LetAnAgentAll scenariosRun a side hustle's admin (emails, quotes, invoices, socials): which AI agent to use
Researched, hands-on test pending
Our top pick: ChatGPT Go. This write-up is based on research from public sources; we haven't tested it hands-on yet and will update this page when we do. Prices were checked on 31 October 2026 and can change.
Top pick: ChatGPT Go
- Official site: chatgpt.com/pricing/
- What it does: Drafts customer emails, quotes and social posts, and tidies spreadsheets. Go raises Free's limits on uploads, images and data analysis, and adds projects and custom GPTs.
- Rough UK price: £7/month on the web (£6.99 in the iPhone app), monthly only
- Free tier: Free plan covers light use.
- UK caveats: Don't rely on it for tax. Check HMRC guidance or an accountant for self-assessment and Making Tax Digital.
- Don't use it if you are: Businesses handling sensitive client data who need a proper data agreement.
Alternative: Microsoft 365 Personal with Copilot
- Official site: www.microsoft.com/en-gb/microsoft-365/buy/compare-all-microsoft-365-products
- What it does: Copilot inside Word, Excel, Outlook and PowerPoint, plus 1 TB of OneDrive storage.
- Rough UK price: £8.49/month or £84.99/year
- Free tier: Trial offers vary.
- UK caveats: It's a personal plan; business plans with Copilot cost more.
- Don't use it if you are: Anyone happy in Google Docs.
Sources
- https://dev.to/theaitill/chatgpt-go-uk-price-ps7-a-month-go-vs-free-vs-plus-2026-5h74
- https://www.microsoft.com/en-gb/microsoft-365/buy/compare-all-microsoft-365-products
No paid placements. Spotted something out of date? Email hello@letanagent.com.