Sitebulb costs $18/mo.
These cost $0.
5 free alternatives to Sitebulb, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
Sitebulb vs Free Alternatives Matrix
Quick side-by-side comparison · $0/mo vs $18/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| SiteOne Crawler | open source | MIT | Local | ★ 841 | Sitebulb vs SiteOne Crawler → |
| LibreCrawl | open source | MIT | Self-host | ★ 827 | Sitebulb vs LibreCrawl → |
| SEOnaut | open source | MIT | Self-host | ★ 751 | Sitebulb vs SEOnaut → |
| FreeCrawl | open source | MIT | Local | ★ 87 | Sitebulb vs FreeCrawl → |
| Crawly | free | proprietary, free | Local | ★ $0 forever | Sitebulb vs Crawly → |
The picks
4 open source · 1 free to use · ranked by fit
- 01
SiteOne Crawler
open sourceMITLocal841jun 2026Crawls locally, calculates a quality score and tells you what to fix first; almost suspiciously on brief.
The catch vs SitebulbIts fix-first scoring is useful, but its prioritization and guided evidence are less polished than Sitebulb's.
Install, platforms & data +
- platforms
- desktopclione-click install
- install
- Download a prebuilt desktop or CLI binary for Windows, macOS or Linux
- setup
- None for ordinary crawling; JavaScript rendering needs Chrome or Chromium, or the one-time headless-shell download
- engines
- Optional OpenAI, Anthropic, Gemini, vLLM, Ollama, LM Studio or any OpenAI-compatible endpoint
- your data
- Runs locally and writes project results plus HTML, JSON or text reports and exports to the user's disk
- checked
- 2026-08-11
- 02
LibreCrawl
open sourceMITSelf-host827jun 2026Unlimited crawls and a browser dashboard with audits; prioritization is plainer, but the evidence is there.
The catch vs SitebulbIt has no durable project history and presents much plainer prioritization and evidence than Sitebulb.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Docker Compose, or a Python environment plus Playwright
- setup
- Docker or Python plus Playwright is required, and local mode has no authentication unless the operator adds it
- your data
- Settings live in browser localStorage; each browser session has isolated crawl data that expires after one hour unless exported as CSV, JSON or XML
- checked
- 2026-08-11
- 03
SEOnaut
open sourceMITSelf-host751may 2026Stores audits and sorts issues by severity; not as pretty as Sitebulb, equally capable of ruining your afternoon.
The catch vs SitebulbIt produces a simpler severity list without Sitebulb's rich visual hints, explanations and guided investigation.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Docker Compose with MySQL 8.4, then expose the web UI behind HTTPS
- setup
- Docker, MySQL and a reverse proxy are required; its default exposed port is plain HTTP
- your data
- Sites, crawl results and audit history live in the self-hosted MySQL database
- checked
- 2026-08-11
- 04
FreeCrawl
open sourceMITLocal87jul 2026A desktop crawler with 200 checks, issue evidence and project comparisons; the hint engine is younger, not imaginary.
The catch vs SitebulbIts hint engine and visual prioritization are younger and less proven than Sitebulb's mature audit guidance.
Install, platforms & data +
- platforms
- desktopclione-click install
- install
- Windows installer or portable build, macOS DMG, or Linux AppImage, deb or rpm
- setup
- The prebuilt apps install normally, but the macOS build may require bypassing Gatekeeper for an unsigned application
- engines
- Optional OpenAI, Anthropic and local Ollama; optional GSC, GA4, PageSpeed, Ahrefs, Moz, Semrush, Majestic and MCP connections
- your data
- Local SQLite WAL project files (.seoproject), optionally AES-256-GCM encrypted; exports include Excel, CSV, JSON, XML, HTML, sitemaps, Google Sheets and BigQuery
- checked
- 2026-08-11
- 05
Crawly
freeproprietary, freeLocalA free Mac crawler that turns nineteen issue types into a clean findings list and keeps crawl diffs.
The catch vs SitebulbIts nineteen checks and simple findings list are much narrower than Sitebulb's visual hints, prioritization and evidence-rich reporting.
Install, platforms & data +
- platforms
- desktopone-click install
- install
- Download and install the native universal macOS app
- setup
- macOS only
- engines
- A local MCP server connects to Claude Code, Cursor, Codex, Windsurf and other MCP clients
- your data
- Crawl projects and history live in a local SQLite database on the Mac; there is no hosted account or cloud sync
- checked
- 2026-08-11
Frequently Asked Questions
Direct answers · Sitebulb open-source replacements
What is the best free alternative to Sitebulb?+
The top free alternative to Sitebulb is SiteOne Crawler (open source, MIT). Crawls locally, calculates a quality score and tells you what to fix first; almost suspiciously on brief. Other popular Sitebulb replacements include LibreCrawl, SEOnaut, FreeCrawl.
Can I self-host a free replacement for Sitebulb?+
Yes. Of the 5 free alternatives to Sitebulb, 2 can be self-hosted on your own server or local machine: LibreCrawl (MIT), SEOnaut (MIT).
How much does switching from Sitebulb to a free alternative save?+
Sitebulb starts at $18/month per seat ($216/year). Switching a 5-person team to a free alternative like SiteOne Crawler saves $1,080 per year in software subscription fees.
Should I vibe-code or build my own Sitebulb clone from scratch?+
Our build verdict for Sitebulb is KINDA (the core, yes. the polish, no). The core loop is buildable, but a dependable replacement becomes a real weekend or multi-day project. For Sitebulb, crawl an owned site and turn technical findings into prioritized, evidenced hints. The hard boundary is rule depth, visualization, reporting, javascript crawling, and agency workflow, plus crawl scale, rule depth, and operational polish.
What is the catch when switching from Sitebulb to SiteOne Crawler?+
Its fix-first scoring is useful, but its prioritization and guided evidence are less polished than Sitebulb's.
