When comparing SchemaCrawler vs SQLGate, the Slant community recommends SQLGate for most people. In the question“What are the best database design programs?” SQLGate is ranked 2nd while SchemaCrawler is ranked 9th. The most important reason people chose SQLGate is:
Functions; filter, sort and group on grid / Copy, past, sum and statistics functions like excel.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

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
Pro Quick data analysis
Functions; filter, sort and group on grid / Copy, past, sum and statistics functions like excel.
Pro Saves time with autocomplete & template functions
Pro Fast processing and easy customization
They put out weekly updates, so there are new and impressive functions being added pretty consistently.
Pro Supports cloud-based DB such as AWS & Azure
Pro Includes PL/SQL editor and debugger
Pro ER diagrams
Entity Relationship database diagrams limitations are: only supports reverse engineering, and can not export to formats other than .erd
Cons
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.
Con Logon
The logon process after starting up the application is rather long winded (tested with PostgreSQL, no defaults shown for e.g. port number).
Con Free version is limited
e.g. only 10 tables allowed in ERD designer.
