Screaming Frog SEO Spider costs $23.55/mo.
These cost $0.
6 free alternatives to Screaming Frog SEO Spider, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
Screaming Frog SEO Spider vs Free Alternatives Matrix
Quick side-by-side comparison · $0/mo vs $23.55/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| SiteOne Crawler | open source | MIT | Local | ★ 841 | Screaming Frog SEO Spider vs SiteOne Crawler → |
| LibreCrawl | open source | MIT | Self-host | ★ 827 | Screaming Frog SEO Spider vs LibreCrawl → |
| SEOnaut | open source | MIT | Self-host | ★ 751 | Screaming Frog SEO Spider vs SEOnaut → |
| FreeCrawl | open source | MIT | Local | ★ 87 | Screaming Frog SEO Spider vs FreeCrawl → |
| Crawly | free | proprietary, free | Local | ★ $0 forever | Screaming Frog SEO Spider vs Crawly → |
| Screaming Frog SEO Spider Free | free | proprietary, free | Local | ★ $0 forever | Screaming Frog SEO Spider vs Screaming Frog SEO Spider Free → |
The picks
4 open source · 2 free to use · ranked by fit
- 01
SiteOne Crawler
open sourceMITLocal841jun 2026A proper cross-platform crawler with JavaScript rendering, reports and raw exports; no license key hiding under the lily pad.
The catch vs Screaming Frog SEO SpiderIt covers the common audit job, but it still has fewer deeply mature crawl controls, custom extraction workflows and integrations than Screaming Frog.
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 2026An unlimited browser-based crawler with JavaScript rendering; free, capable and one Docker stack away from useful.
The catch vs Screaming Frog SEO SpiderIt requires a Docker or Python and Playwright stack and offers less advanced crawl configuration, exports and integrations.
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 2026A workmanlike crawler with issue severity, audit history and exports; less microscope, more dependable checklist.
The catch vs Screaming Frog SEO SpiderIt is a dependable checklist crawler but gives up Screaming Frog's raw-data depth, granular configuration, extraction and integration breadth.
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 finished desktop crawler with 200 checks, JavaScript rendering, projects and exports; unusually close to the actual frog.
The catch vs Screaming Frog SEO SpiderIt is less battle-tested and has fewer mature configuration, extraction and integration workflows than Screaming Frog.
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, freeLocalUnlimited local crawling, JavaScript rendering and crawl diffs in a native Mac app; other operating systems get nothing.
The catch vs Screaming Frog SEO SpiderIt is macOS-only, lacks JavaScript rendering and offers far fewer crawl controls, extraction options, reports and integrations than Screaming Frog.
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
- 06
Screaming Frog SEO Spider Free
freeproprietary, freeLocalThe same frog, permanently free for 500 URLs; JavaScript rendering, saved crawls and scheduling stay licensed.
The catch vs Screaming Frog SEO SpiderThe permanent free edition stops at 500 URLs and withholds JavaScript rendering, saved crawls, scheduling, custom extraction and API integrations.
Install, platforms & data +
- platforms
- desktopclione-click install
- install
- Native Windows, macOS or Linux installer
- your data
- Crawl data lives in the local running session and can be exported to spreadsheets; the free edition cannot save and reopen crawl projects
- checked
- 2026-08-11
Frequently Asked Questions
Direct answers · Screaming Frog SEO Spider open-source replacements
What is the best free alternative to Screaming Frog SEO Spider?+
The top free alternative to Screaming Frog SEO Spider is SiteOne Crawler (open source, MIT). A proper cross-platform crawler with JavaScript rendering, reports and raw exports; no license key hiding under the lily pad. Other popular Screaming Frog SEO Spider replacements include LibreCrawl, SEOnaut, FreeCrawl.
Can I self-host a free replacement for Screaming Frog SEO Spider?+
Yes. Of the 6 free alternatives to Screaming Frog SEO Spider, 2 can be self-hosted on your own server or local machine: LibreCrawl (MIT), SEOnaut (MIT).
How much does switching from Screaming Frog SEO Spider to a free alternative save?+
Screaming Frog SEO Spider starts at $23.55/month per seat ($283/year). Switching a 5-person team to a free alternative like SiteOne Crawler saves $1,413 per year in software subscription fees.
Should I vibe-code or build my own Screaming Frog SEO Spider clone from scratch?+
Our build verdict for Screaming Frog SEO Spider is YES (the core loop fits in a weekend). The core loop is small enough for a capable coding agent to produce a useful local version in one sitting. For Screaming Frog SEO Spider, crawl an owned site locally, inspect technical signals, and export raw audit data. The hard boundary is years of crawl edge cases, javascript rendering, integrations, and desktop performance, plus crawl scale, rule depth, and operational polish.
What is the catch when switching from Screaming Frog SEO Spider to SiteOne Crawler?+
It covers the common audit job, but it still has fewer deeply mature crawl controls, custom extraction workflows and integrations than Screaming Frog.
