The care-plan tools
agencies weigh, plotted
The monitoring tools agencies most often weigh against SiteLetter, mapped by who they are built for and what they cover. The honest answer to "which tool should I use" depends on your stack and your client deliverables. Below: where each one sits, what each does best, and where SiteLetter is shaped differently.
The monitoring landscape
Horizontal axis: count of agency-fit features (branded reports, agency branding, WP maintenance, status pages, public API, SSO, mobile app, rich alert channels...). Vertical axis: count of monitoring services. The price after each name is the rung that vendor's own pricing page publishes, the one nearest 10 client sites at 15 monitored pages each ($50/mo on SiteLetter). The rungs are not like for like, so each card below spells out what its rung covers. Click any dot for the head-to-head comparison.
Position computed from feature counts · Price = each vendor's own published rung, with what that rung covers spelled out on the cards below · Hover a dot for its full feature breakdown.
Compare by category
For each tool: what they are, what they do best, and where SiteLetter is shaped differently. Both sides equal billing.
Each card shows the price that tool's own vendor publishes, for the rung nearest 10 client sites at 15 monitored pages each ($50/mo on SiteLetter), in the currency that vendor prints. No competitor price here is re-cut into a bundle they do not sell, so every figure is one you can find on their own pricing page.
That means the rungs are not like for like, so each card also says what its rung covers: some carry far more than 10 sites for the same money, some cap below it and quote the rest on request. Two vendors price in euros, and their figures are printed the way they publish them, with no conversion applied.
WordPress maintenance tools
For agencies whose entire client portfolio is WordPress (or WP + Joomla).
ManageWP
Cheapest per-site WordPress maintenance at large portfolios. Owned by GoDaddy since 2016.
All-in-One bundle
Flat for up to 100 WordPress installs, so it carries these 10 sites and 90 more for the same money, and nothing that is not WordPress. No Lighthouse four-score breakdown and no day-over-day visual regression at any rung.
The bundle switches on every add-on at once. Bought singly those add-ons run $1 to $2 per site per month each, and their free tier is $0 with monthly checks only.
Bulk plugin and theme updates with rollback. Cheapest per-site bundle in the WP segment once a portfolio passes roughly 80 sites, up to the bundle cap of 100.
Cross-platform monitoring without the WP-only ceiling.
WP Umbrella
Modern WordPress maintenance with light monitoring layered on top.
Base plan, $2.19 per install
Their base plan covers WordPress plugin and theme updates, uptime and daily backups on all 10 installs. Matching the checks on this page needs their security add-on and Hourly Backups on top, listed at $2 and $2.49 per install, which takes 10 installs to $66.80.
WordPress only. Per-page Lighthouse and day-over-day visual regression are not on their published pricing page as of August 2026. The base rate is EUR 1.99, published alongside the $2.19 figure by WP Umbrella.
WordPress updates with rollback, daily encrypted backups (50-day retention), plus optional Patchstack security and hourly backups as paid add-ons.
Lighthouse depth, AI visual diff, and Webflow/Shopify/Framer/custom coverage.
Watchful
WordPress and Joomla maintenance with reports. Decade-plus track record.
Premium, $1.83 per install
Covers all 10 installs at their full feature set, but only WordPress and Joomla ones: maintenance, uptime and security scans. No Lighthouse, no day-over-day visual regression, and domain expiry alerts are not in the product.
Billed per install rather than by tier, so there is no cap to run into. Their free tier is $0 with reduced limits.
WordPress + Joomla maintenance combined, security scanning, generous free tier. Lower per-site price.
Cross-platform monitoring beyond WP and Joomla, plus per-page Lighthouse.
Uptime-primary monitoring
Uptime-first pricing and check types. Scope varies widely: StatusCake is broad, Pingdom is narrow.
UptimeRobot
Mass-market uptime checker with the best-known free tier.
Scale plan, 200 monitors, annual rate
200 monitors carries all 150 page checks plus SSL and domain expiry across the 10 sites. No Lighthouse, no scheduled branded client report, and their page-change detection is a separate free tool rather than a monitor type inside the plan.
Monthly billing on the same rung is €77. Their published ladder stops at €149 for 500 monitors, above which they quote Enterprise on request. Homepage-only monitoring on these sites sits inside their free tier, which carries 50 monitors.
Free tier (50 monitors, commercial use allowed), native iOS/Android app, 30-second checks from the Team plan up, 15-second on Scale, 15+ alert channels.
Lighthouse, visual regression, and branded client reports on top of uptime.
Pingdom
SolarWinds-owned uptime + RUM. Page speed uses YSlow.
Synthetic Monitoring, 200-check tier
Carries one uptime check per monitored page across the 10 sites. Their page-speed check uses YSlow methodology rather than Lighthouse, there is no day-over-day visual regression, and no per-client branded report.
Homepage-only monitoring on these sites is $17/mo on the same ladder. Real User Monitoring is a separate Pingdom product on its own meter and is not counted here.
Real User Monitoring (actual visitor performance data), 100+ probe locations, multi-step transaction checks, large-vendor continuity.
Page speed scored with Google Lighthouse, not YSlow.
StatusCake
Per-monitor billing in separate uptime / page-speed / SSL / domain pools.
Business, their highest published tier, annual rate, ex. VAT
Its page-speed pool caps at 30 monitors: 2 of these 10 sites at 15 pages each. Covering all 10 moves to Enterprise, which StatusCake quotes on request rather than listing.
No Lighthouse four-score breakdown and no day-over-day visual regression at any tier. Homepage-only uptime on these sites sits inside their free tier. EUR excluding VAT is what they publish, so no conversion is applied here.
43 probe locations + installed-agent server monitoring (RAM/CPU/disk), broader protocol check types (TCP, DNS, SMTP, SSH).
One pool, one flat fee per site. All checks bundled.
Developer-focused tools
Built for SRE teams, on-call rotations, monitoring-as-code workflows, or self-hosted stacks.
Hyperping
Status-page-first uptime for dev teams. White-label gated to Business tier.
Business, 1,000 monitors, annual rate
150 monitors lands on Business because the rung below it, Pro at $74/mo, covers 100. Business carries far more than these 10 sites need, and it is also where their white-label and on-call rotations begin. No Lighthouse and no day-over-day visual regression at any tier.
Monthly billing on the same rung is $299. Essentials is $24/mo for 50 monitors and their free tier covers 20, which is homepage-only uptime on 20 sites. Hyperping shows these figures in the visitor's own currency, and the numerals are the same in euros.
Status pages on every tier (including free), on-call rotations with escalation, Playwright browser checks, public REST API.
Branded client reports with the SiteLetter name stripped, included, no Business-tier upcharge.
Uptime Kuma
Self-hosted open-source uptime. MIT-licensed, GitHub-starred.
MIT licensed, self-hosted
The software is free at any number of sites, so there is no rung to cap out. The spend is yours instead: a VPS at roughly $5 to $20/mo, plus my estimate of 1 to 3 hours a month for patching, backups and watching the watcher. No Lighthouse, no visual regression, no scheduled client reports.
That $0 is the price the project itself publishes. Any hosting or time figure beside it is my estimate, not theirs.
Free MIT source, 10+ monitor types, 90+ alert channels, full data control, no vendor failure mode.
Managed monitoring without the VPS, the Docker, or the cert renewal.
Checkly
Monitoring-as-code in TypeScript. Playwright-native browser checks.
Team, their highest published tier, annual rate
Team covers 75 monitors: 5 of these 10 sites at 15 pages each. All 10 moves to Enterprise, which Checkly quotes on request rather than listing.
Starter is $24/mo for 50 monitors, Hobby is free for 10. Visual comparison ships as Playwright snapshot tests from Team up, a CI baseline rather than a day-over-day diff, and Lighthouse is not first-class.
checkly-cli + Terraform provider, Git/CI workflow, 22 public probe locations plus private locations via self-hosted agent.
Click, not code. Monitor client sites without writing TypeScript.
Better Stack
On-call, logs, traces, incident management for DevOps teams.
Additional 50 monitors, their published block rate
Better Stack prices monitors in blocks rather than tiers, so 150 checks is the free 10 plus three of these blocks, which works out at $75/mo. That is uptime billing only: responder seats, extra status pages, Playwright minutes and log bundles meter separately, and status-page white-label is $250 per page per month on top. No Lighthouse, no day-over-day visual regression, no scheduled branded client report.
Annual billing takes the block to $21/mo, so the same 150 checks land at $63/mo. Homepage-only monitoring on these 10 sites fits inside the free 10 monitors.
On-call schedules with escalation, voice and SMS alerts, logs + traces + session replay bundled, 30+ probe locations.
Agency-shaped monitoring, not on-call dev tooling.
Set up your care-plan reporting once.
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SiteLetter is the kind of tool you forget you're using, until your client thanks you for the report you didn't write.
- ✓ 2-minute setup. Add a URL. SiteLetter auto-discovers pages, starts monitoring, schedules reports. You pick your alert rules and confirm each client address once.
- ✓ No scripts to install. SiteLetter monitors from the outside, like a real visitor.
- ✓ Cancel anytime. No credit card to start, no contract.