Big General Purpose Chatbots

ChatGPT (OpenAI): GPT‑4o and GPT‑5-based assistants for general chat, coding, writing, and multimodal tasks.
Claude (Anthropic): Claude 3 and 4.x models, focused on safer long-form writing, coding, and “agent” style workflows.
Google Gemini: Multimodal chatbot integrated with Google products and search.
Microsoft Copilot: Chatbot across Windows, Edge, Office, and web, using OpenAI models plus Microsoft tools.
Meta AI: LLaMA-based assistant available in Meta’s apps and via open-weight models.
Grok (xAI): Chatbot integrated with X (Twitter), with a more informal style and live-data focus.

Content, Coding and Work Assistants

Jasper: Writing-focused assistant for marketing and brand content.
Copy.ai, Writesonic/Chatsonic: Chat-style tools aimed at marketing, blogs, and SEO content.
GitHub Copilot: Coding assistant in editors and IDEs, chat-style suggestions and explanations.
Notion AI, Canva Magic Studio, Gamma: Embedded chat assistants inside productivity or design apps.

Region Specific and other LLM Chatbots

Ernie Bot (Baidu): China-focused LLM chatbot family (Ernie 4.5, Ernie X1, etc.).
DeepSeek, Pi (Inflection), Lindy, Character.AI: Other notable assistants with different specializations, from emotional support to automation agents.

Research and Search-focused Chatbots

Perplexity AI: Chat and search hybrid that answers with citations and web context.
You.com / YouChat: Chat-style interface combining web search and LLM answers.
Zapier Agents / Chatbots: Build custom chatbots that connect to apps and workflows.

AI Humanizers

Humanize AI or AI Humanizers refers to tools and techniques that make AI-Generated text sound more natural, conversational, and human-written, often by adding personal touches, varying sentence structure, and removing robotic patterns, primarily to bypass AI detectors and improve reader engagement.

Essentially, it's about taking sterile AI output and adding warmth, emotion, and authenticity, making it feel less machine-generated and more relatable for humans.

Examples:

HIX Bypass
Humbot
BypassGPT
PassMe AI
Undetectable.ai
Stealth Writer

Source: The 7 Best AI Humanizers in 2025