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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.

exa.ai logo
exa.ai
✓ verifiedFreemium

Search, crawling and research API built for AI agents, with token-efficient results and structured web-data enrichment.

761K visits/mo1.7K saves
DHTMLX Chatbot logo
DHTMLX Chatbot
✓ verifiedFree

Lightweight MIT-licensed JavaScript chatbot UI widget for building support-agent chat interfaces on top of any LLM.

92K visits/mo
NopeCHA logo
NopeCHA
✓ verifiedFreemium

An AI CAPTCHA-solving service via browser extension or API, supporting reCAPTCHA, hCaptcha, FunCaptcha and more for automation.

115K visits/mo
BlackBox AI logo
BlackBox AI
✓ verifiedFreemium

AI coding platform routing many agents and models through one encrypted, usage-based endpoint with CLI, IDE and multi-agent execution.

3.9M visits/mo
Google Opal logo
Google Opal
✓ verifiedFree

Google Labs experiment for building and sharing AI mini-apps from natural-language prompts, no coding required.

2.1M visits/mo
Pricing
Free: $0 (20,000 requests/mo)
Search: $7/1k requests
Contents: $1/1k pages
Deep Search: $12-15/1k requests
Monitors: $15/1k requests
Agent: $0.012-$1.00/run

No public pricing

Free: $0 (up to 100 solves/24h)
Starter: $4.99/mo (2,000 solves/day)
Basic: $19.99/mo (20,000 solves/day)
Professional: $49.99/mo (80,000 solves/day)
Pro: $10/mo
Pro Plus: $20/mo
Pro Max: $40/mo

No public pricing

Core features
  • Web search API tuned for agents
  • Full-page contents with token-efficient highlights
  • Asynchronous agents for deep research and enrichment
  • Structured outputs with grounded citations
  • Web monitors that track new events on a schedule
  • Zero data retention and SOC 2 Type II controls
  • MIT-licensed and free to use
  • Lightweight (~65kb) JavaScript widget
  • 4 message display modes plus typewriter effect
  • Markdown support and chat history
  • Backend hook to integrate any LLM
  • Responsive, mobile-friendly, read-only mode
  • AI CAPTCHA recognition (reCAPTCHA, hCaptcha, FunCaptcha, GeeTest, AWS WAF)
  • Chrome extension and Firefox add-on
  • Token and recognition APIs for browserless use
  • SDKs for Python and Node.js
  • Works with Selenium, Puppeteer and Playwright
  • Usage/activity monitoring dashboard
  • Unified encrypted inference endpoint
  • Multi-agent parallel execution
  • CLI, IDE, and API access
  • App builder and remote coding agents
  • Chairman LLM output evaluation
  • 35+ IDE integrations
  • Build AI mini-apps from natural-language prompts
  • Visual editor for prompt/tool workflows
  • Share created apps with others
  • No-code AI app prototyping
Use cases
  • Give coding agents current docs and repo context
  • Power chatbots with real-time web answers
  • Enrich company and people data at scale
  • Monitor the web for fresh events
  • Adding an AI chat UI to web apps
  • Building LLM-powered support agents
  • Embedding chat widgets in existing products
  • Prototyping chatbot interfaces
  • Automating CAPTCHA-gated web workflows
  • Bypassing bot checks in scraping and testing
  • Integrating CAPTCHA solving into scripts
  • Automating refactors, tests, and migrations
  • Running competing AI coding agents
  • Building apps from prompts
  • Integrating agents into CI/CD
  • Prototyping an AI workflow quickly
  • Sharing a custom AI mini-app
  • Automating a task with chained prompts
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