AliasMode
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Donut Browser alternative

AliasMode vs Donut Browser: A Free Open-Source Alternative

Both apps are open source. The difference is the engine. AliasMode Firefox, the AliasMode antidetect engine, is public under MPL-2.0. Donut Browser runs Wayfern, a Chromium engine whose source is closed.

Download AliasMode freeSee the open engine

Facts last verified 2026-09-23. Official sources appear beside comparison rows.

Direct answer

Choose AliasMode if you want an antidetect browser you can fully audit: the app and the AliasMode Firefox engine are both open source, and MCP, scripts, the Local API, and Cloud sync are free. Choose Donut Browser if you need its WireGuard-per-profile support.

AliasMode vs Donut Browser

CriterionAliasModeDonut BrowserEvidence
Antidetect engine sourceAliasMode Firefox is open source under MPL-2.0, with every fingerprint patch public. Chromium profiles use CloakBrowser.Wayfern, a Chromium-based engine. The Donut Browser site describes it as proprietary and closed source.Donut Browser · checked September 2026
App sourceDesktop app, Local API, and MCP server are Apache-2.0.App is AGPL-3.0. Paid plans add a commercial license.Donut Browser · checked September 2026
PriceEvery feature is free with unlimited profiles, in Local and Cloud mode.Free tier with unlimited profiles. Paid tiers unlock automation APIs, MCP tooling, and encrypted cloud backup.Donut Browser · checked September 2026
AI agents and MCPLocal stdio MCP and Remote MCP for Claude, ChatGPT, and Codex are free.Remote MCP is part of the paid Pro tier.Donut Browser · checked September 2026
AutomationScripts in JavaScript or Python, the AliasMode Local API (AdsPower-compatible), and Playwright over CDP.Local REST API on the free tier; wider automation APIs on paid tiers.Donut Browser · checked September 2026
Teams and syncFree Cloud workspace with owner and member roles, device revocation, and Trash.Self-hostable encrypted sync. Team collaboration features are proprietary.Donut Browser · checked September 2026
PlatformsWindows installer, macOS app (Apple Silicon and Intel), and Linux x64 app. The AliasMode Firefox engine ships for Windows, macOS (Apple Silicon and Intel), and Linux.Native builds for macOS, Windows, and Linux.Donut Browser · checked September 2026

Who should choose each product?

Choose AliasMode when

  • You want an open-source antidetect engine, not only an open-source launcher.
  • You need MCP and automation without a paid plan.
  • You want free Cloud sync for a team.
  • You want Firefox and Chromium engines in one app.

Choose Donut Browser when

  • You want WireGuard VPN per profile.
  • You want to self-host sync.

Migration plan

Move one verified workflow at a time and keep the original data until every check passes.

  1. List your Donut Browser profiles, proxies, and groups.
  2. Export cookies and proxy details for each account you move.
  3. Create matching AliasMode profiles and choose AliasMode Firefox or Chromium per profile.
  4. Import the proxies, then sign in to each account again through its normal login.
  5. Check one full workflow before you move the rest.

An open app is not an open engine

The antidetect engine decides what websites see: the fingerprint, the leaks, and the network behavior. An open-source launcher around a closed engine still asks you to trust the part that matters most. AliasMode publishes both the app and the AliasMode Firefox engine, so you can check the whole stack.

How AliasMode Firefox works

Measured head-to-head

We tested Donut Browser in our antidetect browser benchmark on 2026-10-28/29, on its free plan, next to both AliasMode engines. Donut Browser scored 69.1 (B tier). AliasMode Firefox scored 81.0 (A tier), the top score of 12 browsers.

Unlimited accounts on one device only work when every profile keeps its own identity. Two AliasMode Firefox profiles on one computer differed on 5 of 7 hashed signals. Two Donut Browser profiles differed on 4 of 7.

Measured on 2026-10-28/29 on one Linux server with no GPU. Every browser was asked for a Windows identity. Free plans or free trials only. We make AliasMode; the method and the data are public.
MeasureAliasMode FirefoxAliasMode ChromiumDonut Browser
Tier and total, of 100A, 81.0A, 72.5B, 69.1
Cloudflare pages passed3 of 32 of 32 of 3
Fingerprint Pro flagsNonetamperingNone
Signals that differ between two profiles5 of 74 of 74 of 7
Impossible values026
Engine testedAliasMode Firefox 156 (Firefox)AliasMode Chromium 155.0.8059.85 build 4 (Chromium)Wayfern 155.0.8059.79 (Chromium)
Launch time, median3.866 s5.388 s6.193 s
Browser RAM, median561.1 MB529 MB493 MB

Donut Browser’s free plan offers no Windows identity, so it ran with a Linux identity.

See the tier list of all 12 browsers How we tested

Sources and verification

  • Donut Browser · Donut Browser homepage and plans (checked September 2026)
  • Donut Browser · Donut Browser GitHub repository (checked September 2026)
  • AliasMode · AliasMode Firefox engine repository (checked September 2026)

Public product details can change after the check date. Facts are re-checked on a monthly cycle.

Official product evidence

  • Donut Browser · Donut Browser homepage and plans (checked September 2026)
  • Donut Browser · Donut Browser GitHub repository (checked September 2026)
  • AliasMode · AliasMode Firefox engine repository (checked September 2026)

Public product details can change after the check date. Facts are re-checked on a monthly cycle.