If you cannot afford ATLAS.ti and your institution doesn't provide it, consider these free, open-source Qualitative Data Analysis (QDA) tools:
Many academic journals and institutional review boards (IRBs) require researchers to disclose the tools used. Using pirated software can jeopardize the legitimacy of your published research. How to Get ATLAS.ti Legally (Free & Discounted)
A simple, open-source tool for highlighting and tagging text.
If budget is the primary concern, there are several legitimate ways to use the software without breaking the bank:
Instead of buying a perpetual license, you can opt for a short-term license (6 months) which is very affordable for a single thesis or project.
Most "Crack" or "Keygen" files are wrappers for malware, ransomware, or keyloggers. Downloading these can give hackers access to your personal information or lock your computer for ransom [2].