use cases

Built for people who ship.

Siren makes launch videos, ad creatives and captions in your brand from one prompt, and posts them to X, LinkedIn and YouTube (TikTok with your OK on each post). One video is $9.99; plans are Spark $19, Pro $49 and Scale $149 a month, and Siren works inside Claude, Cursor and ChatGPT over MCP. Updated 3 Oct 2026.

You build the product and you still do the posting. Here is what that looks like with a marketing department that lives in a prompt.

you just shipped

Your commit becomes the launch post.

You merged the thing. Siren turns it into a launch video, an ad creative and a caption that sound like you, not a press release.

Paste the commit, the changelog or one line
A video and an ad creative, cut for each channel
Written in your voice, no hype words

git log --oneline

a41f2c9 feat: onboarding in three clicks, not twelve
9be07d1 fix: dark mode on the billing page
3c55e10 chore: bump deps

Your product@yourproduct · now

Onboarding used to take twelve clicks. Now it takes three. Try it on your own account today.

you live in an agent

Type post this. That is the whole job.

Connect Siren to Claude, ChatGPT, Cursor or Grok. Your agent reads what changed, makes the post, shows you, and posts when you say yes.

MCP on every plan
It always shows you first
Scheduled drops when the render lands

claude.ai/code

post this

✓ read today’s changes

✓ render_asset · still, 4:5

Here is the post and the image. The sharpest change today is the new export button. Post it?

yes, X and LinkedIn

✓ post_run · X, LinkedIn · posted

you want a rhythm

A week of posts, done on Monday.

Ask for the week. Siren plans it, makes Monday's first so you can check the tone, then queues the rest across your channels.

One ask plans the whole week
Mixed videos and ad creatives
Change any day before it goes out

This week · planned Monday, 9:12

Mon

Tue

Wed

Thu

Fri

Satrest

Sun

you run more than one thing

Every product gets its own brand.

The app, the side project, the new launch. Each one gets its own workspace, look and voice, and they never borrow from each other.

Up to 3 brands on Pro, 10 on Scale
Separate Brand DNA and memory
Switch in one click

Workspaces

Northboundthe app

Ledgerlythe side project

Ternthe new launch

Each brand keeps its own look, voice and memory. Nothing leaks across.

Pick the job

Each page shows the Siren videos made for it, with a prompt to start from.

launchA launch video for your SaaS, made from your site.launch dayA Product Hunt launch video that stops the scroll.extensionA demo video for your Chrome extension.mobile appA promo video for your mobile app.new featureA video for the feature you just shipped.updatesYour changelog, as a video every week.ai productA demo video for your AI product.ai agentsA launch video for your AI agent.dev toolsA launch video for your developer tool.explainerAn explainer video for your SaaS.pre-launchA coming-soon teaser for your waitlist.pricingA video for a new plan or a price change.milestonesA video for your milestone.

a thousand voices, one signature

What did you ship this week?

Type it in one line. Siren makes the post, and you decide when it goes out.

Get started See pricing