Our Lips Are Sealed.™
Speak naturally. Get polished text instantly.
No cloud, no subscription, no compromise.
In: Audio_BufferOut: < 12ms
"Make that bold."
OFFLINE_MODE_ACTIVE
Feels Like Thought.
Traditional dictation round-trips to the cloud. We don't. Sealed Flow runs on your GPU. Text appears so fast it feels less like software and more like thinking out loud.
Intelligence that listens.
When you speak naturally, you pause, restart, and use filler words. Whisker, our proprietary model, understands this. It parses semantic structure to clean up your speech in milliseconds.
Air-gapped by design.
What you say stays on your machine. Literally. Pull the ethernet cable. Sealed Flow works exactly the same. No data ever leaves the Seal. Perfect for medical, legal, and private journaling.
The Engine
Meet Whisker.
Sealed Flow's proprietary AI model, purpose-built for transforming raw speech into polished text locally.
Raw Audio Input
"um i think we should like probably restart the server... uh specifically the database node because it's hanging you know?"
Whisker Output
"I think we should restart the server, specifically the database node, because it's hanging."
Auto-Punctuation
Turning streams of speech into properly formatted sentences with correct capitalization.
Filler Removal
"Um," "uh," and "like" disappear automatically. Only your intended words remain.
Zero Hallucination
Whisker is deterministic. It never adds words you didn't say or fabricates facts.
Specialized Training
Trained exclusively on dictation, not internet chat. No general knowledge bloat.
< 150msProcessing Time
< 1GBOn-Disk Size
100%On-Device (Apple Silicon)
$0Subscription Cost
Privacy isn't a policy. It's architecture.
Whisker runs exclusively on your local hardware. There is no API call, no cloud queue, and no data retention policy to read. Your dictation never leaves your computer.
Optimized for Apple Silicon (M1/M2/M3/M4)
Zero datacenter footprint
Good for the planet, too.
Cloud AI burns energy around the clock in datacenters worldwide. Sealed Flow runs on your existing hardware—no servers, no cooling systems, no carbon footprint beyond your Mac.
We donate 10% of profits to climate and conservation causes. We publish our donations transparently throughout the year.
Works everywhere you do.
Native integration with your existing workflow.
Slack
Notion
Email
Terminal
What people are saying.
"Finally, dictation that doesn't make me nervous about data privacy. As someone who works with sensitive information daily, knowing everything stays on my machine is non-negotiable. Sealed Flow just gets it."
AR
Ashlee Rigel
SVP Data Strategy, HCEsquared
"I write dozens of emails and Slack messages every day. Sealed Flow has genuinely changed how I work—I just talk and it outputs exactly what I meant to say, minus all my verbal tics. It's like having an editor in real-time."
JF
Jevan Fox
CEO, USOKIE
"The speed is unreal—I was skeptical that on-device could match cloud performance, but Whisker is faster than anything I've used. And as a CTO, I appreciate that there's no API call to audit. It's just... local."
AD
Adam Darrah
CTO, Opendate
Frequently Asked Questions
What is Sealed Flow?
Sealed Flow is a dictation app for Mac that turns your speech into polished text—instantly and privately. Unlike cloud-based tools, everything runs directly on your computer. No internet required, no data leaves your device.
What is AI dictation?
AI dictation uses artificial intelligence to convert your spoken words into written text. But it goes beyond simple transcription—it understands context, removes filler words like "um" and "uh," adds proper punctuation, and delivers clean, readable text.
What is the Whisker engine?
Whisker is our custom AI model built specifically for dictation. Think of it as a smart assistant that lives entirely on your Mac. When you speak, Whisker listens, cleans up your speech (removing the "ums" and awkward pauses), and outputs polished text—all in milliseconds, all without ever connecting to the internet.
Is it safe?
Yes. Sealed Flow runs 100% on your local machine. There are no servers, no cloud connections, and no way for anyone—including us—to access your dictation. Your words never leave your computer.
Is it private?
Completely. Privacy isn't just a policy for us—it's architecture. Sealed Flow is air-gapped by design. Pull the ethernet cable, turn off Wi-Fi, and it works exactly the same. Perfect for medical notes, legal dictation, journaling, or anything you'd rather keep to yourself.
How much does it cost?
Sealed Flow is free to download and try—no credit card required. When you're ready to go unlimited, it's a one-time purchase of $29—no subscriptions, no recurring fees. As an early supporter, you'll receive a Forever License: buy once, own it forever, with updates and support included.
How is Sealed Flow different from other dictation tools I've heard Wisprs of?
Most dictation tools send your voice to the cloud, charge monthly subscriptions, and require an internet connection. Sealed Flow does none of that. It's faster (runs on your GPU), more private (completely offline), and more affordable (one-time purchase). Plus, our Whisker engine is purpose-built for dictation—not a general AI trying to do everything.
Who makes Sealed Flow?
Sealed Flow is built by Gumbo Labs. While the company is new, the team behind it isn't—we're experienced developers passionate about privacy and great software. This is a fully supported product. Expect regular updates, responsive support, and a team that actually listens to feedback.
How do I get started?
Download Sealed Flow for free and try it out. No account required, no credit card needed. Join the first wave of users and experience dictation that actually respects your privacy.