Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Direct Mail Automation Software

MailStream vs DocuPost

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score MailStream #5 in Direct Mail Automation Software 8.8/10 Free plan Free plan✓ 2 of 2 features Visit MailStream
DocuPost #6 in Direct Mail Automation Software 8.7/10 Free plan Free plan✓ 2 of 2 features Visit DocuPost

MailStream leads on 0 checks, DocuPost on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMailStream · 8.8/10
  • Free planboth

MailStream scores higher on our rubric for direct mail automation software: 8.8 against 8.7 out of 10; our editors rank them #5 and #6.

On delivery scope, DocuPost gives you Both where MailStream offers Domestic.

MailStream is the better fit for API-first postcard and letter automation. DocuPost is the better fit for businesses mailing letters, postcards, and checks.

  • MailStream fits best

    API-first postcard and letter automation

  • DocuPost fits best

    Businesses mailing letters, postcards, and checks

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature MailStream 8.8/10 Visit ↗ DocuPost 8.7/10 Visit ↗
At a glance
Editor score 8.8 8.7
Ranking #5 in Direct Mail Automation Software #6 in Direct Mail Automation Software
Best for API-first postcard and letter automation Businesses mailing letters, postcards, and checks
Pricing model Free plan + paid Free plan + paid
Starting price $99/mo —
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Email, Docs Email, Tickets, Docs
Integrations 11 integrations 7 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features MailStream 2/2 · DocuPost 2/2
API access ✓ ✓
Address verification ✓ ✓
Specs
Mail formats 4×6, 6×9, and 6×11 postcards; 8.5×11 letters letters, postcards, checks
Personalization level Variable Variable
CRM connections Planning Center, HubSpot, Salesforce, GoHighLevel, ActiveCampaign HubSpot
Delivery scope Domestic Both
Our review
Pros
  • REST API, webhooks, and AI-agent MCP server
  • Variable-data personalization with reusable HTML/CSS templates
  • Address verification, USPS tracking, and radius-based targeting
  • Free plan supports letters and postcards with no send limits
  • Bulk CSV imports, merge fields, API sending, and USPS tracking
  • Supports letters, postcards, checks, and international mailing
Cons
  • Delivery is currently focused on the US
  • Priority support starts with the $99 Pro plan
  • Enterprise features require a $499 monthly subscription
  • Check mailing requires the Premium plan
  • Enterprise features begin at $99.95 per month
  • Personalization level can vary by mailing workflow
Our verdict

MailStream is a direct mail automation platform for sending postcards and letters through a web dashboard, REST API, webhooks, or AI-agent workflows. It is designed for developers, marketers, agencies, SaaS teams, e-commerce businesses,…

Read the review →

DocuPost is web-based postal mailing software for businesses, freelancers, and teams that need to send physical letters, postcards, or business checks. Users can compose or upload PDF letters, create 4x6 or 6x9 postcards, import mailing…

Read the review →
  1. MailStreamDirect Mail Automation Software 8.8Free plan
  2. DocuPostDirect Mail Automation Software 8.7Free plan

Strengths and trade-offs

  • MailStream — where it wins

    • REST API, webhooks, and AI-agent MCP server
    • Variable-data personalization with reusable HTML/CSS templates
    • Address verification, USPS tracking, and radius-based targeting

    Where it doesn't

    • Delivery is currently focused on the US
    • Priority support starts with the $99 Pro plan
    • Enterprise features require a $499 monthly subscription

  • DocuPost — where it wins

    • Free plan supports letters and postcards with no send limits
    • Bulk CSV imports, merge fields, API sending, and USPS tracking
    • Supports letters, postcards, checks, and international mailing

    Where it doesn't

    • Check mailing requires the Premium plan
    • Enterprise features begin at $99.95 per month
    • Personalization level can vary by mailing workflow

More comparisons

All direct mail automation software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update