Screaming Frog SEO Spider and Sitebulb: side-by-side
A side-by-side comparison of Screaming Frog SEO Spider and Sitebulb — features, pricing, strengths, and where each tool falls short.
Screaming Frog SEO Spider and Sitebulb occupy the same technical SEO crawling niche and share more similarities than differences on paper — both crawl over 300 issue types, both render JavaScript, and neither provides keyword research or backlink data natively. The realistic buyer is an SEO consultant or agency professional who has already narrowed down to desktop crawlers and is deciding which one fits their workflow, budget, and team structure. Price structure and how each tool presents its findings are where the meaningful divergence begins.
Screaming Frog costs £199 per user per year (roughly £16.60/month) with a permanent free tier capped at 500 URLs. Sitebulb starts at $18/month for Lite (capped at 10,000 URLs) and $42/month for Pro, which unlocks scheduled audits and up to 500,000 URLs per crawl. For a single practitioner, Screaming Frog is materially cheaper over a year. For a team that wants cloud-hosted shared workflows, Sitebulb Cloud at $125+/month is the only option in this pair that provides genuine browser-based multi-user access out of the box.
The other dividing line is philosophy. Screaming Frog surfaces raw, highly configurable crawl data — experienced SEOs appreciate its depth and the ability to write custom extractions, XPath queries, and integrate AI prompts mid-crawl. Sitebulb wraps its crawl output in a prioritized 'Hints' system, attaching explanations and recommended fixes to each issue. That distinction matters enormously for how audit results get communicated: Sitebulb generates client-ready PDF reports; Screaming Frog outputs data that the SEO must structure and present themselves.
What each tool is
Screaming Frog SEO Spider
Screaming Frog SEO Spider is a locally installed website crawling tool built and sold by Screaming Frog Ltd. It crawls sites to surface over 300 SEO issues covering broken links, redirects, duplicate content, metadata, structured data, hreflang, JavaScript rendering, and more. It integrates with Google Analytics, Google Search Console, PageSpeed Insights, Majestic, Ahrefs, Moz, and AI providers including OpenAI, Gemini, Ollama, and Anthropic. The tool runs as a desktop application on Windows, macOS, and Linux, with an optional cloud-based deployment documented in the user guide. It is sold on a per-user, per-year licence model.
Sitebulb
Sitebulb is a website auditing tool available as both a desktop application (Windows and Mac) and a cloud-hosted product. It crawls websites and surfaces technical SEO issues through a system of 300+ prioritized 'Hints', each accompanied by explanations and recommended fixes. It integrates with Google Analytics, Google Search Console, and Google Sheets, and supports JavaScript rendering. The desktop editions (Lite and Pro) run locally on a user's machine; Sitebulb Cloud moves that capability to the browser for teams that need shared access or large-scale crawling. The product is marketed to SEO consultants, agencies, and in-house professionals.
At a glance
Screaming Frog SEO Spider
Site Crawler / Technical SEO
A desktop website crawler for Windows, macOS, and Linux, widely used by SEOs and agencies for technical site audits.
Paid Licence (1–4 seats)
- •Free version available — permanently limited to 500 URLs per crawl; most advanced features restricted
- •5–9 licences: £189 per licence per year
- •10–19 licences: £179 per licence per year
- •20+ licences: £169 per licence per year
- •Licences are per user; bulk discounts apply at 5 or more licences purchased at once
Sitebulb
Site Crawler / Technical SEO
A desktop and cloud website crawler built for technical SEO audits, known for its prioritized Hints system and data visualizations.
Sitebulb Lite
- •Lite: 1 user, 10,000 URLs per audit, 100+ Hints, JS crawling, GA/GSC/Sheets integration
- •Pro: $42/month, 1 user, 500,000 URLs per audit (extendable to 2M), 300+ Hints, scheduled audits, audit comparisons, customized PDF reports; additional users from $11/month
- •Sitebulb Cloud: from $125/month, 2+ users, no project limits, automated recurring crawls, Looker Studio integration
- •14-day free trial at Pro equivalent, no credit card required
- •15% discount available on yearly plans
Feature comparison
Side-by-side feature breakdown across pricing, data, workflows, and collaboration.
| Feature | Screaming Frog SEO Spider | Sitebulb |
|---|---|---|
| Data & coverage | ||
| Native Google Search Console integration | Yes | Yes |
| Keyword research database | No | No |
| Backlink index | No | No |
| SERP feature tracking | No | No |
| Workflows built for you | ||
| Quick wins (pages 1 click from page 1) | No | No |
| Content decay detection | No | No |
| Weak & dead URL identification | Yes | Yes |
| AI content briefs | No | No |
| Collaboration & sharing | ||
| Magic-link read-only sharing | No | No |
| Multi-property dashboards | No | No |
| Seats included on entry plan | 1 user | 1 user |
| Pricing & value | ||
| Entry plan price | £199/year | $18/mo |
| Free tier | Yes | No |
| Crawling | ||
| JavaScript rendering | Yes | Yes |
| Crawl limit on entry plan | Unlimited* | 10,000 URLs |
| Scheduled / cloud crawling | Scheduled (local); cloud via manual setup | Pro and Cloud only |
| Log file analysis | No | Not publicly documented |
| Runs locally (desktop) or in the cloud | Desktop (Windows, macOS, Linux) | Both |
The differences that actually matter
Price structure and what you actually pay
Screaming Frog is sold as an annual desktop licence: £199 per user for 1–4 seats, dropping to £169 at 20+. Sitebulb is monthly-first: Lite at $18/month (≈$216/year) is more expensive than Screaming Frog annually, and Pro at $42/month (≈$504/year) is significantly more. A 15% annual billing discount reduces those figures but does not close the gap. Screaming Frog also offers a permanent free tier for sites under 500 URLs; Sitebulb offers only a 14-day trial with no permanent free option.
Crawl limits and URL scale
On paid plans, Screaming Frog removes the 500-URL cap entirely — the ceiling is determined by the memory and storage of the local machine, which means very large sites are technically feasible. Sitebulb Lite is hard-capped at 10,000 URLs, making it unsuitable for anything but small sites. Sitebulb Pro raises that to 500,000 URLs (extendable to 2 million). For enterprise-scale crawls on a budget, Screaming Frog's uncapped paid licence has a practical advantage, assuming sufficient local hardware.
Scheduling, automation, and team deployment
Screaming Frog supports scheduled crawls as a paid feature, but those schedules run on the local machine — the desktop must stay on and connected. There is no managed cloud service; a user guide documents a manual cloud deployment path. Sitebulb offers scheduled audits from the Pro plan ($42/month) and a fully browser-based Cloud product from $125/month with automated recurring crawls and Looker Studio integration. Teams that want always-on automated monitoring without leaving a desktop running will find Sitebulb Cloud is the only option here.
Issue presentation and reporting
Screaming Frog presents crawl findings as filterable data tables across many tabs — powerful for analysts but requiring manual effort to turn into a client report. Sitebulb's Hints system categorizes and prioritizes 300+ issues, attaches explanations and fix guidance to each, and exports into customized branded PDF reports. For agencies billing on audit deliverables, Sitebulb reduces the production time between crawl and client presentation. Screaming Frog integrates with Google Sheets via crawl exports, but building a structured narrative report is the SEO's responsibility.
Platform availability and local dependencies
Screaming Frog runs on Windows, macOS, and Linux. Sitebulb desktop supports Windows and Mac only — Linux users have no desktop option. Both tools' desktop editions rely on local hardware for crawl capacity; crawling large sites on either will consume significant RAM. Sitebulb Cloud removes that local dependency entirely for teams willing to pay the $125+/month entry point. Screaming Frog has no equivalent managed cloud product, so hardware constraints remain a genuine limitation for the heaviest crawl workloads on that tool.
Where each tool wins and falls short
Screaming Frog SEO Spider
Strengths
- Audits over 300 SEO issues in a single crawl including hreflang, AMP, structured data, and accessibility
- Native integrations with Google Search Console, Google Analytics, PageSpeed Insights, and third-party link metric APIs
- JavaScript rendering via integrated Chromium engine supports Angular, React, Vue.js, and other frameworks
- Very low annual cost relative to SaaS alternatives, with a functional permanent free tier
Weaknesses
- Runs locally — crawl speed and URL volume are constrained by the user's own hardware memory and storage
- No native keyword research database or backlink index; link metrics require a paid third-party API (Majestic, Ahrefs, or Moz)
- Licences are per user; teams require individual licences per seat, adding cost for larger groups
- No built-in SERP tracking, content decay detection, or quick-wins workflow based on ranking data
Sitebulb
Strengths
- 300+ categorized, prioritized Hints with built-in educational context for each issue
- JavaScript rendering included at no extra cost on all plans
- Integrates directly with Google Analytics, Google Search Console, and Google Sheets
- Flexible deployment: desktop for individuals, cloud for teams
Weaknesses
- No keyword research database, backlink index, rank tracking, or SERP feature monitoring — purely a crawler/auditor
- Lite plan is capped at 10,000 URLs, which is restrictive for any moderately sized site
- Desktop editions depend on the user's local machine hardware; crawling very large sites may exceed machine capacity
- Scheduled audits require Pro ($42/month) or Cloud ($125+/month) — not available on the entry Lite plan
Who each tool fits
Screaming Frog SEO Spider
Best for
- •Technical SEOs and agencies running deep on-site audits across large or complex websites
- •Teams that need JavaScript rendering, custom extraction, and structured data validation in a single tool
- •SEOs who want a low-cost, locally run crawler with no monthly subscription
Not ideal for
- •Teams that need cloud-hosted, always-on scheduled crawling without manual desktop involvement
- •Marketers looking for rank tracking, keyword research, or backlink analysis within the same tool
- •Users who need multi-seat collaboration or shared dashboards without purchasing separate per-user licences
Sitebulb
Best for
- •SEO consultants and agencies that want deep technical audits with prioritized, explained recommendations
- •Teams needing JavaScript-rendered crawling without paying a per-crawl premium
- •Professionals who want to share PDF audit reports with clients or integrate crawl data into Google Sheets
Not ideal for
- •Teams that need keyword research, rank tracking, or backlink analysis in the same platform — Sitebulb does not provide these
- •Organizations that want fully cloud-based shared workflows without paying Cloud-tier prices ($125+/month)
- •Sites requiring continuous automated monitoring on the entry (Lite) plan, as scheduled audits are a Pro-and-above feature
Which should you choose?
Screaming Frog is the sharper instrument for technically advanced SEOs who want maximum configurability at minimum annual cost and are comfortable transforming raw crawl data into deliverables. Sitebulb wins for consultants and agencies whose workflow centres on client-facing reporting, guided prioritization, and — at the Cloud tier — shared team access without per-seat desktop licences.
Choose Screaming Frog SEO Spider if…
- Your annual budget per user is under £200 and you want a fully functional paid crawler without a monthly SaaS commitment
- You need deep custom extraction, AI-assisted crawl prompts (OpenAI, Gemini, Anthropic, Ollama), or hreflang/AMP validation as part of routine audits
- You work on Linux, where Sitebulb desktop is unavailable — Screaming Frog runs on Windows, macOS, and Linux
- You already have API access to Ahrefs, Majestic, or Moz and want to pull link metrics directly into crawl data during the audit
Choose Sitebulb if…
- You deliver audits to clients who need a clear, prioritized list of issues with explanations — Sitebulb's Hints and customized PDF reports are built for that handoff
- Your team needs scheduled, recurring audits: Pro at $42/month unlocks scheduled crawls without requiring manual desktop intervention
- You manage multiple auditors and want cloud-hosted shared access — Sitebulb Cloud from $125/month provides this without per-seat desktop installs
- You need audit comparison across crawls (tracking what changed between audit runs), which is a built-in Pro feature not natively available in Screaming Frog
Frequently asked questions
What buyers ask when weighing Screaming Frog SEO Spider and Sitebulb.
Yes, for a single user. Screaming Frog costs £199 per year (~£16.60/month). Sitebulb Lite is $18/month (~$216/year) and Pro is $42/month (~$504/year). Even with Sitebulb's 15% annual discount, Screaming Frog undercuts both plans in annual cost. For teams needing Sitebulb Cloud, the gap widens further — Cloud starts at $125/month.
At the Pro tier, Sitebulb allows up to 500,000 URLs per audit, extendable to 2 million. Screaming Frog's paid licence has no hard URL cap — the limit is your machine's available memory and storage. For most sites, both are sufficient. For very large crawls on modest hardware, neither has a definitive advantage; Sitebulb Cloud removes the hardware constraint entirely.
Sitebulb has a clear structural advantage here. Its Pro plan includes customized branded PDF reports built from the prioritized Hints output, which are designed for direct client handoff. Screaming Frog does not have a built-in report builder; users typically export data to Excel, Google Sheets, or an external template to construct client-facing documents.
Yes. Screaming Frog uses an integrated Chromium engine to render JavaScript, supporting Angular, React, Vue.js, and similar frameworks. Sitebulb includes JavaScript rendering on all plans — including the entry-level Lite plan — at no extra cost. Neither charges a per-crawl premium for JS rendering.
Yes. Screaming Frog SEO Spider runs on Windows, macOS, and Linux. Sitebulb desktop is available only on Windows and Mac. Linux-based SEOs or teams working on Linux servers have no Sitebulb desktop option, making Screaming Frog the default choice in that environment.
Sitebulb has a more complete automation story. Scheduled audits are available from the Pro plan ($42/month) and run without manual intervention. Sitebulb Cloud ($125+/month) adds fully automated recurring crawls in a hosted environment. Screaming Frog supports scheduling but runs it locally — the machine must be on and running. There is no managed Screaming Frog cloud crawling service.
Neither tool includes a native keyword research database, backlink index, or rank tracking. Screaming Frog can pull link metrics during a crawl via paid API integrations with Ahrefs, Majestic, or Moz, but those require separate subscriptions. Sitebulb has no equivalent third-party link metric integration documented. Both are purely crawl-and-audit focused.
Screaming Frog licences are per user — each team member needs their own £199/year licence, though bulk pricing reduces this to £169 at 20+ seats. Sitebulb Pro adds users from $11/month each. Sitebulb Cloud, starting at $125/month, provides shared browser-based access for two or more users, which is more efficient for larger teams that want a single shared environment rather than individual desktop installs.