RepliStack App

Write better replies in seconds.

Free trial

Paste the incoming email, choose a tone and length, and RepliStack generates a ready-to-send reply.

Upgrade to ProLog out

Incoming Email

If the message feels unclear or sensitive, generate a reply that asks for clarification before committing.

This field guides the reply draft; it is not a separate question box. Examples: “Reply as me and ask whether the provided link is required.” “Mention that I’m available next Tuesday.” “Keep it brief and friendly.” You can also ask for a cautious reply (e.g. verify details, avoid confirming assumptions, request clarification).

Email content is sent securely to RepliStack and OpenAI only to generate replies. We do not store inbox emails on our servers.

Reply Settings

Choose the tone and level of detail so the reply fits your style.

Style: not trained yet

Relaxed, warm and approachable. Great for casual, human conversations.

Free trial used: 0/100. Remaining: 100.

Replies today: 0. Total account replies: 0.

Your email is sent securely to OpenAI to generate the reply. We do not store inbox email threads on our servers. Style and support knowledge stay in your browser unless you include them in a request. Learn more about privacy.

Generated Reply

RepliStack replies in the same language as the incoming email.

If RepliStack saves you time, you can help by sharing it with a friend or posting about it. We’ll draft a short share message for you that you can edit before sending.

Train my writing style

Paste 2–5 of your real email replies. RepliStack analyzes style and saves the resulting style profile locally in your browser. We do not store your style samples on our servers.

Not trained yet

Support knowledge (optional)

Paste real customer questions and your factual answers. RepliStack learns ONLY the information you provide here and uses it to answer similar emails. Your saved knowledge base is stored locally in your browser.

Works in any language. RepliStack detects the email language and replies in the same language.

Accepted formats: Q: / A: or Question: / Answer:. You can freely mix languages and structures.

Not trained yet

Need to start fresh? Clear all local RepliStack data stored in this browser.

Removes your style, support knowledge, and other saved local data from this browser.