DebugBear vs Sitebulb in 2026: Continuous performance monitoring vs full-site technical crawling
One tracks Core Web Vitals and Lighthouse scores around the clock from $68 a month. The other crawls entire sites for 300+ prioritized technical SEO hints starting at $18 a month.
DebugBear
Sitebulb- DebugBear tracks Core Web Vitals continuously through RUM and synthetic testing. Sitebulb does not have a dedicated Core Web Vitals monitoring module; it surfaces performance-related issues as part of its broader crawl.
- Sitebulb includes JavaScript rendering on every plan, including the $18/month Lite tier. DebugBear is not a crawler, so JS rendering as a crawl feature does not apply.
- DebugBear gates real-user monitoring behind the Pro plan at roughly $149/month. Sitebulb has no RUM feature at any tier; it is a crawl-based auditing tool.
- Sitebulb Cloud can crawl up to 10 million URLs per audit. DebugBear does not publish a URL cap and instead offers unlimited domains across all paid plans.
- DebugBear connects to Looker Studio on every paid plan. Sitebulb reserves its Data Studio integration for the Cloud tier.
- Sitebulb has an MCP server in development, currently on a waitlist, aimed at letting AI tools query crawl data directly.
DebugBear and Sitebulb both live in the technical SEO toolbox, but they solve different problems. DebugBear watches performance over time: real-user monitoring, scheduled synthetic tests, and Lighthouse score tracking that catches a regression the day it happens. Sitebulb crawls a site end to end and hands back 300+ prioritized hints across crawlability, indexation, content, and technical categories, with JavaScript rendering included on every plan. If your question is "did our LCP just get worse after last night's deploy," DebugBear answers it. If your question is "what is actually wrong with this site," Sitebulb answers it. Plenty of agencies end up running both, since neither one covers what the other does.
The tools at a glance
DebugBear
Web performance monitoring that combines real-user data, synthetic testing, and Lighthouse score tracking to catch regressions before they affect rankings.
DebugBear is built around one job: telling you when your site got slower and why. It pulls together real-user monitoring (RUM), scheduled synthetic tests, and Lighthouse score tracking onto the same timeline, so a Core Web Vitals dip can be traced back to a specific deploy or third-party script change instead of showing up as an unexplained trend line weeks later.
Unlimited domains are included on every paid plan, which makes DebugBear practical for agencies watching a whole client roster rather than a single site. The Looker Studio connector turns that monitoring data into client-facing dashboards without custom development work, and Lighthouse score tracking covers Performance, Accessibility, Best Practices, and SEO categories over time, not just a single Core Web Vitals number.
The catch is that RUM, arguably the platform's most useful data source, sits behind the Pro plan at roughly $149/month. The Starter plan at around $68/month gets you synthetic testing and Lighthouse tracking, which is useful but incomplete without the real-user layer showing what actual visitors experienced.
| Feature | Starter ~$68/month | Pro ~$149/month | Enterprise Contact |
|---|---|---|---|
| Synthetic tests | Limited | More | Custom |
| Real-user monitoring | No | Yes | Custom |
| Unlimited domains | Yes | Yes | Yes |
| Looker Studio integration | Yes | Yes | Yes |
| White-label exports | No | Yes | Yes |
Sitebulb
Website crawler for technical SEO audits with prioritized hints and visual reporting
Sitebulb crawls a site and comes back with an opinion, not just a spreadsheet. Every crawl surfaces issues through the platform's 300+ Hints system, ranked by priority, each with educational context explaining why the issue matters. That framing is what separates it from a raw crawler: junior team members can act on findings without a senior SEO translating the data first.
JavaScript rendering is included at no extra cost on every plan, including the $18/month Lite tier, which is notable since several competing crawlers charge separately or require an enterprise upgrade for rendered crawls. Desktop Pro handles up to 500,000 URLs per audit, and Sitebulb Cloud extends that to 10 million URLs with scheduled recurring crawls and team collaboration built in.
What Sitebulb does not do is monitor performance continuously. There is no RUM, no synthetic Core Web Vitals tracking, and no Lighthouse score history. It is built for periodic, comprehensive audits rather than the always-on regression detection DebugBear provides. An announced MCP server, still on a waitlist, would let AI tools query audit data directly, but it is not shipped yet.
| Feature | Lite $18/month | Pro $42/month | Cloud From $125/month |
|---|---|---|---|
| URLs per audit | 10,000 | 500,000 | Up to 10 million |
| SEO Hints | 100+ | 300+ | 300+ |
| JavaScript crawling | Yes | Yes | Yes |
| Scheduled audits | No | Yes | Yes |
| Data Studio integration | No | No | Yes |
Head-to-head feature comparison
| Feature | DebugBear | Sitebulb |
|---|---|---|
| Primary focus | Continuous performance monitoring: RUM, synthetic testing, and Lighthouse score tracking | Full-site technical SEO crawl with 300+ prioritized hints |
| Real-user monitoring (RUM) | Yes, on the Pro plan and above | No |
| Synthetic performance testing | Yes, on every plan | No, crawl-based audits rather than continuous monitoring |
| Full-site technical crawl | No, not a crawler | Yes, from 10,000 URLs on Lite up to 10 million on Cloud |
| JavaScript rendering | Not applicable | Yes, included on every plan at no extra cost |
| Core Web Vitals tracking | Yes, tracked across RUM and synthetic data | No dedicated Core Web Vitals module |
| Lighthouse score tracking over time | Yes, Performance, Accessibility, Best Practices, and SEO scores | No |
| Scheduled/automated runs | Yes, synthetic tests run on a configured schedule | Yes, on Pro and Cloud plans |
| Looker Studio / Data Studio integration | Yes, on every plan | Data Studio integration on Cloud only |
| Branded/white-label reports | White-label exports on Pro and Enterprise | Yes, customized PDF reports on Pro and Cloud |
| API access | Limited on Starter, full access on Pro and Enterprise | No public API documented |
| Free trial | 14 days, no credit card required | 14 days, no credit card required |
| Starting price | ~$68/month | $18/month |
Which should you choose?
DebugBearSitebulbSitebulbDebugBearSitebulbDebugBearThese tools barely compete for the same budget line. DebugBear is a monitoring product: it watches performance metrics change over time and tells you when something broke. Sitebulb is an auditing product: it crawls a site once (or on a schedule) and tells you everything wrong with it right now, prioritized by impact. An agency doing both technical audits and ongoing performance work for a client will likely end up paying for both rather than picking one.
Bottom line
If the job is catching a Core Web Vitals regression the week it happens, get DebugBear, and budget for the Pro plan since Starter without RUM only tells half the story. If the job is a full technical SEO audit with prioritized fixes a junior can act on, get Sitebulb, and start on Lite unless the site clears 10,000 URLs. Most agencies serious about both performance and technical health will eventually run both tools rather than stretch one to cover the other's job.
Frequently asked questions
Is DebugBear or Sitebulb better for tracking Core Web Vitals over time?
DebugBear is built for this specifically: it tracks LCP, CLS, and INP continuously across both real-user and synthetic data sources with historical trend charts. Sitebulb does not have a dedicated Core Web Vitals monitoring module; its 300+ Hints cover technical SEO issues broadly, and performance shows up only as part of that wider crawl.
Does Sitebulb include JavaScript rendering on every plan?
Yes, including the $18/month Lite tier. This matters because several competing crawlers either charge extra for rendered crawls or restrict JS rendering to a higher tier, so Sitebulb's inclusion at the entry price is a genuine differentiator for JavaScript-heavy sites.
Can I use DebugBear and Sitebulb together for the same client?
Yes, and it is a common pairing since the two tools do not overlap much. Sitebulb handles the periodic full-site technical audit, while DebugBear runs continuously in the background catching performance regressions between those audits.
Which tool is cheaper for a solo SEO consultant?
Sitebulb is cheaper to start, at $18/month for the Lite plan versus roughly $68/month for DebugBear Starter. If real-user monitoring matters to your work, though, DebugBear's entry price does not include it; you would need the ~$149/month Pro plan, which changes the comparison considerably.
Do DebugBear and Sitebulb offer free trials?
Both offer a 14-day free trial with no credit card required, so you can test either tool against a real client site before committing to a paid plan.
Which tool has an API for pulling data into a custom reporting pipeline?
DebugBear has API access on every plan, though it is limited on Starter and full on Pro and Enterprise. Sitebulb does not publish a public API, so teams that need programmatic access to crawl data will need to wait for its announced MCP server, which is still on a waitlist.