Most alternatives store your notes on their servers — or, at best, on a server you have to run yourself. That's not the only difference.
The question that ends most comparisons for confidentiality-bound professionals: can the company read what you wrote? For every tool below except WhosWhoZoo and Monica self-hosted, the answer is yes. Not because they're careless — because their architecture requires it.
WhosWhoZoo$39 once
ChatGPT memoryFree / $20/mo Plus
Where WhosWhoZoo loses
Honest tradeoffs. Choose the tool that fits your actual priorities.
Setup takes real effort
You need Cloudflare, Anthropic, and OpenAI accounts. The installer walks you through it, but it's ~20 minutes, not 2. Those 20 minutes buy you API-key privacy, memory you explicitly approved, and notes that survive the app. ChatGPT memory is zero minutes — but so is your control over what it remembers.
No automatic enrichment
Dex and Clay pull LinkedIn, Twitter, and email data automatically. WhosWhoZoo doesn't — you write what goes in. That's the privacy model, but if passive enrichment is your priority, Dex is better at it.
Not in the App Store
Add WhosWhoZoo to your home screen from Safari or Chrome and it works exactly like a native app — your own icon, full screen, voice mode, handsfree sessions, everything. What you don't get is App Store discovery or automatic system updates. ChatGPT has a polished App Store presence if that distribution matters to you.
Solo developer project
There's one person building this. No team, no enterprise SLA, no 24/7 support desk. The flip side: if Hans disappears, your notes don't — they're in your own Cloudflare account. The tool's survival is structurally irrelevant to your data.
You manage the API bill
Anthropic, OpenAI, and ElevenLabs bill your accounts directly. At normal use it runs $1–3/month, but it's variable. Monica cloud and Dex have predictable flat monthly fees.
Monica for non-technical self-hosters
If you want self-hosted but don't need AI, Monica is mature, open source, and free. It handles contacts and reminders well. It just doesn't answer questions conversationally.
Pricing as of July 2026. Competitor pricing changes often — verify before purchasing.
¹ ChatGPT consumer accounts (free and Plus) may use conversations to improve OpenAI's models by default. Opt out under Settings → Data Controls → Improve the model for everyone. This does not apply to the OpenAI API, which is how WhosWhoZoo reaches Anthropic and OpenAI — API traffic is not used for training.
Dex and Mem.ai storing data on their servers is not a criticism — it's how subscription web apps work. It only matters if cloud storage of your notes is professionally or personally disqualifying for you.