Mail Designer 365 vs PostBrix
Mail Designer 365
maildesigner365.comPostBrix
postbrix.comSide by side
| Figure | Mail Designer 365 | PostBrix |
|---|---|---|
| Price from | $5/mo | $9/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| macOS | Yes | — |
| API | Yes | Yes |
| Plans published | 7 | 8 |
| Spec score · Email Design Software | 8.2 (#14) | 8.5 (#8) |
| Headquarters | Karlsfeld/Munich, Germany | Madhya Pradesh, India |
| Integrations | The product supports importing contacts using a Mailchimp or Campaign Monitor API key, and its API can fill design placeholders and send emails automatically, including from FileMaker workflows. | Export guidance covers Mailchimp, SendGrid, Klaviyo, Brevo, HubSpot, Postmark, Customer.io, ActiveCampaign and Mailgun, plus Amazon SES compatibility on the homepage. |
| Product | Mail Designer 365 is a Mac email design app for creating and sending branded email campaigns. | PostBrix is a browser-based email builder for creating responsive email templates and managing campaign-ready assets. |
| Support | The company offers one-to-one support from its team and describes it as in-house, without chatbots or outsourcing. | Support is offered through [email protected], and the careers page identifies the operating location as Madhya Pradesh, India. |
Plans
Mail Designer 365
- KarlsfeldFree
- Mail Designer Essentials$5 a month
- CapetownPrice not published
- LondonPrice not published
- ParisPrice not published
- RomaPrice not published
- SeoulPrice not published
PostBrix
- FreeFree
- FreeFree
- Starter$9 a month
- Starter$9 a month
- Pro$29 a month
- Pro$29 a month
- EnterprisePriced on request
- Enterprise & AgencyPriced on request
In their own words
Mail Designer 365
Mail Designer 365 is a Mac app for designing and sending branded email campaigns. Its visual drag-and-drop editor builds responsive newsletters from text, images, buttons, links, and layout blocks without code. The gallery lists 291 newsletter templates, and the app creates a mobile-optimized design version with a preview. Campaign tools include scheduling, contact import, audience segmentation, and reports on opens, clicks, unsubscribes, and bounces. Contacts can be imported with a Mailchimp or Campaign Monitor API key; the API can populate design placeholders and send messages automatically, including from FileMaker workflows. Each API delivery uses 25 stamps, while regular campaign delivery starts at one stamp per recipient. Browser participants, including Windows users, can preview and discuss drafts, but shared-design editing requires the Mac app and a plan. The free Karlsfeld plan includes 500 stamps monthly and up to 20 editable designs; designs beyond that can be viewed but not edited or saved. Mail Designer Essentials costs $5 a month, and a 7-day trial is listed.
PostBrix
PostBrix is a browser-based email builder for producing responsive templates and organizing assets for campaigns. Its visual editor lets users arrange text, images, buttons, dividers, and columns without writing HTML. Layouts are designed for mobile and desktop, and saved headers, footers, and calls to action can be reused across projects. The product can help generate or refine email copy with AI, then export templates as MJML or fully inlined HTML for an existing workflow. PostBrix says its exported code works with services that accept HTML or MJML, including Mailchimp, HubSpot, SendGrid, Brevo, Postmark, Amazon SES, Klaviyo, Customer.io, ActiveCampaign, and Mailgun. The documentation also describes REST API rendering and key management, live previews, test emails, responsive checks, and rendering troubleshooting. A free plan and free trial are available; paid plans start at $9/mo. The free tier is limited to five monthly exports, five daily downloads, three daily test emails, and ten lifetime AI generations.