Kerna's IntelligencePowered by OpenAI.
Designed explicitly for Gmail. Kerna integrates GPT-4 & GPT-5 reasoning directly into your Google Workspace for 45-language translation and structured workflow automation.
Serious capability, no compromises.
Frontier reasoning, zero data retention, and 45 languages — the foundation under every email Kerna handles, hosted entirely in the EU.
Engineered for the inbox.
The world's most advanced reasoning, brought into the place you already work. No tab-switching, no copy-paste — every capability runs natively in your Gmail sidebar.
Native-Level Translation
Break language barriers without breaking confidentiality. Write in English and send in flawless Spanish, French, German, Polish, or Japanese — across 45 languages, tuned per language rather than machine-translated.
- 45 languages
- Bidirectional translation
- Business-grade accuracy
Structured Drafting
Start from 200 purpose-built templates — cold outreach, follow-ups, reminders, and more — each backed by an industry-aware brief that steers tone, structure, and detail. Kerna drafts a complete, ready-to-refine email from the brief in one click.
- 200 templates
- Industry-aware briefs
- Formal & casual modes
Tone & Polish
Make every message land the way you intend. Rewrite a rough draft to sound more confident, more empathetic, or more concise — then review it before you ever hit send.
- Grammar correction
- Tone adjustment
- Clarity improvements
Executive Summaries
Skip the whole thread. Kerna reads the last 50 messages and returns a structured brief with the key points and action items.
- Bullet-point briefs
- Action-item extraction
- Thread-history analysis
Context-Aware Replies
Drafts that actually make sense — Kerna reads the prior messages so replies stay relevant, polite, and on-tone.
- One-click drafting
- Matches your tone
- References prior detail
Smart Extraction
Never miss a detail. Kerna detects dates, meeting times, contacts, and tasks buried in long, messy threads.
- Calendar-sync ready
- Contact capture
- Deadline detection
- Task listing
“Hi — let's loop in Sarah Chen and meet Tuesday 2 PM to review the budget deck before Friday.”
Two workflows. One sidebar.
Whether you're answering what just landed or writing the next message from scratch, Kerna handles it right where you already work — no tabs, no copy-paste, no data leaving the EU.
Reply Assistant
Respond to what's in your inbox
Open the email
Click Kerna in the sidebar — it has already read the whole thread.
Pick an action
Summarize, reply, or translate. A draft appears in seconds, matched to the conversation.
Review & send
Tweak a word if you like, then send — in any of 45 languages.
Compose Assistant
Start a new message from scratch
Start composing
Open the compose assistant on a blank email — no template hunting.
Choose a template
Pick from 200 expert briefs — cold outreach, follow-ups, reminders — and add a detail or two.
Review & send
Kerna writes one complete, on-brief draft. Polish it and send.
Simple, transparent pricing.
Choose the level of intelligence you need. Upgrade or cancel anytime.
Starter
Test the connection. Limited capacity for new users.
- 50,000 Tokens (Trial Volume)
- GPT-4
- Basic Reply Functionality
- Single User License
Standard
Essential AI for daily productivity.
- 500,000 Tokens (Standard Usage)
- GPT-5
- Basic Summaries & Translation
- Single User Only
Pro
Advanced tools for high-volume professionals.
- 1,000,000 Tokens (Power Usage)
- Advanced Improvement
- Perfect Native-Level Writing
- Single User Only
Business
Collaborate and scale with your team.
- 7,500,000 Tokens (~Shared Pool)
- Includes 5 Team Seats
- Shared Prompts & Billing
- No Wasted Credits
Enterprise
Scale and compliance for larger organizations.
- 50,000,000 Tokens (Shared Pool)
- Includes 25 Team Seats
- Processing Log + CSV Export
- Priority Contact
Need more than 25 seats or 50M tokens?
Custom volume contracts, dedicated infrastructure, and tailored SLAs for large organizations.
Ready to upgrade your workflow?
Stop switching tabs. Experience the power of GPT-5 with zero content retention. Join professionals who save 10+ hours a week.