Unitpost

What is Unitpost?

Unitpost is an AI-first email and customer communication platform designed to handle everything from transactional emails (like OTPs, receipts, and alerts) to marketing campaigns in one unified system. Instead of using separate tools, it combines sending infrastructure, templates, audience management, and analytics into a single workflow that works via UI, API, or even AI agents. It uses a unique “shared sending balance” pricing model where you pay for usage rather than features, while still getting unlimited contacts and built-in marketing tools. Built for developers, startups, and product teams, Unitpost simplifies email operations and aims to replace fragmented communication stacks with one scalable, AI-powered system.

Engineered for modern developer toolchains, Unitpost bridges clean code and automated marketing workflows. Featuring an inbox-safe React and Tailwind email builder (@unitpost/email), synchronized visual drag-and-drop editing, and a hosted Model Context Protocol (MCP) server that allows coding assistants (Cursor, Claude, Windsurf) to draft, test, and send emails directly from the prompt, Unitpost charges strictly for send volume rather than list size, offering a free starter tier of 5,000 emails per month alongside paid plans starting from $30 per month.

• Platform Model: AI-First Transactional & Marketing Email Platform, REST API & MCP Server
• Pricing Philosophy: Flat send-based pricing with unlimited contacts on all paid tiers

Use Cases:

• Sending mission-critical transactional emails (password resets, magic links, receipts, order shipments) with low latency
• Drafting and broadcasting product updates, newsletters, and onboarding drips without paying contact penalties
• Connecting AI coding assistants (Claude Code, Cursor) via MCP to generate and send branded emails during agentic workflows
• Building responsive, inbox-safe email templates using modern React components and Tailwind styling
• Ingesting, parsing, and routing inbound customer email replies directly into application webhooks and database workflows

Technology:

• Hosted Model Context Protocol (MCP) server providing scoped tool endpoints for autonomous LLM agents
• React & Tailwind email rendering engine (@unitpost/email) outputting bulletproof, cross-client HTML table structures
• HMAC-signed webhook dispatcher retrying event notifications (delivered, opened, clicked, bounced) until acknowledged

Target Users:

• Full-stack engineers and SaaS builders looking for a single unified email API for all app communications
• Agentic AI developers seeking native MCP integration to empower coding assistants with real email execution
• Growth leads and product marketers tired of subscriber tiers penalizing audience list growth
• Technical founders migrating away from high-cost legacy providers (SendGrid, Mailgun, Postmark)

Acquisition: Operates as an independent developer tools and email infrastructure platform (Unitpost)

Key features of Unitpost

Unitpost's key features are

• Unified Transactional & Marketing Engine: Manage system password resets and multi-step marketing drips inside a single contact database and API.
• Native Model Context Protocol (MCP) Server: Connect Claude, Cursor, or custom AI agents to your Unitpost server using one URL and scoped API keys to safely draft and dispatch emails.
• React & Tailwind Email Builder: Author templates in visual mode or write TSX code using @unitpost/email; both surfaces maintain identical, inbox-safe output.
• Automatic Brand Kit Extraction: Paste your website URL to automatically import brand colors, logos, and typography for AI agents and templates to use.
• Unlimited Contacts on Paid Plans: Pay strictly for monthly send volume without being penalized or forced into higher pricing brackets as your subscriber list expands.
• Built-In Authentication & Deliverability: Simplified DNS verification covering DKIM, SPF, and DMARC records with continuous background reputation checks.
• Inbound Email Webhooks: Automatically parse incoming email replies into JSON payloads and route them into customer workflows and database models.
• Migration Assistant: Automated import tooling that maps and migrates templates, domains, and contact lists from Resend, SendGrid, Postmark, and Loops.

Unitpost Pricing

Unitpost operates on a send-volume pricing structure with a generous free plan, unlimited contacts on all paid tiers, and zero feature gating.

Free Plan:

• $0 / month: 5,000 emails per month (capped at 200 emails/day)
• Up to 10,000 contacts, 5 verified domains, full REST API, SMTP relay, official SDKs, and React/visual builders

Starter Plan:

• $30.00 / month: 50,000 emails per month (no daily sending cap)
• Unlimited contacts, 10 domains, 3 team seats, 5 webhooks, 10 API keys, and removal of Unitpost branding

Growth Plan:

• $200.00 / month: 250,000 emails per month
• Unlimited contacts, 100 domains, 10 team seats, 25 webhooks, 50 API keys, and priority deliverability routing

Enterprise Tier:

• Custom volume rates for teams sending 1M+ emails/month, dedicated IP pools, sub-account management, custom SLAs, and invoicing/ACH billing

Disclaimer: For upcoming SMS, WhatsApp, and Telegram multichannel additions, as well as enterprise dedicated IP arrangements, visit unitpost.com.

Who is using Unitpost?

Unitpost is used by modern software developers, creators, and engineering teams, including

• B2B SaaS Founders: Handling user activation emails, invoices, and weekly product newsletters within a single platform
• Full-Stack Developers: Building inbox-safe email designs in TypeScript and Tailwind without writing table-based HTML markup
• AI Agent Builders: Equipping coding assistants and autonomous agents with native MCP email sending and inbox reading capabilities
• Growth Engineers: Executing drip marketing campaigns and segmented broadcasts without incurring contact-tier penalties

Best Unitpost Alternatives

Some of the strongest Unitpost alternatives include

• Resend
• Postmark
• Loops
• SendGrid (Twilio)
• Brevo (formerly Sendinblue)
• Plunk

Pros and Cons of Unitpost

Pros

• Unifies transactional alerts and marketing drip campaigns into one platform, eliminating vendor sprawl
• Native Model Context Protocol (MCP) server allows AI agents to draft and send emails out of the box
• No contact penalties on paid tiers—bills strictly for emails sent rather than database size
• Modern developer experience supporting React, Tailwind, TSX, visual editing, and inbound parsing
• Free tier includes 5,000 emails per month across 5 domains with no credit card required

Cons

• Multi-channel SMS, WhatsApp, and Telegram features are currently marked as upcoming additions
• Free tier enforces a 200 emails/day cap, intended primarily for testing and development environments
• A newer infrastructure alternative compared to established legacy players like SendGrid or Postmark

Why Choose Unitpost?

Legacy email providers split your workflows into separate silos: one API for transactional receipts and a different expensive SaaS app for marketing broadcasts. Unitpost unifies your entire email infrastructure.

• Consolidates your transactional receipts and marketing newsletters into one clean API and list
• Integrates with modern AI coding assistants like Cursor and Claude via native MCP servers
• Stops the practice of charging extra just because your subscriber list grows
• Lets developers write email templates in React and Tailwind while non-technical team members use the visual builder

Unitpost vs. Competitors

The main difference between Unitpost, Resend, Loops, and Postmark lies in audience packaging and agent readiness. While Postmark restricts itself almost exclusively to transactional emails, Loops targets marketing emails with contact tiers, and Resend charges extra for marketing audiences, Unitpost provides both transactional and marketing email in a single system with unlimited contacts on paid tiers and a native MCP server for AI coding agents.

How do we rate Unitpost?

Unitpost Review

Unitpost solves a major inefficiency in developer communications by eliminating the boundary between transactional delivery and marketing broadcasts. By charging strictly for email send volume rather than subscriber list size, it removes the punitive pricing traps common to legacy email platforms. Unitpost is a top choice for developers in the AI era, thanks to its modern React/Tailwind template authoring, bulletproof inbound parsing, and native Model Context Protocol support for coding agents.

Conclusion

Unitpost is a modern, AI-native email platform that goes beyond traditional tools by turning email marketing and transactional messaging into a fully automated, agent-driven workflow. At its core is “Unit,” an AI teammate that can design templates, build segments, analyze deliverability, and even plan or schedule campaigns—all through simple natural language commands. Its biggest strength lies in operating directly inside the product, meaning it doesn’t just suggest ideas but actually executes tasks while still requiring user approval for critical actions, ensuring control and safety. Combined with a flexible pricing model where you pay mainly for sending rather than features, it simplifies both usage and cost structure.