Growmail vs MailStream
Growmail
growmail.com
MailStream
mailstream.appSide by side
| Figure | Growmail | MailStream |
|---|---|---|
| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 1 | 0 |
| Spec score · Direct Mail Automation Software | 7.9 (#8) | 7.3 (#18) |
| Audience | Growmail describes serving local businesses, franchises, and brands including home services businesses. | MailStream describes itself as serving developers, AI agents, teams, agencies, SaaS businesses, and operators automating direct mail. |
| Integrations | Direct Mail Manager lists Salesforce, Shopify, Intuit, Capsule, Planning Center, and Zapier, and supports other CRMs with webhooks or API calls. | The integrations page describes Planning Center as available and lists several others, including Shopify, Zapier, Make, and n8n, as coming soon. |
| Security | The privacy policy says the company uses commercially reasonable technical, administrative, and physical safeguards, SSL encryption for order information, and password-protected databases. | The security page states that API traffic uses TLS 1.2+, customer data and artwork use AES-256 encryption at rest, and PII is access-controlled and purged on set retention schedules. |
| Support | Growmail offers marketing consultations and says its support team can advise customers on product selection and campaigns. | The security page says MailStream will share SOC 2 reports, complete security questionnaires, and arrange calls with its security team. |
| What it does | Growmail provides print and direct mail services to help businesses send postcards and mailers to targeted audiences. | MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters. |
Plans
In their own words
Growmail
Growmail provides print and direct-mail services for businesses sending postcards, brochures, flyers, and letter mailers to selected audiences. Targeting can use neighborhood, ZIP code, route, demographics, income, or interests. Products include Every Door Direct Mail, targeted direct mail, and Discount Zone mailers, with QR-code and call-tracking add-ons for campaign measurement. The Direct Mail Manager API syncs customer data, personalizes postcards, and triggers sends from customer actions. Listed connections include Salesforce, Shopify, Intuit, Capsule, Planning Center, and Zapier; other CRMs can connect through webhooks or API calls. Direct Mail Manager states that it has no batching or minimums and guarantees mailing within 48 hours. Most campaigns are produced and mailed within 5–7 business days after proof approval, and every order includes a digital proof requiring approval. Growmail mails across the continental United States, Hawaii, Alaska, Puerto Rico, and the U.S. Virgin Islands. Pricing is on request, with a New Mover Direct Mail option at $69.95, paid once for a minimum of 100 mailers.
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.