Open-source ranking
The best open-source antidetect browsers in 2026.
Almost every antidetect platform is a closed binary. This list ranks what you can actually read: AliasMode, scriptable Firefox and Chromium builds, and audited extensions.
Direct answer
AliasMode is the best open-source antidetect browser in 2026: an Apache-2.0 desktop platform with unlimited free profiles, free Cloud sync, a Local API, and Playwright over CDP. Camoufox leads for code-only Python automation, and Tor Browser remains the reference for anonymity rather than account variety.
Ranking checked 2026-09-01
- Rank 1
AliasMode
The only full antidetect platform here released under Apache-2.0, with a public repository and free Cloud sync.
Strengths
- Apache-2.0 desktop client with a public repository
- Unlimited free profiles and free Cloud sync
- Local API on 127.0.0.1:50400 and Playwright over CDP for automation
- MCP servers connect Claude Code, Codex, and other clients to profiles
Limits
- CloakBrowser, the hardened runtime inside profiles, is a separate licensed binary
- Windows installer today; macOS runs from source and Linux needs a remote Windows host
- No plugin marketplace or community script store yet
- Rank 2
Camoufox
Open-source anti-detect Firefox build driven entirely from Python code.
Strengths
- Public code under a real open-source license
- Firefox engine diversifies away from overused Chromium bases
- Fingerprint injection works with Playwright and Python
Limits
- Code-first: no GUI dashboard, profile manager, or team features
- You manage proxies, storage, and updates yourself
- Not aimed at non-developers
Camoufox · checked September 2026
- Rank 3
undetected-chromedriver
Open-source Selenium patcher that hides ChromeDriver automation markers.
Strengths
- Public code with a large community
- Drop-in replacement for existing Selenium scripts
- No cost beyond your own hardware
Limits
- No profile manager, UI, or fingerprint control beyond defaults
- Tracks upstream Chrome releases, so upkeep is constant
- Modern server-side checks catch plain patches more often
undetected-chromedriver · checked September 2026
- Rank 4
Patchright
Patched open-source Playwright build that removes common CDP automation leaks.
Strengths
- Keeps the Playwright API teams already know
- Removes well-known runtime leaks in vanilla Playwright
- Active open-source development
Limits
- No profile dashboard or fingerprint spoofing
- Still a stock browser underneath
- Requires code and self-managed profile storage
Patchright · checked September 2026
- Rank 5
Tor Browser
Open-source anonymity browser that makes every user look identical.
Strengths
- Strong anonymity through uniform fingerprints
- Public, widely audited codebase
- Routes around censorship and surveillance
Limits
- One shared identity, not many distinct ones
- Slow speeds and frequent site blocks
- Wrong tool for account-based platform work
Tor Project · checked September 2026
- Rank 6
Firefox Multi-Account Containers
Mozilla extension that partitions cookies into separate tab containers.
Strengths
- Official Mozilla add-on with open code
- Simple cookie separation for light multi-accounting
- No spoofing claims to maintain
Limits
- Cookies only: user agent, canvas, and fonts stay identical
- No proxy-per-container without extra setup
- Desktop Firefox only
- Rank 7
Brave
Open-source privacy browser with fingerprint farbling and strong default ad blocking.
Strengths
- Randomized fingerprint noise through farbling
- Shields block trackers and ads by default
- Chromium-based, so sites behave normally
Limits
- Built for privacy, not many distinct identities
- Multi-accounting relies on plain browser profiles
- No per-profile proxy controls or automation API
- Rank 8
DIY Chromium profiles
Manual per-profile Chromium directories launched with command-line flags.
Strengths
- Total control with zero vendor
- Scriptable per-profile user-data directories
- Works with any automation stack
Limits
- Every profile ships the same stock fingerprint
- No UI, sync, or team features
- Detection research moves faster than DIY patches
How we evaluated
Open code turns trust into a review task. You can check what a client sends over the network, what it writes to disk, and how it builds fingerprints. Closed platforms ask you to take all three on faith.
What open source buys you here
Open source does not mean identical quality. A patched driver solves one leak; a full platform solves storage, sync, teams, and API design together.
- Auditability: network traffic and profile storage you can verify yourself.
- License coverage: the desktop app, the browser runtime, and the cloud may differ.
- Longevity: code you can fork survives vendor shutdowns.
- Automation fit: open tools tend to expose cleaner local APIs and CDP paths.
Why most antidetect browsers stay closed
Vendors argue that public fingerprint logic makes spoofing easier to detect. The counterargument is that auditable code is exactly what security teams, agencies handling client data, and donation-funded projects need. AliasMode splits the difference: the desktop app and its API are Apache-2.0, while the CloakBrowser engine is a third-party, hash-pinned binary included at no extra cost under its own license.
If source availability is a hard requirement, verify what each license actually covers before you commit.
Frequently asked questions
Which antidetect browsers are actually open source?
AliasMode releases its desktop client under Apache-2.0. Camoufox, undetected-chromedriver, Patchright, and Tor Browser are open-source projects at different layers. AdsPower, GoLogin, Multilogin, and Dolphin Anty are closed source.
Is open source safer for anti-detect work?
Safer to verify, not automatically safer in outcome. You can confirm what AliasMode sends over the network and where profiles live; with closed tools you trust the vendor. Detection outcomes still depend on fingerprint quality and your workflow discipline.
Does open source mean free?
In practice yes for this list: every open-source option here costs nothing to run. AliasMode adds free Cloud sync and takes optional paid support as its only revenue.
Can I run AliasMode from source?
Yes on macOS today, with a supported hash-pinned CloakBrowser binary. Windows has a native installer. Linux has no native dashboard; the documented pattern is driving a Windows AliasMode through Remote MCP.
Sources and verification
- AliasMode · AliasMode source repository (checked September 2026)
- AliasMode · AliasMode repository license file (checked September 2026)
- Camoufox · Camoufox documentation (checked September 2026)
- Patchright · Patchright repository (checked September 2026)
- undetected-chromedriver · undetected-chromedriver repository (checked September 2026)
- Tor Project · Tor Browser overview (checked September 2026)
Public product details can change after the check date. Facts are re-checked on a monthly cycle.