PostBrix

Free plan APIWeb

What PostBrix is

PostBrix is a browser-based email builder for making responsive templates and organizing campaign assets. Its drag-and-drop editor lets users assemble messages from text, image, button, divider, and column blocks without HTML knowledge. Layouts are designed for mobile and desktop, and headers, footers, and calls to action can be saved as reusable blocks. AI tools can help generate and refine email copy. Finished templates can be exported as production-ready MJML or fully inlined HTML for an existing email workflow. PostBrix says its exported code works with email service providers that accept HTML or MJML, naming Mailchimp, HubSpot, SendGrid, Brevo, Postmark, Amazon SES, Klaviyo, Customer.io, ActiveCampaign, and Mailgun. Documentation describes rendering templates through a REST API, managing API keys, 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 plan allows five monthly exports and ten lifetime AI generations, among other limits.

Who it suits

PostBrix suits marketing teams, SaaS companies, and agencies creating business emails. It can also fit teams that want to export templates into an existing email workflow or render them through an API.

What it does well

Drag-and-drop editor needs no HTML knowledge
Exports MJML and inlined HTML
Reusable headers, footers, and calls to action
Includes a free plan and free trial

What to know first

Free plan allows five monthly exports
Free plan allows ten lifetime AI generations
Free plan limits test emails to three daily

Limits

The free plan includes 5 monthly exports, 5 daily downloads, 3 daily test emails, and 10 lifetime AI generations. It also has 3 projects, 1 workspace, and 50 MB of storage.

Plans

Plan	Billed and limits	Price
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	Free
Pro	$29/mo · 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 a month
Starter	$9/mo · 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 a month
Enterprise	Custom · 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	On request
Enterprise & Agency	Custom workspace · dedicated staging infrastructure · white labeling · custom asset catalogs · dedicated support-level agreements	On request

As postbrix.com lists them, read 15 Oct 2026. The maker's own page has the final word.

Getting started

Open the PostBrix website in a browser.
Create a responsive email with the drag-and-drop editor and its content blocks.
Save headers, footers, or calls to action as reusable blocks if needed.
Use the free plan or free trial to get started.
Export the finished template as MJML or fully inlined HTML for your workflow.
Use the REST API documentation to render templates or manage API keys.

Verdict

PostBrix combines visual email creation with reusable content, AI copy assistance, and code exports. The free plan has defined usage limits; paid plans start at $9/mo.

Questions

How much does PostBrix cost?

The Free plan costs nothing. Starter is $9 a month, billed $9/mo, and Pro is $29 a month, billed $29/mo. Enterprise pricing is custom.

Is there a free plan or trial?

Yes. PostBrix offers a free plan and a free trial.

Which platforms does PostBrix support?

PostBrix is browser based, with web and API listed as platforms.

Can I export email templates?

Yes. Templates can be exported as MJML or fully inlined HTML. PostBrix names email services that accept HTML or MJML as compatibility examples.

Does PostBrix offer an API?

Its documentation describes rendering templates over a REST API and managing API keys.

Who makes PostBrix?

PostBrix lists its headquarters in Madhya Pradesh, India.

Facts from PostBrix's own pages

AI assistance: The product offers AI-assisted generation and refinement of email copy. · postbrix.com, 7 Oct 2026
AI writing: Built-in AI can generate and refine email copy, with usage controlled by plan credits. · postbrix.com, 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. · postbrix.com, 15 Oct 2026
API limits: The Pro plan lists a 50,000-call monthly API allowance and a 60-request-per-minute rate limit. · postbrix.com, 15 Oct 2026
Builder: Its visual drag-and-drop editor uses blocks such as text, images, buttons, dividers, and columns without requiring HTML knowledge. · postbrix.com, 7 Oct 2026
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. · postbrix.com, 15 Oct 2026
Company profile: A LinkedIn profile using the PostBrix name lists Ahmedabad, Gujarat, India. · in.linkedin.com, 15 Oct 2026
Compliance policies: The legal center publishes policies covering GDPR, DPDP, PCI payments, acceptable use, deletion, refunds, subscriptions and subprocessors. · postbrix.com, 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. · postbrix.com, 15 Oct 2026
Dynamic templates: Handlebars variables, conditions, loops and sample data are supported for personalized email output. · postbrix.com, 15 Oct 2026
Email testing: The documentation describes live preview, test emails, responsive checks, and rendering troubleshooting. · postbrix.com, 7 Oct 2026
Exports: Users can export production-ready MJML or fully inlined HTML for use in their existing email workflow. · postbrix.com, 7 Oct 2026
Headquarters: Madhya Pradesh, India · postbrix.com, 28 Sept 2026
HTML export: Designs can be exported as production-ready, fully inlined HTML suitable for external email platforms. · postbrix.com, 15 Oct 2026
Image studio: An in-builder studio provides AI background removal, cropping presets, color adjustments, stickers and automatic WebP or PNG optimization. · postbrix.com, 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. · postbrix.com, 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. · postbrix.com, 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. · postbrix.com, 15 Oct 2026
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. · postbrix.com, 15 Oct 2026
Limit: service warranty: The terms disclaim uninterrupted availability, error-free operation and identical rendering across all email clients. · postbrix.com, 15 Oct 2026
MJML export: Users can download raw MJML source for developer-controlled build pipelines. · postbrix.com, 15 Oct 2026
Notable limits: The free plan includes 5 monthly exports, 5 daily downloads, 3 daily test emails, and 10 lifetime AI generations. · postbrix.com, 7 Oct 2026
Product: PostBrix is a browser-based email builder for creating responsive email templates and managing campaign-ready assets. · postbrix.com, 7 Oct 2026
Responsive design: PostBrix says its layouts are designed for mobile and desktop by default. · postbrix.com, 7 Oct 2026

Where PostBrix stands on Freedom251

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