Inbox Zero vs InboxPro

Inbox Zero connects to Gmail or Outlook and uses AI to label incoming mail, draft replies in your voice, and surface what needs attention first. You get pre-written responses waiting when you open your inbox, plus bulk unsubscribe tools for newsletters you never read. The product works on web, iOS, Android, Slack, and Telegram so you can triage mail without living in your email tab.

Most email assistants stop at summarization. Inbox Zero also blocks cold emails, files attachments automatically on higher tiers, and pulls calendar and CRM context into drafts so scheduling replies match your real availability. The codebase is open source with 9k GitHub stars, SOC 2 Type 2 certification, and a self-host option for teams that want full control.

Starter plans cover solo operators who want labels, analytics, and reply drafts. Plus adds Slack, Notion, Stripe integrations, and an unlimited knowledge base. Professional adds team analytics and dedicated onboarding. Over 20,000 professionals use Inbox Zero, and every paid plan includes a 7-day free trial.

InboxPro is an email assistant built around a Gmail browser extension that bundles outreach, scheduling, and inbox analytics in one workflow. You get GPT-3 powered Magic Compose and Summarize inside Gmail, plus follow-up sequences, merge tags, open and link tracking, saved templates, and a built-in booking calendar. The product targets sales reps and small teams who live in Gmail and want fewer tabs open.

Where most Gmail add-ons pick one job, InboxPro stacks prospecting and closing tools together. Mailtrack-style tracking, Lemlist-style sequences, and Calendly-style scheduling all sit behind the same dashboard, with a free tier that still includes limited AI writing. That breadth trades depth in any single category for a single login and one contact list.

Salespeople, founders doing outbound, and customer success reps who send repetitive follow-ups get the most from it. Import contacts from Gmail, personalize with merge tags, automate multi-step sequences, and let prospects book meetings from a public calendar page connected to Google, Office 365, Outlook, or iCloud.