Hey HN! I am asking out of genuine curiosity, and perhaps doing a little market research. My team uses https://www.donut.com/ and https://officevibe.com/ but I'm pretty sure we're on the free tier for both. Do you work in a team that pays monthly for any cool Slack apps or integrations? Which ones? If you're not the one paying, do you find it useful - or annoying? Cheers! - Source: Hacker News / over 1 year ago

Officevibe, which is an employee experience platform, regularly sends out Slack notifications on behalf of their customers asking employees to complete a brief survey. Their engineering team utilizes the Automations API to create lists of users for whom the Slack survey could not be delivered and send them an email survey instead. - Source: dev.to / about 2 years ago

Well I can tell you that any SIP program can do this, one that comes to mind is Linphone. But you do need a provider. Almost all providers deal with UDP. You might be able to find one that transmits over tcp but that’ll be a very small list. TCP isn’t reliable for VoIP, for media anyway. At best you’ll find one that encrypts the signaling over TLS, which is TCP. But audio, even if encrypted too, is done over UDP.... Source: over 1 year ago

Does Linphone (https://linphone.org/) not meet that need of cross platform (website claims versions for all major OS'es) and open source (https://gitlab.linphone.org/BC/public/linphone-desktop)? - Source: Hacker News / over 1 year ago

Similarly, you can use any SIP (VoIP) provider (e.g. VOIPo Cloud), and configure the SIP account details in your native phone app. This way you will also be able to use a SIP softphone on your computer (e.g. LinPhone on Linux or Telephone on Mac), or even a real SIP phone in your home. Depending on your SIP plan you may or may not be able to make international calls this way. Source: over 2 years ago

I heard on RFD Fonus is using linphone.org to code their service. Source: almost 3 years ago