The main SaneBox alternatives are Shortwave (AI filters and bundles for Gmail), Superhuman Mail (Auto Labels and Auto Archive for Gmail and Outlook), Fyxer (AI categories inside Gmail or Outlook), Spark Mail (a free Smart Inbox), and Copilot in Outlook (Prioritize my inbox for Microsoft 365). Synced, in private beta, takes a different approach: instead of sorting mail, it drafts replies for approval.
What to check before replacing SaneBox
- Your provider. SaneBox works with Gmail, Microsoft 365, iCloud, Yahoo, Fastmail, IMAP, and Exchange. Most alternatives below cover only Gmail, or Gmail and Outlook.
- Your email app. SaneBox sorts on the server, so any app sees the result. Shortwave, Superhuman, and Spark sort inside their own apps.
- What gets read. SaneBox says it analyzes headers and never stores full emails. AI tools that summarize or draft read message content, so check each one's data policy.
For reference, SaneBox's pricing page listed Snack at $9.49 a month or $65 a year on September 13, 2026, after a 7-day free trial.
| Tool | How it sorts email | Providers | Price from (official page) |
|---|---|---|---|
| Shortwave | AI filters you write in plain English, bundles, splits | Gmail and Google Workspace | Free plan; paid from $30/seat/month |
| Superhuman Mail | Auto Labels, Auto Archive, Split Inbox | Gmail and Outlook | $25/member/month billed annually |
| Fyxer | AI categories like To Respond, FYI, Marketing | Gmail and Outlook | $22.50/user/month billed annually |
| Spark Mail | Smart Inbox with newsletter and notification sections, Gatekeeper | Gmail, Outlook, Exchange, iCloud, Yahoo, IMAP | Free |
| Copilot in Outlook | Prioritize my inbox | Microsoft 365 and Outlook.com accounts | Copilot Business $21/user/month paid yearly, plus a Microsoft 365 plan |
| Synced | Doesn't sort; drafts replies for approval | Gmail and Outlook, plus Slack, Teams chats, WhatsApp Business | Free plan; Pro $24.99/user/month billed annually |
Checked September 13, 2026, in USD.
Shortwave: AI filters written in plain English
Shortwave's AI filters take a prompt and then label, archive, star, or delete matching mail, and bundles group newsletters and notifications together. It has a free plan; paid plans on its Business tab start at $30 per seat per month, with 3 to 50 AI filters depending on tier. It needs a Gmail or Google Workspace account. Best for Gmail users who want SaneBox-style sorting plus an AI assistant, in a new email app.
Superhuman Mail: Auto Labels and Auto Archive
Superhuman's AI separates marketing, cold pitches, and social updates with Auto Labels and can archive them automatically. You can write custom labels from short prompts and split your inbox into tabs by label. Starter is $25 per member per month billed annually. Best for people who want sorting and a fast email client for Gmail or Outlook, and don't mind switching apps.
Fyxer: categories inside the inbox you already use
Fyxer sorts incoming mail into categories like To Respond, FYI, and Marketing directly in Gmail or Outlook, and you choose which categories stay in the inbox. It also drafts replies in your voice and never sends them for you. Plans start at $22.50 per user per month billed annually after a 7-day trial. Best for SaneBox users who want to keep their current app and add AI drafts. See Synced vs Fyxer.
Spark Mail: a free Smart Inbox
Spark's Free plan includes Smart Inbox, which separates newsletters and notifications from personal mail. Spark also has Gatekeeper for screening and blocking unwanted senders. It supports the widest provider list here after SaneBox, including iCloud, Yahoo, and IMAP. Best for anyone whose main goal is a cheaper way to get a quieter inbox, and who is willing to use Spark as their email app.
Copilot in Outlook: Prioritize my inbox
Microsoft's Copilot in Outlook FAQ describes a Prioritize my inbox feature alongside summaries and Draft with Copilot. It's part of Microsoft 365 Copilot, which requires a qualifying Microsoft 365 plan; Copilot Business was listed at $21 per user per month paid yearly. Best for Microsoft 365 organizations that would rather use what their license already covers.
Synced: when the problem is replying, not sorting
Synced isn't a filter. It reads new messages from Gmail, Outlook, Slack, Microsoft Teams chats, WhatsApp Business, and other connected Inboxes, writes an Action Plan for each, and holds drafts for your approval. If SaneBox already got the important mail to the top and the remaining pain is answering it, Synced is a complement more than a replacement. It's in private beta with a Free plan of 20 Action Plans a week. See Synced vs SaneBox.
- SaneBox pricing (checked 2026-09-13)
- SaneBox homepage and FAQ (checked 2026-09-13)
- SaneBox security and data policy (checked 2026-09-13)
- Shortwave pricing (checked 2026-09-13)
- Superhuman Mail pricing (checked 2026-09-13)
- Superhuman Mail AI features (checked 2026-09-13)
- Fyxer pricing and FAQ (checked 2026-09-13)
- Spark pricing (checked 2026-09-13)
- Spark homepage (Smart Inbox, Gatekeeper, providers) (checked 2026-09-13)
- Microsoft Support: Frequently asked questions about Copilot in Outlook (checked 2026-09-13)
- Microsoft 365 Copilot plans and pricing (checked 2026-09-13)