Nav0 vs Comet Browser: Two Privacy Browsers, Different Trust Models

By Nav0 Team · April 4, 2026 · 8 min read

Comet Browser and Nav0 appear to occupy the same niche. Both position themselves as fast, privacy-focused alternatives to mainstream browsers. Both promise a cleaner browsing experience without the feature creep of Chrome, Edge, or Brave.

But promises aren't proof. What matters is what's behind them: is the code open source? What data does the browser collect? Who controls it? What's the business model? When you look past the marketing, these two browsers make very different choices.

Nav0 vs Comet Browser: Quick Comparison

Feature	Nav0	Comet Browser
Open source	Yes (MIT license)	No (closed source)
Telemetry	Verifiably zero	Unverifiable (closed source)
Privacy claims	Provable in code	Requires trust
Engine	Chromium (via Electron)	Chromium
Ad blocker	Built-in (EasyList, EasyPrivacy, Peter Lowe)	Unknown implementation
Published benchmarks	Yes (48.5% less memory vs Chrome)	No public benchmarks
Community development	Public GitHub (issues, PRs, discussions)	Closed development
License	MIT (free to inspect, modify, redistribute)	Proprietary
Data storage	Local SQLite + electron-store (auditable schemas)	Unknown
Business model	None	Unknown
Feature set	Tabs, bookmarks, history, downloads, ad blocker, reader mode, PDF viewer	Unverified specifics (closed source)

The Open Source Question

Nav0 is fully open source under the MIT license. Every line of code — every IPC channel, every database query, every network request — is publicly auditable on GitHub. When Nav0 claims it collects zero data, you don't have to take anyone's word for it. You can read the source, build it yourself, and verify every claim.

Comet Browser is closed source. You cannot audit its code. You cannot verify what data it collects, what network requests it makes, or what it does with your browsing information. Every privacy claim Comet makes must be taken on trust.

This is the most important difference between the two browsers, and it overshadows everything else. In the privacy software space, closed source means "trust me." Open source means "verify it yourself." These are fundamentally different propositions.

We've seen repeatedly what happens when closed-source software makes privacy promises. Companies change their policies. Acquisitions happen. Revenue pressures mount. A product that respects your privacy today may not tomorrow — and if you can't read the code, you won't know until someone discovers the change.

Nav0's code is the proof. Comet's word is the proof. One of these is more durable than the other.

Feature Sets

Both browsers avoid the bloat of mainstream alternatives. Neither includes a crypto wallet, AI assistant, news feed, or VPN upsell. In a market where browsers compete to add features, both Nav0 and Comet focus on browsing. That shared instinct is worth respecting.

Nav0's feature set includes:

• Tabs and tab management
• Bookmarks
• Browsing history
• Downloads manager
• Built-in ad blocker (EasyList, EasyPrivacy, Peter Lowe's list)
• Reader mode
• PDF viewer
• Find in page
• Command palette
• Private browsing with separate, ephemeral database

Every feature exists because it serves the core function of browsing the web. Nothing exists for engagement, monetization, or ecosystem lock-in.

Comet Browser offers a similarly focused experience. It emphasizes speed and a clean interface. But without source code access, it's impossible to make a complete and verified comparison of what each browser actually does under the hood.

Privacy Architecture

Nav0's privacy approach is architectural, not behavioral. It's not that Nav0 promises not to collect your data — it's that the code doesn't contain data collection mechanisms. There are no telemetry endpoints. No analytics frameworks. No unique identifiers sent to any server. No phone-home behavior of any kind.

Nav0 uses a dual database system: one SQLite database for normal browsing and a separate one for private browsing. The private database is deleted entirely when you close the private window. Both databases are local-only — no cloud sync, no server-side storage, no data leaving your device.

Without access to Comet Browser's source code, we can't make equivalent claims about its privacy architecture. Comet may be equally private. It may collect some data. It may have telemetry. We simply don't know, and neither do you. That's the problem with closed source — not that the software is necessarily bad, but that its privacy properties are unverifiable.

The Engine Under the Hood

Nav0 is built on Electron, using Chromium's rendering engine through Electron's framework. This gives Nav0 excellent web compatibility — sites render the same way they do in Chrome. Electron also provides the multi-process architecture that keeps the browser stable: a crash in one tab doesn't bring down the whole browser.

Comet Browser is built on Chromium as well. Most independent browsers are, because Chromium's rendering engine is the de facto standard for web compatibility. But the way each browser customizes Chromium matters. The patches applied, the features removed, the Google services disabled (or not) — these details determine the actual privacy and performance characteristics.

With Nav0, you can inspect exactly which Chromium features are used and how. With Comet, you're relying on the developer's claims.

Performance Claims

Both browsers claim to be faster and lighter than mainstream alternatives. A browser without a news feed, AI assistant, crypto wallet, and shopping tool will naturally use fewer resources than one that has all of those. So the claim is plausible for both — the question is whether it's proven.

Nav0 has published benchmark data comparing its performance to Chrome, showing 48.5% less memory usage and 86.3% less CPU usage in controlled tests. The test methodology is documented, reproducible, and open to scrutiny.

Performance claims without published benchmarks and open methodology are marketing, not evidence. If Comet publishes equivalent benchmarks with reproducible methodology, that would strengthen their performance claims. Until then, both browsers are probably fast — but only one has public proof.

Data Storage

Nav0 stores all user data locally using better-sqlite3 (native SQLite bindings) and electron-store for key-value settings. The database schemas are defined in the source code. You can inspect exactly what Nav0 stores, how it stores it, and where it goes. The answer to "where" is always: your device, and nowhere else.

Nav0's storage model is deliberately simple:

• Bookmarks — URL, title, timestamp, stored in SQLite
• History — URL, title, visit timestamp, stored in SQLite
• Downloads — file info and status, stored in SQLite
• Settings — key-value pairs via electron-store
• Permissions — per-site permission decisions, stored in SQLite

No cloud. No sync. No accounts. No data export to any third party.

For Comet Browser, the data storage model isn't publicly documented at the code level. It likely stores similar data locally, but the specifics — encryption, retention, access patterns, any network transmission — can't be independently verified.

Community and Development

Nav0 is developed in the open on GitHub. Issues, pull requests, and discussions are public. Anyone can contribute code, report bugs, or propose features. The development roadmap is visible to everyone. This transparency extends the auditability beyond just the current code — you can see how decisions are made and why.

Open development also means open accountability. If Nav0 ever added telemetry, changed its privacy behavior, or made a questionable decision, the community would see it in a pull request before it shipped. There's no way to make a privacy-compromising change silently.

Closed-source development doesn't have this safeguard. Changes happen behind closed doors, and users discover them after the fact — if they discover them at all.

Who Each Browser Is For

Comet Browser may be a good choice if you want a fast, private browser and you trust the developer's claims without needing to verify them in source code. Some users don't care about auditability — they just want a clean browser that works. That's a valid preference.

Nav0 is for users who believe that privacy claims should be verifiable. It's for people who think a browser that collects zero data should be able to prove it in code. It's for anyone who wants the confidence that no business model, no acquisition, and no revenue pressure can compromise their browser's privacy — because the code is public and the community is watching.

What You Give Up

Choosing Nav0 over Comet Browser:

• Different platform support. Check each browser's platform availability for your OS.
• Extension compatibility. Neither browser supports Chrome extensions, but specific extension handling may vary.

Choosing Nav0 means gaining:

• Full source code transparency. Every claim is verifiable.
• Community-driven development. Public issues, PRs, and discussion.
• Guaranteed zero telemetry. Not just promised — provable.
• MIT license. Freedom to inspect, modify, and redistribute.

Frequently Asked Questions

Is Comet Browser open source?

No. Comet Browser is closed source. You cannot audit its code, verify its privacy claims, or inspect its network behavior. Nav0 is fully open source under the MIT license, meaning every line of code is publicly auditable on GitHub.

Which is more private, Nav0 or Comet Browser?

Nav0's privacy is verifiable — it's open source with zero telemetry provable in the code. Comet Browser's privacy claims cannot be independently verified because the source code is closed. In privacy software, verifiability matters more than promises. Nav0 offers provable, architectural privacy.

Is Nav0 faster than Comet Browser?

Nav0 has published benchmark data showing 48.5% less memory usage and 86.3% less CPU usage compared to Chrome. Comet Browser has not published equivalent reproducible benchmarks. Both are likely fast, but only Nav0 has public, verifiable performance data.

What is the best lightweight browser that doesn't track you?

Nav0 is a privacy-focused, open-source browser with verifiable zero telemetry. It's fully auditable under the MIT license, with no business model and no closed-source components. Unlike other lightweight browsers, Nav0's zero-data-collection claim is provable in the source code — not a marketing promise.

The Bottom Line

Nav0 and Comet Browser both reject the trend of browsers becoming bloated, data-hungry platforms. Both offer a simpler alternative. On the surface, they look similar.

The difference is trust model. Comet asks you to trust their claims. Nav0 asks you to verify them. In a world where every tech company promises to respect your privacy — and most of them break that promise when incentives change — verifiability isn't a nice-to-have. It's the only thing that matters.

Open source is good. Zero telemetry is better. Verifiable, zero-telemetry, open-source privacy is what Nav0 delivers.

Download Nav0 — open source, verifiably private, zero data collection.

---

Nav0 is a privacy-focused browser that collects zero data. It's open source, free, and built for people who believe their browser shouldn't spy on them. Get started.