Security: Look for exchanges with robust security measures, including two-factor authentication and cold storage for user funds.
Ease of Use: Consider the user interface and experience, especially if you are a beginner.
Supported Cryptocurrencies: Ensure the exchange supports the cryptocurrencies you intend to trade.
Fees: Check the fee structure, including trading fees, withdrawal fees, and any other applicable charges.
Regulatory Compliance: Verify the exchange's adherence to regulatory requirements in your jurisdiction.

When choosing a cryptocurrency exchange, consider these factors, and there are a few other factors you should be aware of. Contact Clarisco for that. They develop a full-featured cryptocurrency exchange for you.