No moat. Still in business.

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Shows Rails teams which requests are slow, flags N+1 queries and SQL timings, and tracks errors in one dashboard.

Free plan · Uptime and monitoring · Developers

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Error tracking and product analytics that works with your current Sentry SDK and lets coding agents read issues to fix them.

Free plan · Uptime and monitoring · Developers

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Web and desktop interface for browsing, troubleshooting, monitoring and governing Apache Kafka data streams.

Since 2023

Free plan · Uptime and monitoring · Developers

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Schedules timed tasks, watches that your jobs and sites stay up, and checks email addresses, for apps on serverless hosts and AI agents.

Free plan · Uptime and monitoring · Developers

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An observability backend on ClickHouse that takes logs, metrics, traces and profiles and lets teams query them in Grafana.

Free plan · Uptime and monitoring · Developers

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Watches the status pages of thousands of outside services and alerts you when the ones you depend on go down.

Since 2024

Free plan · Uptime and monitoring · Developers

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Dashboard for email sent through Amazon SES showing bounces, deliveries, complaints, opens and clicks, run yourself or hosted.

Free · Transactional email · Developers

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Self-hosted on-call paging that pulls commits, logs and metrics when an alert fires and explains the likely cause.

Free · Uptime and monitoring · Developers

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An AI on-call helper that looks through logs, metrics and code to find why production broke and suggest fixes.

Since 2026

Free plan · Uptime and monitoring · Developers

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A free status page you host yourself to tell customers about outages, incidents and planned maintenance.

Free · Uptime and monitoring · Software companies

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Traces AI coding agent runs, spots where they fail and enforces rules that stop repeat failures as they happen.

Free plan · Uptime and monitoring · Developers

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Send a number to an HTTP endpoint and get a chart of it over time, for small apps and side projects.

Since 2025

Uptime and monitoring · Developers

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Sends you an email when a cron job, backup or background worker misses its expected check-in or reports failure.

Uptime and monitoring · Developers

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An AI agent that looks into production alerts, finds the likely root cause and prepares fixes for engineering teams.

Free plan · Uptime and monitoring · Developers

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Watches PHP apps in production for errors and slow code, and passes that data to your AI coding agent to help fix problems.

Free plan · Uptime and monitoring · Developers

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Runs incidents from alert to postmortem for engineering teams, with on-call rotas, escalations and status pages included.

Free plan · Uptime and monitoring · Developers

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Watches web pages for you and sends an alert when content, prices or stock levels change.

Subscription · Uptime and monitoring

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Checks lists of up to 100,000 URLs in the cloud, retries links that block bots, and can run scheduled broken link checks.

Subscription · Uptime and monitoring

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Watches AI agents in production, groups recurring failures and alerts you so a coding agent can fix them.

Free plan · Uptime and monitoring · Developers

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Runs scheduled SQL checks on Postgres and ClickHouse and alerts your team when data goes missing, stale or wrong.

Free plan · Uptime and monitoring · Developers

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Watches web pages, news and social sites for topics you pick and alerts you with a summary when something changes.

Free plan · Uptime and monitoring · Individuals and families

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Posts a Slack alert when Apple or Google approves or rejects your app, or a TestFlight build is ready.

Since 2023

Subscription · Uptime and monitoring · Developers

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Platform for AI teams to trace, simulate and evaluate their LLM agents and keep track of model spend.

Uptime and monitoring · Developers

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An iPhone terminal with persistent SSH sessions, server alerts and live views of coding agents running on your hosts.

Uptime and monitoring · Developers

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A Mac menu bar app that tests the MCP servers your AI agents rely on and flags ones that are broken, slow or need sign-in.

Free · Uptime and monitoring · Developers

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Tracing and monitoring for AI agents written in Elixir, showing which model or tool call failed, slowed down or cost too much.

Free plan · Uptime and monitoring · Developers

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A free status page and uptime monitor you run in Docker, with incident updates, maintenance plans and subscriber notices.

Free · Uptime and monitoring · Developers

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Records each step of an AI agent's run so developers can spot slow calls, errors and token costs.

Free plan · Uptime and monitoring · Developers

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WordPress plugin that times your server's processor, RAM, database, disk and network to rate your host, on demand or on a schedule.

Uptime and monitoring

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Ties logs and traces from iOS and Android apps to backend services so app teams can trace a user problem to its cause.

Uptime and monitoring · Developers

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Monitors website speed using real visitor data, Chrome field data and scheduled page tests.

Since 2017

Free trial · Website analytics · Online sellers

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Dashboard for agencies and freelancers to update, back up, monitor and report on many WordPress client sites at once.

Subscription · Uptime and monitoring · Agencies

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Watches dead letter queues in RabbitMQ and Kafka, alerts on stuck consumers or spikes, and lets engineers replay failed messages.

Uptime and monitoring · Developers

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Finds wasteful logs and telemetry in your source code and opens pull requests to cut observability bills for engineering teams.

Uptime and monitoring · Developers

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Log monitor that runs in your own cloud, spots incidents and sends alerts with likely causes to Slack or PagerDuty.

Since 2026

Free plan · Uptime and monitoring · Developers

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Traces AI agent runs in production, flags silent failures and lets teams test changes in simulation before release.

Since 2025

Free plan · Uptime and monitoring · Developers

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A proxy that watches AI agent calls, spots runaway loops and blocks requests once a spending limit is hit.

Free plan · Uptime and monitoring · Developers

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Checks your websites, SSL, ports and cron jobs, confirms outages from other regions and runs status pages on your domain.

Since 2024

Free plan · Uptime and monitoring · Online sellers

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Monitors AI agents and LLM apps running live for engineering teams, works out why they break and proposes prompt fixes.

Since 2026

Free · Uptime and monitoring · Developers

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Watches your Supabase project for stale, changed or wrong data, explains the cause and suggests a fix.

Uptime and monitoring · Developers

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Watches your AI agent's real traffic, finds where it fails customers and opens tested pull requests with fixes.

Since 2026

Subscription · Uptime and monitoring · Developers

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Mac app that pulls builds, deploys, pull requests and errors into one small inbox and hands fixes to a coding agent.

Free plan · Uptime and monitoring · Developers

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Monitors websites and Linux servers, sends alerts by email, SMS or call, and hosts branded status pages on your domain.

Free plan · Uptime and monitoring · Developers

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Catches errors in live software, shows session replays and deploys, and can open a tested pull request with a fix for you to review.

Free plan · Uptime and monitoring · Developers

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Self-hosted tool that uses AI to look into each Kubernetes alert and sends a root cause report to Slack.

Uptime and monitoring · Developers

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Sends messages from your scripts, servers or webhooks straight to the Pocket Alert app on your iPhone or Android phone.

Free plan · Uptime and monitoring · Developers

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Tracks security certificates across cloud accounts and public sites so operations teams spot expiring or broken renewals early.

Free plan · Uptime and monitoring · Developers

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Reads the SSL certificate each of your hosts serves and emails warnings before it expires or breaks, for teams and agencies.

Free plan · Uptime and monitoring · Agencies