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MailStream

No phone app

7.4No. 7 of 28
in Direct Mail Automation Software
  • Recognised40% of the score86
  • Phone app26% of the score0
  • Documented20% of the score100
  • Free plan14% of the score30
Free plan
No
Runs on
api, Web
Visit site Alternatives

Summary

MailStream is ranked #7 of 28 in direct mail automation software on Samsung Mobile US Press. It runs on API, Web.

Compared on direct mail automation software

Free plan
Yesmailstream.app
Paid from
$99/momailstream.app
Mail formats
4×6, 6×9, and 6×11 postcards; 8.5×11 lettersmailstream.app
Personalization level
variablemailstream.app
API access
Yesmailstream.app
CRM connections
Planning Center, HubSpot, Salesforce, GoHighLevel, ActiveCampaignmailstream.app
Address verification
Yesmailstream.app
Delivery scope
domesticmailstream.app

Facts

What it does
MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters.mailstream.app · 2 Oct 2026
Printing
MailStream says it prints and hands mail to USPS within 1 to 2 business days.mailstream.app · 2 Oct 2026
Postcards
Postcards are available in 4×6, 6×9, and 6×11 inch sizes on Premium 100# Gloss Cover stock.mailstream.app · 2 Oct 2026
Letters
Letters can be generated from HTML templates or uploaded as PDFs, then mailed in white #10 double-window envelopes.mailstream.app · 2 Oct 2026
Personalization
The service supports variable fields such as names, offer codes, QR links, account numbers, and balances in mail designs.mailstream.app · 2 Oct 2026
Address checks
MailStream says addresses are CASS-verified before printing and invalid or incomplete addresses are flagged.mailstream.app · 2 Oct 2026
Tracking
Mail pieces are tracked with USPS Intelligent Mail barcodes, with status available through the dashboard, API, or webhooks.mailstream.app · 2 Oct 2026
Integrations
The homepage names Shopify, Zapier, Make, and n8n, as well as any tool that speaks HTTP, as integration options.mailstream.app · 2 Oct 2026
AI agents
The hosted MCP server offers 27 tools and lists compatibility with Claude, ChatGPT, Cursor, LangChain, AutoGen, and n8n.mailstream.app · 2 Oct 2026
Security
The security page says API traffic uses TLS 1.2 or higher and customer data and artwork are encrypted at rest with AES-256.mailstream.app · 2 Oct 2026
Compliance
MailStream says it undergoes annual SOC 2 Type 2 audits and offers HIPAA-compliant handling and BAAs for healthcare clients.mailstream.app · 2 Oct 2026
Webhook reliability
Webhooks use HMAC-SHA256 signatures and retry failed or timed-out deliveries up to five attempts over 24 hours.mailstream.app · 2 Oct 2026
Support
MailStream says it can provide SOC 2 reports, complete security questionnaires, and arrange calls with its security team.mailstream.app · 2 Oct 2026
Intended users
The about page describes MailStream as physical-mail infrastructure for AI agents, agencies, SaaS teams, and business operators.mailstream.app · 2 Oct 2026
Product
MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters.mailstream.app · 3 Oct 2026
Design
Its browser-based HTML and CSS editor supports personalized designs, reusable templates, and print proofs.mailstream.app · 3 Oct 2026
Address validation
The service says it CASS-verifies addresses before printing and flags invalid or incomplete addresses.mailstream.app · 3 Oct 2026
Automation
The REST API and MCP server support sending, tracking, address verification, and creative generation.mailstream.app · 3 Oct 2026
Scale and turnaround
The company says campaigns can target 10 to 100,000 addresses and that mail is printed in 1 to 2 business days.mailstream.app · 3 Oct 2026
Audience
MailStream describes itself as serving developers, AI agents, teams, agencies, SaaS businesses, and operators automating direct mail.mailstream.app · 3 Oct 2026
Company
The About page names Jake Fassnacht, Jeff Kingsford, and Marton Gergely as co-founders and says Jeff founded an online printing and marketing company that operated from 1998 to 2018.mailstream.app · 3 Oct 2026

Best MailStream alternatives

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Postalytics No. 1 8.2 No phone app$199/mothanks.io No. 2 8.1 No phone app$49/moStannp No. 3 8.0 No phone app$12/moDocuPost No. 4 7.9 No phone app$9.95/moInkit No. 5 7.7 No phone app$20/moPostPilot No. 6 7.6 No phone app$82.50/mo

Where it ranks on Samsung Mobile US Press

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Sources