Software Alternatives, Accelerators & Startups

IsDown.app VS URL Void

Compare IsDown.app VS URL Void and see what are their differences

IsDown.app logo IsDown.app

When a vendor goes down, does your team find out in seconds or after users start complaining? IsDown monitors 6,000+ official status pages and alerts your team within seconds across Slack, PagerDuty, Datadog, and more. 14-day free trial

URL Void logo URL Void

Free website reputation checker tool lets you scan a website with multiple website reputation/blacklist services to check if the website is safe and legit or malicious.
  • IsDown.app All Your Vendors. One Real-Time View.
    All Your Vendors. One Real-Time View. //
    2026-03-03
  • IsDown.app 26 Integrations. Alerts Where Your Team Already Works.
    26 Integrations. Alerts Where Your Team Already Works. //
    2026-03-03
  • IsDown.app Monitor Any Vendor. Filter What Matters.
    Monitor Any Vendor. Filter What Matters. //
    2026-03-03
  • IsDown.app One Status Page for Your Whole Team.
    One Status Page for Your Whole Team. //
    2026-03-03
  • IsDown.app Full Incident Context, Not Just an Alert.
    Full Incident Context, Not Just an Alert. //
    2026-03-03
  • IsDown.app Vendor Accountability, Backed by Data.
    Vendor Accountability, Backed by Data. //
    2026-03-03

IsDown was built out of frustration at 4 AM. Nuno Tomas, founder and on-call engineer, spent 30 minutes debugging an alert before realising the cloud provider had an outage posted on their status page, but nobody was watching it. That night, he decided there had to be a better way.

Today, IsDown monitors 6,000+ cloud and SaaS services, has performed over 1 billion status checks, has detected 520,000+ outages, and has sent 5.2 million+ notifications. Trusted by IT, DevOps, and engineering teams since 2020.

What makes IsDown different: it reads official vendor status pages directly, not just crowdsourced reports. Combined with early detection signals, it catches outages before vendors acknowledge them, sometimes hours ahead. In January 2026 alone, IsDown detected 101 incidents that vendors never officially reported.

Key capabilities: - Monitor 6,000+ services from one dashboard. Filter by service, component, or severity. - Get alerts within seconds in Slack, PagerDuty, Datadog, Microsoft Teams, Incident.io, FireHydrant, Grafana, Discord, SMS, and wherever your team works. - Track scheduled maintenance across all vendors in a live feed and calendar, so nothing slips through unnoticed. - Create public or private hosted status pages with your own domain and branding. - Monitor your own APIs, endpoints, and SSL certificates from US, EU, and Asia. - Built for enterprise: SSO (SAML, OAuth), SOC 2 Type II in progress, MCP Server for AI assistant queries.

Setup takes 5 minutes. No engineering required. 14-day free trial, no credit card needed.

  • URL Void Landing page
    Landing page //
    2019-06-21

IsDown.app

Website
isdown.app
$ Details
paid Free Trial $27 / Monthly (Starter)
Platforms
Web
Release Date
2020 May
Startup details
Country
Portugal
City
Lisbon
Founder(s)
Nuno Tomás

URL Void

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

IsDown.app features and specs

  • Status Dashboard
  • Multiple Team Boards
  • Slack App
  • Zapier Integration
  • Scheduled maintenances feed
  • Weekly Digest
  • Datadog Integration
  • Uptime Monitoring
  • Keyword Monitoring
  • SSL Monitoring
  • PagerDuty Integration
  • Custom Endpoint Monitoring
  • Public Status Pages
  • Private Status Pages
  • Early Outage Detection
  • SSO / SAML
  • Microsoft Teams Integration
  • Incident.io Integration
  • Historical Uptime Data
  • MCP Server
  • Multi-region Monitoring

URL Void features and specs

  • Free to Use
    URL Void offers basic URL scanning services at no cost, making it accessible for individuals and small businesses without a budget for more advanced tools.
  • Multiple Source Checks
    The tool uses multiple security sources to check websites, providing a comprehensive assessment by pooling data from various security databases to identify potentially harmful sites.
  • Simple Interface
    URL Void provides a user-friendly interface that makes it easy to input URLs and quickly receive results, even for users who are not tech-savvy.
  • No Registration Required
    Users can access the primary functionalities of URL Void without needing to create an account, ensuring convenience and time efficiency.

Possible disadvantages of URL Void

  • Limited Features
    Compared to some paid security tools, URL Void offers a basic feature set, which may not meet the needs of users requiring detailed analysis or advanced security metrics.
  • Reliance on External Data Sources
    URL Void’s accuracy depends on the reliability and currency of the external databases it queries, which can vary and potentially lead to false positives or missed threats.
  • No Real-time Scanning
    The tool performs static checks based on existing data without real-time scanning capabilities, limiting its effectiveness against newly emerging threats.
  • No Direct Malware Removal
    URL Void only identifies potentially harmful websites but does not provide any features for cleaning or removing malware, meaning users must take additional steps to address issues.

Category Popularity

0-100% (relative to IsDown.app and URL Void)
Monitoring Tools
70 70%
30% 30
Security & Privacy
0 0%
100% 100
Website Monitoring
100 100%
0% 0
Uptime Monitoring
100 100%
0% 0

Questions & Answers

As answered by people managing IsDown.app and URL Void.

What makes your product unique?

IsDown.app's answer

IsDown monitors official vendor status pages directly, not just crowdsourced reports. This means alerts include real incident context: what broke, which components are affected, and real-time resolution status. Not just "something is down." Combined with crowdsourced early detection signals, IsDown can catch outages before vendors acknowledge them. In January 2026 alone, IsDown detected 101 incidents that vendors never officially reported. Every team monitoring cloud services already has uptime tools that ping their own URLs. IsDown tells you what is happening with the third-party services your stack depends on, before your users feel it.

Why should a person choose your product over its competitors?

IsDown.app's answer

Three reasons:

  1. Coverage: 6,000+ services monitored. If your vendor has a status page, IsDown monitors it.
  2. Speed and context: Alerts go out within seconds of an incident, with full context including affected components, official vendor description, and real-time updates. Not just a notification that something is wrong.
  3. IsDown does not replace your existing tools, it completes them. UptimeRobot and Pingdom tell you your own services are down. IsDown tells you which of your third-party vendors caused it, and exactly what is happening on their end. Setup takes 5 minutes. No engineering required.

How would you describe the primary audience of your product?

IsDown.app's answer

IsDown is built for IT managers, DevOps engineers, and SREs at companies that rely on multiple cloud and SaaS services, which means any team running on cloud infrastructure. The core audiences are DevOps and SRE teams who are on-call and need to know instantly when a third-party service causes an incident; IT managers responsible for vendor oversight and SLA compliance; MSPs and agencies managing cloud infrastructure for multiple clients; and engineering teams who want to stop wasting time debugging problems that turn out to be vendor outages. Customers span SaaS companies, schools, DevOps agencies, and enterprise IT teams across industries.

What's the story behind your product?

IsDown.app's answer

IsDown was built out of frustration at 4 AM. Nuno Tomas, the founder, was on-call when a PagerDuty alert woke him up. After 30 minutes of debugging, he realised the problem was not his code. It was the cloud provider. They had posted an outage on their status page, but nobody on the team was watching it. That night, he decided there had to be a better way. He built the first version of IsDown so his team would never be the last to know about a vendor outage. Founded in 2020, IsDown has since grown to monitor 6,000+ services, perform over 1 billion status checks, detect 520,000+ outages, and send 5.2 million+ notifications. The same problem Nuno solved for his team that night is now solved for IT, DevOps, and engineering teams around the world.

Who are some of the biggest customers of your product?

IsDown.app's answer

IsDown is used by IT, DevOps, and engineering teams across SaaS companies, MSPs, DevOps agencies, schools, and enterprise IT departments.

Which are the primary technologies used for building your product?

IsDown.app's answer

IsDown is a web-based SaaS application. The core product runs on modern cloud infrastructure with multi-region monitoring across US, EU, and Asia to ensure reliable status checks and fast alert delivery worldwide. IsDown integrates directly with Slack, PagerDuty, Datadog, Microsoft Teams, Incident.io, FireHydrant, Grafana, Rootly, Zendesk, and more, connecting alerts to wherever your team already works. For teams using AI assistants, IsDown offers an MCP (Model Context Protocol) Server that allows querying IsDown data directly from AI tools like Claude or ChatGPT.

User comments

Share your experience with using IsDown.app and URL Void. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, URL Void should be more popular than IsDown.app. It has been mentiond 10 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

IsDown.app mentions (6)

  • Top 10 Statuspage.io Alternatives in 2025
    A specialized status page aggregator designed for internal team communication and vendor dependency monitoring. Unlike public status page creators, IsDown monitors 4,500+ third-party vendor status pages (AWS, Azure, GitHub, Stripe, etc.) and lets you create private status pages with SSO protection. - Source: dev.to / 8 months ago
  • Build or Buy Your Third-Party Monitoring System: Decision Guide
    Consider your growth trajectory. Will you be monitoring 10 services or 1000? Commercial solutions like IsDown are designed to scale effortlessly, while custom solutions often require significant rework as requirements grow. - Source: dev.to / 11 months ago
  • Best Downdetector Alternatives for Outage Monitoring in 2025
    Among them, IsDown stands out as a robust, business-focused solution. With real-time alerts, aggregated data from thousands of services, seamless integrations, and customizable dashboards, IsDown helps businesses stay ahead of outages and reduce downtime. Its combination of official updates and crowdsourced insights ensures accurate and timely information for faster response times. - Source: dev.to / about 1 year ago
  • Bring third-party incidents into Better Stack
    The Better Stack integration is included with every paid IsDown plan. Sign up for a free 14-day trial — or open Alerts & Integrations in your current IsDown account and add Better Stack now. Your team will see live incidents from AWS, Stripe, GitHub, and hundreds more, all inside the queue they already trust. - Source: dev.to / over 1 year ago
  • Connect all your vendors status pages to your Better Stack account
    Now you can monitor third-party outages right in your Better Stack account with https://isdown.app . What will you get? Single incident feed – Internal alerts and third-party outages appear in the same view. - Source: Hacker News / over 1 year ago
View more

URL Void mentions (10)

  • Is it just me or is AT&T Premier down?
    If I use sites like urlvoid.com and isitdownrightnow.com, they show everything is fine. Source: about 3 years ago
  • Amazon Shopping App leaked my data
    But even without a thorough analysis one can easily find out that this is scam. Here is the link to a safety report generated by urlvoid.com. This cite has not been widely banned because it is relatively new. Last week 3 out of 40 scanning engines triggered an alarm. I am pretty sure, that if you perform this check now, there will be more. Source: about 3 years ago
  • 1 security vendor flagged this URL as malicious
    I also ran it through urlvoid.com which had 1/40 security venders flag it. This time it was SCUMWARE. Lastly, I ran it through https://safeweb.norton.com/ which said the link was OK. Source: over 3 years ago
  • Eero not allowing certain domains
    It's probably a false-positive. If you want to check the domain against DNS blacklists, I favor urlvoid.com for this. Source: over 3 years ago
  • This site pretends to be a CS:GO platform (like FACEIT) but it will steal you account information!
    Someone added me as a Steam friend without pretext (A red flag I know) and claimed to have played CS:GO with me on FACEIT recently. This user was now looking for people to play an online tournament with and asked if I wanted to join, but I had to register an account with my steam credentials on this website - htpps://expcup.live/ -. Instead I looked it up on urlvoid.com and found the domain expcup is only two days... Source: over 3 years ago
View more

What are some alternatives?

When comparing IsDown.app and URL Void, you can also consider the following products

StatusGator - Early outage alerts for every app you rely on

URLscan.io - urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.

UptimeRobot - Free Website Uptime Monitoring

VirusTotal - VirusTotal is a free service that analyzes suspicious files and URLs and facilitates the quick...

Phare.io - Keep your website up and running, empower your team with efficient incident management and keep your users informed during hard times.

WOT Web of Trust - Check if a website is safe before you reach it via browser extensions, mobile app and API.