End the back-and-forth.
Give feedback right in Slack.

Paste a URL in Slack. Open a live, interactive preview on every device. Click anywhere on the page to leave pinned feedback your developer can actually act on. No more arrows on static images. No more "can you see what I mean?" messages.

Start Free Trial See How It Works

You know this feedback loop.

You take a screenshot. You draw an arrow on it. You paste it into Slack with a message like "the button on the right, can you move it down?" Your developer asks which button. You take another screenshot.

Days of back-and-forth. Mockups and specs that need updating after every review. Things getting lost between Slack, email, and whatever other tool your developer prefers.

The bottleneck was never the build. It was communicating what you actually want changed.

Built for founders, not designers.

You don't need a design tool. You need a way to point at something on your website and say "this needs to change" — from the tool you already live in.

First-time founders

Getting your first website or product built and need a fast way to communicate what's wrong without learning Figma.

Non-technical founders

Working with freelance developers or small dev teams. You know what you want — you just need a better way to show it.

Small teams on Slack

Your team already lives in Slack. Feedback should happen there too, not in another tool nobody wants to log into.

Three steps. No context switching.

1

Paste a URL in Slack

Drop your website link into any channel. Simpl_Markup opens an interactive preview of your page across desktop, tablet, and mobile — right in your thread.

2

Click to leave feedback

Click anywhere on the page to drop a pin. Say what needs to change. Your comment posts to Slack with a cropped view of exactly what you're pointing at — no confusion about what you mean.

3

Resolve and move on

Your developer fixes it and hits "Resolve" in Slack. You approve when you're happy. The whole review cycle stays in one place.

One price. Your whole team.

No per-seat fees. No surprise bills. Invite everyone.

$29.95

/month per workspace

14-day free trial

Start Free Trial

Frequently asked questions

What is Simpl_Markup?
A Slack-first feedback tool for websites. Paste a URL, open an interactive preview on every device, click to leave pinned comments on the live page, and resolve everything from Slack. No more taking screenshots, drawing arrows, and hoping your developer understands what you mean.
Do I need to install anything?
Just add the Simpl_Markup app to your Slack workspace. Takes under 2 minutes. No browser extensions, no desktop apps, no accounts for your developer to create.
How is this different from other feedback tools?
Most tools are standalone apps that add another tab to your already-overflowing browser. Simpl_Markup lives in Slack — where your team already works. Your developer can reply, resolve, and close feedback without ever opening another tool. And we charge $29.95/month for unlimited users, not per seat.
Who is this for?
Founders working with developers on their website. If you've ever taken a screenshot, drawn an arrow on it, and sent it over Slack with "can you fix this?" — this is for you.
What if I need more than Slack?
There's a full web app for deeper review sessions — drawing annotations, threaded discussions, device viewport switching, and project approval workflows. But most feedback happens right in Slack.

Stop the back-and-forth.

Click on what's wrong. Say what needs to change. Move on.

Start Your 14-Day Free Trial