Everything it takes to never go quiet.

Sydium learns your voice, writes and makes the content, publishes it to ten platforms, replies to the people who show up, and shows you what worked. Here is all of it, grouped by what it does for you.

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The Sydium composer: one caption written once, then Instagram, LinkedIn, X and Facebook added to the same post, each with its own live preview.

Recorded: one caption, four platforms, each with its own live preview

Create

Write and make it, in your actual voice.

Brand Voice AI

Learns how you write from your posts, your website, or uploaded documents, down to a bank of your real products, places, and numbers, so captions stay specific and never make things up. Every caption then gets a second editor pass that strips the cliches and the 'not X, but Y' tells, and it learns from every edit you make.

How brand voice works

›The editor pass, on a real draft

The editor cut one sentence, the 'not because X, because Y' inversion, and left everything else alone.

Slack notification while I was three functions deep into a bug in the queue worker. Answered it in maybe forty seconds. Came back, stared at the file, and had no idea why I'd opened it. Scrolled up. Read my own code like a stranger wrote it. Ten minutes to rebuild the mental picture of what was calling what. The message was someone asking if I'd seen their earlier message. I keep the phone in the other room now. ~~Not because I'm disciplined. Because I lost~~Lost that bug for the rest of the afternoon and never found it again. #buildinpublic #solofounder #devlife #Sydium

Struck through: cut by the editor. Lime: what it stitched in.

Generated by the production pipeline in a real brand voice, then rewritten by the same editor pass that runs on every caption. Neither side was written by hand, and the pair is shown in English in every language for that reason.

Daily ideas and voice notes

Muse hands you three content ideas every morning, grounded in what your audience actually searches. Or talk an idea out and Sydium transcribes it into a ready-to-edit draft.

Image Studio

Generate on-brand images from your palette, then edit them by chatting: swap a background, warm the light, remove an object. Each message builds on the last.

Video Studio

Generate a clip, edit it by instruction, then trim, remove silences, burn in captions, and add a soundtrack, all on one timeline.

Carousel Studio

Describe a topic and get the whole deck: an outline written in your voice, slides designed from your palette. It posts as an Instagram carousel, a TikTok photo set, and a native LinkedIn PDF.

Publish

Post everywhere, at the right time, hands-free.

The Sydium calendar: an empty week fills with a week of posts, drafted and scheduled by Autopilot without anyone touching it.

Ten platforms, one composer

Instagram, TikTok, YouTube, LinkedIn, X, Facebook, Pinterest, Bluesky, Threads, and Mastodon. Written once and tailored to each network's formats, with a live preview of every one.

See the scheduler

Calendar and queue

A visual calendar, an Instagram grid preview, best-time slots, recurring posts, and bulk reschedule.

AI Autopilot

Set a goal and it drafts, schedules, and publishes on its own, and pauses itself when engagement drops. Run it full-auto, batch-review a week at a time, or approve every post.

How Autopilot works

Repurpose and split

Turn one post into a version for every platform, or turn a whole blog article into 3 to 15 ready posts.

Engage

Reply fast, and turn comments into leads.

The Sydium inbox: Instagram and Facebook comments and DMs in one list, a conversation open beside it, and a reply being written and sent.

Unified inbox

Comments and DMs from eight networks in one feed, with one-click reply drafts written in your voice.

Comment-to-DM automations

Auto-DM anyone who comments a keyword on Instagram or Facebook, and reply in public too.

Leads

Every commenter becomes a scored lead with detected intent: a question, a buying signal, a complaint. The warm ones surface on their own.

Giveaways

Draw a winner from your post's comments, with a public audit trail anyone can check.

If your first month doesn't sound like you, we retrain your voice free and refund the month.

Start your 14-day trial

Card upfront, $0 today. Cancel before day 14 and pay nothing.

Measure

See what worked, then do more of it.

Analytics

Performance across every connected platform, an engagement score, follower trends, and best-time-to-post insight.

Competitor tracking

Benchmark any public Instagram or YouTube account by handle, side by side with yours.

Reports and shares

CSV and PDF exports, scheduled email reports, and password-protected public share links.

Scale

Run it for clients, or from your own code.

REST API

$ curl -H "Authorization: Bearer sk_live_..." https://api.sydium.com/v1/accounts

CLI

$ npx @sydium/cli accounts:list

MCP

https://sydium.com/mcp

Client workspaces and portal

A separate workspace per client, plus a client portal in your logo and colors where they approve posts, view engagement, and read reports.

Approvals and roles

Approval workflows with no-login review links, role-based permissions, and per-project sign-off.

Public API, CLI, and MCP

A REST API, a command-line tool, and an MCP server with OAuth 2.1. Drive publishing, scheduling, and analytics from Claude or your own code.

Read the developer docs

Your calendar shouldn't depend on your mood.

Start your 14-day trial See pricing

Card upfront, $0 today. Cancel before day 14 and pay nothing.

If your first month doesn't sound like you, we retrain your voice free and refund the month.

No form, no call. Email us and it's done. You are the judge.