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About this app

Gravbox is a modern custom-domain email platform built for professionals, freelancers, startups, agencies, and small teams.

Connect your own domain, create professional email addresses, manage mailboxes, and access your inbox through a clean and fast webmail experience.

With Gravbox, you can:

• Use professional email addresses with your own domain
• Read, compose, reply to, forward, archive, and organize emails
• Create and manage mailboxes for your team
• Configure MX, SPF, DKIM, and DMARC records with guided setup
• Protect your inbox with spam and phishing filtering
• Use multiple themes for a personalized inbox experience

Gravbox also includes optional AI-powered writing tools. You can connect your own OpenAI, Gemini, or Groq API key to:

• Draft email replies
• Improve grammar and clarity
• Change the tone of a message
• Translate email content
• Summarize long conversations

Your AI provider charges you directly for usage, so you remain in control of your API key and costs.

Gravbox is designed to provide a focused, ad-free email experience without unnecessary office-suite tools. It is suitable for anyone who wants professional business email with a simple interface, reliable mailbox management, and optional AI assistance.

Some features, mailbox limits, storage capacity, and sending limits may depend on your selected Gravbox plan.
Professional custom-domain email with fast webmail and optional AI tools
Updated on
Aug 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, Financial info and 6 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Welcome to GravBox – Fast, bloat-free custom domain email for professionals, freelancers, and growing teams.

Key Features:
• BYOK AI: Connect your own Gemini, OpenAI, or Groq API keys for smart composing and summarization with zero markup.
• Pro Deliverability: Automated real-time verification for SPF, DKIM, and DMARC to keep you out of the spam folder.