Presentation Thank you Letters

Dear {Guest Speaker},

On behalf of everyone at {organization/company}, I would like to thank you for sharing your time and expertise on {topic} at {event}.

Our audience found your {talk/presentation} very {informative/helpful/inspiring}. Personally, I thought the part about {subtopic} was particularly interesting. {Elaborate on why you think it's interesting.}

Thank you again for helping make {event} a success. We hope you can grace our stage again next year.

Sincerely,
{Your Name}

Dear {Recipient},

Thank you for speaking at {event} {today/yesterday/etc.}. We greatly appreciate your willingness to share your time and expertise on {topic}. The event would not have been a success without your {informative/inspiring} {talk/presentation}.

It was very interesting to hear about your {speaker's perspective/experiences}. Several people I spoke with found your {talk/presentation} to be {what they liked about it/learned from it}.

Thank you again for your contribution. We hope you will be able to join us again next year.

Sincerely,
{Your Name}