hi-ai

3-Second Reply Generation

Generate professional email replies in 3 seconds that match the conversation context and your personal writing style.

Gmail & Outlook Integration

Connects directly with Gmail and Outlook. Review AI-generated responses before sending — you always stay in control.

Writing Style Matching

AI learns your tone, vocabulary, and formatting preferences to generate replies that genuinely sound like you wrote them.

Customer Data Enrichment

Connect a customer spreadsheet to automatically enrich AI responses with relevant customer data when they email you.

Selective Email Access

You choose which emails the AI can read and reply to — never your entire inbox. Privacy by design.

Full Encryption

All passwords, access tokens, and email content are fully encrypted. Nothing is stored permanently on hi ai servers.

Customer Service Focus

Handles order inquiries, support requests, and FAQs 10x faster with contextually aware AI responses.

Dynamic Data Loading

Emails are loaded dynamically only when you're signed in — nothing persists after you log out.

Fyxer

More comprehensive inbox management with meeting notes and organization features

SmartWriter

Better for cold email outreach and personalized prospecting

MailMaestro

Stronger email triage and prioritization with multi-language support

Shortwave

Full AI-powered email client replacement with search and automation

hi ai takes a refreshingly simple approach to AI email assistance. Instead of trying to be an entire email client, it focuses on one thing: generating fast, contextual, personalized email replies. The privacy-first design — selective email access, full encryption, no permanent storage — addresses the biggest concern people have about AI reading their inbox. The 3-second reply generation with writing style matching produces responses that genuinely feel natural, not robotic. For professionals drowning in email who need quick, accurate replies without sacrificing their personal voice, hi ai is a smart, lightweight solution. Rating: 4.0/5

Is hi ai free?

Yes, hi ai offers a free tier with up to 10 AI-generated email replies per day. Pro plans with unlimited replies start at approximately $10/month.

Does hi ai read my entire inbox?

No. You choose which specific emails hi ai can access and respond to. The AI never reads your entire inbox — selective access is a core design principle.

Is my email data safe with hi ai?

Yes. All data is fully encrypted, emails are loaded dynamically only when you're signed in, and nothing is stored permanently on hi ai's servers. Privacy by design.

Which email providers does hi ai support?

hi ai integrates with Gmail (free tier) and Outlook (Pro tier). Direct integration means no copy-pasting between apps.

How does hi ai match my writing style?

hi ai analyzes your previous emails to learn your tone, vocabulary, formatting preferences, and communication patterns. Over time, generated replies increasingly match your natural writing voice.

Can hi ai handle customer support emails?

Yes, hi ai is particularly strong for customer service use cases. It handles order inquiries, support requests, and FAQs 10x faster by understanding the full conversation thread and pulling relevant customer data.

What is customer data enrichment?

On the Business plan, you can connect a spreadsheet containing customer information. When a customer emails you, hi ai automatically incorporates relevant data (order history, account details, etc.) into the generated reply.

How fast is hi ai's reply generation?

hi ai generates contextual email replies in approximately 3 seconds. The response includes proper formatting, appropriate tone, and relevant conversation context.