sig.ai
BrandsRankingsCompare
Sign inStart Free Trial
Sign inStart Free Trial
HomeAI RankingsAI Assistant

Best AI Assistant Tools

4 brands ranked by AI visibility — how often they appear in AI answers across ChatGPT, Claude, Gemini, and Perplexity.

4
Brands tracked
90.8
Avg AI Score
97
Top Score
#1
A
ChatGPTLeader

ChatGPT surpassed 400M weekly active users in February 2025 and launched GPT-4o with voice, image, a

97
AI Score
#2
A
ClaudeLeader

Claude 3.5 Sonnet topped coding and reasoning benchmarks in 2024; Claude 3.7 Sonnet with extended th

95
AI Score
#3
A
GrokChallenger

AI assistant by xAI (Elon Musk); Grok 3 topped reasoning benchmarks in Feb 2025; 1M+ paying subscrib

93
AI Score
#4
B
Google GeminiLeader

Google Gemini 2.0 Flash launched January 2025 with multimodal live API; integrated into Android, Gma

78
AI Score

Compare Top AI Assistant Tools

ChatGPT vs ClaudeChatGPT vs GrokClaude vs GrokClaude vs Google GeminiGrok vs Google Gemini

Track Your AI Visibility in AI Assistant

See exactly how often your brand appears in AI answers and benchmark against competitors.

Start Free Tracking →

Stay in the loop

Get weekly insights on AI visibility and brand intelligence

sig.aiAI-Powered Brand Intelligence

Track how AI systems like ChatGPT, Claude, and Gemini mention your brand. Search, compare, and monitor AI-generated answers across a growing brand intelligence database.

Explore

  • Brands
  • AI Rankings
  • Compare
  • Trending
  • Activity Feed
  • What's New
  • Tech Jobs
  • Best-of Lists

Learn

  • Methodology
  • Blog
  • Learn Hub
  • What is AEO

Developers

  • API & SDK
  • MCP Server
  • OpenClaw Plugin
  • OpenAPI Spec
  • llms.txt

Company

  • About
  • Contact
  • Privacy
  • Terms

© 2026 sig.ai. All rights reserved.

PrivacyTermsSupport