A faster way to be in your inbox.
Fizzle Client is an AI email client for founders, operators, and small teams. Voice notes, inline video, send tracking, and an assistant that drafts the way you actually write.
From people who shipped at Linear, Notion, and Front.
End-to-end encrypted · macOS, Windows, iOS, web · works with Gmail and IMAP.
Inbox
12 unreadRe: Q3 update — voice note inside
Hey Elena — quick thoughts on the deck before tomorrow. Easier to record than type. Plus the walkthrough Sasha sent. Both should give you everything you need.
Sasha's walkthrough is below — plays inline, no download needed.
Thanks Marcus — listened on the walk. Agree on slides 4–6, going to push back on the timeline in slide 9. Let's hop on a call Friday morning if you have 20 minutes.
02 / 05 Voice notes
An email client with voice notes, built in.
Record up to five minutes inside any thread. Recipients listen in the message — no attachments to download, no separate app to open, no Loom link to chase across tabs.
- Background noise removal, on by default — your home office sounds like a studio.
- Auto-transcript generated locally — searchable in inbox, captioned for the recipient.
- Plays inline on Gmail, Apple Mail, Outlook, and any other client — not just other Fizzle users.
"Quick thought on the pricing page — I'd push the comparison table above the FAQ. The folks I've been talking to all skip the FAQ and bounce on the pricing question. Going to send mocks tonight."
03 / 05 Privacy & tracking
A private email client. With tracking that respects both ends.
End-to-end encrypted between Fizzle inboxes. Send tracking that's visible to the recipient too. The point is information, not surveillance — so both sides see what was opened, when, and by whom.
- E2E encrypted threads between Fizzle inboxes — XChaCha20-Poly1305, X25519 key exchange.
- Block incoming trackers in one click — no more invisible pixels, no more link wrappers.
- Tracking always visible — the recipient sees the same data you do. Both can turn it off.
This conversation is encrypted end-to-end. Marcus is also on Fizzle, so neither inbox can be scanned by any intermediary.
04 / 05 Inline video
An email client with built-in video playback.
MP4, MOV, Loom, Vimeo, and YouTube links all play inside the thread. Watch the walkthrough where you read the message. No tab-switching. No "I'll get to this later" pile of unwatched videos.
- Inline previews for MP4, MOV, WebM, and HLS streams.
- Loom, Vimeo, YouTube, and Mux share links auto-expand to the player.
- Picture-in-picture support — watch while you draft a reply.
"Walkthrough is attached — show your team the new flow. Slide 6 still needs work; everything else is solid."
05 / 05 AI email assistant
An AI email assistant that has read the thread.
Drafts use the full conversation, your past replies to that person, and the way you actually phrase things. Quiet until you ask. No "rewrite this in a friendly tone" toolbar tricks.
- Trained on your sent folder — picks up the way you actually phrase things.
- Per-recipient style memory — you write to investors differently than to your team.
- On-device for sensitive mail — legal, HR, fundraising never leaves your laptop.
Priya — yes, ship it whenever you're ready. I trust your judgment on the timing. One ask: send me the final copy before it goes out so I can flag anyone who should hear about it first. Don't wait on me beyond that.
House principle
Fast software for the slow part of work.Written above every desk in the office. Brooklyn, NY.
↳ Use cases
What people use Fizzle for.
Every team picks Fizzle for a different reason. Each of these pages walks through what one of them looks like in practice.
The email client with voice notes built in.
For founders and creators who think faster than they type, and for replies that are easier to record than write.
Read fizzleclient.com/private-email-client-with-trackingA private email client. With tracking, both sides see.
For consultants, lawyers, and operators who need to know whether a message was read — without using a surveillance pixel to find out.
Read fizzleclient.com/email-client-with-built-in-video-playbackAn email client with built-in video playback.
For teams that send walkthroughs, demos, and Loom-style updates instead of meetings — and for the people who'd rather watch than read.
Read fizzleclient.com/ai-email-composing-assistantAn AI email composing assistant that respects your voice.
For people whose inbox has gotten too big to type their way through — and who don't want their AI assistant to make them sound like LinkedIn.
Read→ Early access
Stop typing your way through your inbox.
We're letting people in a few hundred at a time, in the order they signed up. Founders, small teams, and operators first — the rest of the waitlist comes after.