Trained on your company. Sharpened by every deployed shipping.
Your marketing co-pilot in Slack. DM the bot about a milestone, a customer win, or a hot take — and get back a branded package in your voice: tweets, LinkedIn posts, carousels, branded images. It even suggests your weekly content calendar — you just approve. One click to publish.
Connect your deploy provider and it works the same way on every notable ship.
Lives in Slack. Speaks in your voice. Never sees your code.
You focus on shipping. Mainstager handles the marketing.
You focus on shipping. Mainstager handles your marketing.
We're shipping the MVP — a Slack agent that turns deploys into 1–3 drafts you approve before publishing. Everything below is what we're building next. Sign up free to test the MVP and shape the roadmap.
Turn a deployment into 1–3 high-quality marketing outputs, with human approval, in Slack.
Where the product is heading — sketched out in the sections below so you can shape it with us.
Solo founders and small teams shipping on Vercel, Netlify, or Railway — who'd rather build the product than spend their nights writing tweets, LinkedIn posts, and designing marketing content in Figma.
Ship something. The agent pings. You reply briefly. Receive marketing drafts back. In your voice, waiting your approval. That's the loop.
We read your deploy, then ask you one question. Your one-line answer becomes the brief — the angle, the story, the proof.
Mainstager schedules your launch package across the week — you approve once, or set it to auto-publish. Edit any post, reorder days, swap channels in one tap.
Every shippable deploy turns into a stack of drafts across every channel — written in your tone, dressed in your brand. Pick what to ship, edit anything, approve in one tap.
Our iOS app is live. We built it in 3 weeks. No native dev experience — just React Native and a lot of late nights. 10,134 downloads in 24 hours. Currently #3 in Productivity. Here's how we shipped it 🧵 (1/7)
Shipped our iOS app today — built in 3 weeks.
No native experience, no big team. Just React Native, two engineers, and a deadline I shouldn't have made. 10,134 downloads in the first 24 hours. Currently #3 in Productivity.
Three lessons from a 3-week native sprint:
1. React Native is good enough for 90% of cases
2. App Store review is faster than the internet says …
…see more
Our iOS app shipped today. Built in 3 weeks. 10,134 downloads in 24 hours, #3 in Productivity. #shipfast
24-second motion teaser — built from your changelog. Title cards in your brand colors, screen captures of the new feature, your tagline as the kicker. #shipfast
Mainstager has no code access. The agent learns your product by chatting with you in Slack — you share context as you build, it remembers. A deploy is just the doorbell: commit messages, branch names. It already knows your product and your tone of voice — and asks what's worth saying about this ship. Your code never touches our servers.
Marketing that moves at deploy speed.
We're shipping the MVP and you get full access free during the beta — no card, no catch. Help us shape what we build next.