Letterby

A waitlist and referral platform that helps creators and businesses build viral pre-launch campaigns. It solves the problem of generating early interest and validating ideas by enabling users to create customizable signup pages, import contacts, and incentivize referrals. The product targets marketers, founders, and startups looking to grow an audience before launch. It is delivered as a SaaS with a free tier, offering features like email campaigns, analytics, and integrations via Zapier and API.

Key features

• Form builder with customizable fields
• Custom email editor
• Custom domain support
• Import contacts from other tools
• Website widget for embedding
• Referral system with points
• Milestone tracking
• Newsletter and email campaigns
• Smart audience segmentation
• Contact management CRM
• Zapier integration
• API and webhooks
• Built-in analytics
• Email verification
• Automatic domain warming
• Whitelist feature