Software Alternatives, Accelerators & Startups

React Native Paper by Callstack VS IsDown.app

Compare React Native Paper by Callstack VS IsDown.app and see what are their differences

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React Native Paper by Callstack logo React Native Paper by Callstack

Material Design for React Native (Android & iOS)

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
  • React Native Paper by Callstack Landing page
    Landing page //
    2023-10-16
  • 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,ย 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.

IsDown.app

Website
isdown.app
$ Details
paid Free Trial $27.0 / Monthly (Starter)
Platforms
Web
Release Date
2020 May
Startup details
Country
Portugal
City
Lisbon
Founder(s)
Nuno Tomรกs

React Native Paper by Callstack features and specs

  • Cross-Platform Compatibility
    React Native Paper provides a consistent design and behavior across both iOS and Android platforms, allowing developers to build applications that work seamlessly on multiple devices.
  • Material Design Integration
    The library is based on Google's Material Design, offering a set of pre-built, highly customizable components that enable developers to achieve a cohesive look and feel for their applications.
  • Theming Support
    React Native Paper includes comprehensive theming support, allowing developers to easily switch themes and adjust colors to meet brand requirements or user preferences.
  • Active Community and Support
    Being maintained by Callstack, a company with significant expertise in React Native, ensures that React Native Paper is well-documented, frequently updated, and supported by an active community.
  • Customizable Components
    The components provided by React Native Paper are highly customizable, enabling developers to override default styles and functionalities to better suit their application's needs.

Possible disadvantages of React Native Paper by Callstack

  • Performance Overhead
    While React Native Paper provides many useful components, integrating it into a project can introduce some performance overhead, which might be noticeable in resource-constrained environments.
  • Learning Curve
    Developers new to React Native Paper or Material Design may face a learning curve understanding how to effectively use and customize the components according to the design guidelines.
  • Lacks Advanced Components
    Although React Native Paper covers most of the basic UI components, it may lack some advanced components or features, which might require developers to integrate additional libraries.
  • Dependency on Material Design
    Since React Native Paper relies heavily on Material Design principles, it may not be suitable for applications that require a unique or non-material design aesthetic.

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

Category Popularity

0-100% (relative to React Native Paper by Callstack and IsDown.app)
React Native
100 100%
0% 0
Monitoring Tools
0 0%
100% 100
Development Tools
100 100%
0% 0
Website Monitoring
0 0%
100% 100

Questions & Answers

As answered by people managing React Native Paper by Callstack and IsDown.app.

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,ย 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.

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Social recommendations and mentions

Based on our record, React Native Paper by Callstack should be more popular than IsDown.app. It has been mentiond 12 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.

React Native Paper by Callstack mentions (12)

  • 5 Easy Methods to Implement Dark Mode in React Native
    Several UI libraries are available for React Native developers today. One of the most prominent is React Native Paper, a cross-platform material design for React Native. It is a collection of customizable and production-ready components for React Native, following Googleโ€™s Material Design guidelines. With 30+ customizable components, it is a great choice to use with Material UI. - Source: dev.to / over 1 year ago
  • Exploring the Best UI Component Libraries for React Native apps
    React Native Paper is a set of customizable and production-ready React Native components based on Google's Material Design specifications. It offers an option for integrating a Babel plugin, thereby minimizing its bundle size by eliminating modules that are not in use. Overall, React Native Paper is a popular choice for developers looking to create aesthetically pleasing user interfaces for React Native... - Source: dev.to / over 2 years ago
  • 7 Popular React Native UI Component Libraries You Should Know
    React Native Paper is a collection of customizable and production-ready components for React Native, following Googleโ€™s Material Design guidelines. Global theming support and an optional babel plugin to reduce bundle size are also there. - Source: dev.to / over 3 years ago
  • Is There Something Like Bootstrap (or Responsive design) in React Native?
    Nothing exists that I'm aware of like bootstrap in that sense, especially because people are typically moving away from it. There are UI kits like react-native-paper and Tamagui that exports pre-styled components. Source: over 3 years ago
  • is there a react native equal to MUI for reactjs?
    You don't name what kind of components you want to have all in one lib so I think react native paper is close to MUI visually. Source: over 3 years ago
View more

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 / 7 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 / 10 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 / 12 months 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 โ€” 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 / about 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 โ€“ Internal alerts and third-party outages appear in the same view. - Source: Hacker News / about 1 year ago
View more

What are some alternatives?

When comparing React Native Paper by Callstack and IsDown.app, you can also consider the following products

NativeBase - Experience the awesomeness of React Native without the pain

StatusGator - Early outage alerts for every app you rely on

React Native UI Kitten - Customizable and reusable react-native component kit

UptimeRobot - Free Website Uptime Monitoring

React Navigation - Description will go into a meta tag in <head />

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