Write · Make · Post · Reply · Measure
The whole job of social media, in one tool.
Write in your voice, make the picture, the video and the carousel, publish to the platforms you use, answer the comments and read the numbers, in one workspace. It learns how you write from what you have already published.
No account for the sample. Nothing is published.
A free account puts three drafts for next week on your own calendar. No card.
recorded from the real app · a site pasted, three drafts on next week's calendar
For everyone who has to keep posting - your own thing, your company's, or your clients'. support@sydium.com reaches the person who built it.
how it works
Seven jobs, one workspace. Pick the one you came for.
1 · Voice
It sounds like you, in posts and replies.
Learned from what you have already published, then used by everything below.
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Start with what you have already written
Your posts, your website, your brand documents: it learns cadence, vocabulary, point of view. Paste posts you admire and it reads their traits. Nothing written yet? Type answers to five questions about your work.
Add your own rules
Words to always use, words to avoid, who you are writing for, how you sign off.
One voice per brand, or per client
The same voice writes the post, the carousel, Muse's captions and the suggested reply to a comment. The edits you make to its drafts shape the next ones.
Three businesses. Three voices. You bring the news, it brings the voice - switch brands and watch the same fact come out sounding like each of them.
Try it on your own site. No account.
Paste your website or a few of your posts. Read the sample and decide whether it sounds like you.
Paste your website. We'll learn your voice.
Your writing DNA + 3 posts written as you. No signup needed.
No signup. No email. Just your URL.
the sounds-like-you promise
You decide whether it sounds like you. If it doesn't, the month is refunded and the voice retrained.
Your call, not ours. One email, no form and no call.
Covers your first paid month, on top of the 14-day free trial.
2 · Ideas
Three ideas a day for what to post.
Three ideas a day from what people search around your niche, one click into the composer.
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Three ideas a day
From what people search around your niche, not a trend feed. Open one and it is a brief: the angle, the hook, what to show.
Into the composer in one click
The idea lands in the writer with its brief. Generate, and the caption is in your voice. What you use, save or dismiss steers the next ideas.
Set from your site
It reads your website and proposes your niche. Change the categories, the keywords and the topics it must avoid whenever you like.
3 · Make
The picture, the video and the deck, in the same window.
The image, the video and the carousel, made and edited inside the post.
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Image Studio
Describe the image, then edit it by typing: remove the background, extend the frame, warmer light. Colours and style come from your own site and posts.
Video Studio
Trim on one timeline, cut the silences, burn in captions from the transcript, lay a track under it. Close the editor and the finished video is on the post. There is no export step.
Carousel Studio
Writes the slides, designs them in one of six styles, and attaches the result in each platform's format: a carousel on Instagram, a PDF document on LinkedIn, a 9:16 photo post on TikTok.
4 · Publish
One composer, eleven previews.
Written once, previewed and adapted per platform, scheduled the way you work.
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Written once, adapted per platform
Each platform's own preview and settings: TikTok's privacy, YouTube's visibility, a LinkedIn document, a Google Business call to action. One click adapts the wording for each; you review the changes.
Now, later, in a queue, or on repeat
Schedule to the minute, drop it into a recurring slot, or set a post to repeat. A calendar by month or week, and Instagram's grid the way it will look.
Autopilot, when you want it
It drafts the coming week per brand and you review every post, approve a batch once a week, or let it publish. Change the mode or pause it whenever you like.
5 · Reply
The comments, in one inbox, with a reply drafted in your voice.
Comments from eight platforms and DMs from two, with a reply drafted in your voice.
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Comments and messages, together
Comments from eight platforms, DMs from Instagram and Facebook, one thread per conversation. Reply to comments on seven of them from the same screen; Bluesky is read-only.
Suggested replies that sound like you
Drafted from your voice and the recent conversation. Send it, or edit it first.
A keyword sends the link
Someone comments a keyword, they get the link by DM. Notes and tags for the people you want to follow up with.
6 · Measure
See what worked.
What each platform reports, a report you can send, and competitors beside you.
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Per platform, per post
The metrics each connected platform reports, per post and over time; your top posts, sortable; one click to repurpose the best of them. X shows what its public counts allow.
A report you can send
A link with an expiry and a password, a PDF, a CSV. On Agency, a monthly report emailed to a client.
Compared with other accounts
Track up to six Instagram or YouTube accounts and compare cadence and engagement side by side. Instagram needs a business account connected through Facebook.
your other subscriptions
The tools you may already be paying for, in one place.
“To do what Sydium does, I needed three things: a scheduler, a GPT I built myself, and an assistant to run them.”
the job
where it usually lives
in Sydium
Pro is $35 a month, or $336 a year ($28 a month). Video generation is billed separately in credits; client workspaces are on Agency.
“I train AI on brands for a living, so I am hard to impress: Sydium runs all my brands, and each one still sounds like itself.”
“I open it, adjust a few lines, and it goes out. That's the difference between posting when I have time and posting every week.”
Simple plans.
full breakdown →save ~20%
Pro: $28/mo, billed yearly · $35 monthly
Agency: $79/mo, billed yearly · $99 monthly
Enterprise: $499/mo, billed yearly · custom terms
Pro
$28/mobilled yearly · $35 monthly
One brand, every tool on this page: the composer for eleven platforms, the studios, the inbox, the numbers. Three trained voices, 2 seats, and autopilot on 5 accounts when you want it.
Start with $0 todayAgency
$79/mobilled yearly · $99 monthly
Everything in Pro, plus 20 client workspaces, each with its own voice, portal and approvals. 10 seats, scheduled client reports, autopilot on 20 accounts.
Running clients? See Sydium for agenciesStart with $0 todayEnterprise
$499/mobilled yearly · custom terms
50 client workspaces, 50 seats, unlimited automations, autopilot on 50 accounts, and a priority line to the founder.
Talk to DanAn account and your first drafts need no card. The 14-day trial on Pro and Agency needs one: $0 today, cancel before day 14 and pay nothing. First month doesn't sound like you? Voice retrained free, month refunded.
7 · Clients
Running it for other people.
A workspace, a voice and a portal per client, and approvals through a link.
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A workspace per client
Its own connected accounts, its own trained voice, and its own daily ideas if you switch them on. Twenty workspaces on Agency.
They approve through a link
A client, a founder or legal: approve, reject or ask for a change from an email link, without a Sydium account. Two levels if your team checks first. Every decision on the record.
A portal in your branding
Their approvals, their reports and their engagement, under your logo and colours. The report itself carries the client's name and ours.
Use it from ChatGPT or Claude.
Connect either one, or any client that speaks MCP, and post, schedule, draft a carousel or read your analytics from there. Developers get a REST API and a CLI.
The Chrome extension saves any page or selected text into your ideas. Get it for Chrome ↗
Listed in the ChatGPT plugin directory and the Claude connectors directory.
Read the developer docs →I built Sydium because I was the founder who never posted. Running the business always beat posting about it, so I built the teammate that never forgets. Now the queue is never empty and it still sounds like me.Dan Pralea · built solo in Brasov, Romania · support@sydium.com
“Found a missing feature. He shipped it the next day. I am no longer just a user, I am a supporter.”
See three drafts on next week's calendar. No card.
Create an accountFirst month doesn't sound like you? Voice retrained free, month refunded.