SaneBox vs Shortwave vs Superhuman Mail

Written head to head: Superhuman Mail vs Shortwave, with when to choose each side.

Compared on	SaneBox Free trial · from $5.42/mo VisitRemove	Shortwave Free plan · from $18/seat/mo VisitRemove	Superhuman Mail From $25/member/mo VisitRemove
What it is	Email filtering service that sorts less important mail into separate folders	AI email client for Gmail and Google Workspace accounts	AI email app for teams that use Gmail or Outlook
Free plan	No	Basic AI with a limited usage quota; 90 days of standard and AI search history; up to 15 threads per AI search; basic inbox settings; adds a 'Sent with Shortwave' email signature.	No
Cheapest paid plan	$5.42/mo billed annually (Snack)SaneBox pricing	$18/seat/mo (Pro)Shortwave pricing	$25/member/mo billed annually (Starter)Superhuman Mail pricing
What it covers	1 email account and 2 SaneBox features; $4.54 per month when paid every two years. Educational, non-profit and government agencies can get 25% off.	Listed as $18 per seat/month on the Individual tab; the pricing page shows no annual billing option.	Mail is also included in the Superhuman suite Business plan ($40 monthly, or $33 per member/month billed annually), which bundles Mail, Grammarly, Docs and Go.
Free trial	7-day free trial with all features for up to 4 email accounts	14-day free trial of paid plans	None stated
Platforms	iOS, Android	Web, macOS, Windows, iOS, Android	macOS, Chrome extension
Integrations (vendor's figure)	Not stated	Not stated	Not stated
Open source	No	No	No
Good for	Cutting inbox clutter without switching email apps Keeping newsletters out of the main inbox Cleaning up a long-neglected inbox	Finding old emails and attachments by asking questions in plain English Sorting a busy Gmail inbox automatically with AI filters Sharing and assigning customer email threads within a small team	Working through a heavy Gmail or Outlook inbox faster Drafting routine replies with AI Sales teams viewing CRM records next to email
Watch out for	No free plan; only a 7-day trial Snack covers 1 email account with 2 features; all features require Dinner Relies on folders, which POP email accounts do not support	Sign-in requires Gmail or Google Workspace; Microsoft 365 and Exchange are not supported, and other providers work only through forwarding Free plan limits search history to 90 days and adds a 'Sent with Shortwave' signature Each plan has a daily AI usage quota; higher tiers give more usage	No free plan for Mail; the Superhuman suite's Free and Pro plans do not include Mail Built for Gmail and Outlook users; other email providers are not mentioned on the product page Auto Drafts, Ask AI and CRM integrations require the Business plan
Made by	SaneBox, Inc.	Shortwave Communications, Inc.	Superhuman (formerly Grammarly)

Entry prices are the cheapest paid plan, as each vendor publishes it; “What it covers” says what that price is per (a user, a channel, a brand, a number of contacts). The sources are listed on each tool's page.

Every tool in AI email and inbox tools is on its category page, with the written head-to-heads on Compare.