Almost every AI Chrome extension on the store in 2026 ships with the same default: broad host permissions, server-side conversation storage, and analytics that fire on pages you never asked the assistant about. That is not a moral failing — it is the engineering trade most chat sidebars and automation runtimes need to make to deliver their core feature. But it leaves a real gap for users on regulated machines, in sensitive industries, or who simply do not want every tab observed. This post is the short list of extensions that take the narrower path — and the honest accounting of what each gives up to be on it.
What “privacy-first” actually means
The phrase is overloaded. To stay honest, this post uses it strictly: an AI Chrome extension is “privacy-first” if it can be installed on a corporate or sensitive-data machine without the security team having to swallow any of the following:
- Background page reading. The extension cannot observe pages you did not explicitly invoke it on. In practice this means an activeTab-style permission model rather than a broad-host model — or a configurable mode that effectively delivers the same.
- Server-side conversation history by default. Either the extension stores nothing server-side, or it stores only with opt-in, with a clear retention window, and with deletion that actually deletes.
- Training on user inputs. The extension’s processor (the LLM vendor it routes to) is configured for no-train processing, and that is documented.
That is a high bar. As of August 2026, the number of widely-used AI Chrome extensions that clear it cleanly is small. Six is roughly the upper bound; several of the six only qualify with specific settings flipped. We name them honestly.
The six extensions that pass the bar
| Extension | Permission scope | Memory | Trade-off |
|---|---|---|---|
| Clicky | activeTab only (on-press) | Session-only, in-tab | No long-form chat, no sidebar |
| DDG Privacy Essentials + AI Chat | Anonymized request proxy | Per-conversation only | Limited model choice, no in-page actions |
| Brave Leo (Chrome bridge) | On-tab only when invoked | Local by default | Native to Brave; Chrome use is indirect |
| Kagi Assistant | Per-tab activation | Account-tied, deletable, no train | Paid only; no free tier |
| Wiseone (strict local) | On-page reading only | Local-first when configured | Reading-aid niche; not for navigation |
| Perplexity Companion (read-only) | Page selection only | Account-tied, deletable | No automation, narrow features |
Permissions and memory behaviour read from each vendor’s Chrome Web Store listing, privacy policy, and product documentation in August 2026. Several entries qualify only with specific settings enabled (called out in their section).
How we filtered
Three filters, applied in order:
- Permission scope. The extension cannot default to “read and change your data on all websites” without an opt-in user gesture. Either activeTab-only or a configurable mode that produces equivalent behaviour.
- Documented data retention. The privacy policy names the LLM vendor, the retention window, and the deletion path. “We may retain your data” clauses without specifics fail the filter.
- No-train commitment. Either the extension does not send inputs to the model vendor for training, or it documents a clear opt-out and the default is opt-out.
Many popular AI Chrome extensions fail filter #1 by design. That is not a smear — it means they are in a different category. We mapped the broader landscape in Best AI Chrome Extensions for SaaS Workflows (2026); this post is the privacy-shaped subset.
1. Clicky — activeTab + session-only
Disclosure: we make Clicky. The product was designed inside the privacy-first envelope from day one, which is why it can sit at #1 on this list without exception clauses.
Clicky requests the activeTab permission only — fired strictly when the user holds the Alt key on a tab they are actively looking at. It cannot read pages in the background. It cannot wake on the next tab you open. There is no server-side conversation store; memory is in-tab and gone when the tab closes. The model vendor (Anthropic Claude Haiku 4.5 free / Sonnet 4.6 paid) processes inputs without training. Voice output uses ElevenLabs; the audio is generated and discarded.
The trade is real: there is no chat sidebar, no cross-session memory, no model picker, no image generation, no automation. We covered the shape in What Is an Agentic Browser Assistant? and the privacy framework in Chrome Extensions That Do Not Track You.
2. DuckDuckGo Privacy Essentials + AI Chat
DuckDuckGo’s AI Chat is anonymized at the network layer: the company strips identifying metadata and forwards your prompt to GPT, Claude, or one of a handful of other models without ever associating it with your account. Conversations are not retained beyond the session, and DuckDuckGo’s contractual commitments with model vendors prohibit training on the relayed inputs.
It is on this list because the network-level anonymization plus no-store posture is genuinely strong. The trade-off is that you are using DuckDuckGo’s chosen model lineup, the assistant does not act on the page (it is a chat interface, not an in-page assistant), and the integration with Chrome is via the broader Privacy Essentials extension rather than a dedicated sidebar.
3. Brave Leo (when used as the Chrome bridge)
Brave’s built-in Leo assistant is, by Brave’s policy, queries-not-stored, no-training, and operates with on-tab activation. It is on this list with an asterisk: Leo is a Brave-browser feature, not a Chrome extension, and the only way to use it from Chrome is via Brave-as-a-bridge or by switching browsers. For users who can move their privacy-sensitive browsing to Brave, Leo is one of the cleanest privacy postures in the AI assistant category.
We include it because the question “what is the most privacy-respecting AI assistant I can use in a browser” should not pretend Brave does not exist. If Chrome is non-negotiable, this slot is effectively unavailable to you.
4. Kagi Assistant (paid, on Chrome)
Kagi’s Assistant ships as a feature of the paid Kagi search subscription and is accessible in Chrome via the Kagi extension. The privacy posture is the firmest of the paid options: account-tied conversations that you can list and delete, contractual no-training with the model vendors Kagi routes to, and per-tab activation rather than background reading.
The trade-off is the price floor — there is no free tier — and the narrower assistant feature set compared to Monica or Sider. For users who are already paying for Kagi search and want the AI piece in the same trust envelope, it is the obvious pick.
5. Wiseone (with strict local mode)
Wiseone is built for reading articles, not operating SaaS dashboards. We include it because its strict local-reading mode keeps the document on the client and only routes specific definitions and citations to its backend. With that mode on, the privacy footprint is small enough for sensitive documentation reading. With it off, Wiseone behaves like any other broad-permission sidebar; we are recommending it only in the configured-strict shape.
Trade-off: it is a niche tool. It will not help you operate a complex CRM. It will help you read dense product documentation, legal terms, or research papers without piping the entire content through a server.
6. Perplexity Companion (read-only)
Perplexity’s Chrome companion, used in its read-only mode (page selection + ask-about-this-page), is account-tied with deletable history and no-train defaults. It is on this list with the smallest margin because Perplexity’s broader product moves quickly and the agentic Comet browser is a separate, broader-permission tool we covered in ChatGPT Atlas & Perplexity Comet vs a Plain Extension. The Companion extension, used in its narrow mode, qualifies; the Comet browser does not.
What each one gives up to be on this list
The honest version: every extension on this list pays for its privacy posture by giving up something popular. Naming the trade explicitly:
- Clicky gives up the chat sidebar entirely. No long-form drafting, no model picker, no automation. The trade buys activeTab-only and session-only memory.
- DuckDuckGo gives up in-page actions. It is a chat interface; it does not modify the page you are on. The trade buys network-level anonymization.
- Brave Leo gives up Chrome itself — it is a Brave browser feature. The trade buys deep no-store integration.
- Kagi Assistant gives up the free tier. The trade buys the firmest paid privacy contract in the category.
- Wiseone (strict) gives up most features available in its non-strict mode. The trade buys local-first reading.
- Perplexity Companion (read-only) gives up the agentic browser experience that is Perplexity’s flagship. The trade buys a narrow, deletable footprint.
Five-minute audit checklist
Before installing any AI extension on a machine you care about, whether or not it is on a list like this:
- Open the Chrome Web Store listing. Read the permission line verbatim. If it says “Read and change your data on all websites,” the extension is in the broad-host category — it may still be a great product, but it is not in the privacy-first envelope.
- Open the privacy policy. Find the names of every third party the prompt touches: model vendor, voice/TTS vendor, analytics, error monitoring. If any of these are missing, treat the policy as incomplete.
- Check retention. “We retain conversations to improve the service” without a duration is too vague. Look for explicit windows.
- Check the training clause. The default should be opt-out. If opt-out is buried or absent, that is a signal.
- After install, go to
chrome://extensions, open the extension’s Site access setting, and switch to “On click” for any extension that does not strictly need background access. Treat broad host access as a per-site grant to be earned, not a default to be tolerated.
That checklist is the same one we recommended in Chrome Manifest V3 and AI Extensions; it is the most useful five minutes you can spend on extension hygiene.
Frequently asked questions
Why are so many popular AI extensions missing from this list?
Most popular AI Chrome extensions in 2026 (Monica, MaxAI, Merlin, Sider, HARPA, etc.) deliver their value through broad host permissions, server-side conversation history, or both. They are not failing at privacy; they are operating in a different category. The right comparison is in Best AI Chrome Extensions for SaaS Workflows; this list is the orthogonal cut.
Is a privacy-first extension less capable?
On the dimensions that matter for sensitive work, no — it is more capable, because security and compliance teams will sign off. On the dimensions of breadth (model variety, image generation, long-form chat), yes — those features are mostly traded away to keep the permission and storage surface small. Pick by the work, not the feature count.
Can I run a privacy-first extension and a sidebar extension together?
Yes, with discipline. Install the privacy-first extension globally and disable the sidebar extension on sensitive sites using Chrome’s per-site Site access controls. That gives you the sidebar where it is useful and rules it out where it is risky.
What about EU GDPR specifically?
For GDPR-bound deployments, the relevant questions are: where is the model vendor located, which sub-processors are involved, and does the extension have a DPA on file. Of the six extensions on this list, the ones with EU-friendly contractual posture in 2026 are Clicky (Anthropic + EU residency on paid tiers), DuckDuckGo (proxy model with documented sub-processors), and Kagi (paid DPA available). The others vary by configuration.
Part of our push-to-talk & privacy series. See also Chrome Extensions That Do Not Track You and Chrome Manifest V3 and AI Extensions.