Cobalt vs rasa NLU: What are the differences?
Cobalt: Public bug bounty programs. Sign up for free in just a few minutes and ask our top researchers to evaluate the security of your web or mobile app. Decide to run either a bug bounty program or an agile crowdsourced security audit. Choose from our Core of vetted researchers or the whole Crowd; rasa NLU: Open source, drop-in replacement for NLP tools like wit.ai. rasa NLU (Natural Language Understanding) is a tool for intent classification and entity extraction. You can think of rasa NLU as a set of high level APIs for building your own language parser using existing NLP and ML libraries.
Cobalt and rasa NLU are primarily classified as "Bug Bounty as a Service" and "NLP / Sentiment Analysis" tools respectively.
rasa NLU is an open source tool with 5.76K GitHub stars and 1.7K GitHub forks. Here's a link to rasa NLU's open source repository on GitHub.