I'm looking for a support/sales chat bot powered by A.I. and natural language.

Without more detail it is hard to make a good recommendation. Since I don’t know your exact needs I will share the best AI based chat tool I have seen. It is offered by a company called NextIT. You can see it in use at goarmy.com. If navigate there and chat with Sgt. Star you can ask him just about anything you can think of and you will get a good and accurate response.

The problem with having a plugin AI system is that It will be very generic and might not cover the area of interest that you are working on.
Good news is that all pretrained models can be trained specifically for one's use case, but to achieve a good accuracy one will need a lot of data which can either be generated or gathered.
Once the data is in place and selection of pre-trained model has been made, it is just matter of time before you can have a good - great system working for you.
One can keep training the system every time it the system runs into a dead end to make it more robust and aligned to the task at hand.

Let me know if you'd like a detailed orientation on the above approach.

regards,
Deepesh

If you’re looking for a plug‑and‑play AI chatbot that you can train with your own productinfo and embed on your site (just like Olark), here are some excellent startups and tools that fit the bill:

1. ChatPress.ai
A ChatGPT-powered WordPress/WooCommerce chatbot plugin. You install it, link your content or product pages, and it responds based on your data. Easy setup, data stays in your environment, pricing from $19/month .

2. ChatLab
An AI chatbot plugin for WordPress & WooCommerce. Allows training on your website and product catalog, supports live-chat fallback, lead capture, and multilingual support. API-based—requires creating your bot at ChatLab.com

3. Support AI
WordPress plugin that creates custom chatbots trained with your site content. Handles support, sales, recommendations, feedback—requires dashboard setup at SupportAI.com

4. BotPenguin
A versatile chatbot platform (plugin for WordPress, Shopify, custom sites). You can scrape your website for FAQ/product pages, train the bot, enable live‑chat handoff, payments, CRM integrations. Free version available.

5. AI Engine / AI Power / WPBot (ThemeIsle Top 4)
All are WordPress plugins that leverage OpenAI models and let you train on your own content (including WooCommerce products). Pricing starts at $49 for Pro versions.

6. REVE Chat
Hybrid LLM + rule-based chatbot plugin for WordPress. You train on your website content, and get rich interactive chat widgets and sentiment-aware responses.

7. Docket
A startup offering an AI “sales engineer” and “AI seller.” It powers a conversational interface to engage website visitors, automatically providing technical or product answers, supporting pipeline growth—designed to plug into websites.

8. Alta & Conversica
Alta builds AI agents for automating sales prospecting, outreach, meeting scheduling—integrating with CRMs like HubSpot/Salesforce

Conversica offers virtual sales or customer success assistants via email, chat, and SMS, integrated into websites and CRMs