Popular AI Systems Pro pricing comparison shows most premium chatbots, including ChatGPT, Claude, Gemini, Perplexity, and Poe, charge about £16/month, while Grok is £13 and DeepSeek is cheaper at £4–8. Pi and Meta AI remain free. ChatGPT leads with the highest score (97), largest user base, and multi‑billion dollar revenue, followed by Claude and Gemini. Others remain less transparent on usage and earnings. More.
| Founded | CEO / Founder | Chatbot | UK Price (~£) | Score | 2024 Revenue (est) | Users (2025–26) | Support | Website |
|---|---|---|---|---|---|---|---|---|
| 2015 | Sam Altman | ChatGPT (OpenAI) Popular for Answer Engine Optimisation (AEO) |
~£16/mo | 97 | ~£3.0B (≈$3.7B) | ~400M MAUs / 20M paid | help.openai.com | chat.openai.com |
| 2021 | Dario Amodei | Claude (Anthropic) Strong contender in AI Search Optimisation |
~£16/mo | 94 | ~£680M (≈$850M) | ~18.9M MAUs | support.anthropic.com | claude.ai |
| 2010 | Demis Hassabis | Gemini (Google DeepMind) Used by agencies for Generative Engine SEO |
~£16/mo | 92 | Not publicly disclosed | ~47M active users | support.google.com | gemini.google.com |
| 2022 | Aravind Srinivas | Perplexity AI Increasingly used in AI consulting workflows |
~£16/mo | 91 | $148M annual recurring revenue (guestimate) | 22M monthly active users | help.perplexity.ai | perplexity.ai |
| 2022 | Mustafa Suleyman | Pi (Inflection AI) Free tool, useful in agency testing of AEO/SEO |
Free | 85 | Not publicly disclosed | 1M daily active users in 2024 | help.inflection.ai | pi.ai |
| 2023 | Mark Zuckerberg | Meta AI Experimenting with AI Engine Optimisation (GEO) |
Free | 87 | Not publicly disclosed | 1 billion monthly active users | help.meta.com | ai.meta.com |
| 2023 | Adam D’Angelo | Poe (Quora) Favoured by some AI SEO Agencies |
~£16/mo | 84 | Not publicly disclosed | 4 million monthly active users in the US | help.quora.com | poe.com |
| 2023 | Elon Musk | Grok (xAI) Marketed as an alternative AI Search Optimisation engine |
~£13/mo | 82 | Not publicly disclosed | 6.7 million people use Grok AI every single day. (REALLY 🙂 | help.twitter.com | x.ai |
| 2023 | DeepSeek Team | DeepSeek Low-cost option popular with AEO-focused startups |
~£4–8/mo | 80 | Not publicly disclosed | DeepSeek had 96.88 million monthly active users worldwide | FAQs deepseek.com | deepseek.com |
