#11 in Collaboration & CommunicationUpdated 2026-08

Inbox Zero

by Inbox Zero · AI email assistant that labels your inbox and drafts replies

60.7 — BenchRank score out of 100

Homepage
Pricing page

Visit website See full Collaboration & Communication ranking

Overview

Inbox Zero connects to a Gmail, Google Workspace or Outlook account and labels incoming mail into categories such as To Reply, Newsletter and Cold Email. It drafts replies based on your email history and calendar, blocks cold emails, files attachments to Google Drive or OneDrive, and adds bulk unsubscribe and email analytics. It runs alongside your existing email client.

Best for: Gmail or Outlook users wanting an AI assistant to label email and pre-draft replies
Pricing: No free plan; a 7-day trial on all tiers, then $20/user/month for Starter, $35 for Plus and $50 for Professional, with 10-20% off when billed annually and contact-sales pricing for Enterprise.
Runs on: WebmacOSSelf-hostedCLI

Strengths and trade-offs

Strengths

Open source, with self-hosting offered for full control
SOC 2 Type 2 certified; states no AI training on your data
Bulk unsubscribe and cold email blocking on every paid plan
Read, draft and manage email from Slack or Telegram

Trade-offs

Not an email client; runs alongside Gmail or Outlook
Only Gmail, Google Workspace and Outlook accounts are supported
No free plan — all paid tiers offer a 7-day trial only
Slack integration and attachment filing need the Plus tier or above
Teams integration is listed as coming soon

Pricing

Published plans from Inbox Zero’s own pricing page, in USD. Usage charges and add-ons may apply on top.

Inbox Zero pricing tiers, monthly and annual rates in USD
Plan	Monthly	Annual (per month)	Includes
Starter	$20per user	$18	Sorts and labels every email Drafts replies in your voice Blocks cold emails, bulk unsubscribe and archive Email analytics and pre-meeting briefings
Plus	$35per user	$28	Everything in Starter 2 email accounts included per user Slack integration and email digests Auto-file attachments, unlimited knowledge base
Professional	$50per user	$42	Everything in Plus Team-wide analytics Priority support Dedicated onboarding manager
Enterprise	Contact sales	—	SSO and SCIM On-premise deployment Dedicated account manager Custom pricing via sales

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
API quality: 75 out of 100
Documentation: 70 out of 100
Agent friendliness: 82 out of 100
Pricing transparency: 100 out of 100
Changelog: 40 out of 100
Marketing site structure: 95 out of 100
Operational trust: 35 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 25 out of 100

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