Sincere - Turn Handwritten Care into Lasting Change

Sincere is the easiest way for businesses and non-profits to create personalized postcarding and letter-writing campaigns with quantifiable outcomes. Over 10 million people engaged through authentic, handwritten outreach.

Features

• Personalized postcard and letter-writing campaigns
• User-friendly interface for staff and volunteers
• Campaign tracking with measurable results
• Trusted by leading nonprofits and advocacy organizations