Respondable | Boomerang for Gmail vs IntelliMail

Respondable is an email assistant built into Boomerang for Gmail that scores drafts as you type. It predicts how likely a message is to get a reply and explains which factors drive that score, drawing on patterns from millions of sent emails. The tool surfaces tips on tone, including politeness, positivity, and subjectivity, so you can adjust wording before hitting send.

Most Gmail users guess at tone and hope for a response. Respondable gives live feedback inside the compose window instead of waiting for silence. That makes it especially useful for outreach to clients, follow-ups with your manager, and any thread where a missed reply costs time.

Sales reps, recruiters, and anyone living in Gmail who needs higher reply rates are the core audience. Respondable ships as part of the Boomerang extension, which also covers send-later, reminders, and inbox pause. Boomerang reports more than 1 million businesses on the platform and SOC 2 Type 2 certification on its main site.

IntelliMail ships as a Chrome extension that drafts full emails from the context you provide, so you skip blank-message typing in the browser. The intellimail.xyz landing page links straight to the Chrome Web Store listing and positions the tool as a personal email assistant.

Many email helpers only suggest snippets inside a web app. IntelliMail installs as a browser extension and generates complete messages after you add context, with a public pledge that the team does not read or store your data on intellimail.xyz.

Professionals who write thank-you notes, internship outreach, and routine replies in Chrome are the natural fit. The site keeps the workflow minimal: download the extension, open your mail client, add context, and generate.

The product is marketed as free on the Chrome Web Store page linked from the homepage. Optional support runs through a Buy Me a Coffee link, and feedback goes to an Airtable form also linked on the site.

IntelliMail.xyz runs on Wix with React, Chakra UI, Cloudflare, Hotjar, and Sentry detected in the page bundle. Version 1.6.9 was the last Chrome Web Store update noted on the linked listing when this page was reviewed.