Stannp
Stannp is a direct mail marketing platform built to design, schedule, send, automate, and track direct mail at scale. It helps teams print and send direct mail worldwide, including postcards, letters, and self-mailers, while connecting direct mail to modern marketing workflows through more than 1,000 integrations and a custom API. Users can upload a PDF and send letters through virtual printing, create bulk mail campaigns, or set up automated triggered communications for reminders, renewals, newsletters, customer milestones, abandoned carts, lead follow-ups, win-back campaigns, sales, and events. Stannp positions direct mail as a high-impact marketing channel that reaches and engages contacts in a tangible way, combining the visual and tactile nature of print with the tracking, personalization, and automation expected from digital tools. It supports fully personalized follow-up mail, triggered postcards with product images and voucher codes, segmented seasonal campaigns, etc.
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Mailjoy
A DIY tool to design, mail, and track personalized postcard and letter campaigns. Surprise your best customers with a special coupon code during your next sale. Reengage customers who've unsubscribed from your product by offering them a discount. Send personalized real estate postcards with data on the property you're mailing to. Delight your target audience by sending them a personalized card. Send personalized direct mail to welcome new customers to your product or service. Reach customers in your next marketing campaign through email and mail simultaneously. Compared to digital channels, mail is an unsaturated channel that until today has been generally inaccessible and lacked personalization. Mailjoy is the tool to reach customers or prospects with mail that's relevant and timely to them. Start by customizing any of our free postcard and letter templates. Mailjoy provides a ton of features to help you create mailing lists from your contacts.
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DocuSend
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.
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Thanks.io
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.
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