Every professional knows the feeling: you open an email thread with 14 replies, scroll through the history, piece together what happened, and then type a careful response. It takes 10 minutes for a 3-sentence reply.
The Problem with Generic AI Replies
Most AI assistants generate replies based on the last message only. They miss context. They suggest "Thanks for your email!" when the sender is clearly frustrated. They miss the deadline mentioned six messages ago.
Kerna works differently. When you click Reply, the add-on reads the entire conversation thread — up to 50 messages deep — and builds a contextual understanding of what has been discussed, what was agreed upon, and what the sender is expecting.
How It Works
- 1Thread Analysis — Kerna scans the full conversation, identifying key decisions, open questions, and action items from previous messages.
- 2Tone Matching — The AI detects whether the conversation is formal, casual, or somewhere in between, and mirrors that register in its draft.
- 3One-Click Generation — A complete reply appears in your compose window. Edit it, adjust it, or send it as-is.
Real-World Example
Imagine a vendor emails asking for an updated delivery schedule. The original timeline was discussed three weeks ago across multiple messages. Instead of digging through the thread, Kerna pulls the relevant dates, references the original agreement, and drafts a reply that says: "Per our discussion on January 15th, the revised timeline has delivery shifted to March 3rd. I've attached the updated schedule."
Why This Matters
The average knowledge worker sends 40 emails per day. If Kerna saves even 2 minutes per reply, that is over an hour reclaimed daily — time redirected from mechanical typing to strategic thinking.
Smart Replies are available on all plans. The free Starter tier includes basic reply functionality with GPT-4. Upgrade to Standard or above to unlock GPT-5 for more nuanced, context-aware responses with deeper thread understanding.