Best Free Antidetect Browsers: Where the Limits Bite

The best free antidetect browser is the one whose free ceiling is not the resource your job consumes. Count your daily profile launches first, concurrent sessions second, and total profiles last. Vendors cap them in roughly the reverse order of how much you care.

Four names cover most real situations:

• Nstbrowser has the largest free profile allowance by a distance (500 profiles), but caps you at 10 launches per day. Storage is free. Opening things is not.
• Dolphin Anty gives 10 profiles with no expiry date, which suits a person running about ten accounts every day far better than 500 profiles you can only open ten times.
• Undetectable.io stores unlimited profiles locally on every plan, including the free one, with 5 cloud slots. Local storage means no sync and no team sharing.
• GoLogin (3 profiles) and AdsPower (2 profiles) are small but complete free tiers, useful as evaluation sandboxes rather than as production capacity.

Everything else marketed as free is either a time-limited trial (Hidemyacc, Octo Browser, Multilogin's low-cost paid trial) or a bundle, such as Decodo's X-Browser, which is free to anyone holding an active proxy subscription. Plan figures here reflect vendor pricing pages checked in May 2026, and free-tier terms change more often than paid ones, so confirm the current numbers before you build a workflow on them.

The query "free antidetect browser" returns three products with almost nothing in common. Sorting them first saves a lot of wasted evaluation.

1. A free tier of a commercial tool

A permanent plan with a hard resource cap: N profiles, N launches, one seat. The software is the same binary paying customers run, which is the main attraction. What you give up is capacity, team features, and usually the local automation endpoint. The vendor's incentive is to make the free tier big enough to demonstrate the product and small enough to break the moment you do real volume.

2. Free because you already paid for something else

X-Browser from Decodo is the clearest example: no per-profile or per-seat fee, included with a proxy plan. The browser is genuinely free. The subscription it rides on is not. This is the honest shape of most free antidetect offers, because the vendor selling you IPs makes its money on bandwidth, not on the browser.

3. Free and open source

Camoufox, Patchright, undetected-chromedriver, and plain Chromium driven with separate profile directories. No account, no cap, no expiry, no vendor. These are not antidetect browsers in the commercial sense: they are automation stacks with the obvious tells removed. There is no profile manager, no cookie vault, no UI for the person running twelve marketplace seller accounts.

Group three is where the honest answer to "is there a completely free antidetect browser" lives, and it is also where most people asking the question would be miserable.

Two columns in that table decide more outcomes than the profile count: the ceiling column and the proxy column. Read them first.

Nstbrowser: 500 profiles, 10 launches a day

The headline is real and so is the catch. 500 stored profiles with 3 team members on a zero-dollar plan beats several tools' paid entry tiers. The 10 daily launches means those 500 profiles are an archive, not a working set. If your job is keeping 400 seller accounts warm, the free plan cannot do it, because warming requires opening them. If your job is holding a large library and touching a handful each day, it is the most generous free plan on the market.

Dolphin Anty: 10 profiles with no time limit

Ten permanent profiles, no trial clock, aimed squarely at affiliate and media buying workflows. For one person running one account per platform across ten platforms, or ten accounts on one platform, this is the free tier that does actual work rather than demonstrating the product. Its paid step up starts at around $10 per month for 60 profiles, so the upgrade path is cheap when you outgrow it. We compare its fingerprinting approach against the obvious alternative in Dolphin Anty vs GoLogin.

Undetectable.io: unlimited local profiles

A different architectural bet. Profiles live on your disk instead of the vendor's cloud, on every plan including free, with 5 cloud slots for sync. Unlimited local storage is a genuine outlier. The cost is structural rather than contractual: a local profile lives on one machine, so there is no sharing, no failover, and no recovery if the disk dies. Back up the profile directory, or accept that the accounts live and die with the laptop.

GoLogin: 3 profiles plus a shared test pool

Three profiles is small, but GoLogin's free tier includes access to a built-in proxy pool, which makes it the fastest way to see whether a profile launches and holds a session at all. Treat those IPs as a smoke test, not as identity infrastructure. They are shared, and a shared IP under a profile you intend to keep is the fastest way to link that profile to strangers. Head-to-head detail is in Multilogin vs GoLogin.

AdsPower: 2 profiles

Two profiles is an evaluation tier, and AdsPower is upfront about that. It is enough to answer the only question an evaluation needs to answer: do two profiles opened side by side on two different exits look like two unrelated people? Paid plans start around $9 per month. See AdsPower vs Multilogin for where it sits against the incumbent.

The ones that are trials, not free tiers

Octo Browser has no free plan, only a paid trial. Hidemyacc runs a 7-day free trial with no card required. Multilogin's entry point is a low-cost paid trial rather than a free plan. Calling any of these free antidetect browsers is a stretch, though the no-card trials are still the cheapest way to evaluate a tool properly before committing.

If free means free forever with no account, this is the category, and it deserves more attention than the listicles give it.

Here is the part most comparisons miss. A real browser produces a real TLS fingerprint for free. Camoufox and Patchright drive genuine Firefox and Chromium builds, so their JA3 and JA4 handshakes are the ones the vendor shipped, not an approximation. That layer, which trips up a lot of HTTP-library scrapers, costs nothing here. If TLS-level detection is new to you, what is TLS fingerprinting covers the mechanism.

What you are paying commercial vendors for, then, is mostly not the fingerprint. It is profile lifecycle: storage isolation you do not have to script, cookie import and export, a searchable list of 200 identities with notes, team handover, and sync. Those are product features, not stealth features. Decide which one you actually need before you assume a paid plan is the upgrade.

Five ceilings, roughly in the order people hit them.

Ceiling 1: daily launches, not profiles

The number on the pricing page is storage. The number that governs your day is how many profiles you can open. A plan with 500 profiles and 10 daily launches supports 10 active identities. A plan with 10 profiles and no launch cap supports 10 active identities. They are the same plan for daily work, and only one of them looks generous.

Ceiling 2: no local automation API

Commercial antidetect browsers expose a local HTTP endpoint that returns a WebSocket URL you attach Playwright, Puppeteer, or Selenium to. That endpoint is the difference between a browser you click and a browser you script. Free tiers frequently withhold it or throttle it hard. If your plan is to automate anything at all, test this on day one, because discovering it after you have built 60 profiles by hand is an expensive lesson.

Ceiling 3: one seat, no sync

Free means one machine and one person, almost universally, with Nstbrowser's 3 free seats as the exception. The moment a second person needs to open an account, or the same person needs it from a second machine, you are on a paid plan. Local-only tools like Undetectable.io are structurally single-machine on every plan, which is a design choice rather than a paywall.

Ceiling 4: engine version drift

Free tiers tend to lag on the Chromium or Firefox base version. This matters more than it sounds. A browser announcing Chrome 121 in the middle of 2026 is itself an anomaly, because the real installed base moved on months ago and stale majors cluster with automation traffic. Check the version the profile reports against the current stable release before you trust a free build with anything valuable.

Ceiling 5: the bundled free proxy pool

Free proxy access inside a free browser tier is shared infrastructure. It works for confirming a profile launches and reaches a site. It fails as identity infrastructure, because the exit is rotating or shared, and an account that logs in from a different city every session is a support ticket waiting to happen.

Here is the arithmetic nobody puts in a free-tools listicle.

Ten free profiles on one internet connection are one identity. Not ten. The profiles differ in canvas hash, fonts, and screen metrics, and they agree on the single signal every platform indexes first: the IP address. Any risk engine that groups sessions by IP groups all ten together, and the fingerprint work you did makes no difference to that grouping.

So the practical limit on a free antidetect browser is not the vendor's cap. It is how many distinct exits you can afford. That is the honest reason free antidetect browsers usually still need paid proxies to be worth anything, and it is why the vendors giving away the most generous browser tiers are frequently the ones selling you IPs.

Every tool above takes standard proxy credentials per profile. The fields are the same everywhere:

Proxy type:  HTTP
Host:        gateway.sparkproxy.io
Port:        11000
Username:    <your proxy username>
Password:    <your proxy password>

Port 11000 rotates the exit per connection, which suits scraping and price checks. Port 11002 holds a sticky session, which is what you want under a logged-in profile. Port 13000 speaks SOCKS5 for tools that prefer it, and it is TCP only, so page loads are fine while WebRTC's UDP paths will not traverse it. Set WebRTC in the profile to disabled, or to match the proxy, rather than leaving it on default.

Verify the exit before you attach it to anything you care about:

curl -s --proxy http://USER:PASS@gateway.sparkproxy.io:11002 https://ipinfo.io/json

Run it twice on 11002 and confirm you get the same IP back, then run it on 11000 and confirm you do not. That two-command check catches misconfigured ports before an account does.

For the record, SparkProxy sells datacenter proxies and is not free. There is a 24 hour trial, which is enough to pair a free browser tier with real exits and find out whether the combination survives your target site before any money changes hands. Datacenter IPs are the right class for scraping, SERP work, and price monitoring. For holding consumer accounts on the strictest social platforms, budget for residential from whoever you buy it from, including us.

A meaningful share of "free antidetect browser download" traffic ends up on nulled builds of Multilogin, Linken Sphere, and Octo, distributed through forums and file lockers. Skip them, and not for licensing reasons.

Consider what the application does by design. It stores session cookies for every account you own, holds saved passwords, keeps proxy credentials in plaintext-equivalent local config, and makes constant outbound calls to a vendor API. Every behavior a credential stealer needs is behavior this software performs legitimately. There is no observable difference between a patched license check and a patched license check plus an exfiltration routine, which makes casual inspection close to useless.

The economics are bad too. A cracked seat of a $30 per month tool is worth maybe $360 a year to you. One drained ad account or one hijacked marketplace seller account costs multiples of that. Two free tiers on this page, Dolphin Anty and Nstbrowser, hand you more capacity than most cracked seats provide, from a signed installer, at the same price.

If you insist on evaluating an unofficial build: fresh VM, throwaway accounts, no cookie imports, no password manager, and no proxy credentials you use anywhere else.

The pattern is consistent: free tiers cover one person doing a bounded amount of work. Add a second person, or automation, or scale, and every one of them converts to paid. That is the product design, not a flaw.

Run this before you build anything on a free plan. It surfaces the ceilings in under an hour.

1. Create two profiles and attach two different proxy exits. Not the bundled pool. Two real exits, one per profile.
2. Open both at once. If the plan caps concurrency below two, you learned the most important thing on the list immediately.
3. Check coherence on each. Load https://browserleaks.com/javascript and confirm the timezone, locale, and language reported by the profile match the country of its exit. A profile claiming America/New_York from a Frankfurt IP is more identifiable than plain Chrome, not less.
4. Check WebRTC. On the same site, confirm no local or ISP-assigned address leaks past the proxy. This is the most common free-tier misconfiguration by a wide margin.
5. Run a fingerprint consistency scan. CreepJS at https://abrahamjuliot.github.io/creepjs/ flags values that contradict each other, which is what detection vendors look for. A rare fingerprint is survivable. A self-contradicting one is not.
6. Test the automation endpoint. Try to attach Playwright or Selenium to the local API. Available, throttled, or paid-only: find out now, not after 60 hand-built profiles.
7. Log in to one throwaway account per profile and leave them 24 hours. Come back the next day. Session survival across a day is the only test that matters, and no fingerprint scanner substitutes for it.
8. Count your launches. Note how many opens the plan allowed before it complained. That number, not the profile count, is your real capacity.

If a tool fails step 3 or step 4, no amount of profile allowance rescues it.