Both tools promise AI writing in "your voice." But there's a big difference between picking a tone from a dropdown and training AI on your actual writing. Here's how they compare.
Same prompt. Different output.
Prompt: "Follow up with a lead who went quiet after the demo"
I hope this email finds you well. I wanted to reach out and follow up on our recent demonstration. I understand you may have a busy schedule, but I would love the opportunity to reconnect and address any questions or concerns you might have. Please don't hesitate to reach out at your earliest convenience.
Prompt: "Follow up with a lead who went quiet after the demo"
Hey Sarah - wanted to check in after the demo last week. I know things get busy, but if you're still thinking about it, happy to hop on a quick call to talk through any questions. Either way, no pressure - just let me know.
Quick Comparison
| Feature | ToneClone | JetWriter |
|---|---|---|
| Voice training | Upload your writing samples | Profile description + style presets |
| Learns from edits | Yes (SmartStyle) | No |
| Block AI-sounding phrases | Yes (StyleGuard) | No |
| Context/knowledge storage | Knowledge Cards | No |
| Browser extension | Chrome, Firefox | Chrome, Edge, Brave, Opera |
| CLI for developers | Yes | No |
| Mobile | Android app and Web | Web app only |
| Gmail integration | Yes | Yes |
| Free tier | Yes | Yes (limited) |
Where JetWriter Wins
Look, JetWriter is solid. Here's what it does well.
More browser support. JetWriter works on Chrome, Edge, Brave, and Opera. Safari's coming soon. ToneClone is Chrome and Firefox for now.
Chat with page / chat with docs. JetWriter lets you ask questions about what's on screen or upload documents to chat with. That's useful if you're doing research or digging through long PDFs.
Lighter extension footprint. JetWriter's extension is smaller and faster. If you hate bloated browser extensions, that matters.
Deeper support tool integrations. JetWriter plugs into Zendesk, Freshdesk, and Zoho. If you're a support team using those platforms, JetWriter's built for you.
Good for: People who want a general AI assistant that lives in their browser. You don't need deep personalization - you just want quick AI help across lots of tasks.
Where ToneClone Wins
This is where ToneClone goes deeper.
Actual voice training. You upload real writing samples - emails, blog posts, documents. Not a 2-sentence description. ToneClone analyzes your vocabulary, sentence patterns, and quirks. JetWriter asks you to pick a tone from a dropdown. There's no comparison.
SmartStyle. ToneClone watches how you edit its drafts and improves over time. You accept a suggestion, reject another, change a word - ToneClone learns. JetWriter doesn't do this. Your persona gets better the more you use it.
StyleGuard. Block phrases like "I hope this email finds you well" or "leverage" or "explore" - the stuff that screams AI. StyleGuard removes them automatically. JetWriter has no AI-tell detection.
Knowledge Cards. Store context - your bio, product info, company details, work history. ToneClone remembers it across sessions. No more re-explaining context every session.
Developer-friendly. CLI tool for power users who work in terminal. Full API access. n8n integration for automation. JetWriter is browser-first.
Mobile Android app with draft generation, keyboard integration to write in any app, and easy access to share back and forth with other apps on your phone. Easy to keep writing, even on the go.
Good for: People who write a lot and want AI output that genuinely sounds like them, not "professional-casual AI voice #3." If you write anywhere besides just the browser, or just want something that doesn't sound like generic AI, ToneClone is your go to.
The Real Difference
Here's the thing: JetWriter is an AI assistant with personalization features. ToneClone is an AI writing tool that learns your voice and writing style.
JetWriter says, "Pick your tone from these options." ToneClone says, "Show me how you actually write, and we'll train AI to sound like you."
If you want quick AI help across lots of tasks - chat with a page, summarize a doc, brainstorm ideas - JetWriter is solid. If you're tired of editing every AI draft to not sound robotic, ToneClone goes deeper.
The difference shows up in the output. JetWriter's drafts sound like "professional AI." ToneClone's drafts sound like you.
Give It a Shot
Start free - no credit card, no commitment. Upload a few emails and see if ToneClone can match your voice.