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Watch for changes on any website.

Describe what you care about in plain language. modsignal checks the page and alerts you only when it truly changes, with evidence attached.

Get startedSee how it works

Set up a monitor in seconds

Describe the change you care about, or point at the part of the page that matters. Either way, you get an evidence-backed alert when it happens.

Describe it in plain language

A prompt becomes a configured monitor — name, URL, and check tier suggested for you.

Or click what you want watched

Load any page, click a section, and watch exactly that — nothing else.

What an alert actually looks like.

Exactly what lands in your inbox — what changed, how confident we are, and the evidence to check our work.

  1. New since July 19Competitor pricing96% confidence

    Linear removed the 14-day free trial from its Business plan.

    View evidence
    Before
    Business — $14/user/mo — 14-day free trial
    After
    Business — $14/user/mo — no free trial, contact sales

    --- before

    +++ after

    @@ -1 +1 @@

    -Business — $14/user/mo — 14-day free trial

    +Business — $14/user/mo — no free trial, contact sales

  2. New since July 20App marketplace92% confidence

    A new 1-star review on "Order Sync Pro" mentions failed webhook retries and slow support response.

    View evidence
    Before
    4.7 stars · 312 reviews
    After
    4.6 stars · 313 reviews · new 1-star review

    --- before

    +++ after

    @@ -1 +1 @@

    -4.7 stars · 312 reviews

    +4.6 stars · 313 reviews · new 1-star review

  3. New since July 18Vendor and legal98% confidence

    Acme added OpenAI as a subprocessor, based in the US, for "AI-powered support."

    View evidence
    Before
    Subprocessors: AWS (US), Twilio (US), Segment (US)
    After
    Subprocessors: AWS (US), Twilio (US), Segment (US), OpenAI (US) — AI-powered support

    --- before

    +++ after

    @@ -1 +1 @@

    -Subprocessors: AWS (US), Twilio (US), Segment (US)

    +Subprocessors: AWS (US), Twilio (US), Segment (US), OpenAI (US) — AI-powered support

How it works

  1. 01

    Describe it in plain language

    “Alert me when this vendor adds a subprocessor outside the EU.” No selectors, no regex, no dashboard of settings to configure first.

  2. 02

    We watch the page

    modsignal checks it on the schedule you set, using the tier your prompt needs: an exact diff, a semantic read, or a full browser render.

  3. 03

    You get evidence-backed alerts

    One sentence describing what changed, a confidence score, and the before and after. Nothing fires unless it matches what you asked for.

Three ways to check a page.

Every monitor picks one. Start cheap and exact; move up when the page needs more than a text diff to understand.

Starter — $19/mo
Starter — $24/mo
Pick a tier per monitor · start free

What people watch most.

Set up monitors for the most common use cases from our templates. See which prompts work best for other customers and tweak them to your needs.

Competitor pricingSaaS founders and product teamsApp marketplaceShopify and Atlassian app vendorsVendor and legalSecurity and operations teamsProduct and APIDevelopers and product teamsCompetitor productProduct marketing and competitive intel teamsRegulatory and complianceCompliance and legal teamsHiring signalsSales and talent intelligence teamsTenders and procurementBid teams and public-sector suppliersBrand and news mentionsComms and PR teamsAll use casesPersonal use, too — 15 in all

Set up your first monitor today.

Write the prompt, set the interval and get the first alert when something actually changes.

Get started