Probecast vs IsDown
A vendor status monitor: it follows the official status pages of thousands of cloud services, adds crowd reports and its own uptime checks, then alerts your team in the tools it already uses.
The short version
IsDown tracks what vendors announce across thousands of services, with your own uptime checks beside them and an MSP view across clients. Probecast checks providers directly and ties every outage to the client projects that depend on it, with revenue, support and a monthly report. Widest vendor coverage, pick IsDown; client impact and reports, pick Probecast.
Probecast is monitoring plus monthly client reports for devs and agencies who ship projects for other people. It watches websites, APIs, cron jobs, TCP ports, browser flows and public MCP servers from 4 regions, groups everything by client and ends each month in a client report (from Pro; white-label on Agency) — with an API, a CLI and an MCP server so your coding agent can manage monitors too.
What each one does.
Method
IsDown
Official status pages, crowd reports and its own uptime checks
Probecast
Its own checks against providers — HTTP and MCP handshakes from 4 regions
Coverage of third-party services
IsDown
Thousands of vendors — wider than Probecast
Probecast
1,000+ providers plus public MCP servers, each checked directly
Your own sites and APIs
IsDown
Uptime monitors for websites and APIs
Probecast
Websites, APIs, heartbeats, TCP and browser flows
Multi-client view
IsDown
MSP plan with a super admin view across clients
Probecast
Clients as the unit: per-client status pages and reports from Pro; team scoping on Agency
What an incident means for each client
IsDown
Grouped by vendor and board
Probecast
Providers attach to client products — one outage shows every client it touches
Integrations
IsDown
Wide: chat tools, incident platforms, Datadog, Grafana, Zendesk, ServiceNow and Zapier
Probecast
Email, Slack, web push and webhooks; helpdesk counts per client on Agency
API and MCP
IsDown
API and an MCP server on higher plans
Probecast
REST API, CLI and MCP server on every paid plan
Capabilities checked November 2026 · IsDown details from public materials — tell us if something is out of date
IsDown pricing
Tiered plans by monitor count, boards and status pages, plus an MSP plan for multi-client teams. Pricing on isdown.app.
Probecast pricing
Basic, free (one project, 10 catalog providers) · Indie $10 · Pro $50 · Agency $250/mo.
When IsDown is the better choice
- You need the official status of thousands of SaaS vendors in one feed.
- Your team lives in incident tools like PagerDuty, Opsgenie or ServiceNow and wants vendor status there.
- Crowd reports help you catch outages early.
When Probecast is the better choice
- You want direct measurement of the providers your clients use, not only what the vendor has posted.
- A provider outage should answer "which of my clients does this touch?".
- The month should end in a report the client can read.
Is the IsDown catalog bigger?
Yes — IsDown follows thousands more vendors than the Probecast catalog. Probecast's catalog is smaller on purpose: each provider is checked directly from four regions and attached to the client projects that depend on it.
Can I use both?
Yes. Teams that want the vendor's official word in their incident tools keep an aggregator; Probecast adds the direct measurement and the client layer — status pages, reports and what each outage touched.
See it with your own projects.
Start free with one project — or add a monitor from the terminal with npx probecast.
IsDown is a trademark of its owner. Probecast is not affiliated with and does not endorse or disparage IsDown; this page reflects public information as of November 2026 and both products evolve. Found an error? Tell us at probecast.io/contact and we will fix it.