Handwrytten

Remotely send your documents directly to the United States Postal Service through our cloud-based mailroom. DocuSend works with any accounting, billing, or CRM software that produces PDF documents containing a valid mailing address. Users can upload directly, or developers can integrate our REST API to offer a "Send Mail" button in their software, either as a reseller or for internal direct connectivity. There are enormous economic advantages for any business or organization that needs to safely print and mail documents on demand. We also offer an automated email service called DocuLink that lets you know which users open the document links sent and makes it easy to follow up with a hard copy if needed. We are sure that one of our features will improve your mailing experience: DocuSend, DocuLink or the Print-To-Mail Rest API will streamline the manual and time-consuming print, mail and email process.

thanks.io is a direct mail automation platform and API that sends handwritten-style postcards, letters, notecards, gift cards, and MagnaCards on autopilot. Trusted by 5000+ businesses since 2017, it helps marketers, agencies, realtors, e-commerce brands, and SaaS companies cut through digital noise with physical mail. Features: proprietary handwriting engine with realistic AI fonts, per-recipient AI messaging, dynamic images, Street View postcards, QR code tracking, scan notifications, and analytics. Automation: drip campaigns, birthday/holiday triggers, Neighbor Blast radius mailers, evenFLOW paced sending, address verification, suppression lists, and Canva-synced templates. Developer-first REST API v2 with OpenAPI spec, OAuth2, webhooks, embeddable widget, and LLM-friendly MCP server. 500+ integrations: HubSpot, Salesforce, Shopify, WooCommerce, Zapier, Make, n8n, and 8,000+ apps. No minimums, no commitments, real free tier, nonprofit rates from $0.45/piece.