When comparing Robo 3T (previously Robomongo) vs NoSQL Booster, the Slant community recommends NoSQL Booster for most people. In the question“What are the best GUIs for MongoDB?” NoSQL Booster is ranked 2nd while Robo 3T (previously Robomongo) is ranked 3rd. The most important reason people chose NoSQL Booster is:
Has a built-in language service offering completions for methods, properties, variables, keywords, even the MongoDB collection names, field names, and operators.
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Pros
Pro Free, open source and cross-platform
Robomongo is available for free on Windows, OSX and Linux. It's licensed under GPL with source code available here.
Pro IntelliSense
Has a built-in language service offering completions for methods, properties, variables, keywords, even the MongoDB collection names, field names, and operators.
Pro Visual query builder
Build queries visually with the query builder.
Pro SQL Queries
Build queries with a familiar SQL syntax.
Cons
Con Aquired
The project has been acquired by a rival company so naturally it will lag behind their own offering.