Cross-platform monitoring
without the WP-only ceiling
ManageWP is the WordPress maintenance tool that GoDaddy bought in 2016. For pure-WordPress agencies on a tight budget, it still works out cheapest per site of the WordPress tools compared here once you are past roughly 80 sites. If you have any non-WordPress clients, or you want modern monitoring (Lighthouse on every monitored page, AI visual regression, branded reports without add-on math), read on.
Also evaluating WP Umbrella, Watchful, or Oh Dear? See those comparisons, or browse all alternatives.
Quick verdict
The decision depends on what is in your client portfolio and whether you want modern monitoring.
High-volume pure-WordPress agencies on tight budget
100% of your client sites are WordPress. You need maintenance (updates, backups, security) as the core of your retainer. The All-in-One bundle at $150/mo for up to 100 sites works out cheapest per site of the WordPress tools compared here once you are past roughly 80 sites.
You are comfortable with the add-on-pricing model and ManageWP's current release cadence. You do not need Lighthouse depth or day-over-day visual regression.
Mixed-stack agencies or modern-monitoring-seeking agencies
Your portfolio includes any non-WordPress sites (Webflow, Framer, Squarespace, Shopify, custom HTML). ManageWP cannot monitor those. SiteLetter covers everything in one tool, one bill, one report shape.
Or you want modern monitoring depth: Lighthouse on every monitored page with 4-score breakdown, AI day-over-day visual regression that filters cosmetic noise, branded scheduled client emails. All in the base $5/site price, no add-on math.
Where ManageWP genuinely wins
For pure-WordPress agencies, especially at high site volumes, ManageWP is genuinely the more cost-effective option with WP-native features SiteLetter does not have. Honest concession.
WordPress plugin/theme updates with one-click rollback
ManageWP's Safe Updates flow takes an automatic restore point before each update and reverts on failure. Run updates across your entire client portfolio with one click. SiteLetter does not update WordPress sites at all.
Encrypted incremental backups with 90-day retention
Cloud backup add-on at $2/site, or a $75/mo bundle covering up to 100 sites. Hourly/daily/weekly on Premium, monthly on Free. 90-day retention on both tiers. SiteLetter does not run backups; it monitors running sites externally.
Sucuri-powered security scanning
Free monthly Sucuri malware/blacklist scan + paid Automated Security Check add-on for scheduled scans + Vulnerability Protection at $2/site for real-time plugin/theme CVE alerts. SiteLetter does not ship security scanning.
All-in-One bundle for high-volume WordPress agencies
Their All-in-One bundle at $150/mo covers up to 100 WordPress sites with every add-on enabled (backups, security, performance, white-label, advanced reports, link monitor, SEO ranking). For pure-WP agencies above roughly 80 sites, the flat $150/mo is the cheapest per site of the WordPress tools compared here.
Free monthly check tier
ManageWP's Free tier handles unlimited sites with monthly cloud backup, security check, performance check, basic client reports, and the management dashboard. For agencies on a tight budget who can tolerate monthly (not real-time) checks, Free is a real option.
Native iOS and Android mobile apps
ManageWP ships mobile apps (after the original was pulled, the relaunch is scoped to mobile usability rather than feature parity). SiteLetter is browser-only today; alerts arrive by email and Slack.
Where SiteLetter is the right pick
For mixed-stack agencies (anyone whose portfolio is not 100% WordPress), or agencies that want modern monitoring shape and active product development, these are the things SiteLetter ships that ManageWP either does not have or gates behind add-on stacking.
Cross-platform monitoring (any website stack)
ManageWP requires the Worker plugin on each managed site - WordPress only. SiteLetter monitors any website externally regardless of stack: WordPress, Joomla, Drupal, Webflow, Framer, Squarespace, Shopify, custom HTML, Next.js. For mixed-stack agencies, that is the difference between one tool and two.
Lighthouse with the four-score breakdown, not PageSpeed on the homepage URL
ManageWP's Performance Check is a $1/site add-on that runs Google PageSpeed-style scoring on the site URL - a single number rather than the Lighthouse Performance, Accessibility, SEO, and Best Practices breakdown that non-technical clients recognise from elsewhere. SiteLetter runs the full Lighthouse on every monitored page across every site daily, plus Core Web Vitals (LCP and CLS), with DNS / TLS / CDN cache pre-warming before each audit so the scores are stable enough to ship as a trend in the monthly client report.
Continuous daily diffs, not just a Safe Updates check
ManageWP's Safe Updates runs a visual check during the plugin update flow - "did this update break the page?" - and rolls back if so. Useful for the update moment. It does not catch the breakage that lands between updates: a CDN config that drops product images, a stylesheet 404, a third-party script that pulls in new CSS. SiteLetter screenshots every monitored page every 24 hours regardless of whether anything deployed, then an AI classifier filters cosmetic noise (rotating banners, A/B test variants, cookie notices) so only genuine layout shifts trigger an alert.
One unified plan, not 9 add-ons
ManageWP's per-feature add-on model (Backups $2, Uptime $1, Security $1, Performance $1, White Label $1, Advanced Reports $1, SEO Ranking $1, Link Monitor $1, Vulnerability Protection $2 - all per site per month) means you decode the pricing matrix as you scale. SiteLetter is one product, 15 pages per site, every monitoring service included for $5/site flat.
Branded reports at the base price, not behind a $1/site add-on
ManageWP gates client-facing report features behind add-ons. Bought a la carte, Advanced Client Reports ($1/site) and White Label ($1/site) come to $60/mo across a 30-client portfolio; the All-in-One bundle at $150/mo includes both. Prices per managewp.com/pricing as of May 28, 2026. SiteLetter ships per-client logo, brand colour, and reply-to address on every scheduled report, plus an org-level toggle that strips the SiteLetter name from the report - all in the base $5/site.
Feature-by-feature comparison
The full picture, grouped by category. The "WordPress maintenance" group is all ManageWP; the "Per-page monitoring" group is all SiteLetter. For mixed-stack agencies the honest answer is often "both, used together."
| Feature | SiteLetter | ManageWP |
|---|---|---|
| Stack scope | ||
| WordPress sites | Yes (external monitoring) | Yes (deep integration via Worker plugin) |
| Joomla / Drupal sites | Yes (external monitoring) | No |
| Webflow / Framer / Squarespace / Shopify sites | Yes | No |
| Static HTML / Next.js / Astro sites | Yes | No |
| Cross-platform monitoring (any website stack) | Yes (per domain, 15 pages auto-discovered) | No (WordPress only) |
| Pricing model | ||
| Pricing unit | 1 site (up to 15 pages) | 1 WordPress install + per-feature add-ons |
| Cheapest commercial plan | $5/site (15 pages monitored, all features) | Free (unlimited sites, monthly checks); add-ons $1-$2/site each |
| All-features price | $5/site flat | All-in-One bundle $150/mo for 100 sites (every add-on enabled) |
| Free trial / Free tier | 14 days, 1 site | Permanent free tier (monthly checks, limited functionality) |
| Monitoring data retention | 2 years (730 days) of scan, screenshot, Lighthouse and report history while subscribed; raw uptime check rows kept 7 days (incidents retained); 730 days after a subscription lapses | Backups 90 days (both tiers); uptime/performance/security history not published |
| WordPress maintenance (ManageWP territory) | ||
| Plugin/theme updates with rollback | No | Yes (Safe Updates with auto-rollback) |
| Encrypted incremental backups | No | Yes (hourly/daily/weekly Premium, monthly Free; 90-day retention) |
| Sucuri-powered security scanning | No | Yes (free monthly + paid scheduled) |
| Vulnerability monitoring (plugin/theme CVE alerts) | No | Yes ($2/site add-on) |
| PHP error tracking | No | No (update failures only) |
| One-click admin SSO | No | Yes |
| Per-page monitoring (SiteLetter territory) | ||
| Per-page uptime | Yes, 15 pages per site | 1 URL per site (typically the homepage); paid $1/site add-on |
| Google Lighthouse audits (Performance / Accessibility / SEO / Best Practices) | Every monitored page, daily, with cache warmup | Google PageSpeed-style scoring on site URL (paid $1/site add-on); not Lighthouse 4-score breakdown |
| AI day-over-day visual regression with classification | Every monitored page, daily, classified | During-update visual check only (Safe Updates); not continuous monitoring |
| Broken asset detection across pages | Every monitored page, daily | Link Monitor add-on ($1/site) |
| Core Web Vitals (LCP, CLS) | Yes (via Lighthouse) | Not in product as labelled CWV metrics |
| Site-level services | ||
| SSL certificate expiry alerts | Yes | Not advertised as tracked feature |
| Domain expiry alerts | Yes | Not advertised as tracked feature |
| Sitemap auto-discovery | Yes (weekly sync) | N/A (one site at a time via Worker plugin) |
| Reports your clients read | ||
| Scheduled client-facing email report | Yes (weekly, bi-weekly, monthly, quarterly), included | Basic client reports on Free; Advanced Client Reports add-on ($1/site) adds PDF export + white-label. |
| Per-client branding | Yes, included | White Label add-on ($1/site) rebrands Worker plugin and client reports |
| Remove vendor branding from the report | Yes, included (report body and sender display name; emails still send from siteletter.com) | White Label add-on ($1/site) |
| Drag-and-drop report builder | Yes | No (templated reports) |
| Recipients view reports without a login | Yes (a branded email you forward; no account for the recipient) | PDF download + email delivery |
| Platform features | ||
| Alert channels | Email, Slack | Email, SMS, Slack (no webhook) |
| Public REST API | Not available | Internal API exists; no public developer portal documented today (long-standing user request) |
| Native mobile app | No | Yes (iOS, Android; mobile usability scope, not feature parity) |
Sources: managewp.com/pricing, features. Verified .
Cost at your portfolio size
Drag the slider to your client portfolio size. ManageWP columns assume every site is WordPress (the only kind they can monitor). "All-in-One" turns on every add-on (backups, security, performance, white-label, advanced reports); "Free" is monthly checks only with limited functionality. The bundle is the like-for-like column here because it matches SiteLetter's everything-included shape, but it is not ManageWP's cheapest route: buying add-ons singly at $1 to $2 per site costs less than $150 until a portfolio is large, so price the add-ons you actually need before comparing.
ManageWP pricing in USD per their public pricing page. All-in-One bundle $150/mo for up to 100 sites; per-site add-ons $1-$2 each (9 different add-ons available). Free tier $0 with limited functionality.
Reading these numbers honestly
ManageWP wins on per-site cost at high volume. Above 30 pure-WordPress sites, the All-in-One bundle's flat $150/mo for up to 100 sites starts to win on per-site cost, and the gap widens with volume (at exactly 30 sites both come to $150/mo). For pure-WP shops at scale, the math favours ManageWP before you weigh the bundled WordPress maintenance value (updates, rollback, backups, security).
SiteLetter wins on stack coverage and monitoring depth. ManageWP cannot monitor non-WordPress sites at all. Lighthouse with the 4-score breakdown and AI day-over-day visual regression are not in ManageWP at any tier. If either matters to your client deliverable, the cost gap is the wrong frame.
Cost at common portfolio sizes
For 100% WordPress portfolios in the 1-20 site range shown here, SiteLetter is cheaper at low volume; the ManageWP bundle pulls ahead as you approach its 100-site capacity. At pure WP volumes above 30 sites, ManageWP bundle wins on raw dollars.
| WordPress sites | SiteLetter | ManageWP All-in-One bundle | ManageWP Free |
|---|---|---|---|
| 5 | $25/mo | $150/mo | $0/mo |
| 10 | $50/mo | $150/mo | $0/mo |
| 20 | $100/mo | $150/mo | $0/mo |
Source: managewp.com/pricing, verified .
When to pick which
Three honest scenarios.
High-volume pure-WordPress shop
50-100 WordPress sites, retainer is mostly maintenance and backups, budget is the binding constraint. ManageWP All-in-One bundle at $150/mo for up to 100 sites is hard to beat per site toward the top of that range; below roughly 80 sites, per-install tools like Watchful and WP Umbrella come out cheaper.
Mixed-stack or modern-monitoring agency
Any non-WordPress sites in your portfolio, or you want Lighthouse depth, AI visual regression, and branded reports without add-on math. SiteLetter at $5/site is the better fit, with active product development on the AI monitoring side.
WP maintenance + cross-platform monitoring
WordPress maintenance is core to your retainer but you also have non-WP clients or want deeper monitoring. ManageWP (or another WordPress maintenance tool such as MalCare or MainWP) for the WP maintenance side, SiteLetter for cross-platform monitoring + branded client reports. They do overlap: uptime, performance scoring, broken-link checks, and client reports appear on both sides, as paid ManageWP add-ons. The difference is shape rather than absence. ManageWP works from inside WordPress; SiteLetter watches the running URL from outside and goes deeper on each page.
SiteLetter vs ManageWP: FAQ
Above roughly 30 sites, ManageWP's All-in-One bundle at $150/mo (up to 100 sites) works out cheaper per site than SiteLetter; below that, SiteLetter is the cheaper of the two. They ship WordPress-native features SiteLetter does not have: plugin/theme updates with rollback, encrypted backups, Sucuri-powered security scanning. If you want a cheaper pure-WP maintenance tool and you are comfortable with their current release cadence, ManageWP works.
ManageWP requires installing the Worker plugin on each managed site, which means it only works on WordPress installs. If your client portfolio includes Webflow sites, Framer pages, Squarespace stores, Shopify storefronts, custom HTML/CSS sites, Next.js apps, or anything that is not a WordPress install, ManageWP cannot monitor them. SiteLetter is platform-agnostic: you add a domain, SiteLetter discovers up to 15 pages of it and monitors them externally regardless of the stack underneath. For agencies that take on whatever client wants to hire them, that is the difference between one tool and two.
No, not as a Lighthouse-branded audit with the four-score breakdown (Performance / Accessibility / SEO / Best Practices). Their "Automated Performance Check" add-on at $1/site runs Google PageSpeed-style scoring. SiteLetter runs full Lighthouse on every monitored page on every site daily with DNS/TLS/CDN cache warmup, and the four-score breakdown ships in the client report, and Core Web Vitals (LCP, INP, CLS) are tracked per page in the dashboard.
No. ManageWP's Safe Updates flow takes an automatic restore point before each plugin/theme update and rolls back on failure - that is during-update protection, not continuous day-over-day monitoring of every monitored page for visual drift. SiteLetter takes a daily screenshot of every monitored page, diffs it against the previous day, and uses AI to classify each diff as noise (rotating banners), intentional update (logged in the weekly report), or real breakage (missing images, layout collapse, emailed after the next daily check).
For WordPress agencies: plugin and theme updates with one-click rollback (Safe Updates), encrypted incremental backups with 90-day retention, Sucuri-powered security scanning, Vulnerability Protection ($2/site for real-time plugin/theme CVE alerts), Link Monitor, SEO Ranking, Advanced Client Reports as a paid add-on. Plus the original ManageWP dashboard for managing many WordPress installs from one place. SiteLetter does not run WordPress maintenance, backups, or security scanning - SiteLetter monitors running sites externally.
Cross-platform monitoring: any website stack including Webflow, Framer, Squarespace, Shopify, custom builds, alongside WordPress (ManageWP requires the Worker plugin and only works on WordPress installs). Per-page Google Lighthouse on every monitored page daily with DNS/TLS/CDN cache warmup (ManageWP has Performance Check as a paid add-on but no Lighthouse four-score breakdown). AI day-over-day visual regression that classifies each diff big enough to matter as noise / intentional / breakage (ManageWP has during-update visual safety check, not continuous day-over-day diffing). Branded scheduled per-client email reports with your logo, colours, intro copy, reply-to address, and an org-level toggle that removes the SiteLetter name (the sending address is still ours), all included in the base $5/site (ManageWP gates branded reports + white-label behind paid add-ons stacked on top of the base price).
No, not for pure-WordPress shops. ManageWP's All-in-One bundle at $150/mo covers up to 100 sites with every add-on enabled, vs SiteLetter at $5/site = $500/mo for 100 sites. The bundle math heavily favours ManageWP at high volume. SiteLetter's pitch is not cheaper-per-site: it is "fewer tools for mixed-stack work plus an agency-deliverable client report shape your client opens." If both are true for your agency, the per-site math works out; if you are 100% WordPress, ManageWP wins on cost.
Yes, and several mixed-stack agencies do exactly this. ManageWP for the WordPress maintenance side (plugin updates, backups, security scanning, Sucuri checks) on their WP installs. SiteLetter for the cross-platform monitoring (uptime, Lighthouse, AI visual regression, broken-asset detection) plus a branded weekly client email report for every site in your portfolio (one report per site). The two products do not overlap meaningfully: ManageWP works inside WordPress; SiteLetter monitors the running URL externally.
Yes if you are moving toward mixed-stack work or you want modern monitoring shape, but read this carefully: SiteLetter does not replace WordPress maintenance. SiteLetter does not handle plugin updates, backups, rollback, or PHP-error tracking. If you are leaving ManageWP for SiteLetter without keeping another WordPress maintenance tool, your clients lose update management and backups. The honest move for mixed-stack agencies is to keep ManageWP (or another WordPress maintenance tool such as MalCare or MainWP) on WordPress sites and add SiteLetter for the cross-platform monitoring and reporting. The 14-day SiteLetter trial includes one site so you can validate the cross-platform experience on one non-WP client site before extending.
Still have questions? Contact us
Comparison based on publicly available ManageWP pricing and feature documentation, last verified . ManageWP is a product of GoDaddy and a trademark of its respective owner, used here for identification and comparison purposes only. SiteLetter is independent and not affiliated with, sponsored by, or endorsed by ManageWP or GoDaddy. For the most current ManageWP pricing and feature information, see managewp.com.
Set up your care-plan reporting once.
Close the tab.
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.