Who is Cassie.fm for?

Cassie.fm is a B2B product built for developers.

Does Cassie.fm have a free plan?

Yes — there is a free tier, with paid plans for advanced use.

What platforms does Cassie.fm run on?

Cassie.fm runs on the web and API.

Is Cassie.fm still maintained?

Unverified. Cassie.fm has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Cassie.fm?

Similar projects tracked by PulseGate include constraintloop, trajectory-judge, and COHESION.

Does Cassie.fm have an API or integrations?

Yes — Cassie.fm exposes a public API.

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Cassie.fm

cassie.fmLLM eval & observability

Cassie.fm is a web-based uptime monitoring platform designed for developers. It offers real-time alerts, customizable status pages, and a status API to help teams track service health and reliability. The platform features a generous free tier and pay-as-you-go pricing.

FreemiumWebCloud-managedAPI

Visit cassie.fm

Overview

6 features

In the LLM eval & observability space, Cassie.fm takes a focused approach. Ensuring developers can monitor website uptime and receive real-time alerts to maintain service reliability. It is built as a B2B product for developers. Cassie.fm follows a freemium model. It ships for the web and API.

Cassie.fm first shipped in 2024. Key capabilities include uptime monitoring, real-time alerts, and status pages. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Uptime monitoring
Real-time alerts
Status pages
Status API
Free tier
Pay-as-you-go pricing

Built with & integrations

Framework

SvelteKit

Hosting

Cloudflare

Connectors

API

Runs on

BrowserCloud-managedAPI-only

Detected from

SvelteKit: data-sveltekit- in the HTML · /_app/immutable/ in the HTML
Cloudflare: cf-ray header · cf-cache-status header

Trust & compliance

Verified signals

HTTPSTerms of ServiceFree tier

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed28 Jun · 19:01 UTC
Listing verified against its public source
Source: PulseGate · Open

Frequently asked questions about Cassie.fm

What is Cassie.fm?: Ensuring developers can monitor website uptime and receive real-time alerts to maintain service reliability. It is catalogued under LLM eval & observability on PulseGate.
Who is Cassie.fm for?: Cassie.fm is a B2B product built for developers.
Does Cassie.fm have a free plan?: Yes — there is a free tier, with paid plans for advanced use.
What platforms does Cassie.fm run on?: Cassie.fm runs on the web and API.
Is Cassie.fm still maintained?: Unverified. Cassie.fm has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Cassie.fm?: Similar projects tracked by PulseGate include constraintloop, trajectory-judge, and COHESION.constraintloop trajectory-judge COHESION
How long has Cassie.fm been around?: Cassie.fm first shipped in 2024.
Does Cassie.fm have an API or integrations?: Yes — Cassie.fm exposes a public API.

At a glance

Pricing: Freemium · pricing page detected · free tier
Platforms: Web
Languages: English
Built for: developers
Model: B2B
Solves: Ensuring developers can monitor website uptime and receive real-time alerts to maintain service reliability.

Live coverage

Identity confidence: Medium · 72.8
Indexed: 28 Jun 2026
Lifecycle: Unverified
Last seen: 28 Jun 2026

Identity audit (12)

Slug: cassie-fm-uptime-monitoring-with-real-time-alerts-status-pag-cassie-fm
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 28 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 28 Jun 2026
Canonical URL: https://cassie.fm/monitors

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