FlatLyne vs SignalWatch

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

FlatLyne compared with SignalWatch
Detail	FlatLyne	SignalWatch
What it does	Cron job monitoring that alerts you when scheduled tasks don't run	Know when a public page changes
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Free plan: 10 checks, 1 project, 1 seat, 2 alert channels, 100 ping history per check, 1 minute minimum schedule. Pro: $12/month or $108/year (25% discount), 100 checks, 10 projects, 10 seats, unlimited alert channels, 1,000 ping history per check, 30 second minimum schedule, email support, 50 Whats	Free: $0 (3 URL monitors, checked every 15 minutes, 45-day history). Pro: $12/month or $79/year (50 URL monitors, checked every 5 minutes). Business: $29/month or $199/year (500 URL monitors, checked every 2 minutes). All plans include email, Slack, Discord, webhooks, and REST API.
Key features	HTTP ping-based job monitoring Support for cron expressions and interval schedules Multiple alert channels: email, Slack, PagerDuty, webhooks Exit code and log output capture Grace periods for late-running jobs Credential rotation on Pro and Business Encrypted ping URLs at rest WhatsApp and phone-call alerts on Pro Ping history retention: 100 pings on Free, 1,000 on Pro and Business	Text change detection with unified diffs Downtime and recovery alerts TLS certificate expiry monitoring CSS selector support for page sections Ignore regex and minimum-change thresholds Email, Slack, and Discord alerts Signed JSON webhooks REST API with OpenAPI documentation 45-day alert history Test alerts before deployment
What makes it different	Detects silent failures that traditional monitoring misses: jobs that never start or run but produce no errors Minimal setup: add one curl command to your existing jobs Secure credential model: each ping URL can only ping one check, stored encrypted, with SHA-256 hashed API keys Early pricing locked in for existing subscribers while new customers pay higher rates	No JavaScript rendering, only fetches visible text Free plan includes webhooks and API Flexible alert destinations: email, Slack, Discord, or custom webhooks Individual URL monitoring without site crawling Scheduled checks, not instant: free every 15 min, Pro every 5, Business every 2
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	9 no change since last check
Trust Flow (Majestic)	0	6
Citation Flow (Majestic)	18	24
Referring domains (Majestic)	3	13

5 details filled in for both companies.

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