MailerBot vs MailStream
MailerBot
mailerbot.com
MailStream
mailstream.appSide by side
| Figure | MailerBot | MailStream |
|---|---|---|
| Price from | $99/mo | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Plans published | 3 | 0 |
| Spec score · Direct Mail Automation Software | 8.7 (#4) | 7.3 (#18) |
| Automation | Scale includes automated drip sequences, triggered sends, and multi-touch flows. | The REST API and MCP server support sending, tracking, address verification, and creative generation. |
| Integrations | The integrations page describes an MCP server for Claude, ChatGPT, Cursor, and other MCP-compatible clients, authenticated through OAuth 2.1. | The integrations page describes Planning Center as available and lists several others, including Shopify, Zapier, Make, and n8n, as coming soon. |
| Intended users | The site presents MailerBot for retail, nonprofits, home services, startups, and digital nomads. | The about page describes MailStream as physical-mail infrastructure for AI agents, agencies, SaaS teams, and business operators. |
| Personalization | Merge fields insert recipient data such as names and locations into designs. | The service supports variable fields such as names, offer codes, QR links, account numbers, and balances in mail designs. |
| Product | MailerBot creates, personalizes, and sends postcards, letters, and invoices through an API or dashboard. | MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters. |
| Support | Launch includes community and email support with a stated 48-hour response, while Scale adds priority email and chat during business hours. | The security page says MailStream will share SOC 2 reports, complete security questionnaires, and arrange calls with its security team. |
| What it does | MailerBot lets businesses create, personalize and send physical postcards, letters and invoices through a web dashboard or API. | MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters. |
Plans
In their own words
MailerBot
MailerBot creates and sends physical postcards, letters, invoices, EDDM and custom print pieces through an API or dashboard. Users can design postcards, write letters in a rich text editor or upload print-ready PDFs. Designs support merge fields, links, QR codes and coupon codes with usage tracking. Contacts can be imported from CSV, checked against addresses and grouped into targeted lists. Campaign analytics track spend, volume and delivery rates, with date filters and report export. The REST API has more than 50 endpoints and supports JWT and API key authentication. Scale adds automated drip sequences, triggered sends and multi-touch flows. MailerBot says it prints, stamps and mails pieces, with delivery-status tracking; Launch includes USPS Intelligent Mail Barcode tracking on each piece. Scale costs $99/month, with letters priced at 69¢ for the first page plus 15¢ per additional page and postcards at 49¢. Command costs $399/month. The site presents the service for retail, nonprofits, home services, startups and digital nomads.
MailStream
MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters domestically. Postcards are offered in 4×6, 6×9, and 6×11 inch sizes, while letters use HTML templates or uploaded PDFs in white #10 double-window envelopes. A browser HTML and CSS editor supports personalized designs, reusable templates, and print proofs. Variable fields can add names, offer codes, QR links, account numbers, and balances. MailStream says it CASS-verifies addresses before printing and flags invalid or incomplete entries. USPS Intelligent Mail barcodes expose status through the dashboard, API, or webhooks. Printing and USPS handoff are listed at 1 to 2 business days, for campaigns targeting 10 to 100,000 addresses. Integrations include Shopify, Zapier, Make, n8n, and HTTP tools. The hosted MCP server lists 27 tools. A free plan is available; paid access starts at $99/mo. Security features include TLS 1.2 or higher, AES-256 at-rest encryption, annual SOC 2 Type 2 audits, and HIPAA handling with BAAs.