Replai

Replai began as a ChatGPT-powered Chrome extension for social media replies, described as a way to create meaningful, personalized comments for LinkedIn and X roughly ten times faster. That extension is still listed publicly and remains the fastest way to use the tool inside a social feed: you open a post, click the icon, pick a style and tone, and get a shareable reply. In parallel, the replai.so web application has grown into a broader AI email assistant that connects to Gmail or Outlook and drafts replies in your own voice.

The core idea across both surfaces is personalization. Rather than handing you a generic AI paragraph, Replai builds a 'reply identity' from content you choose to share — your typical tone, the length you prefer, the phrases and sign-offs you actually use. That identity informs every draft, and the platform reports that most users send the first generated draft with little or no editing. Supporting features include automatic inbox sorting, a free email reply generator that needs no account, and a meeting-note companion that transcribes calls and summarises decisions.

Pricing follows a freemium pattern. The extension is free to install with optional in-app purchases, and the web assistant offers a free tier with a daily reply allowance plus a Pro plan for unlimited drafting and the full toolkit. Replai positions itself as a productivity layer that sits inside the tools you already use, so the value shows up as time saved rather than as a separate destination site.