to control the audio tools for the entire audience, and can even give online learners and collaborators the chance to present their ideas and opinions to the rest of the class. Annotation tools are also included, thanks to the integrated whiteboard that enables you to zoom in, highlight key ideas, and draw notes directly onto your virtual presentation.
  • Jitsi. Features HD audio with Opus, full security encryption, desktop sharing, and integrated chat support. You can also transfer files and send professional webinar and video conferencing invites to your attendees thanks to their customized URLs. A few other perks of using Jitsi are: video relaying, an active support community, and an integrated media library. It runs on all operating systems, including Mac and Linux. If you run into any issues, their site provides a comprehensive FAQ that covers a number of useful topics, which is a notable benefit for those who are new to the world of online video conferencing.
  • https://blog.capterra.com/4-open-source-video-conferencing-tools-for-small-businesses/

Related lectures