Same job as Visualping. Output is a webhook, not a screenshot inbox.
Visualping is built for humans comparing pictures. SignalWatch is built for operators who already have Slack, Discord, n8n, or a script. We fetch a public URL, hash the visible text (optional CSS selector), and POST when it drifts or the fetch fails.
Screenshot emails do not compose. You cannot pipe a PNG into a deploy bot. SignalWatch sends email or POSTs JSON: event, URL, status, hash, and a unified diff.
Slack is often a high-tier add-on. Visualping/Distill-class tools routinely put Slack behind $100–$140 plans. SignalWatch includes Slack incoming webhooks on free.
Cookie banners page you. Point a CSS selector at #pricing or .plan-price. The rest of the page can churn.
You already have an API client. Create monitors with X-API-Key. The dashboard is optional.
When to stay on Visualping
Stay if you need pixel diffs, region screenshots, or watching a logged-in app. SignalWatch will not log in, solve a CAPTCHA, or render a browser screenshot. That is a different product. Honest split, full table: alternatives.
Price to switch
Free: 3 public URLs, 15-minute interval, CSS selector, Slack/Discord/JSON. Pro: $12/mo, 50 URLs, 5-minute interval. Business: $29/mo, 500 URLs, 2-minute interval. No “credits per screenshot.”
FAQ
Is SignalWatch a Visualping alternative?
Yes if you want an API and a JSON/Slack webhook instead of screenshot emails. Visualping is stronger for pixel diffs and logged-in pages. SignalWatch is stronger for automation on public URLs.
Does SignalWatch send Slack alerts on the free plan?
Yes. Paste a Slack incoming webhook, Discord webhook, or any HTTPS JSON URL on a monitor. Slack is not a paid add-on.
How much does this Visualping alternative cost?
Free for 3 monitors at 15 minutes. Pro is $12/month. No credit card to start.
SignalWatch