Compare
SiteGuardian vs Sentry. Sentry watches code paths; SiteGuardian watches the URLs.
Sentry watches your code paths. It does not crawl your site for broken links, does not watch your checkout, and does not test your forms. SiteGuardian ships uptime, SSL expiry, broken-link coverage, checkout-failure monitoring, and form-failure monitoring on every paid plan, in one inbox.
- One loud email when your site, checkout, or forms go down. No dashboard login.
- Permanent minutely probe cadence on the paid SiteGuardian plan.
- SSL expiry alerts on every paid SiteGuardian plan, included — not an add-on.
- Watches the URL list you configured and re-probes it for broken links, in the same email.
- Watches your checkout and your contact form — alerts in the same email when either breaks.
- No free tier on SiteGuardian. You pay for the watch, by the month.
- Custom slow threshold per URL, set in plain English.
- Built for one founder, one inbox, one storefront.
When Sentry is the right fit
Sentry is the right fit when you have an app or backend codebase and need error tracking, performance tracing, release health, and session replay — and you have already wired (or are willing to wire) the SDK into your runtime.
When SiteGuardian is the right fit
SiteGuardian is the right fit when you have a storefront, a URL list, and a checkout or form that you want watched from the outside without instrumenting your app code.
Feature-by-feature
Where each one differs, side by side.
The rows below are the axes a small shop should care about most when choosing a monitor. Anything outside this list is something most small shops do not use.
| Feature | SiteGuardian | Competitor |
|---|---|---|
| Probe cadence (paid) | Every minute | Single uptime monitor, plus per-alert add-on ($1.00/alert) |
| Probe cadence (free tier) | 1 uptime monitor on Developer free | |
| Alert destination | One inbox | Email (Developer) + Slack, MS Teams, PagerDuty, Discord, webhooks (Team+) |
| Public status page | ||
| Custom slow threshold per URL | ||
| Maintenance windows | Pause via dashboard | Mute via project / alert rules |
| Free tier | Developer free, 5K errors/mo, 5M spans/mo, 50 replays/mo | |
| Pricing model (paid) | $19/mo Starter, $39/mo Pro, $299 once Lifetime | Team $26/mo annual; Business $80/mo annual; Enterprise custom |
| AI-powered root cause | Not yet available | Seer AI debugger (Autofix + Suspect Commits + root-cause) on Team/Business |
| SSL expiry alerts | ||
| Broken-link coverage | Watches your configured URL list | |
| Checkout-failure monitoring | ||
| Form-failure monitoring |
Pricing, line by line
Sentry’s real public pricing, next to SiteGuardian’s.
Each row is one tier the competitor publishes on their pricing page, plus SiteGuardian Starter / Pro / Lifetime. The verification trail below the table names the source URL and the date we re-checked it.
| Tier | Price | What you get |
|---|---|---|
SiteGuardianSiteGuardian Starter | $19/month | 1 site, 10 URLs, every-5-min probes |
SiteGuardianSiteGuardian Pro | $39/month | 3 sites, 50 URLs, every-1-min probes |
SiteGuardianSiteGuardian Lifetime | $299 once | 1 site, 50 URLs, every-5-min probes, all future updates included |
CompetitorSentry Developer | $0/month | 1 user, 5K errors/mo, 5M spans/mo, 50 replays/mo, 1 uptime + 1 cron monitor, email alerts |
CompetitorSentry Team | $26/month, billed annually | Unlimited users, 50K errors/mo, 20 dashboards, Seer AI debugger (sub required), integrated alerts |
CompetitorSentry Business | $80/month, billed annually | Unlimited dashboards, 1,000 metric monitors, anomaly detection, SAML + SCIM, up to 90-day retention |
CompetitorSentry Enterprise | Custom | Technical account manager, dedicated support, custom data residency, advanced inbound filtering |
Verification trail
- SiteGuardian — SiteGuardian Starter: https://siteguardian.app/pricingverified 2026-07-17
- SiteGuardian — SiteGuardian Pro: https://siteguardian.app/pricingverified 2026-07-17
- SiteGuardian — SiteGuardian Lifetime: https://siteguardian.app/pricingverified 2026-07-17
- Sentry — Sentry Developer: https://sentry.io/pricing/verified 2026-08-02
- Sentry — Sentry Team: https://sentry.io/pricing/verified 2026-08-02
- Sentry — Sentry Business: https://sentry.io/pricing/verified 2026-08-02
- Sentry — Sentry Enterprise: https://sentry.io/pricing/verified 2026-08-02
Honest pros & cons
What each tool genuinely does well — and where it’s rough.
Sentry
Pros
- Dominant error-tracking brand in the dev-tool category; deep SDK coverage across JavaScript, Python, mobile, Go, Java, Ruby, PHP, .NET, Rust, and 150+ languages.
- Real free Developer tier (1 user, 5K errors/mo, 5M spans/mo, 50 session replays/mo as of August 2026).
- Performance tracing, release health, and session replay shipped natively — no extra product to integrate.
- Seer AI debugger on Team and Business tiers: Autofix, Suspect Commits, root-cause analysis, and AI code review (subscription required).
- Mature integrations ecosystem: GitHub, GitLab, Jira, Linear, Slack, MS Teams, PagerDuty, Discord, Opsgenie, webhooks.
- Alerts route to email (Developer) or integrated tools — Slack, MS Teams, PagerDuty, Discord, webhooks on Team and Business.
- SAML SSO and SCIM provisioning shipped on Business; HIPAA / SOC2 / ISO 27001 compliance posture for regulated teams.
Rough edges
- Sentry is an in-app error tracker, not a URL/site-availability product — per-URL HTTP probes are out of scope; the single uptime monitor on every plan is a Labs/NEW peripheral, not a dedicated uptime product.
- No public status page on any tier (Developer, Team, Business, or Enterprise).
- No broken-link coverage; Sentry only sees URLs when an exception is thrown from inside the runtime.
- No dedicated checkout-path probe and no dedicated form-path probe; you only get signal if the SDK is wired in and the handler throws.
- The SDK must be installed for value to land — a static storefront, a no-code shop, or a third-party-hosted checkout gets no Sentry signal.
SiteGuardian
Pros
- One inbox, one email per outage — broken-link, checkout, form, SSL, uptime all stack into the same loud email.
- Per-URL slow thresholds on every plan, set in plain English.
- No per-monitor, per-seat, or per-check math. Three flat tiers.
- Minutely probe cadence on Pro, paid from day one.
Rough edges
- No free tier; you pay for the watch from the first URL.
- No public status page in the boxed product; no on-call rotation or incident timeline.
- No error-tracing or release-health surface — that is a different category, and Sentry owns it.
Who it’s for
The two buyer profiles — and which one you are.
Sentry is for
An app team (backend / frontend / mobile engineers) that needs error tracking, performance tracing, release health, and session replay across a deployed codebase, and is willing to wire the SDK into the runtime.
SiteGuardian is for
A one-founder Shopify, WordPress, Squarespace, or Wix shop that wants the four SG-killer checks in one inbox without instrumenting the storefront.
The verdict
Sentry for code paths; SiteGuardian for the URLs your code does not see.
Pick SiteGuardian if
A one-founder Shopify, WordPress, Squarespace, or Wix shop that wants uptime, broken-link coverage, checkout-failure monitoring, form-failure monitoring, and SSL expiry in one loud email without instrumenting the storefront.
Pick Sentry if
An app team with a deployed codebase that needs error tracking, performance tracing, release health, session replay, and the Seer AI debugger wired in via SDK, and is willing to live without a URL-side probe product.
Frequently asked
The buying-time questions, answered flat.
Frequently asked
Mega comparison
See every comparison we wrote.
Fourteen alternatives, side by side in one decision matrix.
Try it
If Sentry feels heavier than you need. Try SiteGuardian.
Starter is $19 a month. One site, ten URLs, every-five-minute checks. Pro is $39 a month. Three sites, fifty URLs, every-minute checks. Lifetime is $299 paid once and stays yours with every future update included.
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