Inkit vs MailStream
Inkit
inkit.com
MailStream
mailstream.appSide by side
| Figure | Inkit | MailStream |
|---|---|---|
| Price from | $20/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 0 |
| Spec score · Direct Mail Automation Software | 9.2 (#1) | 7.3 (#18) |
| Compliance | Inkit says it supports SOC 2 and HIPAA compliance and that enterprise customers can have IL4/IL5 compliance. | The company describes annual SOC 2 Type 2 audits, HIPAA-compliant handling and BAAs for healthcare clients, and support for CCPA and GDPR requirements. |
| Integrations | Inkit lists Google Drive, Dropbox, Box, AWS S3, CRM systems, cloud platforms, and Office 365 templates as integration options. | The integrations page describes Planning Center as available and lists several others, including Shopify, Zapier, Make, and n8n, as coming soon. |
| Intended users | Inkit describes plans for individuals, solo professionals, growing teams, and high-volume organizations with advanced compliance needs. | The about page describes MailStream as physical-mail infrastructure for AI agents, agencies, SaaS teams, and business operators. |
| Product | Inkit combines digital signatures, document generation, workflows, and document storage in one platform. | MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters. |
| Security | Inkit describes end-to-end encryption, role-based access controls, MFA, and immutable audit trails. | 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 | The pricing page directs support questions to [email protected]. | The security page says MailStream will share SOC 2 reports, complete security questionnaires, and arrange calls with its security team. |
| What it does | Inkit combines document generation, digital signatures, workflow automation, storage, search, and records management in one file-intelligence platform. | MailStream provides a self-serve platform, REST API, and MCP server for sending physical postcards and letters. |
Plans
Inkit
- FreeFree
- FreeFree
- Personal$20 a month
- Standard$30 a month
- EnterprisePriced on request
In their own words
Inkit
Inkit combines digital signatures, document generation, workflows, and document storage in a web and API platform. Reusable templates turn CRM data, spreadsheets, or API inputs into contracts, invoices, and NDAs. Its legally binding signatures include a certificate of completion and signer history, while File Intelligence can search for files and extract, organize, and route document data. The company describes native integrations and an API, with Salesforce and Amazon S3 apps listed in its documentation. Security features include end-to-end encryption, role-based controls, MFA, and immutable audit trails. Inkit says it supports SOC 2 and HIPAA compliance, with IL4/IL5 compliance available to enterprise customers. Automated records-retention schedules and policies are also supported. The free plan costs nothing and includes three signature requests per month, one seat, and 10GB of storage. Listed plans include Personal at $20 a month and Standard at $30 a month; Enterprise pricing is customizable. The pricing note says paid plans start at $15/user/mo and includes a 30-day trial; the comparison also lists 14-day and 30-day trials for paid plans.
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.