WebphoneLib vs freeswitch

WebphoneLib

Easier web calling by providing a layer of abstraction around SIP.js (by open-voip-alliance)

SIP sip-js

Source Code

open-voip-alliance.github.io

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FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device. (by signalwire)

Freeswitch signalwire open-source source-code Voip WebRTC Telephony SIP IoT

Source Code

freeswitch.com

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WebphoneLib		freeswitch
	Project
2	Mentions	3
62	Stars	3,131
-	Growth	5.9%
4.2	Activity	8.6
5 months ago	Latest Commit	6 days ago
TypeScript	Language	C
MIT License	License	GNU General Public License v3.0 or later

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

WebphoneLib

Posts with mentions or reviews of WebphoneLib. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-03-08.

SIP Client Development - which stack to use ?
2 projects | /r/VOIP | 8 Mar 2023

- Javascript (I saw sip.js and also open-voip-alliance/WebphoneLib)
Custom softfone. Or softphone library?
1 project | /r/VOIP | 8 Apr 2021

We have built & use the webphone-lib for this. It has a nice demo page which you can run puppeteer tests against to test your sip stack: https://github.com/open-voip-alliance/WebphoneLib#run-puppeteer-tests

freeswitch

Posts with mentions or reviews of freeswitch. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-04-29.

Virtual line to offer audiobooks by phone?
1 project | /r/VOIP | 17 Aug 2022

Hopefully an update to allow speed changes will land... https://github.com/signalwire/freeswitch/pull/244
Ask HN: Did Plivo silently abandon open sourcing their software?
4 projects | news.ycombinator.com | 29 Apr 2022

Some clarification on what you mean would be great.
When I look at their organization on Github I see quite a few active projects e.g. "Sharq" - SHARQ Server is an flexible, rate limited queuing system based on the SHARQ Core library and Redis. (https://github.com/plivo/sharq-server) as well as client packages in quite a few languages.
Beyond that the documentation you referenced clearly points out that FreeSwitch (https://github.com/signalwire/freeswitch) is the telephony engine (https://web.archive.org/web/20130314113846/http://docs.plivo...) and the install script from the docs shows that their roots are in Pilvo being a Python web app (https://github.com/plivo/plivoframework/blob/master/scripts/...). I also see a few Django applications in their repositories as well.
Thus, they open sourced their software. Are they open sourcing all of their software? Likely not. It could be that they open sourced much of their code and then got no contributions.
If they weren't receiving any contributions in alignment with their development, there would be no value for them to continue to have that distraction from running their business. It could also be that they didn't have the resources to _maintain_ external facing repositories, issues, and the communities around them.
Providing a more clear explanation of your expectations would help get you the best answer.
UDM Pro listening on undocumented TCP port 2856 with cert valid for 100 years - what is this and how do I turn it off?
1 project | /r/Ubiquiti | 1 Apr 2021

FreeSwitch is a telecom stack similar to Asterisk. See here: freeswitch. It would be to support VoIP on the UDMP.