Greenbar vs StackFirefly

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

Greenbar compared with StackFirefly
Detail	Greenbar	StackFirefly
What it does	Uptime monitoring and client-branded status pages for freelancers and small agencies	WordPress reliability monitoring that detects silent failures beyond uptime
Stage	Not given	Not given
Founded	Not given	Not given
Based in	CA	Not given
Pricing model	Freemium	Freemium
Pricing	Free: $0/month, 1 client status page, 5 monitors, 5-minute checks, email alerts, 7-day check history. Freelancer: $15/month or $150/year (2 months free), 10 client status pages, 50 monitors, 1-minute checks, email/Slack/webhook alerts, 90-day check history. Agency: $35/month or $350/year (2 months f	Free (1 site, 7-day history, 5-minute checks, no AI). Trial: 15 days with up to 3 sites and Pro-level features. Planned launch prices: Starter €15/month (3 sites), Pro €39/month (10 sites), Agency €89/month (25 sites), Agency Plus €159/month (50 sites), Custom (51+ sites).
Key features	HTTP(S) and keyword checks with automatic incident detection Email, Slack, and signed webhook alerts Client-branded status pages at custom addresses Client logo and brand colour customization on paid plans Multiple team logins on Agency plan 90-day check history on paid plans Option to hide Greenbar branding on paid plans	Website connectivity checks (REST/AJAX requests and internal connections) Background job and scheduled task monitoring Test email delivery verification Error tracking with file locations and traces Security vulnerability detection for plugins and themes Page speed tracking with mobile PageSpeed tests AI-assisted issue diagnosis and explanation WordPress Multisite monitoring MCP server integration with ChatGPT, Claude, and Codex Issue grouping and recovery tracking
What makes it different	Free plan with $100 starting credit, no card required Can manage up to 30 client sites on one plan Monitors automatically pause rather than delete when downgrading Single blip won't trigger false alerts	Detects silent failures beyond uptime, including blocked connections and background job failures Read-only monitoring that never automatically changes your site Plain-language explanations with technical evidence available Monitoring excludes sensitive data like passwords, cookies, and customer orders
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	0	6
Referring domains (Majestic)	0	3

5 details filled in for both companies.

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