QA teams in startups often face several challenges, including: 1. Limited Resources: Startups usually have constrained budgets and may not afford extensive QA processes. 2. Time Constraints: The pressure to launch quickly can lead to shortcuts in testing, which may compromise quality. 3. Rapid Changes: Frequent changes in product features or design can make it difficult to keep test cases up to date. 4. Lack of Documentation: In a fast-paced environment, proper documentation might be overlooked, complicating the QA process.