ABBYY provides interested developers a full featured SDK with a time and volume restriction. So it is possible to evaluate all given options of the SDKs.
Before the the trial serial number and the download login is send out, the company/developer has to sign a Trial Software License Agreement (TSLA)
The TSLA contains for example:
Definitions,
Trial SDK usage terms
Developer's obligations
Confidentially terms
Legal terms
Signatures of ABBYY and the Company/Developer
Additionally some questions about the planed usage and technical requirements of the ABBYY SDKs within the project and application are asked, for example: