DiffHook monitors web pages, prices and APIs and sends webhook alerts to Slack, Zapier, n8n and more. Plans from $12/month with a 14-day free trial.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
DiffHook is a website change monitoring service that watches web pages, prices, policies and APIs, then alerts people or systems when something changes. Its homepage frames the problem as silent web changes that become silent costs, such as a competitor price cut, a regulatory update or a vendor status page that quietly degrades.
The About page gives the product a more specific identity. DiffHook is described as a webhook delivery engine for web change events, aimed at developers who run automation in tools like n8n, Make or Zapier and want a webhook rather than an email. The company says it built the product after finding existing tools either too consumer-oriented or too hard to self-host.
DiffHook is built and operated by KupaLabs FZCO, a company registered in Dubai, UAE, and the site describes it as an indie micro-SaaS run by a small team.
A user points DiffHook at a URL and chooses what to track: the full page, or a single element such as a price, a clause or a status label. The user then picks a destination for alerts and a polling interval. According to the About page, when content changes DiffHook sends a POST request containing a structured diff.
Smart comparison filters are meant to remove layout and cosmetic changes, so only changes the team needs to act on produce an alert. Delivery is signed, retried automatically with exponential backoff, and recorded in a delivery log, so a temporarily unavailable endpoint does not lose events.
The company states that most teams have a first monitor running in under five minutes, with no engineer required for common workflows. Developers can use the REST API directly, and the documentation is described as opening with a curl command.
DiffHook supports several monitor types: web pages, JSON APIs, sitemaps and RSS or Atom feeds. CSS and XPath selectors allow element-level tracking. AI alert modes cover price, availability, new items and custom prompts, and visual checks are included with monthly allowances on every plan.
Notifications can go to unlimited webhook endpoints, email, Telegram, Discord, Google Sheets, an RSS server, Slack, Microsoft Teams and Jira, depending on the destination. The homepage also names n8n, Make, Zapier, Notion, Airtable and Linear as tools DiffHook connects to.
On the data side, plans include log history from 30 days to 1 year, log storage from 50 GB to 500 GB, HMAC webhook signatures and REST API access. Seats range from 2 on Starter to unlimited on Business, and the homepage mentions SSO, role-based access and EU hosting on request.
DiffHook is a website change monitoring service that watches web pages, JSON APIs, sitemaps and RSS feeds. When something changes, it sends a structured alert to a webhook or to tools such as Slack, email and Discord. It is built and operated by KupaLabs FZCO.
The pricing page lists Starter at $12 per month, Pro at $29 per month and Business at $79 per month, with annual billing shown at 25% off. Add-ons for extra visual checks, log storage and extra monitor packs are sold separately. The homepage shows a different lineup including a Free plan, so check the current pricing page.
Yes. The pricing page states a 14-day free trial on the Starter plan. The homepage also advertises starting free with no credit card, and lists a Free plan with 5 monitors and daily checks.
DiffHook can notify Slack, Microsoft Teams, Discord, Telegram, email, Jira, Google Sheets and an RSS server, or post to any webhook URL. The site also lists n8n, Make, Zapier, Notion, Airtable and Linear as connected tools. A REST API is available.
It supports web pages, JSON APIs, sitemaps and RSS or Atom feeds. CSS and XPath selectors allow tracking a single element, such as a price or a status label. AI alert modes cover price, availability, new items and custom prompts.
The minimum polling interval depends on the plan: 15 minutes on Starter, 5 minutes on Pro and 1 minute on Business, per the pricing page. The homepage lists different intervals for its plans.
It fits developers and automation builders who want change events delivered by webhook into tools like n8n, Make or Zapier. It also suits sales, compliance and operations teams that track competitors, regulations or vendor status pages.
The site says alerts are signed, retried automatically with exponential backoff and kept in a delivery log. It states that traffic is encrypted in transit, that practices follow SOC 2 guidance, and that EU-only hosting is available on request. Enterprise customers can ask about private cloud, single-tenant or on-prem deployment.