The client report, not the ops console.
The Oh Dear alternative for agencies.
Oh Dear (ohdear.app) audits one URL per monitor, daily, on a simulated mobile device, and visual change detection is not on its published feature list (checked August 21, 2026). SiteLetter captures up to 15 pages of every client site every day on two devices, compares each against the last good capture, normally yesterday's, scores it with Lighthouse, checks its links and images, and puts the result in a white-label report built to be forwarded, with a drag-and-drop builder over the sections.
Also evaluating UptimeRobot or StatusCake? See those comparisons, or browse all alternatives.
Quick verdict
Both tools are good. The decision comes down to who you are and what you need to deliver.
Tech teams, DevOps, and single-site owners
Developers and DevOps teams who run their own infrastructure (cron jobs, app health, DNS records, ping, TCP, multi-region probes), or anyone with one or two sites where homepage uptime + SSL is enough.
Oh Dear's entry tier is €15/mo for 2 monitors, and one monitor is a complete answer for a site whose whole job is "tell me when it goes down": uptime every minute, SSL and domain expiry, and a broken-link crawl that reaches deeper than SiteLetter's (up to 5,000 pages from one URL). That is an ops console for developers, and it is a good one.
Agencies monitoring client sites
Your monthly client deliverable depends on more than the homepage being up. It covers Lighthouse, visual regression and broken-asset checks across the pages a client's customers actually land on: the contact form, the pricing page, the service pages, the top blog posts. Uptime is the separate service, and it watches the homepage every minute. A second region re-checks any failure before an alert fires, and a third breaks a tie when the two disagree. When those pages break, the AI classifier filters out cosmetic noise like rotating banners and ad swaps, so what lands in the dashboard and the report is real breakage. Uptime, SSL, domain, Lighthouse and broken-asset alert rules are yours to write once at agency level, and every client site inherits them.
Of the tools compared on this site, SiteLetter is the only one that puts per-page Lighthouse, daily visual change detection and white-label client reports on one rate table, with each monitor switched on per site. Oh Dear's Lighthouse reaches the one URL each monitor tracks, on a simulated mobile device, and its published feature list has no visual change detection (checked August 21, 2026).
Both tools are good. They were built for different audiences, and that audience choice shapes every decision underneath.
"The all-in-one monitoring tool for your entire website. Trusted by tech teams, developers, and marketers worldwide."
"Website Health Monitoring for Agencies"
Oh Dear pricing, checked
Oh Dear prices by monitor, and one monitor tracks one URL. Each one carries uptime every minute, SSL and domain expiry, DNS, a broken-link crawl and a daily Lighthouse audit, on a simulated mobile device, for that URL.
| Monitors | Price |
|---|---|
| Up to 2 | €15 a month |
| Up to 5 | €29 a month |
| Up to 10 | €49 a month |
| Up to 25 | €99 a month |
| Up to 50 | €149 a month |
| Up to 75 | €199 a month |
| Up to 100 | €249 a month |
| Up to 150 | €329 a month |
| Up to 200 | €399 a month |
Source: ohdear.app/pricing Monthly billing, excluding VAT. Above 200 monitors they publish no price. Read from their pricing page on .
- 10 client sites with every monitor on: $48.00 a month, for up to 150 pages.
- Switch a monitor off for a site and that site costs less. See every rate.
- Prepaid credits, no subscription. If they run out, monitoring stops, and you are warned before it does.
Which is cheaper, and for what
Per site, with everything in each box: one Oh Dear monitor with every check they run on that URL, against one SiteLetter site with every monitor on, at the smallest pack whose credits cover that many sites for a month.
| Client sites | Oh Dear, per site | SiteLetter, per site |
|---|---|---|
| 10 | €4.90 (€49/mo for 10 monitors) | $4.62 at the Standard pack, every monitor on |
| 25 | €3.96 (€99/mo for 25 monitors) | $4.21 at the Agency pack, every monitor on |
| 50 | €2.98 (€149/mo for 50 monitors) | $4.21 at the Agency pack, every monitor on |
At any exchange rate between 0.90 and 1.35 dollars per euro, Oh Dear is the cheaper box at fifty sites; at ten and twenty-five sites which box is cheaper depends on the exchange rate on the day.
Oh Dear prices are EUR excluding VAT on monthly billing (annual billing gets 2 months free). SiteLetter prices are USD. No currency conversion is applied, so each figure is the price its own vendor publishes. Where Oh Dear is the cheaper box, the per-page rows and the visual-changes row in the table below are still where SiteLetter wins, and DNS, cron and status pages are still theirs.
What does one paid "site" actually monitor?
Both tools bill per "site" but define "site" differently. This is the apples-to-apples breakdown of everything one billable site covers in each tool, top to bottom.
| Feature | SiteLetter | Oh Dear |
|---|---|---|
| Price | ||
| Pricing unit | 1 site with up to 15 pages (URLs) | 1 URL = 1 monitor |
| Cost per site | $4.80/site a month with every monitor on; less if a site runs fewer of them | €2.00 - €7.50/site (at full tier capacity; a partly filled tier costs more per site) |
| Cost per monitored page / URL | $0.32/page with every monitor on, when the site is fully used | €2.00 - €7.50/URL at tier capacity (same as site cost) |
| Free start | 14 days, no card | 10 days |
| Per-page services (each page on the site monitored individually) | ||
| Uptime checking | Homepage every 1 min from the EU, confirmed from a second region on failure; every monitored page reached daily by the scan | 1 URL only, every 1 min |
| Lighthouse audits | Every monitored page, daily, on two devices | 1 URL only, daily, on a simulated mobile device |
| AI visual regression | Every monitored page, daily, classified | Not on their published feature list (checked August 21, 2026) |
| Broken link checking | Every monitored page, daily | Crawls up to 5,000 reachable pages from the 1 URL |
| Broken image checking | Every monitored page, daily | Included in broken-link crawl, once turned on in their broken-link settings |
| Hostname-level services | ||
| SSL certificate expiry alerts | Yes | Yes |
| Domain expiry alerts | Yes | Yes |
| Sitemap sync (auto-discover pages) | Weekly | Sitemap check only: validates the sitemap and visits the first 5,000 URLs for a 200/300 response. Those pages are not added to uptime or Lighthouse |
| Mixed-content detection | Yes (active + passive, per page, daily) | Yes |
| Monitoring data retention | 2 years (730 days) across uptime incidents, Lighthouse, screenshots, asset checks, reports (raw uptime check rows: 280 days) | Not published as a retention policy |
| Advanced monitoring controls | ||
| Custom HTTP methods (POST/PUT/PATCH for APIs) | No | Yes |
| Content keyword verification (checkstring) | No | Yes |
| Per-check frequency tuning | Fixed defaults | Yes, configurable |
| Client-facing reports | ||
| Scheduled client-facing email report | Yes (weekly, bi-weekly, monthly, quarterly) | Yes (monthly, the one cadence they publish) |
| Report branding (vendor name hidden in the report body) | Yes: white-label, by one org-level toggle | Yes - their pricing page heads the section "White-labeling" (checked August 21, 2026) |
| Per-client branding (logo, color, reply-to) | Yes | Logo and accent colour on the report; a per-client reply-to address is not published |
| Drag-and-drop report builder | Yes | No |
| Recipients receive reports without a login | Yes (a branded email; no account for the recipient) | Yes - the monthly report goes to the client inbox directly, and status pages need no login |
Sources: ohdear.app/features, docs/features/uptime, docs/features/lighthouse, docs/features/broken-links, docs/features/sitemap-monitoring. Verified .
The upshot: to match SiteLetter's per-page coverage on a 15-page client site, an Oh Dear customer has to add 15 separate URL monitors, each counting toward their plan limit.
Quoted from Oh Dear's own uptime feature page: "a single URL uptime monitor won't automatically catch problems on other pages of your website. You'd need to add multiple URL monitors to cover different pages or endpoints."
Which job are you buying for?
Comparing monitor counts flatters whoever wrote the comparison. These are the two questions that actually decide it, at 10 client sites.
For uptime alone, Oh Dear is a complete answer
Oh Dear's entry tier is €15 a month for 2 URL monitors, which is one homepage each across a small roster, and each monitor carries uptime every minute, SSL and domain expiry, DNS and a broken-link crawl for that URL. For an agency that wants a site checked and nothing else, that is a complete answer.
SiteLetter can be bought that way too, since uptime is a line item you can switch on without the rest. But uptime alone is not the job this page is about, and pretending otherwise would mean pricing around a comparison you can run yourself in a minute.
Lighthouse, visual change detection, a branded report
Oh Dear is the one tool on this list that genuinely competes here. They run Lighthouse and publish a branded monthly client report, so matching SiteLetter means buying enough URL monitors to reach every page you want audited: one Oh Dear monitor is one URL, and their own uptime page says a single URL monitor will not automatically catch problems on other pages of the site. What they do not have is day-over-day visual change detection, and their report ships on one cadence against SiteLetter's four.
10 client sites with every monitor on, covering up to 150 monitored pages. Prepaid, nothing recurring.
Oh Dear prices are EUR excluding VAT on monthly billing (annual billing gets 2 months free). SiteLetter prices are USD. No currency conversion is applied, so each figure is the price its own vendor publishes.
Oh Dear figures are the ones that vendor publishes, in the currency they publish them. Verified .
Product-level features
Beyond per-site monitoring. This is where Oh Dear's breadth shows: alert routing, integrations, SSO, and infrastructure layers for teams running production stacks. None of it is available in SiteLetter today. It is built around the client deliverable rather than the infrastructure layer, so if you need those, this is the gap.
| Feature | SiteLetter | Oh Dear |
|---|---|---|
| Probe locations | 3 regions (EU primary + US verifier + AP tiebreaker), monitoring data stored in the EU; screenshots go to OpenAI in the US under SCCs | Multiple worldwide, primary + secondary verification |
| Alert channels | Email, Slack | 12 channels (Email, SMS, Slack, Telegram, Discord, Teams, Google Chat, Pushover, ntfy, Webhooks, OpsGenie, PagerDuty) |
| Public status pages | Not available | Yes, hosted separately |
| Public REST API | Not available | Yes |
| SSO | No | Okta, Entra, Google, SAML |
| Basic Auth / staging support | Not available | Yes |
| DNS record change monitoring | No | Yes |
| Cron / scheduled task monitoring | No | Yes |
| Application health (queues, disk, DB) | No | Yes |
| Ping / TCP port monitoring | No | Yes |
| DNS blocklist monitoring | No | Yes |
Sources: ohdear.app/features, features/notifications, docs/api. Verified .
Where Oh Dear genuinely wins
Oh Dear is an ops console for developers: DNS, cron, ping, status pages, SSO, an API and twelve alert channels. Several of those SiteLetter does not have at all, and a few of them matter a lot if you operate the servers your sites run on. Picking a side is not the same as pretending the other tool has no strengths.
Broader geographic probe coverage
Oh Dear monitors from multiple worldwide locations and verifies every alert from a secondary region before paging you. SiteLetter confirms a down result from a second AWS region before alerting, and escalates to a third only on disagreement (EU primary, US verifier, AP tiebreaker). Homepages are checked every minute; every other monitored page is reached once a day by the daily scan. Monitoring data is stored in the EU. Screenshots go to OpenAI in the US for visual change classification, under EU Standard Contractual Clauses. The two-region-verification pattern is similar in shape, but Oh Dear has wider geographic spread. If your client base spans more continents than EU + North America + APAC, Oh Dear catches regional issues SiteLetter will not see.
Infrastructure monitoring breadth
Cron job and scheduled task monitoring, application health checks, DNS record change detection, TCP port, DNS blocklist, and reverse-monitoring are all genuine Oh Dear strengths. SiteLetter does not monitor any of these. If you operate the servers your sites run on, that gap is real.
Public status pages + authentication support
Oh Dear hosts status pages on its own infrastructure and supports custom HTTP headers, which means it can monitor Basic Auth-protected staging and authenticated API endpoints. SiteLetter monitors public-facing pages only, and has no status pages today.
If your buying criteria is "broadest single-tool coverage of infrastructure and protocols," Oh Dear is the better tool today. If your buying criteria is "the monthly client deliverable that proves the retainer was worth it," SiteLetter is the better tool today.
Where SiteLetter is the better fit
SiteLetter was built specifically for agencies who need two things from a monitoring tool: alerts the moment a client site breaks, and a monthly client deliverable that proves the retainer was worth it. If your buying criteria is "how fast do I find out something is wrong, what gets forwarded to my client every Monday morning, and how many of their pages am I actually covering", these are the wins.
Every monitored page, priced per site
Visual Changes, Page Scores and Content Health cover every monitored page, up to 15 per site, on two devices. With Uptime and Renewals beside them, that is $4.80 per site per month with every monitor on, and each monitor is switched on per site. On Oh Dear one monitor is one URL, so reaching those same 15 pages means 15 separate monitors on that one site, each counting against your plan limit. Their own uptime page says so: a single URL monitor "won't automatically catch problems on other pages of your website".
Zero-config onboarding
Add a URL - that is the entire setup. SiteLetter fetches your sitemap, picks the 15 most important pages (ranked by depth, sitemap priority, and recency), turns every monitor on, and pre-builds your weekly and monthly report templates. Alert rules sit one level up: decide once, at agency level, what you want to be told about, and every client and every site inherits that, the ones you add next year included. You add recipients and you are done. With Oh Dear every piece is manual configuration after the URL, and their monthly client report ships on their template rather than one you shape yourself.
AI-classified visual regression
Daily screenshots of every monitored page, compared against the last good capture, normally yesterday's. An AI classifier sorts each diff big enough to matter into a bucket - rotating ads and banners get auto-dismissed, intentional content updates are logged in the next scheduled client report, a real layout break or missing asset is flagged in the dashboard and called out in that report. Oh Dear does not offer visual regression in any form.
Branded reports, and where they land
Per-client logo, brand color, reply-to address. An agency-branding toggle removes "SiteLetter" from the report. Reports are delivered as branded HTML emails on your schedule. Either way, no SiteLetter login required. Frequencies: weekly, bi-weekly, monthly, quarterly.
Drag-and-drop report builder
Reorder the five report sections (Page Scores, Uptime, Visual Changes, Renewals, Content Health), toggle metrics on or off, pick the frequency. Configured once for your agency: every client's report uses the same template. Recipients and send timing are set per client. The default layout ships ready to send; the builder is for when a client asks for something specific.
The report reaches you first, or your client
The report arrives in your inbox on your schedule, branded as your agency, so you read it first and forward it when you are ready. Your client never sees a SiteLetter login screen. Oh Dear points its branded monthly report at the client inbox, which reaches the client the moment it reaches you. SiteLetter does both: the report lands in your inbox to review and forward, and once you verify a sending domain you can put the client's address on it and let it go out on schedule.
Lighthouse with stable scoring
Lighthouse measures a page load, so an audit run against cold DNS, TLS and CDN caches is partly measuring the state of those caches rather than the page. Two scores taken under different cache conditions are not comparable, which is what makes a raw score a poor trend line in a client report: the page can be untouched and the conditions still different. SiteLetter pre-warms DNS, TLS, and CDN caches before every audit, on every monitored page, every day, so each score is taken under the same conditions as the one before it.
2-year Lighthouse history
SiteLetter keeps every Lighthouse audit, screenshot, asset check, report and uptime incident for 2 years (730 days), on every account. Raw uptime check rows are kept for 280 days. If your client retainer relies on showing month-over-month or year-over-year performance trends, check how far back your current tool keeps its history before you commit to it.
When to pick which
Three honest scenarios.
Agencies with a portfolio of client sites
Many client sites, on any platform. Visual changes and Lighthouse on every monitored page, and a white-label report that reaches your inbox first or your client's inbox directly once your sending domain is verified, are built around the agency job: monitoring value a client can see. The report is the deliverable; the console is not.
DevOps team, infrastructure
Queues, crons, custom services, multiple regions. The cron heartbeat, application health, DNS record monitoring, and ping/TCP checks are built for your job. SiteLetter does not monitor those layers.
One personal or small site
Just want "tell me when it goes down". Oh Dear's entry tier covers 2 monitors at €15/mo and does single-URL monitoring well. SiteLetter is overkill until you are juggling multiple sites and want client-facing reporting.
SiteLetter vs Oh Dear: FAQ
Not at every size. If the homepage of each client site is all you watch, one Oh Dear monitor carries uptime, SSL, domain expiry, DNS and a broken-link crawl for that URL, and SiteLetter's Uptime monitor is homepage-only too, so that is a fair comparison to run against their ladder. Per site with everything in each box, at the pack an agency of that size would buy, SiteLetter is the cheaper box at some roster sizes and Oh Dear at others: the comparison section on this page prints both vendors' per-site figures at 10, 25 and 50 sites, each in the currency its vendor publishes, with the date they were read. The shapes part company on the inner pages. Lighthouse, day-over-day visual regression and broken-asset checks on up to 15 pages are one site on SiteLetter, and 15 separate URL monitors on Oh Dear, each counting against your plan limit.
No. Oh Dear monitors uptime, performance, SSL, broken links, mixed content, DNS, cron jobs, application health, and a few protocol-level checks (ping, TCP, DNS blocklist). It does not screenshot pages or detect visual changes. SiteLetter takes a daily screenshot of every monitored page, diffs it against the last good capture, normally yesterday's, and uses AI to classify each change big enough to matter as noise (rotating banners), intentional updates (logged in the weekly report), or real breakage (flagged in the dashboard and called out in the report you forward).
Yes. Their pricing page publishes a monthly client report carrying your logo and accent colour, alongside status pages on your own domain and a reseller account you bill through. The difference is shape rather than presence: Oh Dear publishes one cadence, monthly, and the report is built from their check set. SiteLetter sends weekly, bi-weekly, monthly or quarterly, per client, with a drag-and-drop builder over the sections, a per-client reply-to address, and Lighthouse plus visual-change history in the report body.
For broken-link checking, yes. Oh Dear's broken-link crawler reaches up to 5,000 pages per site, starting from one URL. Those crawled pages are not individually uptime-checked or Lighthouse-tested, only scanned for broken links, broken images and mixed content. SiteLetter covers up to 15 pages per site on the daily pass: Lighthouse, visual, broken assets. Uptime probes the homepage every minute on top of that. It is a different coverage shape: fewer pages, far more checks on each one.
Public status pages on your own domain, cron job monitoring, application health checks, DNS record change detection, ping and TCP port monitoring, more alert channels (PagerDuty, OpsGenie, SMS, Discord, Telegram, Teams), a public REST API, SSO, and a reseller account that runs every client from one subscription billed under your name. If those are part of your buying criteria, Oh Dear is the right tool today. (Multi-region probes used to be on this list; as of May 2026 SiteLetter probes from the EU and escalates any failed check to a US verifier, with a Singapore region breaking ties, and monitoring data stored in the EU; screenshots go to OpenAI in the US under SCCs.)
AI day-over-day visual regression that classifies each diff big enough to matter as noise / intentional / breakage (Oh Dear does not screenshot pages or detect visual changes). Per-page Google Lighthouse on every monitored page daily with DNS/TLS/CDN cache warmup (Oh Dear runs Lighthouse too, but on the single monitored URL per site and without the four-score-per-page breakdown, alongside its uptime, broken-link and certificate checks). Per-client report control: logo, brand colour and reply-to address set per client, four cadences to pick from, and a drag-and-drop builder over the sections (Oh Dear publishes a branded monthly client report, on one cadence, built from their own check set). Sitemap auto-discovery: add a domain, SiteLetter discovers and ranks your pages, monitors up to 15 of them, and turns every monitor on for the site, at $4.80/site a month with every monitor on (Oh Dear bills one URL per "site", and its Lighthouse audit reaches the one URL each monitor tracks, on a simulated mobile device).
Yes - and it is usually faster than the original Oh Dear setup was. Your Oh Dear monitor list collapses into a much shorter SiteLetter site list, because each SiteLetter site covers up to 15 pages automatically (a 100-monitor Oh Dear setup packs into 7 SiteLetter sites when every site is filled to the 15-page cap, and more than that as the same pages spread across more domains. That arithmetic assumes those monitors are extra pages of domains you already cover: the collapse is per domain, not per monitor, so a hundred monitors on a hundred separate client homepages stays a hundred SiteLetter sites). Add each unique site once and SiteLetter handles the rest: sitemap fetch, page selection, every monitor switched on, and weekly + monthly report templates pre-built. Alert rules are yours to write, and you write them once at agency level: you decide what you want to be told about for the whole portfolio a single time rather than monitor by monitor, and every client and every site inherits that. New accounts get 14 days of full monitoring on one site with no card, so pick one client site to validate the full experience on before buying credits and bringing the rest over.
Still have questions? Get in touch.
Comparison based on publicly available Oh Dear feature documentation, last verified . Pricing was read separately from their pricing page on , which is the date the tier figures on this page carry. Oh Dear is 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 Oh Dear. For the most current Oh Dear pricing and feature information, see ohdear.app.
You set up care-plan reporting once.
After that it runs without you.
SiteLetter is the kind of tool you forget you're using, until your client thanks you for the report you didn't write.
- ✓ Just add a domain. SiteLetter auto-discovers pages, starts monitoring, schedules reports. You pick your alert rules and who gets each report.
- ✓ No scripts to install. SiteLetter monitors from the outside, like a real visitor.
- ✓ Nothing recurring. No subscription, no contract. You buy credits when you want them and each site spends its own.