What Spark is — and where it stops
Spark is a polished email client with a Smart Inbox and broad provider support. It's a solid free-to-cheap option — but the useful AI is gated to premium, and it's a client you adopt rather than an AI that runs your existing inbox for you.
Where teams outgrow Spark:
- Another client to adopt across your devices.
- AI drafting and advanced features are gated to premium tiers.
- No fraud/phishing quarantine.
- Smart Inbox groups mail; it doesn't continuously file the noise out the way AI triage does.
Why Inbox Hero is the Spark alternative people switch to
Inbox Hero isn't just a filter or a cleanup tool — it's an AI that runs your inbox end to end:
- AI auto-filing (Later): bulk mail, newsletters, receipts and notifications move out of your inbox into an Inbox Hero/Later folder automatically — the SaneBox idea, done with AI. Every move is one-tap undoable and it learns from your corrections.
- Ask your inbox: "What am I waiting on?", "Did the contract land?" — ask in plain English and the AI reads your mail and answers.
- Quick Reply: Inbox Hero drafts replies in your voice; glance, tweak, and send with a swipe.
- Fraud & phishing protection: an optional scanner reads incoming links and messages and quarantines phishing, scams and malware into a dedicated Fraud folder — a security layer none of the folder-only tools offer.
- Custom folders: route any sender or keyword into a folder you choose; your rules always win.
- Works everywhere: Gmail via Google, plus iCloud, Yahoo, Fastmail and other IMAP mailboxes with an app password (Outlook.com is not supported yet).
Inbox Hero vs Spark, side by side
| Inbox Hero | Spark | |
|---|---|---|
| Continuous AI auto-filing | ✓ | Grouping |
| Drafts replies in your voice | ✓ | Premium |
| Ask your inbox in plain English | ✓ | Partial |
| Fraud & phishing quarantine | ✓ | ✗ |
| Works inside existing Gmail | ✓ | New client |
| Learns from your corrections | ✓ | ✗ |
Frequently asked questions
What is the best alternative to Spark?
Inbox Hero is a leading Spark alternative: it auto-files bulk mail into a Later folder, drafts replies in your voice, answers questions about your inbox, and quarantines phishing and malware. It is free for 30 days ($0 today), then $10/month ($5 per extra mailbox).
Is Inbox Hero cheaper than Spark?
Inbox Hero is one flat $10/mo (or $99/yr) after a 30-day free trial with every feature included. Spark is priced at $5–$8/mo. Inbox Hero also includes fraud/phishing protection that Spark does not offer.
Can I switch from Spark without losing my email?
Yes. Inbox Hero connects to your existing Gmail or IMAP mailbox and organizes it in place — your email never leaves your provider, and you can disconnect anytime.
Does Inbox Hero do anything Spark can't?
Yes — most notably a dedicated Fraud folder that scans incoming links and messages and quarantines phishing, scams, and malware, plus an AI you can ask questions and that drafts replies in your voice.
Take back your inbox today
Connect Gmail or any mailbox in one click. Inbox Hero files the noise, drafts your replies, and quarantines phishing. It is free for 30 days ($0 today).
Get started free