When comparing Toad vs SchemaCrawler, the Slant community recommends SchemaCrawler for most people. In the question“What are the best relational database design and modelling tools?” SchemaCrawler is ranked 8th while Toad is ranked 15th. The most important reason people chose SchemaCrawler is:
The text-based output serves for database documentation, and is designed to be diff-ed against other database schemas.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Reliable
Toad is maintained by Dell and has great community support.
Pro Free
Toad is free to use.

Pro Many options for output formats in addition to graphical
The text-based output serves for database documentation, and is designed to be diff-ed against other database schemas.

Pro Extensive and detailed documentation online
Including visuals of the results of command-line option usage.

Pro Free
Cons
Con Fewer features
Still some more features are required to add. Other than that its perfectly fine.
Con No built-in SSH tunneling
Toad currently doesn't provide built-in SSH tunneling.
Con Need Java

Con Does not work with schema dumpfiles
SchemaCrawler has no methods for dealing with when you only have a schema generated via something like (mysqldump --no-data [options] >schema-only_dump.sql) , and do not currently have access to a live database to connect with.
