Every option in the catalog for when you need to put an AI sidebar on every website you visit — 8 AI browser extensions, 8 of them free or freemium, with the pricing tier printed on every row.
Flocci AI Tools lists 8 of them, ordered free tiers first: Opera Browser AI (Aria), Brave Leo, Dia, Harpa AI and MaxAI.me. Every one of them is free or has a free tier. Each entry states what it uniquely does rather than a score.
1 on this page are marked fully free with no paid plan at all: Opera Browser AI (Aria). The remaining 7 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up.
Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else.
| Tool | Pricing | Type | Listed for |
|---|---|---|---|
| Opera Browser AI (Aria) | Free | Browser Extensions & Copilots | Free, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed |
| Brave Leo | Freemium | Browser Extensions & Copilots | Built directly into the Brave browser sidebar — no separate site, no account, no signup required for free tier |
| Dia | Freemium | Browser Extensions & Copilots | AI-native Chromium browser (from the makers of Arc) with AI chat built into every tab, not bolted on as a sidebar |
| Harpa AI | Freemium | Browser Extensions & Copilots | AI web automation and monitoring |
| MaxAI.me | Freemium | Browser Extensions & Copilots | One-click rewrite, reply and summarize |
| Merlin AI | Freemium | Browser Extensions & Copilots | Works on any website |
| Monica | Freemium | Browser Extensions & Copilots | All-in-one AI copilot for the browser |
| Sider | Freemium | Browser Extensions & Copilots | ChatGPT/Claude/Gemini in a browser sidebar |