Nullprint Review 2026: Frozen Fingerprints, an AI-Ready API and a Product Weeks Old

Nullprint is the newest browser in our antidetect cluster, and it shows in both directions. The design is careful: fingerprints are generated once and frozen, time zone and language follow your proxy automatically, a check-up runs before you log in, and an MCP server lets AI agents drive it on every plan. 100 profiles with 2 seats cost $29 a month. What it doesn't have is a history: its public changelog starts on October 14, 2026.

This review is built on what Nullprint publishes: its home page with pricing, changelog, API and MCP documentation, terms and refund policy, all checked on October 22 and 23, 2026. For how its kernel compares with Dolphin, AdsPower, Octo and GoLogin, see Antidetect Browsers for Media Buyers 2026: Real Differences.

What is Nullprint, and who makes it?

A desktop antidetect browser for Windows and macOS. Version 0.2.17 runs on 64-bit Windows 10 and 11 and on macOS 12 and later, Apple Silicon and Intel; there's no Linux client and no mobile app. Nullprint calls itself a "multi-profile browser" built for e-commerce sellers and social media teams, and the app, account and docs come in English and Simplified Chinese.

The company is HENGCHENG LLC. It's the party to the terms and signs both installers; Apple notarized the macOS build. The Windows installer carries a Microsoft-verified signing certificate that gives the company's location as Irvine, California. The site itself doesn't say where the company is registered, and the terms name no governing law.

The product is weeks old. The domain was registered on July 15, 2026, the refund policy is dated October 4, the terms October 6, the GitHub account was created on October 7 and the changelog starts with version 0.2.5 on October 14. Releases come fast: 0.2.16 on October 21 and 0.2.17 on October 22.

The audience is partly Chinese. Besides cards, Nullprint takes Alipay and WeChat Pay, its changelog fixes problems on Chinese-language Windows, and its FAQ explains how to get the installer past Chinese antivirus programs.

Fingerprints: generated once, then frozen

This is Nullprint's main idea. A fingerprint is generated when you create a profile and stays the same across restarts. Nullprint says Canvas, WebGL, audio, ClientRects and font metrics are noised per profile inside its kernel, not by an extension. Profiles on the same computer get different GPU models automatically.

The environment follows the proxy. Enter a proxy and Nullprint finds its exit IP, then sets the time zone, language and geolocation to match, and recalculates them when you change proxies. That removes the classic mistake of a US IP with a Chinese time zone.

A check-up before every launch. One click checks that the exit IP, time zone, language and fingerprint settings agree, and saves a Consistent, Warning or Mismatch result with the profile. The proxy pool highlights a proxy that several profiles share, which is how accounts usually get linked.

What we can't tell you is how well it works. We found no published analysis of Nullprint's fingerprints by a detection company or researchers. The method is described; the results aren't proven. Test it on your own checkers before you trust it.

Which kernel is Nullprint running?

Its own build of Chromium 154, with others on demand. Nullprint compiles its kernel from Chromium source. New profiles use 154; since version 0.2.17 on October 22 you can pick 155 when you create a profile. Older kernels are available on request: 152 as a long-term support version, 148 and 144. macOS 12 only gets 148, because 154 needs macOS 13.

Chrome 156 came out on October 20, so the default kernel is 2 versions behind and the optional one 1. Nullprint doesn't publish when it built each kernel, so we can't measure how fast it follows Chrome. With only a few weeks of changelog, there's no track record either way.

Use the newest kernel you can. A profile on 144 claims a Chrome from January 2026, which stands out to the sites you log into. Version 0.2.5 also added a Firefox kernel. Nullprint's open-source page says it's based on Camoufox, an open-source antidetect build of Firefox, but doesn't name the Firefox version.

Automation: Local API and MCP on every plan

Scripts and AI agents are first-class here. The app runs a local API on port 7801 that needs an API key, and Playwright attaches to running Chrome-kernel profiles over CDP. Nullprint states that "MCP and the Local API are included in every plan," including the free one and the trial.

The MCP server is open source under the MIT license and connects Claude Code, Codex, Claude Desktop and other MCP clients with one command. The docs list 17 tools, the home page says 18. An agent can create profiles, run check-ups, launch browsers, open pages and read them.

The guard rails are sensible: agents can move profiles to the recycle bin but can't delete them permanently, and there are no file-writing tools. A window synchronizer mirrors clicks, scrolling and typing across profiles, on Windows only. There's no no-code automation.

Team work: cheap seats and an audit log

Seats come with the plan, from 1 on Lite to 30 on Scale, and extra members cost $3 a month each through support, less than the $5 AdsPower and MoreLogin charge. A team of 3 on 100 profiles pays $32 a month.

Permissions are practical. There are 4 roles, Owner, Manager, Operator and Viewer; access is granted by group or by single profile, and you can cap how many profiles each person creates. Account creation, permission and setting changes and exports go to an audit log you can export as CSV.

Logins stay on each computer. Team sync carries only profile settings: fingerprint, proxy and launch options. Cookies don't travel with it; the owner can turn on cookie cloud sync per profile, which is end-to-end encrypted with a recovery code Nullprint says it can't read. Saved usernames, passwords and 2FA secrets sit in the operating system's keychain, and the profile page shows the live 2FA code.

Refunds and terms

The refund window is 24 hours, and narrow. You can get a refund only on your first payment, within 24 hours, and only if the software can't be used because of a fault on Nullprint's side that support couldn't fix within 24 hours. Payments in USDT are never refunded, and a chargeback filed without contacting support first deactivates the account.

Platform rules are your problem. The terms ban fraud, impersonation, account theft, spam and malware, and add: "You are responsible for complying with the rules of the websites and platforms you use." Nullprint doesn't promise how platforms will treat your accounts.

When a plan ends, nothing is deleted. The account drops to the free plan: your 5 oldest profiles stay usable and the rest are locked until you renew. Member accounts are paused.

Signing up and paying

Start with the trial. Every new account gets 7 days of the Team plan, 500 profiles and 10 members, then keeps the free plan with 5 profiles and 1 member forever. We don't have a referral link or a promo code for Nullprint: sign up on its site, and see its card in our catalog for the key facts.

Payment is by card, Alipay or WeChat Pay through Stripe, or in USDT through MixPay, for 1, 3 or 12 months. Quarterly billing takes 15% off and yearly 30%. Subscriptions don't renew automatically: you renew by hand, and an early renewal adds the new term after the current one. Remember that USDT payments can't be refunded.

If you want to refer people yourself, Nullprint's affiliate program pays 20% of what it actually receives from your referrals for as long as they pay, in USDT, once you have $30 and 5 paying referrals.

Nullprint pricing in October 2026

Prices from the home page on October 22, 2026, in USD; every plan includes every feature:

• Free. Profiles: 5. Members: 1. Monthly: $0. Quarterly, per month: $0. Yearly, per month: $0.
• Lite. Profiles: 30. Members: 1. Monthly: $9. Quarterly, per month: $7.65. Yearly, per month: $6.30.
• Personal. Profiles: 100. Members: 2. Monthly: $29. Quarterly, per month: $24.65. Yearly, per month: $20.30.
• Starter. Profiles: 200. Members: 5. Monthly: $49. Quarterly, per month: $41.65. Yearly, per month: $34.30.
• Team. Profiles: 500. Members: 10. Monthly: $99. Quarterly, per month: $84.15. Yearly, per month: $69.30.
• Pro. Profiles: 1,000. Members: 20. Monthly: $159. Quarterly, per month: $135.15. Yearly, per month: $111.30.
• Scale. Profiles: 3,000. Members: 30. Monthly: $299. Quarterly, per month: $254.15. Yearly, per month: $209.30.

Extra members cost $3 a month each; above 3,000 profiles, prices are on request.

Nullprint vs other antidetect browsers

How it compares at about 100 profiles, October 22, 2026:

• Nullprint. 100 profiles, monthly: $29, 2 seats. Yearly, per month: $20.30. 3 people, about 100 profiles: $32. On the free plan: 5 profiles, API and MCP. Chromium kernel on October 22: 154, 155 optional.
• RoxyBrowser. 100 profiles, monthly: $28. Yearly, per month: $16.80. 3 people, about 100 profiles: $28, plus $10 once. On the free plan: 2 profiles, API. Chromium kernel on October 22: 155.
• Kameleo. 100 profiles, monthly: 59 EUR, 10 browsers at once. Yearly, per month: 45 EUR. 3 people, about 100 profiles: 59 EUR, seats free. On the free plan: unlimited local profiles, 2 at once, 300 minutes. Chromium kernel on October 22: 156.
• AdsPower. 100 profiles, monthly: $36. Yearly, per month: $21.60. 3 people, about 100 profiles: $46. On the free plan: 2 profiles, no API. Chromium kernel on October 22: 155.
• MoreLogin. 100 profiles, monthly: $35. Yearly, per month: $21. 3 people, about 100 profiles: $40. On the free plan: 2 profiles, API, RPA. Chromium kernel on October 22: 148 (last published, June).
• Dolphin{anty}. 100 profiles, monthly: $89. Yearly, per month: $53. 3 people, about 100 profiles: $109. On the free plan: 3 profiles, no API. Chromium kernel on October 22: 155.

Nullprint vs RoxyBrowser is a tie on price at 100 profiles. RoxyBrowser has a dated kernel history that usually follows Chrome within a week, Linux and day passes; Nullprint has frozen fingerprints, a check-up, an audit log and MCP built into the product. Our RoxyBrowser review has the details.

Nullprint vs Kameleo is the AI-agent choice: both put automation first. Kameleo runs Chrome 156 and has years behind it, but costs about twice as much; Nullprint is cheaper and new. See our Kameleo review. For the whole field, see the antidetect browser pricing comparison.

If you sign up for one of the others, here are our referral links: RoxyBrowser, AdsPower, MoreLogin and Dolphin{anty}.