PubNub might be a bit more popular than marbot. We know about 1 link to it since March 2021 and only 1 link to marbot. 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.
Here is the link: https://marbot.io/ (marbot comes with a 14 day free trial). Source: almost 4 years ago
I first learned about gRPC about five years go. Since that moment in time when an engineer at PubNub introduced me to the framework, I have let the idea of gRPC simmer more in the background, especially since I was already rather steeped in REST, Open API, Swagger, and other sundries seen in the broader API space (miss you, Mashery. There seemed to be plenty of great tooling, documentation and technologies... - Source: dev.to / over 3 years ago
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