Write once,
cast everywhere.
Send one message. Zyncast writes the version each platform wants, schedules it, publishes it, and tells you how it did — all in the chat thread you already keep open.
Free during the beta · No card required · Leave whenever you like
One WhatsApp message
The whole point
Your publishing tool is already on your phone.
Every other tool asks you to log in somewhere new. Zyncast lives where you already spend your day — WhatsApp. Message it like a colleague and it does the rest.
No dashboard to open
Everything happens in a chat thread. Post from a queue, from bed, from the back of a taxi — anywhere you'd send a message.
Faster than a browser tab
Send a photo and a sentence. Zyncast handles cropping, aspect ratios, captions and the five different upload rules behind them.
It confirms before it posts
You always see the summary and say yes. Nothing reaches an audience until you approve it.
Zyncast
online
Friday, 9:00 AM
- Instagramready
- Facebookready
- TikTokready
- LinkedInready
- Xready
Send it?
What you get
Less a toolbox.
More a day that goes differently.
Publish everywhere
Stop posting the same thing five times.
Write it once. Zyncast reshapes it for every connected account — crops the image to each aspect ratio, trims the caption to each limit, and publishes them together.
- One post → every platform
- Per-platform formatting
- Partial failures retried
Autumn drop
Fri, 9:00 AM
- InstagramPublished
- FacebookPublished
- TikTokPublished
- LinkedInPublished
- XPublished
Five posts, five formats, one message from you.
AI assistant
Never open a blank caption box again.
Describe the idea in a sentence — or send a voice note. You get a caption that sounds like you, in the register each platform rewards, in any language your audience speaks.
- Generate captions
- Rewrite in your voice
- Translate
- Hashtags that fit
- Generate images
Your note
New collection drops Friday 9am.
Three years ago we shipped this in a spare bedroom. Today it goes on sale.
Calendar
See the whole month before it happens.
Everything scheduled, in one grid. Drag a post to a better day, set the weekly ones to repeat, and route anything sensitive past a teammate before it goes out.
- Drag-and-drop scheduling
- Recurring posts
- Approval workflow
October
6 scheduled
Drag to reschedule — every connected platform follows.
Analytics
Find out what actually worked.
Not a wall of numbers — the two or three that change what you post next. Zyncast reads the pattern and tells you, in chat, when your audience is actually awake.
- Reach
- Engagement
- Follower growth
- Best time to post
Reach this week
128,400
Best time to post: Saturday, 9:00 AM
Automations
Say the rule. It keeps the rule.
Describe a habit in plain English once. Zyncast runs it in the background from then on — no trigger builder, no if-this-then-that grid to learn.
“Whenever I publish on LinkedIn, turn it into an X thread.”
Every Monday, 8am
draft the week from my notes and send them here for review.
When a Reel passes 10k views
cut it for TikTok and Facebook and schedule both.
When I send a voice note
turn it into a caption and generate the image to go with it.
Before anything goes live
send it to Ada to approve first.
How it works
Three steps, and only one of them happens twice.
You set it up once. After that it's just messaging.
- 01
Connect your accounts
Once, from the web. You sign in through each platform's own login screen and choose exactly what to grant. We never see or store your passwords, and you can disconnect any account in a click.
- 02
Message Zyncast on WhatsApp
Send the idea, the photo or video, and roughly when you want it out. Rough is fine — “tomorrow morning” is enough. Ask for a different caption, a translation, or a fresh image right in the thread.
- 03
Say yes, and it casts
You get a summary of what will be posted where. Approve it and Zyncast schedules everything, publishes at the right moment, and messages you back when each one is live.
FAQ
The things people ask first
Do I have to install anything?
No. If you have WhatsApp, you have Zyncast. You save our number, send a message, and you're publishing. There's also a web dashboard for the calendar and analytics, but nothing in the core loop needs it.
How do you get access to my social accounts?
Through each platform’s official login. You’re sent to Instagram, Facebook, TikTok, LinkedIn or X to sign in and approve a specific list of permissions — we never ask for, see, or store your password. You can revoke Zyncast’s access from the platform, or disconnect from your dashboard, at any time.
Will it post something I haven't seen?
Never on its own. Every post is summarised back to you for a yes before it's scheduled. Automations you set up run in the background, and you can put an approval step in front of any of them.
What if one platform fails?
The others still go out. Zyncast retries the one that failed, and tells you in chat exactly which account had a problem and why — an expired connection, a file the platform rejected, a rate limit.
Can I get my data deleted?
Yes, and it’s a one-liner. Message DELETE to Zyncast on WhatsApp, or follow the steps on our data deletion page. Everything is erased within 30 days, and connected accounts are revoked immediately.
What does it cost?
Zyncast is free for everyone in the beta, with no card required. When we introduce paid plans, beta users get told well in advance and keep a founding rate.
Zyncast — write once, cast everywhere.
We’re letting people in a group at a time so we can set up every account properly. Add your name and we’ll message you when yours is ready.