No moat. Still in business.

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Generates searchable API docs from C++ code and Markdown pages, with optional hosting, for C++ teams.

Since 2021

Developer tools · Developers

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Watches your sites, certificates, DNS records and scheduled tasks around the clock and tells your team as soon as something fails.

Since 2024Updated 4 months ago

Subscription · Uptime and monitoring · Developers

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Send JSON events from your app with one request, then chart, query with SQL, set alerts and embed dashboards.

Since 2022

Free plan · Website analytics · Developers

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Gives your OpenClaw AI agent a phone line so it can call you with alerts and briefings when your rules trigger.

Since 2026

Subscription · Automation and integrations · Individuals and families

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Falco based Kubernetes security tool that spots attacks inside your own cluster, sends no telemetry and is paid for once.

Since 2026

One-off payment · Security and passwords · Developers

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Point any domain at any URL with automatic HTTPS, path rules and hit analytics, no server to run.

Free plan · Website builders

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A menubar app that shows the numbers you track from any API, with charts and threshold alerts.

Data and spreadsheets · Individuals and families

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Tracks machine learning experiments, metrics and model versions for ML teams, with an API compatible with Weights and Biases.

Free trial · Developer tools · Developers

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Hosted RabbitMQ and LavinMQ message queues that are monitored and maintained for you on the major clouds.

Developer tools · Developers

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Collects traces, metrics and logs through OpenTelemetry for engineering teams, hosted or on your own servers.

Since 2022

Free trial · 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.

Since 2024

Free plan · Uptime and monitoring · Developers

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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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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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Lets teams building AI agents run simulations, evaluate outputs and trace failures in production.

Free plan · Developer tools · Developers

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Tracks cost, calls and errors in AI apps and agents through OpenTelemetry, either self-hosted or on their managed cloud.

Since 2026

Subscription · 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 MySQL, PHP-FPM, Varnish and NGINX servers in one dashboard with alerts, as a swap in replacement for NGINX Amplify.

Since 2026

Free plan · Uptime and monitoring · Developers

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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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Server monitoring for teams with cloud or dedicated machines. Install with one command, and get alerts only when a person needs to act.

Free plan · Uptime and monitoring · Developers

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Alerts you by email, Slack or a ticket when a cron job, backup or pipeline misses its expected check-in.

Since 2026

Free plan · Uptime and monitoring · Developers

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Checks your site is up, sends alerts to Telegram or a webhook, and adds logs, metrics and a public status page.

Since 2025

Free plan · Uptime and monitoring · Developers

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Tracing and anomaly alerts for AI agent pipelines, so developers catch failures they were not watching for.

Since 2026

Free plan · Uptime and monitoring · Developers

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Tracks the AI agents a company runs in production, showing their costs, flagging leaked personal data and enforcing usage rules.

Since 2026

Uptime and monitoring · Developers

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Collects traces, logs, metrics and session replays from OpenTelemetry for $39 a month, with EU hosting or self-hosting.

Subscription · Uptime and monitoring · Developers

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Observability for logs and traces that answers questions in Slack and drafts fix pull requests when alerts fire.

Since 2026

Free plan · Uptime and monitoring · Developers

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Stores and queries logs, metrics and traces on object storage at low cost, as a managed cloud or on your own servers.

Since 2026

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.

Since 2025

Free plan · Uptime and monitoring · Individuals and families

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

Since 2026

Free plan · Uptime and monitoring · Developers

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Lets developers record counters and revenue figures in their own database, then chart them and set alerts in a hosted dashboard.

Since 2026

Subscription · Developer tools · Developers

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

Since 2026

Free plan · Uptime and monitoring · Developers

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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.

Since 2025

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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Deploys apps from a GitHub repo onto a server in your own cloud account, with HTTPS and redeploys on each push.

Since 2026

Free plan · Developer tools · Developers

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Send app events with one HTTP call, then search them and get them delivered to Slack, Discord, Telegram or webhooks.

Since 2026

Free plan · Developer tools · Developers

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Tracks API traffic, errors and response times, logs requests and sends alerts, set up with a few lines of code.

Since 2025

Free trial · 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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Gateway and dashboard that routes LLM requests and logs them so teams can debug and analyse their AI apps.

Free trial · Uptime and monitoring · Developers

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Error tracking that works with Sentry client SDKs, plus performance and uptime checks, hosted for you or run on your server.

Free plan · Uptime and monitoring · Developers

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Catches production errors with stack traces and local variables, a cheaper Sentry-compatible option you can host yourself.

Free · Uptime and monitoring · Developers

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Send push alerts to your phone or desktop from any script or app with a simple HTTP request, hosted or self-hosted.

Since 2022

Free plan · Uptime and monitoring · Individuals and families

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Gathers metrics, logs and traces using eBPF and explains why production incidents happened, for SRE and DevOps teams.

Since 2025

Subscription · Uptime and monitoring · Developers

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Sets up and manages your own cloud server to deploy Django apps, with a dashboard, CLI and API.

Since 2021

Free plan · Developer tools · Developers

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Open-source observability that gathers metrics, logs and traces with eBPF and points DevOps teams to the root cause of outages.

Since 2024

Uptime and monitoring · Developers