Commercial
LGPL
GPL
License cost
License fee charged No license fee No license fee
Must provide source code changes to Qt
No, modifications can be closed Source code must be provided Source code must be provided
Can create proprietary applications
Yes - No source code must be disclosed Yes, in accordance with the LGPL v. 2.1 terms No, applications are subject to the GPL and source code must be made available
Updates provided
Yes, immediate notice sent to those with a valid support and update agreement Yes, made available Yes, made available
Support Yes, to those with a valid support and update agreement Not included but available separately for purchase Not included but available separately for purchase
Charge for Runtimes
Yes, for some embedded uses No No