Based on our record, KeepCalling should be more popular than FireRTC. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I personally use firertc.com since its free, although I'm not sure if the sign up is open anymore. Source: about 3 years ago
Tello shares ownership with KeepCalling. KeepCalling's whole business is international calling. Source: about 1 year ago
As someone else in this post suggested, I also recently learned about KeepCalling: https://keepcalling.com/. Source: over 2 years ago
Call2friends - High-quality cheap and free international calls online to any mobile or landline numbers from internet and free calling app - cheaper than other VoiP providers. Try it now!
toolani - Cheap international calls
Make Free Calls Online - Make Free Calls Online is a web application that, as the name suggests, allows its users to make international and local calls for free.
BNESIM - The all-in-one app for your communications. Voice, SMS, rooms, data SIM & eSIM in 200+ countries without roaming fees. Double data on the first top-up. Two years back-to-back winner of the "World Travel awards" for 2019 and 2020.
Poptox - Poptox is a web application where you can communicate with people in every corner of the world.
mytello - Cheap international calls via local dial in number at very attractive prices.