SiteLetter is unclaimed —

SiteLetter

Branded client reports that prove your care plan is worth it.·siteletter.com

SiteLetter is a website monitoring and client-reporting service built for agencies that maintain client websites. It runs daily uptime checks, Lighthouse performance audits, AI-classified visual regression scans, SSL/domain expiry checks, and broken link/image checks on up to 15 auto-discovered pages per site, then rolls the results into a branded, white-label report sent to clients on a chosen schedule. It is platform-agnostic, covering WordPress, Webflow, Shopify, Squarespace, Framer, and custom builds, and runs entirely from external servers with no code installed on the monitored site.

What it's for

monitoring uptime for client websitesrunning daily Lighthouse performance auditsdetecting visual regressions and broken elements via AI classificationtracking SSL certificate and domain expirydetecting broken images and linkssending branded weekly/monthly client reports for website care plans

Features 15

2-year data/history retention
Agency-level alert rule and report schedule cascading to all clients/sites
Automatic page discovery from sitemap (top 15 pages by importance)
Branded, white-label client reports
Broken image and broken link detection across monitored pages
Configurable report cadence: weekly, bi-weekly, monthly, or quarterly
Daily AI-classified visual regression detection (dynamic vs intentional vs broken changes)
Daily Lighthouse audits (Performance, Accessibility, Best Practices, SEO)
Domain registration expiry monitoring
Email and Slack alerts via Incoming Webhooks
Free SSL/HTTPS checker tool
Multi-client management from a single dashboard with unlimited hostnames
Real-time uptime monitoring with cross-region confirmation (EU probe, US/Asia-Pacific confirmation)
SSL certificate expiry monitoring with configurable alert thresholds
Up to 200 team members per organization

At a glance

free trial

TypeWeb app

DeploymentCloud

PlatformsWeb

Fordigital agencies, web design agencies, web development agencies, marketing agencies maintaining client websites

CompanySiteLetter · 2026

Integrations

SlackStripe

Complianceself-reported

GDPR

Resources

Changelog

Pricing

Pricing scales linearly with number of client sites monitored (e.g., 5 sites = $25/mo total). A comparison table shows generic competitor plan types (Free/Starter/Pro/Enterprise) for reference.

SiteLetter$5/mo

Single flat plan, quantity-based on number of sites monitored; no tiers or add-ons.

Up to 15 monitored pages per site; up to 200 team members per organization

Launch pricing: $5/site/mo, will rise to $7/site/mo after the launch promo ends