Modular Mail vs PostBrix
Modular Mail
modular-mail.comPostBrix
postbrix.comSide by side
| Figure | Modular Mail | PostBrix |
|---|---|---|
| Price from | £59/mo | $9/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 3 | 8 |
| Spec score · Email Design Software | 7.5 (#34) | 8.5 (#8) |
| HTML export | Users export production-ready HTML to upload to their existing email service provider; Modular Mail is not an email sending platform. | Designs can be exported as production-ready, fully inlined HTML suitable for external email platforms. |
| Integrations | The maker lists Mailchimp, HubSpot, Salesforce, Klaviyo, Constant Contact, ActiveCampaign, Marketo, Braze, SendGrid, Campaign Monitor, Pardot, Iterable, Bloomreach, Customer.io, Mailgun and iHotelier, plus any platform that sends HTML email. | Export guidance covers Mailchimp, SendGrid, Klaviyo, Brevo, HubSpot, Postmark, Customer.io, ActiveCampaign and Mailgun, plus Amazon SES compatibility on the homepage. |
| Product | Modular Mail is an email content management system where teams build campaigns by filling editable fields in templates with locked structure. | PostBrix is a browser-based email builder for creating responsive email templates and managing campaign-ready assets. |
| Support | Studio includes standard email support, Business includes priority support, and Enterprise includes dedicated onboarding and account support. | Support is offered through [email protected], and the careers page identifies the operating location as Madhya Pradesh, India. |
Plans
Modular Mail
- Studio£59 a month
- Business£349 a month
- EnterprisePriced on request
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
Modular Mail
Modular Mail has no write-up on Specifiction yet; its figures are above.
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.