Please note that ALL foreign nationals, including American and EU passport holders, must hold a valid visa in order to travel to India. Visas must be applied for in advance at an Indian embassy or consulate. See here for more details.
Nationals of certain countries may be eligible for e-tourist visa. Check this website for more details.
While applying for a Visa, you may need to attach with your visa application an official invitation letter from the conference organizers. If you need such an invitation, please send an email to spcom2016@gmail.com with the following information:
Please check with your nearest Indian consulate/embassy for information that may be specific to your country of residence. The visa application process should be quite straightforward in most cases. However, we strongly urge you to please apply for your visa at least six weeks in advance of your travel dates.
Please send an email to spcom2016@gmail.com if you need any further information or documentation from our side to assist you with the visa application process.