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Head-to-head · Direct Mail Automation Software

Stannp vs MailStream

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Stannp #4 in Direct Mail Automation Software 8.9/10 Free plan Free plan✓ 2 of 2 features Visit Stannp
MailStream #5 in Direct Mail Automation Software 8.8/10 Free plan Free plan✓ 2 of 2 features Visit MailStream

Stannp leads on 1 check, MailStream on 0, and 3 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreStannp · 8.9/10
  • Lowest starting priceStannp · $12/mo
  • Free planboth

Stannp scores higher on our rubric for direct mail automation software: 8.9 against 8.8 out of 10; our editors rank them #4 and #5.

Stannp is cheaper to start at $12/mo against $99/mo. On delivery scope, Stannp gives you Both where MailStream offers Domestic.

Stannp is the better fit for campaign-focused marketers needing tracking. MailStream is the better fit for API-first postcard and letter automation.

  • Stannp fits best

    Campaign-focused marketers needing tracking

  • MailStream fits best

    API-first postcard and letter automation

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 Stannp 8.9/10 Visit ↗ MailStream 8.8/10 Visit ↗
At a glance
Editor score 8.9 8.8
Ranking #4 in Direct Mail Automation Software #5 in Direct Mail Automation Software
Best for Campaign-focused marketers needing tracking API-first postcard and letter automation
Pricing model Free plan + paid Free plan + paid
Starting price $12/mo (best) $99/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Email, Live chat, Phone, Docs Email, Docs
Integrations 1,000+ integrations 11 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Stannp 2/2 · MailStream 2/2
API access ✓ ✓
Address verification ✓ ✓
Specs
Mail formats postcards, letters, self-mailers 4×6, 6×9, and 6×11 postcards; 8.5×11 letters
Personalization level Variable Variable
CRM connections HubSpot, Klaviyo Planning Center, HubSpot, Salesforce, GoHighLevel, ActiveCampaign
Delivery scope Both Domestic
Our review
Pros
  • Supports postcards, letters, and self-mailers with variable printing
  • Tracks mail and reports engagement across campaigns
  • Connects with HubSpot, Klaviyo, Zapier, Make.com, and REST API
  • REST API, webhooks, and AI-agent MCP server
  • Variable-data personalization with reusable HTML/CSS templates
  • Address verification, USPS tracking, and radius-based targeting
Cons
  • Enterprise pricing is bespoke rather than publicly listed
  • Free is limited to one-off campaigns
  • Higher tiers add significant monthly costs for growing teams
  • Delivery is currently focused on the US
  • Priority support starts with the $99 Pro plan
  • Enterprise features require a $499 monthly subscription
Our verdict

Stannp is a direct mail automation platform for businesses that need to design, personalize, schedule, send, and track physical mail campaigns. It supports postcards, letters, and self-mailers, making it suitable for marketing,…

Read the review →

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 →
  1. StannpDirect Mail Automation Software 8.9Free plan
  2. MailStreamDirect Mail Automation Software 8.8Free plan

Strengths and trade-offs

  • Stannp — where it wins

    • Supports postcards, letters, and self-mailers with variable printing
    • Tracks mail and reports engagement across campaigns
    • Connects with HubSpot, Klaviyo, Zapier, Make.com, and REST API

    Where it doesn't

    • Enterprise pricing is bespoke rather than publicly listed
    • Free is limited to one-off campaigns
    • Higher tiers add significant monthly costs for growing teams

  • 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

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