# Anti-detect browser for agencies > An anti-detect browser for agencies puts every client in its own project and every client login in its own profile, with that client's exit and 2FA codes. Source: https://mosaicbrowser.com/use-cases/agencies ## Anti-detect browser for agencies: a browser per client An anti-detect browser for agencies gives every client login its own browser profile, with separate cookies, fingerprint and proxy exit, so client accounts never share a session. In Mosaic each client is a project, and the platforms' own agency access still comes first. ![One project per client, one profile per login, beside a screenshot: mosaic projects: one library split into Client work, Etsy shops and Social team](https://mosaicbrowser.com/covers/agencies.webp) An agency with twelve clients does not have twelve accounts. It has twelve Meta portfolios, a few Google Ads accounts, a Shopify admin or two, the client's own email newsletter tool, an analytics login that only has a password, and a two-factor code that lives on somebody's phone. Mosaic sorts that by client: a project per client, a profile per login, and in each profile the client's own cookies, exit and codes. ## Agency access comes first The big platforms have proper ways for an agency to work on a client's account without the client's password, and they are better than any browser. Meta lets a business share its Pages and ad accounts with a partner's business portfolio (Meta Business Help Center, read 2 November 2026). Google Ads manager accounts put many client accounts under one sign-in (Google Ads Help). TikTok's Business Center lets an agency request access to a client's ad account or be added as a partner (TikTok Ads Help). Shopify gives partners collaborator accounts, scoped to the parts of a store the client picks (Shopify Help Center). YouTube's channel permissions give a manager a role on a channel without access to the owner's Google Account (YouTube Help). All read 2 November 2026. Some platforms allow one account per person. LinkedIn's User Agreement says you will only have one account, in your real name, and forbids using someone else's (LinkedIn, read 2 November 2026), so a client's personal profile is not something an agency logs into. Mosaic keeps the accounts you are entitled to run apart; it does not change what a platform allows. Mosaic is a desktop app Email yourself the link and open it on your computer. [How it works: Provider minting](https://mosaicbrowser.com/features/proxy-providers) ## Where agencies still need a browser per client Agency access stops at the big platforms. The rest of a client's stack is a username and a password: the newsletter tool, the booking system, the analytics account the founder set up in 2019, a regional marketplace with no partner programme. Agencies end up signing in to those directly, often several clients' versions of the same tool on the same day. In one Chrome that goes wrong in plain ways. The newsletter tool remembers the last client you signed in as, so a campaign goes to the wrong list. A client's tool sees your office address on twelve unrelated businesses. Somebody pastes a code from the wrong row of the authenticator app. Separate Chrome profiles fix the cookies but share one fingerprint and one network, which is what [how sites link accounts](https://mosaicbrowser.com/guides/how-to-manage-multiple-accounts-without-getting-linked) walks through. ## How an agency sets up Mosaic 1. **A project per client.** Each project has its own colour and icon, so the client you are working on is visible in the sidebar, and the profile table shows that client only. 2. **A profile per login.** "Acme - newsletter" holds that one session and nothing else. Logins and two-factor codes are stored per profile, and the companion inside the browser shows that profile's codes only. 3. **An exit where the client is.** Paste your proxy seller's gateway line once as a [provider](https://mosaicbrowser.com/features/proxy-providers). Each profile mints its own session, so no two clients share an address, and the profile's timezone and language follow the measured exit. 4. **A preset for each kind of client.** A preset makes new profiles with the same start pages, bookmarks, tags and provider pick, so onboarding the next client is a few clicks. 5. **Leave when the contract ends.** Deleting the project moves every profile in it to the trash and closes any browser still open. Trash keeps them 30 days by default. ![The Mosaic project switcher: Default, Client work, Etsy shops and Social team, each with its own colour](https://mosaicbrowser.com/shots/projects.png) *Projects split one library by client, each with its own colour* ## What stays on your computer Client sessions are the most sensitive thing an agency holds. Mosaic has no cloud copy of your profiles: profiles, cookies and proxies stay on your computer, and the store and cookie jars are encrypted on disk. Turn on app lock and nothing decrypts without your password. Each profile's downloads go into its own folder, so one client's reports and invoices never sit next to another's. [Local first](https://mosaicbrowser.com/features/local-first) covers what our server does know, which is your plan, your computers and when a profile opens, by an id. ## Where Mosaic is the wrong fit Mosaic has no seats, no roles and no shared profiles. If five account managers need the same client logins on five laptops, that is the platform's user roles or a team product, not us. It also has no scheduler and no shared inbox. It suits a founder-led agency or a specialist who does the hands-on work from one machine. For the paid-media side, [browser profiles for client ad accounts](https://mosaicbrowser.com/use-cases/ad-account-management) has the specifics. Free covers 3 profiles; Pro is $49 a month, one plan, with no per-profile pricing and a 14-day free trial. See [pricing](https://mosaicbrowser.com/pricing). ## Sources 1. [Meta Business Help Center: Give a partner access to business assets in your business portfolio](https://www.facebook.com/business/help/1717412048538897), read November 2, 2026 2. [Google Ads Help: About Google Ads manager accounts](https://support.google.com/google-ads/answer/6139186), read November 2, 2026 3. [TikTok Ads Help: Agency Business Center FAQs](https://ads.tiktok.com/resources/help/article/agency-business-center-faq), read November 2, 2026 4. [Shopify Help Center: Working on client stores](https://help.shopify.com/en/partners/manage-clients-stores/working-on-client-stores), read November 2, 2026 5. [YouTube Help: Add or remove access to your YouTube channel with channel permissions](https://support.google.com/youtube/answer/9481328), read November 2, 2026 6. [LinkedIn User Agreement](https://www.linkedin.com/legal/user-agreement), read November 2, 2026 ## Questions ### Does my agency need an anti-detect browser if clients give us partner access? For the access itself, no. Meta's business portfolios, Google Ads manager accounts and TikTok's Business Center are built for that. A separate browser helps with the logins those tools do not cover, and with keeping client sessions from mixing. ### Can several people at the agency share one Mosaic profile? Not across computers. Mosaic has no team seats and no cloud sync; a profile lives on the computer that made it. Give each person their own access through the platform's user roles. ### What happens to a client's profiles when the contract ends? Delete the client's project and every profile in it goes to the trash, closing any browser still open. The trash keeps them 30 days by default, and each profile's downloads go with it when it is deleted for good. ### Can we log into a client's personal LinkedIn? LinkedIn's User Agreement allows one account per person, in their own name, and forbids using someone else's. Manage company pages through page admin roles instead. ## Related [Mosaic for agencies and media buyers managing ad accounts](https://mosaicbrowser.com/use-cases/ad-account-management): Keep each client's ad platform logins, two-factor codes and sessions in their own browser profile, and see their ads from the client's own market. [Mosaic for social media managers running brand accounts](https://mosaicbrowser.com/use-cases/social-media-teams): Keep each brand's social logins, two-factor codes and notes in their own browser profile, on their own exit, and check posts as the brand's market sees them. [How to manage multiple accounts without getting them linked](https://mosaicbrowser.com/guides/how-to-manage-multiple-accounts-without-getting-linked): Accounts get linked by shared cookies, IPs, fingerprints and habits. Give each its own profile, exit and history, then test it before you trust it. [Provider accounts: one gateway line, one exit per profile](https://mosaicbrowser.com/features/proxy-providers): Paste your proxy seller's gateway line once and Mosaic mints a separate session for every profile, so each one browses from its own exit address. [Local first: your profiles stay on your computer](https://mosaicbrowser.com/features/local-first): Mosaic has no cloud copy of your profiles. Profiles, cookies and proxies stay on your computer, encrypted on disk, with app lock, daily backups and a trash. [Anti-detect browser for affiliate marketing](https://mosaicbrowser.com/use-cases/affiliate-marketing): An anti-detect browser for affiliate marketing gives each ad account and network login its own profile, exit and cookies. Pro is one price at any count. [Anti-detect browser for social media managers](https://mosaicbrowser.com/use-cases/social-media-managers): Social media managers need an anti-detect browser only for brand logins with no platform role: one profile per brand, with its own exit and 2FA codes.  ## Set Mosaic up for agencies Projects per client, a preset that mints each profile its own exit, and logins with 2FA codes kept per profile. Free holds 3 profiles. Pro is $49 a month for any number. Mosaic is a desktop app Email yourself the link and open it on your computer.