Table 1. Comparison of Heatmapper to other freely available heat map tools.

Feature	Heatmapper	OpenHeat Map	CIMminer	Heatmap Generator	Gitools	Gene Pattern
Expression, clustered heat maps	Yes	No	Yes	Yes	Yes	Yes
Distance matrix heat maps	Yes	No	No	No	No	No
Correlation matrix heat maps	Yes	No	No	No	Yes	No
Image overlay heat maps	Yes	No	No	No	No	No
Choropleth heat maps	Yes	Yes	No	No	No	No
longitude/latitude heat maps	Yes	Yes	No	No	No	No
Graphical user interface	Yes	Yes	Minimal	Yes	Yes	Yes
Web interface	Yes	Yes	Yes	No	No	Difficult
Installation requirements	None required	None required	None required	Installation required, unreliable	Installation required	None required
Initial heat map generation	Instantly	Submission form to receive email	Submission form to receive email	Instantly	Instantly	In several seconds
Interactive data editing	Yes	Yes	No	No	Yes	No