There are different types of egg incubators available in the market, each with its own set of features. Here are some of the most common types:

1. Still-air incubators: These are the most basic type of incubator and rely on natural air circulation. They have a simple design, with a heating element at the bottom and a thermostat to control temperature. Still-air incubators are affordable but may not provide consistent temperature and humidity levels.
2. Forced-air incubators: These are more advanced incubators that use a fan to circulate warm air evenly throughout the incubator. They have a higher hatch rate and are more reliable than still-air incubators. Forced-air incubators also come with a thermostat and hygrometer to control temperature and humidity levels.
3. Cabinet incubators: These are larger incubators that can hold a larger number of eggs, usually over 100. Cabinet incubators are usually more expensive but provide more precise temperature and humidity control, and can be automated for ease of use.
4. Automatic incubators: These are fully automated incubators that can control temperature, humidity, and egg turning. They can be programmed to mimic the natural incubation process and provide more consistent results.
5. Portable incubators: These are smaller incubators that can be easily transported and are ideal for backyard chicken keepers or small-scale producers. Portable incubators may be still-air or forced-air and come with a range of features, depending on the model.
6. Commercial incubators: These are large-scale incubators used in commercial egg production. They can hold thousands of eggs and are fully automated, with advanced temperature and humidity control systems.

When choosing an egg incubator, it’s important to consider factors such as the number of eggs you plan to hatch, the level of automation you require, and your budget. Ultimately, the right incubator will depend on your specific needs and preferences.