The AI operating system for your computer.

Talk to your Mac and it acts — drafting, clicking, and running tasks across your apps, hands-free.

Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team • Reply to Sam's email and book a meeting for tomorrow at 10am with the design team • Send Sarah a message about moving the first milestone to Friday • Summarize this thread in Slack and post it to #product • Create a Linear issue for the login bug and assign it to me • Add a page to Notion with today's meeting notes • Find a 30-minute slot tomorrow and invite the whole team •
Listening…
Three ways in

Say what you want. See what you're doing. Launch anything.

synchronous is three subsystems in one layer — voice as the primary input, a context overlay that reads your screen, and a command palette for instant access underneath.

Voice

Talk instead of type. Speak workflows, dictate into any field, or ask about what's on screen — the main way you drive synchronous.

  • Works in any text field, any app
  • Cleans up ums, fragments, and grammar
  • Same hotkey — speak or type, your call
Listening…

You said

um so like can you uh send the draft by friday maybe

Clean output

Can you send the draft by Friday?

Insert

Context Overlay

It reads the window you're focused on — never your whole screen — so it understands what you're working on and answers in place.

  • Scoped to the active window only
  • Ask questions about what's on screen
  • Proactive suggestions based on what you're viewing
GmailMail — Re: Q3 planning
Re: Q3 planning
From: Sam Chen · Yesterday

Can we push the launch to next Friday? I've attached the revised timeline with the three dependency blockers highlighted.

Reading this window
Focused

You asked

What are the three blockers?

Answer

API rate limits, design sign-off, and QA capacity — all called out in Sam's timeline attachment.

Draft a replySummarize threadAdd to calendar

Command Palette

Launch apps, recall clipboard history, and run actions — one hotkey from anywhere on your Mac. No switching, no hunting through menus.

  • Fuzzy search across apps & files
  • Clipboard history always one keystroke away
  • Context-aware actions surface before you type
slac⌥ Space
Apps
Slack↵ Open
Linear
Notion
Cursor
Clipboard History
that spike from last week…2m ago
product@company.com14m ago
Re: Q3 planning — Sam Chen1h ago
Suggested Actions
Email the team
Search similar bugs
Book a follow-up
Under the hood

How synchronous actually works

No magic — a hotkey, the macOS accessibility API, and a model call. Here's the whole pipeline.

synchronous — step 01
⌥+Space

Overlay opens from anywhere

Skip straight to the result

A whole workflow, folded into one spoken request.

Opening apps, scrolling, clicking, typing — synchronous handles the in-between steps the moment you stop talking.

Before~9 min

12manual steps

  • Open Gmail
  • Scroll to find the email
  • Click reply
  • Type a reply
  • Open Calendar, add event
  • Invite Sam, click Create
  • + 6 more steps…
After~4 min saved

1spoken step

“Reply to Sam's email and book a meeting for tomorrow.”

Working…
Done in one command
Agent Mode

Say what you want. It runs the steps for you.

Hands off the keyboard. One request fans out into the exact actions each app needs — booked, drafted, filed, done — without you switching windows.

Gmail: draft & summarize
Gmail

Drafted a reply to the product team and summarized the thread.

Completed
Cursor
Calendar
Slack
Notion
Messages
Linear
Gmail
Google Docs
Figma
Dictation Mode

Talk it out — get back finished writing.

The half-formed sentences, the ums, the wrong grammar — synchronous cleans it all up and shapes it to fit wherever you're typing.

Slack#general
general
engineering
design
Hey — can you send me that form by tomorrow? Thanks so much!
CursorCalendarSlackNotionMessagesLinearGmailGoogle DocsFigma
Adapting to your tone

Sounds like you

It learns your phrasing and tone, so what lands on the page reads like you actually wrote it.

What you get

Everything included.

Six capabilities that ship on day one — from instant recall and app bridging to dictation in any field.

Voice-first commands
Email the product team about the delay
Gmail
New message
Gmail · drafted from Slack context
Ready to sendDrafted
To: product@company.com
Cc: engineering-leads@company.com
Subject: Update on the release delay

Switched from Slack, drafted in Mail, and addressed the thread — one spoken command.

Privacy

Only the window you're working in.

Screen context and your voice are sent only for the window you're actively focused on — nothing runs in the background, and we don't store your audio.

System Settings

What synchronous can access

Processing

Where requests runSecure cloud API

Optional sharing

Straight from the beta

People are putting the keyboard down.

Agent mode, dictation, and privacy — from people testing synchronous on their Mac.

GPGabe PerezHead of Product Curation, Product Hunt
“Agent Mode is unreal. I book meetings and clear my inbox before I've even opened my laptop lid all the way.”
YOYoichi OchiaiMedia Artist
“The dictation quality is the best I've tried. It sounds like me, not a robot.”
UUsutakuIndie Builder
“Never touching my mouse is the killer feature. I say it once and it lands across Slack, Notion, and Linear.”
RGRene GrywnowFounder
“The privacy controls sold me. My audio never leaves my machine.”
GPGabe PerezHead of Product Curation, Product Hunt
“Agent Mode is unreal. I book meetings and clear my inbox before I've even opened my laptop lid all the way.”
YOYoichi OchiaiMedia Artist
“The dictation quality is the best I've tried. It sounds like me, not a robot.”
UUsutakuIndie Builder
“Never touching my mouse is the killer feature. I say it once and it lands across Slack, Notion, and Linear.”
RGRene GrywnowFounder
“The privacy controls sold me. My audio never leaves my machine.”
Pricing

Start free. Pay only if you love it.

Every plan ships with the full toolset — upgrade when you outgrow the free limits.

Free

$0/forever

no credit card required

Enough to make it part of your day.

100 uses / week
  • Dictation Mode
  • Agent Mode
  • Custom vocabulary
  • Works in every app
Most popular

Pro

$15/per month

billed annually

For people who live in their shortcuts.

Unlimited usage
  • Everything in Free
  • Unlimited usage
  • Priority support
  • Team features

Enterprise

Custom

billed annually

For teams that need control at scale.

Tailored to your needs
  • Everything in Pro
  • Zero data retention
  • SOC 2 Type II & ISO 27001
  • SSO / SAML
Sits on top of the apps you already use
  • SlackSlack
  • GmailGmail
  • NotionNotion
  • LinearLinear
  • FigmaFigma
  • CursorCursor
  • GitHubGitHub
  • VS CodeVS Code
  • Google DocsGoogle Docs
  • CalendarCalendar
  • ClaudeClaude
  • ChatGPTChatGPT
  • TelegramTelegram
  • TeamsTeams
  • OutlookOutlook
  • MessagesMessages
  • MapsMaps
  • SlackSlack
  • GmailGmail
  • NotionNotion
  • LinearLinear
  • FigmaFigma
  • CursorCursor
  • GitHubGitHub
  • VS CodeVS Code
  • Google DocsGoogle Docs
  • CalendarCalendar
  • ClaudeClaude
  • ChatGPTChatGPT
  • TelegramTelegram
  • TeamsTeams
  • OutlookOutlook
  • MessagesMessages
  • MapsMaps