PostBrix
PostBrix is a browser-based email builder for creating responsive templates and preparing assets for campaigns.
What PostBrix is
PostBrix is a browser-based email builder for creating responsive templates and preparing assets for campaigns. Its drag-and-drop editor assembles emails from text, image, button, divider, and column blocks, without requiring HTML knowledge. Users can save headers, footers, and calls to action for reuse, and AI assistance can generate or refine email copy. Completed templates export as MJML or fully inlined HTML for use in existing email workflows. PostBrix names email services that accept those formats, including Mailchimp, HubSpot, SendGrid, and Klaviyo. Its documentation covers template rendering through a REST API, API key management, live previews, test emails, responsive checks, and rendering troubleshooting. The free tier limits users to five monthly exports, five daily downloads, three daily test emails, and ten lifetime AI generations. The company describes the product as a workspace for marketing teams, SaaS companies, and agencies creating business emails.
Good
- Visual editing does not require HTML knowledge
- Exports MJML and inlined HTML
- Reusable headers, footers, and calls to action
- Includes AI-assisted copy generation and refinement
- Free trial and free plan are available
Watch out
- Free plan allows five monthly exports
- Free plan limits AI to ten lifetime generations
- Free plan limits test emails to three daily
Who it suits
PostBrix is suited to marketing teams, SaaS companies, and agencies that build business emails and want reusable components or code exports. It can also suit teams integrating templates into workflows that accept HTML or MJML.
Verdict
PostBrix brings template building, reusable blocks, and export options into a browser-based workspace. The free tier has defined usage limits, while paid plans start at $9/mo.
Plans and prices
From PostBrix's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 3 projects · 1 workspace · 50 MB storage · 5 daily downloads · 3 daily test emails · 1-day version history · 3 versions · 10 lifetime AI credits · 5 monthly exports |
| Starter | $9 a month | 7-day free trial · 15 projects · 5 workspaces · 200 MB storage · unlimited daily downloads · 10 daily test emails · 7-day version history · 10 versions · unlimited monthly exports · 50 AI credits/month · $9/mo |
| Pro | $29 a month | 14-day free trial · 100 projects · 10 workspaces · 2,000 MB storage · 50 daily test emails · 30-day version history · 50 versions · 50,000 monthly API limit · 60 requests/minute · 250 AI credits/month · $29/mo |
| Enterprise | Priced on request | Unlimited projects and workspaces · 25,000 MB storage · 500 daily test emails · unlimited monthly spam checks and version history · 500,000 monthly API limit · 300 requests/minute · custom S3/MinIO storage · 2,000 AI generations/month · white labeling · Custom |
| Enterprise & Agency | Priced on request | Custom workspace · dedicated staging infrastructure · white labeling · custom asset catalogs · dedicated support-level agreements |
The facts
Each one read from PostBrix's own pages, with the date it was checked.
What it does
- AI assistance
- The product offers AI-assisted generation and refinement of email copy.checked 7 Oct 2026
- AI writing
- Built-in AI can generate and refine email copy, with usage controlled by plan credits.checked 15 Oct 2026
- API
- The documented REST API uses https://api.postbrix.com/v1 with Bearer API-key authentication and endpoints for rendering templates, listing projects, fetching project AST data and health checks.checked 15 Oct 2026
- API limits
- The Pro plan lists a 50,000-call monthly API allowance and a 60-request-per-minute rate limit.checked 15 Oct 2026
- Builder
- Its visual drag-and-drop editor uses blocks such as text, images, buttons, dividers, and columns without requiring HTML knowledge.checked 7 Oct 2026
- Compliance policies
- The legal center publishes policies covering GDPR, DPDP, PCI payments, acceptable use, deletion, refunds, subscriptions and subprocessors.checked 15 Oct 2026
- Documentation depth
- The documentation site reports 91 production guides across eight categories and covers API, JSON schema, rendering, integrations, testing and troubleshooting.checked 15 Oct 2026
- Dynamic templates
- Handlebars variables, conditions, loops and sample data are supported for personalized email output.checked 15 Oct 2026
- Email testing
- The documentation describes live preview, test emails, responsive checks, and rendering troubleshooting.checked 7 Oct 2026
- Exports
- Users can export production-ready MJML or fully inlined HTML for use in their existing email workflow.checked 7 Oct 2026
- HTML export
- Designs can be exported as production-ready, fully inlined HTML suitable for external email platforms.checked 15 Oct 2026
- Image studio
- An in-builder studio provides AI background removal, cropping presets, color adjustments, stickers and automatic WebP or PNG optimization.checked 15 Oct 2026
- Integrations
- Export guidance covers Mailchimp, SendGrid, Klaviyo, Brevo, HubSpot, Postmark, Customer.io, ActiveCampaign and Mailgun, plus Amazon SES compatibility on the homepage.checked 15 Oct 2026
- Licence
- The terms state that PostBrix software, interfaces, documentation and underlying technology are owned by PostBrix or its licensors; users receive service access rather than an open-source licence.checked 15 Oct 2026
- Limit: AI responsibility
- Users remain responsible for checking AI-generated content because PostBrix disclaims accuracy, legality and infringement warranties for AI output.checked 15 Oct 2026
- Limit: service warranty
- The terms disclaim uninterrupted availability, error-free operation and identical rendering across all email clients.checked 15 Oct 2026
- MJML export
- Users can download raw MJML source for developer-controlled build pipelines.checked 15 Oct 2026
- Notable limits
- The free plan includes 5 monthly exports, 5 daily downloads, 3 daily test emails, and 10 lifetime AI generations.checked 7 Oct 2026
- Product
- PostBrix is a browser-based email builder for creating responsive email templates and managing campaign-ready assets.checked 7 Oct 2026
- Responsive design
- PostBrix says its layouts are designed for mobile and desktop by default.checked 7 Oct 2026
The company
- Company legal identity
- The public About page identifies the operator simply as PostBrix and does not provide a separate registered legal entity name or founding year.checked 15 Oct 2026
- Company profile
- A LinkedIn profile using the PostBrix name lists Ahmedabad, Gujarat, India.checked 15 Oct 2026
- Headquarters
- Madhya Pradesh, Indiachecked 28 Sep 2026
Money
- Limit: free quotas
- The free tier caps exports at five per month, downloads at five per day, test emails at three per day and AI use at ten lifetime credits.checked 15 Oct 2026
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