Testing & Monitoring

Testing

Appetize - Test your Android & iOS apps on this Cloud Based Android Phone / Tablets emulator and iPhone/iPad simulators directly in your browser. The free tier includes two concurrent session with 30 minutes of usage per month. No limit on app size.
Argos - Open Source visual testing for developers. Unlimitedprojects, with 5,000 screenshots per month. Free for open-source projects.
Bencher - A continuous benchmarking tool suite to catch CI performance regressions. Free for all public projects.
BugBug - Lightweight test automation tool for web applications. It is easy to learn and doesn't require coding. You can run unlimited tests on your own computer for free. You also get cloud monitoring and CI/CD integration for an additional monthly fee.
CheckAPI - API health monitoring with Silent Failure Detection — validates response body via JSON Path assertions and regex, not just HTTP status codes. Free plan includes 10 monitors, 5-minute intervals, all 5 alert channels (Email, Slack, Telegram, Discord, Webhook), and is free for commercial use with no time limit.
checkbot.io - Browser extension that tests if your website follows 50+ SEO, speed and security best practices. Free tier for smaller websites.
Checkly - Code-first synthetic monitoring for modern DevOps. Monitor your APIs and apps at a fraction of the price of legacy providers. Powered by a Monitoring as Code workflow and Playwright. Generous free tier for devs.
CORS-Tester - A free tool for developers and API testers to check if an API is CORS-enabled for a given domain and identify gaps. Get actionable insights.
cypress.io - Fast, easy and reliable testing for anything that runs in a browser. Cypress Test Runner is always free and open-source with no restrictions and limitations. Cypress Dashboard is free for open-source projects for up to 5 users.
everystep-automation.com - Records and replays all steps made in a web browser and creates scripts, free with fewer options
gridlastic.com - Selenium Grid testing with a free plan of up to 4 simultaneous selenium nodes/10 grid starts/4,000 test minutes/month
katalon.com - Provides a testing platform that can help teams of all sizes at different levels of testing maturity, including Katalon Studio, TestOps (+ Visual Testing free), TestCloud, and Katalon Recorder.
Keploy - Keploy is a functional testing toolkit for developers. Recording API calls generates E2E tests for APIs (KTests) and mocks or stubs(KMocks). It is free for Open Source projects.
kogiQA - A web UI automation tool that functions without the need for selectors. Every developer gets 500 actions per month for free.
loadmill.com - Automatically create API and load tests by analyzing network traffic. Simulate up to 50 concurrent users for up to 60 minutes for free monthly.
lost-pixel.com - holistic visual regression testing for your Storybook, Ladle, Histoire stories and Web Apps. Unlimited team members, totally free for open-source, 7,000 snapshots/month.
pagegym.com - Load behvariour and page speed analysis and optimization tool. The free plan provides 10 tests per day, 5 experiments per week, and 15 GB of maximum ingested data per month.
percy.io - Add visual testing to any web app, static site, style guide, or component library. Unlimited team members, Demo app, and unlimited projects, 5,000 snapshots/month.
qase.io - Test management system for Dev and QA teams. Manage test cases, compose test runs, perform tests, track defects, and measure impact. The free tier includes all core features, with 500MB available for attachments and up to 3 users.
Repeato - No-code mobile app test automation tool built on top of computer vision and AI. Works for native apps, flutter, react-native, web, ionic, and many more app frameworks. The free plan is limited to 10 tests for iOS and 10 for Android, but includes most of the features of the paid plans, including unlimited test runs.
Requestly - Open-source Chrome Extension to Intercept, Redirect and Mock HTTP Requests. Featuring [Debugger](https://requestly.com/products/web-debugger/), [Mock Server](https://requestly.com/products/mock-server/), [API Client](https://requestly.com/products/api-client/) and [Session Recording](https://requestly.com/products/session-book/). Redirect URLs, Modify HTTP Headers, Mock APIs, Inject custom JS, Modify GraphQL Requests, Generate Mock API Endpoints, Record session with Network & Console Logs. Create upto 10 rules in Free Tier. Free for open-source.
seotest.me - Free on-page SEO website tester. 10 free website crawls per day. Useful SEO learning resources and recommendations on how to improve the on-page SEO results for any website regardless of technology.
snippets.uilicious.com - It's like CodePen but for cross-browser testing. UI-licious lets you write tests like user stories and offers a free platform - UI-licious Snippets - that allows you to run unlimited tests on Chrome with no sign-up required for up to 3 minutes per test run. Found a bug? You can copy the unique URL to your test to show your devs exactly how to reproduce the bug.
SSR (Server-side Rendering) Checker - Check SSR (server-side rendering) for any URL by visually comparing the server rendered version of the page with the regular version.
testingbot.com - Selenium Browser and Device Testing, [free for Open Source](https://testingbot.com/open-source)
Testspace.com - A Dashboard for publishing automated test results and a Framework for implementing manual tests as code using GitHub. The service is [free for Open Source](https://github.com/marketplace/testspace-com) and accounts for 450 monthly results.
tesults.com - Test results reporting and test case management. Integrates with popular test frameworks. Open Source software developers, individuals, educators, and small teams getting started can request discounted and free offerings beyond basic free projects.
UseWebhook.com - Capture and inspect webhooks from your browser. Forward to localhost, or replay from history. Free to use.
Vaadin - Build scalable UIs in Java or TypeScript, and use the integrated tooling, components, and design system to iterate faster, design better, and simplify the development process. Unlimited Projects with five years of free maintenance.
webhook.site - Verify webhooks, outbound HTTP requests, or emails with a custom URL. A temporary URL and email address are always free.
websitepulse.com - Various free network and server tools.

Log Management

bugfender.com - Free up to 100k log lines/day with 24 hours retention
log.dog - LogDog is a remote debugging/logging SDK (iOS and Android) with a web ui. Captures all logs, requests and events in real-time and allows to intercept them. Free for up to 100MB of logs every month
logflare.app - Free for up to 12,960,000 entries per app per month, 3 days retention
logtail.com - ClickHouse-based SQL-compatible log management. Free up to 1 GB per month, three days retention.
logzab.com - Audit trail management system. Free 1,000 user activity logs per month, 1-month retention, for up to 5 projects.
ManageEngine Log360 Cloud - Log Management service powered by Manage Engine. Free Plan offers 50 GB storage with 15 days Storage Retention and 7 days search.
openobserve.ai - 200 GB Ingestion/month free, 15 Days Retention
Smart Grow Logs - Centralized log management platform with end-to-end encryption, real-time alerts, and multi-platform SDKs. Free tier includes up to 3.000 logs per day.

Monitoring

assertible.com - Automated API testing and monitoring. Free plans for teams and individuals.
Better Stack - Uptime monitoring, incident management, on-call scheduling/alerting, and status pages in a single product. The free plan includes ten monitors with 3-minute check frequency and status pages.
bleemeo.com - Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules.
Checkly - Code-first synthetic monitoring for modern DevOps. Monitor your APIs and apps at a fraction of the price of legacy providers. Powered by a Monitoring as Code workflow and Playwright. Generous free tier for devs.
Core Web Vitals History - Find Core Web Vitals history for a url or a website.
cronitor.io - Performance insights and uptime monitoring for cron jobs, websites, APIs and more. A free tier with five monitors.
datadoghq.com - Free for up to 5 nodes
deadmanssnitch.com - Monitoring for cron jobs. One free snitch (monitor), more if you refer others to sign up
downtimemonkey.com - 60 uptime monitors, 5-minute interval. Email, Slack alerts.
economize.cloud - Economize helps demystify cloud infrastructure costs by organizing cloud resources to optimize and report the same. Free for up to $5,000 spent on Google Cloud Platform every month.
fivenines.io - Linux server monitoring with real‑time dashboards and alerting - free forever for up to 5 monitored servers at 60-seconds interval. No credit card required.
FlareWarden - Uptime, content, dependency, and SSL monitoring with multi-region verification and status pages. Free plan includes 15 monitors, 5-minute checks, and 90 days of history.
Grafana Cloud - Grafana Cloud is a composable observability platform that integrates metrics and logs with Grafana. Free: 3 users, ten dashboards, 100 alerts, metrics storage in Prometheus and Graphite (10,000 series, 14 days retention), logs storage in Loki (50 GB of logs, 14 days retention)
healthchecks.io - Monitor your cron jobs and background tasks. Free for up to 20 checks.
incidenthub.cloud - Cloud and SaaS status page aggregator - 20 monitors and 2 notification channels (Slack and Discord) are free forever.
inspector.dev - A complete Real-Time monitoring dashboard in less than one minute with a free forever tier.
instatus.com - Get a beautiful status page in 10 seconds. Free forever with unlimited subs and unlimited teams.
isitdownstatus.com - Free public JSON API returning real-time status for 500+ popular services (GitHub, Stripe, AWS, etc.). No auth required, CORS enabled.
linkok.com - Online broken link checker, free for small websites up to 100 pages, completely free for open-source projects.
loader.io - Free load testing tools with limitations
Middleware.io - Middleware observability platform provides complete visibility into your apps & stack, so you can monitor & diagnose issues at scale. They have a free forever plan for Dev community use that allows Log monitoring for up to 1M log events, Infrastructure monitoring & APM for up to 2 hosts.
MonitorMonk - Minimalist uptime monitoring with beautiful status pages. The Forever Free plan offers HTTPS, Keyword, SSL and Response-time monitorming for 10 websites or api-endpoints, and provides 2 dashboards/status pages.
netdata.cloud - Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub!
newrelic.com - New Relic observability platform built to help engineers create more perfect software. From monoliths to serverless, you can instrument everything and then analyze, troubleshoot, and optimize your entire software stack. The free tier offers 100GB/month of free data ingest, one free full-access user, and unlimited free primary users.
OnlineOrNot.com - OnlineOrNot provides uptime monitoring for websites and APIs, monitoring for cron jobs and scheduled tasks. Also provides status pages. The first five checks with a 3-minute interval are free. The free tier sends alerts via Slack, Discord, and Email.
OntarioNet.ca CN Test - Check if a website is blocked in China by the Great Firewall. It identifies DNS pollution by comparing DNS results and ASN information detected by servers in China versus servers in the United States.
pagecrawl.io - Monitor website changes, free for up to 6 monitors with daily checks.
pagertree.com - Simple interface for alerting and on-call management. Free up to 5 users.
phare.io - Uptime Monitoring free for up to 100,000 events for unlimited projets and unlimited status pages.
pingbreak.com - Modern uptime monitoring service. Check unlimited URLs and get downtime notifications via Discord, Slack, or email.
Pingmeter.com - 5 uptime monitors with 10-minute interval. Monitor SSH, HTTP, HTTPS, and any custom TCP ports.
pingpong.one - Advanced status page platform with monitoring. The free tier includes one public customizable status page with an SSL subdomain. Pro plan is offered to open-source projects and non-profits free of charge.
Pulsetic - 10 monitors, 6 Months of historical Uptime/Logs, unlimited status pages, and custom domains included! For infinite time and unlimited email alerts for free. You don't need a credit card.
robusta.dev - Powerful Kubernetes monitoring based on Prometheus. Bring your own Prometheus or install the all-in-one bundle. The free tier includes up to 20 Kubernetes nodes. Alerts via Slack, Microsoft Teams, Discord, and more. Integrations with PagerDuty, OpsGenie, VictorOps, DataDog, and many other tools.
Servervana - Advanced uptime monitoring with support for large projects and teams. Provides HTTP monitoring, Browser based monitoring, DNS monitoring, domain monitoring, status pages and more. The free tier includes 10 HTTP monitors, 1 DNS monitor and one status page.
Simple Observability - Powerful server monitoring in a unified platform for metrics and logs, with no setup complexity. Free for one server.
sitesure.net - Website and cron monitoring - 2 monitors free
skylight.io - Free for first 100,000 requests (Rails only)
stathat.com - Get started with ten stats for free, no expiration
statuscake.com - Website monitoring, unlimited tests free with limitations
statusgator.com - Status page monitoring, 3 monitors free
supaguard.app - Synthetic monitoring from 20+ global regions. The free tier includes 1,000 browser checks/mo with AI-driven self-healing and automated test generation.
SweetUptime - Server monitoring, uptime monitoring, DNS & domain monitoring. Monitor 10 server, 10 uptime, and 10 domain for free.
syagent.com - Noncommercial free server monitoring service, alerts and metrics.
UptimeObserver.com - Get 20 uptime monitors with 5-minute intervals and a customizable status page-even for commercial use. Enjoy unlimited, real-time notifications via email and Telegram. No credit card needed to get started.
uptimetoolbox.com - Free monitoring for five websites, 3-minute intervals, public statuspage.
Wachete - monitor five pages, checks every 24 hours.
Xitoring.com - Uptime monitoring: 20 free, Linux and Windows Server monitoring: 5 free, Status page: 1 free - Mobile app, multiple notification channel, and much more!

Crash and Exception Handling

Axiom - Store up to 0.5 TB of logs with 30-day retention. Includes integrations with platforms like Vercel and advanced data querying with email/Discord notifiers.
Bugsink - Error-tracking with Sentry-SDK compatability. Free for up to 5,000 errors/month, or unlimited use when self-hosted.
bugsnag.com - Free for up to 2,000 errors/month after the initial trial
CatchJS.com - JavaScript error tracking with screenshots and click trails. Free for open-source projects.
elmah.io - Error logging and uptime monitoring for web developers. Free Small Business subscription for open-source projects.
Embrace - Mobile app monitoring. Free for small teams with up to 1 million user sessions per year.
exceptionless - Real-time error, feature, log reporting, and more. Free for 3k events per month/1 user. Open source and easy to self-host for unlimited use.
GlitchTip - Simple, open-source error tracking. Compatible with open-source Sentry SDKs. 1000 events per month for free, or can self-host with no limits
honeybadger.io - Exception, uptime, and cron monitoring. Free for small teams and open-source projects (12,000 errors/month).
Jam - Developer friendly bug reports in one click. Free plan with unlimited jams.
memfault.com - Cloud device observability and debugging platform. 100 devices free for [Nordic](https://app.memfault.com/register-nordic), [NXP](https://app.memfault.com/register-nxp), and [Laird](https://app.memfault.com/register-laird) devices.
rollbar.com - Exception and error monitoring, free plan with 5,000 errors/month, unlimited users, 30 days retention
Semaphr - Free all-in-one kill switch for your mobile apps.
sentry.io - Sentry tracks app exceptions in real-time and has a small free plan. Free for 5k errors per month/ 1 user, unrestricted use if self-hosted
Whitespace - One-click bug reports straight in your browser. Free plan with unlimited recordings for personal use.

Analytics, Events and Statistics

amplitude.com - 1 million monthly events, up to 2 apps
AppFit - AppFit is a comprehensive analytics and product management tool designed to facilitate seamless, cross-platform management of analytics and product updates. Free plan includes 10,000 events per month, product journal and weekly insights.
Aptabase - Open Source, Privacy-Friendly, and Simple Analytics for Mobile and Desktop Apps. SDKs for Swift, Kotlin, React Native, Flutter, Electron, and many others. Free for up to 20,000 events per month.
Avo - Simplified analytics release workflow. Single-source-of-truth tracking plan, type-safe analytics tracking library, in-app debuggers, and data observability to catch all data issues before you release. Free for two workspace members and 1 hour data observability lookback.
Beampipe.io - Beampipe is simple, privacy-focussed web analytics. free for up to 5 domains & 10k monthly page views.
Census - Reverse ETL & Operational Analytics Platform. Sync 10 fields from your data warehouse to 60+ SaaS like Salesforce, Zendesk, or Amplitude.
Clicky - Website Analytics Platform. Free Plan for one website with 3000 views analytics.
counter.dev - Web analytics made simple and therefore privacy friendly. Free or pay what you want by donation.
DocBeacon - Secure document sharing with document tracking and engagement Analytics. Free plan supports up to 20 PDF documents (10 MB max), 10 contacts, and 2 shares per document with basic analytics for views downloads, time and engagement.
Dwh.dev - Data Cloud Observability Solution (Snowflake). Free for personal use.
Expensify - Expense reporting, free personal reporting approval workflow
getinsights.io - Privacy-focused, cookie-free analytics, free for up to 3k events/month.
Gizmo Analytics - Simple analytics for people managing lots of sites. Install manually or let Claude/Cursor do it for you. Free for up to 10k events/month.
GoatCounter - GoatCounter is an open-source web analytics platform available as a hosted service (free for non-commercial use) or self-hosted app. It aims to offer easy-to-use and meaningful privacy-friendly web analytics as an alternative to Google Analytics or Matomo. The free tier is for non-commercial use and includes unlimited sites, six months of data retention, and 100k pageviews/month.
Google Analytics
heap.io - Automatically captures every user action in iOS or web apps. Free for up to 10K monthly sessions.
Hightouch - Hightouch is a Reverse ETL platform that helps you sync customer data from your data warehouse to your CRM, marketing, and support tools. The free tier offers you one destination to sync data to.
Hotjar - Website Analytics and Reports . Free Plan allows 2000 pageviews/day. One hundred snapshots/day (max capacity: 300). Three snapshot heatmaps can be stored for 365 days. Unlimited Team Members. Also in App and standalone surveys, feedback widgets with screenshots. Free tier allows creating 3 surveys & 3 feedback widgets and collecting 20 responses per month.
LogSpot - Full unified web and product analytics platform, including embeddable analytics widgets and automated robots (slack, telegram, and webhooks). Free plan includes 10,000 events per month.
MetricsWave - Privacy-friendly Google Analytics alternative for developers. Free plan allows 1M pageviews per month without credit card required.
Mixpanel - 100,000 monthly tracked users, unlimited data history and seats, US or EU data residency
Moesif - API analytics for REST and GraphQL. (Free up to 500,000 API calls/mo)
PostHog - Full Product Analytics suite free for up to 1m tracked events per month. Also provides unlimited in-App Surveys with 250/month responses.
Repohistory - Beautiful dashboard for tracking GitHub repo traffic history longer than 14 days. Free Plan allows users to monitor traffic for a single repository.
Row Zero - Blazingly fast, connected spreadsheet. Connect directly to data databases, S3, and APIs. Import, analyze, graph, and share millions of rows instantly. Three free (forever) workbooks.
Rybbit - Open-source and cookieless alternative to Google Analytics that is 10x more intuitive. Free plans has 3,000 monthly events.
Seline - Seline is a simple & private website and product analytics. Cookieless, lightweight, independent. Free plan includes 3,000 events per month and provides access to all our features, such as the dashboard, user journeys, funnels, and more.
StatCounter - Website Viewer Analytics. Free plan for analytics of 500 most recent visitors.
Statsig - A robust platform for feature management, A/B testing, analytics, and more. Its generous free plan offers unlimited seats, flags, experiments, and dynamic configurations, supporting up to 1 million events per month.
TraceLog - AI Analytics for E-commerce. Ask questions in natural language about your analytics, get actionable recommendations and grow your revenue with AI-powered insights. Free for up to 10k events per month.
Trackingplan - Automatically detect digital analytics, marketing data and pixels issues, maintain up-to-date tracking plans, and foster seamless collaboration. Deploy it to your production environment with real traffic or add analytics coverage to your regression tests without writing code.
TrackWith Dicloud - Free lightweight privacy-focused alternative to Google Analytics. Unlimited pageviews, unlimited visitor, unlimited page heatmaps & goal tracking. Free for up to 3 domains and 600 session replay per domain.
Umami - Simple, fast, privacy-focused, open-source alternative to Google Analytics.
usabilityhub.com - Test designs and mockups on real people and track visitors. Free for one user, unlimited tests
Userbird - Google Analytics alternative with heatmaps, session recordings and revenue tracking.

Visitor Session Recording

FullStory.com - 1,000 sessions/month with one month data retention and three user seats. More information [here](https://help.fullstory.com/hc/en-us/articles/360020623354-FullStory-Free-Edition).
howuku.com - Track user interaction, engagement, and event. Free for up to 5,000 visits/month
inspectlet.com - 2,500 sessions/month free for one website
LogRocket.com - 1,000 sessions/month with 30-day retention, error tracking, live mode
Microsoft Clarity - Session recording completely free with "no traffic limits", no project limits, and no sampling
mouseflow.com - 500 sessions/month free for one website
OpenReplay.com - Open-source session replay with dev tools for bug reproduction, live session for real-time support, and product analytics suite. One thousand sessions/month with access to all features and 7-day retention.
Reactflow.com - Per site: 1,000 pages views/day, three heatmaps, three widgets, free bug tracking
smartlook.com - free packages for web and mobile apps (1500 sessions/month), three heatmaps, one funnel, 1-month data history
UXtweak.com - Record and watch how visitors use your website or app. Free unlimited time for small projects