AI Engine is our pick for anyone comfortable with an API key. It supports OpenAI, Anthropic, Google, Mistral, OpenRouter and more, has a 4.9 rating from about 900 reviews, and gets frequent updates. The free version alone includes chatbots and an MCP server.
Because you bring your own key, you pay the AI provider. A public chatbot with no usage limits (a Pro feature) can run up costs.
What AI Engine is
A multi-provider AI toolkit that adds chatbots, content and image generation, and an in-admin AI workspace to WordPress. It also turns the site into an MCP server so Claude, ChatGPT and coding agents can read and edit content, with undo and approval for deletions.
How it works with WordPress
Standalone plugin with its own admin (Meow Apps > AI Engine), chatbot block and shortcode, editor copilot, AI forms (Pro) and a built-in MCP server for external agents.
Key features
- Chatbots with five themes, popup/inline/fullscreen modes, file uploads, memory and realtime voice
- Multi-provider: OpenAI, Anthropic, Google Gemini, Mistral, Perplexity, OpenRouter, plus local models
- Built-in MCP server (140+ tools free, more with Pro and other Meow Apps plugins)
- Workspace: full-screen AI chat in wp-admin with iOS/Android apps
- Editor copilot for suggestions, rewrites and translation; AI Playground
- Pro: knowledge base/embeddings from site content and PDFs, function calling, AI Forms, usage insights and limits
- REST and internal APIs for developers
Pricing
| Plan | Price (USD) | What you get |
|---|---|---|
| Free | Free | Chatbots, content/image generation, Workspace, MCP server |
| Pro Starter | $59 / year | 1 website |
| Pro Standard | $79 / year | 5 websites |
| Pro Professional | $149 / year | 20 websites |
| Lifetime Standard | $299 / one-time | 1-5 websites |
| Lifetime Professional | $449 / one-time | 20 websites |
| Lifetime Developer | $599 / one-time | 500 websites |
| Lifetime Agency | $799 / one-time | 2,500 websites |
AI limits: No plugin-side quota; usage is billed by your AI provider. Pro lets you set guest/user/site-wide caps. MCP server has no account requirement or daily cap per Meow Apps.
Your own AI key: Yes (OpenAI, Anthropic, Google, Mistral, Perplexity, OpenRouter, local models)
Prices are as listed on the official pricing page in November 2026 and can change. Check the current pricing before you buy.
Pros and cons
Pros
- Very generous free version including chatbot and MCP server
- Works with most major AI providers and local models
- Frequent updates and high rating
- Agent edits can be undone for 30 days; deletions need approval
- Affordable Pro and lifetime licenses
Cons
- You must create and fund your own provider account(s)
- Large feature surface; settings can feel overwhelming for beginners
- Knowledge base, forms, function calling and usage limits are Pro-only
- Chatbot costs can grow with traffic unless you configure limits (Pro)
On WordPress.org: active installs: 90,000+, rating: 4.9/5 (98/100, 876 ratings), last updated: 2026-11-12, version: 3.9.4 (as shown in November 2026).
Who it's for
Good fit: Site owners and developers wanting a flexible chatbot and AI toolkit with their own API keys, or a free MCP bridge for Claude/ChatGPT.
Look elsewhere if: Users who want an all-inclusive AI subscription with no provider billing or setup.
Tutorials
- Connect Claude, ChatGPT or Cursor to WordPress with MCP
- Add an AI chatbot to WordPress with AI Engine (OpenAI or Claude)
Alternatives to AI Engine
FAQ
Is AI Engine free?
Yes. The free version includes chatbots, content and image generation, and an MCP server. Pro (from $59/year) adds knowledge bases, forms, function calling and usage limits.
Can AI Engine use Claude?
Yes. Add an Anthropic environment in AI Engine's settings with your Anthropic API key.