Mira vs Spider Cloud

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-10-18
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At a glance

DimensionMiraSpider Cloud
Primary FunctionSelf-hosted AI code review for GitHub PRsWeb crawling, scraping, and search API
PricingFree and open-source (self-hosted, pay only for LLM API costs)Freemium (usage-based, credits; free tier up to 1000 pages)
DeploymentSelf-hosted (Docker, requires own infrastructure)Cloud API (managed) + open-source self-host option
Key IntegrationsGitHub, OpenRouter, Slack, Teams, SQLite, PostgreSQLLangChain, LlamaIndex, CrewAI, Google Cloud Storage, Amazon S3, Supabase
Latest News Impactv0.4.0 adds exclude patterns for indexing, file-size limit, better error handling; v0.3.1 adds review reasoning effort settings and custom model registryBrowser AI commands (Act, Extract, Observe) via WebSocket + scraper catalog with 1000+ examples; data connectors to S3/GCS/Sheets/Azure Blob/Supabase
Best ForEngineering teams wanting private, customizable AI code review on GitHubAI agents and RAG pipelines needing real-time web data extraction
Try MiraTry Spider Cloud
Mira
Mira

Mira is a self-hosted, open-source AI code reviewer that indexes your whole repo and reviews pull requests with the LLM of your choice.

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Spider Cloud
Spider Cloud

Spider Cloud is a web scraping, crawling, and search API that streams live pages as markdown or JSON for AI agents and RAG pipelines.

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Pricing
Free
Freemium
Plans
$0/mo
$1/GB + $0.0001/CPU-min
From $6/mo
From $40/mo
Custom
Popularity
14 views
7.5k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebAPI
WebAPIPluginCLIDesktop
Categories
🔎 Code Review & Quality🔐 Application & Code Security
🌐 Web Scraping & Search APIs🖱️ Browser & Computer-Use Agents
Features
Full-repository indexing so every pull request review runs against whole-project context
Inline PR comments with severity sorting and confidence scoring
PR walkthroughs with Mermaid sequence diagrams
Blast-radius reporting with in-repo callers and cross-repo dependents
Cross-PR overlap detection for merge-conflict risk and duplicate effort
Deduplication of findings across chunks and files, plus per-PR comment caps
GitHub suggestion blocks for one-click applied fixes
Per-repo and global review rules defined in .mira.yaml
Learning loop that synthesizes rules from rejected comments and quarantines new ones
Layered security review with a dedicated security-model tier
Optional agentic read_file and grep_repo verification on indexed repositories
Deterministic regex-and-entropy secrets scan
Review-time OSV dependency checks plus OSV scanning tied to the codebase index
Org-wide package search across repositories
Optional AI-generated PR-description summaries
Scrape a single page into markdown, JSON, HTML, raw, or plain text
Crawl entire sites with each page streamed as one JSONL line in order as it finishes
Web search endpoint returns SERP results plus the scraped pages behind them
Custom browser renders like a user: scripts run, lazy images load, infinite scroll reaches the end
Load protected pages through a real browser engine with geo checks, returning a 200
Run full browser sessions over WebSocket with anti-detection and rotating exits
Send AI commands (Act, Extract, Observe) over the Browser API WebSocket
Send a prompt on a scrape or crawl request and get named fields back as JSON
Two-phase AI extraction: a fast model for most pages, a stronger model for complex layouts
Provider router sends scrape and crawl requests to outside providers on your own keys
Data connectors pipe crawl results into S3, GCS, Google Sheets, Azure Blob, or Supabase
Proxy network with 215M+ residential and ISP exits in 199 countries, rotated per request
MCP server at mcp.spider.cloud for Claude Code, Codex, Cursor, and Claude Desktop
1,000+ ready-made scraper examples across 32 categories, each with working code
API responses support JSON, JSONL, CSV, and XML; up to 10,000 core API requests per minute by default
Integrations
GitHub
GitLab
Forgejo
Codeberg
OpenRouter
Anthropic
OpenAI
Google
DeepSeek
Codex CLI
Docker
PostgreSQL
Railway
Fly.io
Render
LangChain
LlamaIndex
CrewAI
FlowiseAI
Langflow
Dify
Agno
MCP
Claude Code
Codex
Cursor
Claude Desktop
Amazon S3
Google Cloud Storage
Google Sheets

What real users say: Mira vs Spider Cloud

Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.

Mira

86 mentions across 6 sources · 40% positive — mixed (averaged across 6 sources)

Hacker News, YouTube, Product Hunt, App Store, GitHub, Lemmy

What users praise

  • • Full-repo indexing gives project-wide context, not just a diff.
  • • Bring-your-own-LLM: pay providers directly, no markup.
  • • Fully open-source and self-hosted; complete data control.
  • • Severity and confidence scoring helps triage review comments.

What frustrates them

  • • Setup requires Docker and DevOps knowledge; not turnkey.
  • • Documentation is sparse for advanced setups like Postgres.
  • • GitHub Actions integration requires manual webhook setup.
  • • Learning loop's quarantine can hide valid findings.

Researched Aug 27, 2026

Spider Cloud

No verifiable community signal. We scanned public discussion on Oct 14, 2026 and found posts matching the name “Spider Cloud”, but could not establish that they are about this product rather than something else sharing its name. Rather than publish a score built on the wrong subject, we publish none.

Who should pick which

  • Privacy-conscious engineering team using GitHub
    Pick: Mira

    Mira is self-hosted, so code never leaves your infrastructure. It's free and open-source, with full-repo indexing and custom rules, perfect for teams that cannot send code to third-party APIs.

  • AI agent developer needing real-time web data
    Pick: Spider Cloud

    Spider Cloud provides a fast web crawling API with AI extraction, Browser AI commands, and direct integrations with LangChain/LlamaIndex, ideal for RAG pipelines and agent tools.

  • Solo developer wanting free code review bot
    Pick: Mira

    Mira is free and open-source. You can deploy it yourself and use any LLM. It provides comprehensive PR reviews with vulnerability scanning, no paid tiers.

  • Team building a scraper catalog for e-commerce
    Pick: Spider Cloud

    Spider Cloud offers 1000+ ready-made scraper examples across 32 categories, plus data connectors to S3/Sheets. Its Rust engine handles high volume at low cost.

  • Organization needing dependency impact analysis
    Pick: Mira

    Mira's blast-radius analysis and dependency graph give insight into how symbol changes affect the codebase, essential for large repos.

Frequently Asked Questions

Can I use Mira without self-hosting?

No, Mira is self-hosted only. You must deploy it on your own infrastructure using Docker. There is no cloud SaaS version.

Does Spider Cloud support self-hosting?

Yes, Spider Cloud's core is open-source on GitHub and can be self-hosted. But the cloud API offers managed scalability and features like AI Studio.

What LLMs does Mira support?

Mira supports any LLM via OpenRouter, plus direct integrations with Anthropic, OpenAI, Google, DeepSeek, MiniMax. Custom models can be added via MIRA_MODELS_JSON_PATH.

Does Spider Cloud offer a free tier?

Yes, Spider Cloud provides 1000 free pages/month. After that, it's $0.003 per page, and failed requests are not billed.

Can Mira review PRs on GitLab or Bitbucket?

No, Mira currently supports GitHub only. It runs as a GitHub App.

What output formats does Spider Cloud support?

Spider Cloud outputs markdown, HTML, JSON, CSV, XML, and plain text. It also supports screenshot capture and link extraction.

Is Mira updated frequently?

Yes, recent updates include v0.4.0 (exclude patterns, file-size limit) and v0.3.1 (reasoning effort, custom models). The project is actively maintained.

Can Spider Cloud handle JavaScript-heavy sites?

Yes, Spider Cloud uses a Browser Cloud with stealth anti-detection and supports Browser AI commands to interact with dynamic content.

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Explore each tool further

Mira
View Mira reviewMira alternatives
Spider Cloud
View Spider Cloud reviewSpider Cloud alternatives

Browse these categories

Best AI Code Review & Quality toolsBest AI Web Scraping & Search APIs toolsBest AI Application & Code Security toolsBest AI Browser & Computer-Use Agents tools
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Last reviewed: July 3, 2026