Sintra for Agencies: Client Workspaces, Credits and the Terms

Sintra is not built for agencies, and it says so. Its pricing page lists multi-client AI project management among the jobs it will not handle ^[1], and its Terms limit use to personal or internal business purposes, ban commercial resale and say someone else may not pay for your subscription ^[2]. What remains is narrower but real. A freelancer or a small agency can run its own business plus a few client brands on one Sintra X account, each brand in a separate workspace with its own Brain AI. The catch is credits. A workspace with its own paid plan gets 250 a month, while each new extra workspace starts with 20 and no automations.

Where Sintra draws the line on agency work

Sintra's own fit list reads like a freelancer's week: solo or a small team, more tasks than time, one to five businesses to run. The same page then says it will not work for an enterprise, for multi-client AI project management, for complex workflows and data analysis, or for anyone who wants AI to publish without approval. Read together, the two lists describe an operator with a handful of brands, not an agency running a client roster through a shared system. The help center adds that Sintra apps are meant for internal use by authorized staff and do not connect to client-facing tools.

The Terms are the harder boundary. Accounts are personal, so you may not share or sell account access, and someone else may not pay for your subscription. Use is limited to personal or internal business purposes, and commercial resale is prohibited. For an agency, that closes the obvious shortcuts: billing a client for a workspace, handing a client the login, or packaging Sintra itself as a resold service. Doing the client work yourself, with Sintra as your drafting desk, is the reading that fits those rules. Anything else needs Sintra's answer in writing first.

One workspace per client brand

The workspace is the whole mechanism. The pricing page says you can create unlimited workspaces, and the help center says each one is meant for one business, project or client ^[3]. Every workspace keeps its own Brain AI, integrations, chats and automations, and helpers cannot see across them. That separation is the useful part. Penn learns each brand voice separately, so a bakery client and a law-firm client never bleed into each other's copy. Each Brain AI also holds that client's Brand Kit: logo, colors, voice, value proposition and a media library.

The same separation sets hard limits. Each workspace connects one account per integration: one Facebook or Instagram page, one Shopify store, one YouTube channel, one TikTok account and one Commet website. A client with two Facebook pages needs two workspaces. Knowledge cannot be shared between workspaces either, so a style guide used for three clients gets uploaded three times. Creating a workspace requires an active subscription, the account must always keep at least one, and a deleted workspace cannot be recovered. Plan the structure before onboarding anyone.

Credits do not stretch across clients

This is where most agency plans break. Credits belong to one workspace and cannot be pooled, moved or transferred, so the 250 credits a month on a paid workspace do nothing for a client workspace. Each new extra workspace gets a blank Brain AI with 20 free credits a month and no automations. Billing runs per workspace, each with its own plan, balance and cycle. Sintra does not publish what a second paid workspace costs. Confirm it before quoting a client.

The missing automations matter more than the small allowance. An extra workspace gets no weekly Social Media Manager drafts and no Inbox Manager, so every post for that client starts in chat. Approximate costs are about one credit for a social post written and designed in chat, 0.1 for a reply, and about 40 credits for 15 seconds of video. One short clip outruns a free client workspace's whole month. Credits reset monthly with no rollover, even on yearly billing, and Sintra can change what each action costs.

Larger allowances exist only as recurring upgrades of one workspace's subscription, not one-time packs. The single web example Sintra publishes is 600 credits a month on the 3-month plan for $240 for three months, or $80 a month by our arithmetic, and upgrades are non-refundable. Sintra does not list the other package prices on its website, so a busy client workspace needs a quote.

The base Sintra X price is $48.50 a month billed monthly, $23.60 a month billed quarterly ($70.80 every three months), or $15.60 a month billed yearly, which comes to $187.20 a year by our arithmetic, with VAT added at checkout. Sintra does not guarantee the renewal price: its Terms charge renewals at the then-current rate, and offer prices may apply only to the first term. Check the amount in Manage billing before each renewal. The 14-day money-back guarantee covers only the first purchase, and only when you ask support for it explicitly; our Sintra pricing guide has the full billing rules.

Who on your team gets a login

Team members are unlimited, get their own logins and need no subscription; the owner pays. That suits a five-person shop. The permission model is thin, though. The owner is the only role: the owner manages plans and members, adds shared integrations, sees Daily ideas and alone can delete knowledge. No editor or reviewer role separates a junior writer from an account lead, and each person's helper chats stay private. Gmail, Outlook and Notion connections are personal per member, and a client's Google Workspace admin may have to approve Sintra before its mail connects.

More members also burn the shared credits faster, which sharpens the problem above. In team workspaces, Facebook, Instagram and LinkedIn post only to project-oriented accounts, so a client's brand page works where a staffer's personal profile does not. Connecting Facebook and Instagram needs a personal Facebook profile as the login, a Page linked to a Meta Business profile, and an Instagram Business or Creator account linked to that Page. Settle that access with each client before the workspace exists. Our guide to Sintra for marketing teams covers the in-house version of this setup.

What client deliverables actually look like

Sintra drafts and waits for approval on posts and customer replies; only tasks you schedule yourself run without a check. Soshie's Social Media Manager posts always need manual approval before they are scheduled. Emmie drafts campaigns, and you send them from the client's own email platform. Seomi recommends; you, Commet on a Sintra-hosted site, or Penn through a connected CMS draft carry out the changes. Penn writes in more than 100 languages, which helps with clients in several markets. Commet builds one static website per workspace on a free sintra.ai subdomain or a custom domain you buy separately.

That last point has limits a client will notice. Commet sites have no analytics, no file uploads in forms, and are not an eCommerce platform: no multi-product catalog, inventory or checkout. Cassie only drafts replies and is not a chatbot, so she cannot sit on a client's website. Scheduled tasks are the exception that needs watching. A recurring task set to send an email sends it, every run costs credits, and the Terms treat any action an AI assistant starts as authorized by you. On a client's connected accounts, that responsibility is yours.

What the two agency case studies report

Sintra publishes two agency stories, and both are customer accounts rather than measured results. LeadWorks, a five-person remote US digital marketing agency, uses Penn for prospect emails and outreach, Commet for website design and Buddy for business development and brand positioning work ^[4]. Its managing partner says Penn writing one message in four tones helps keep brand voice across clients, and estimates 15 to 20 hours saved a week with no tracked time behind it. Click Hive, a performance marketing agency, uses Dexter for analytics and forecasts and Buddy for strategy, and its page gives no numeric results. Much of the reported use serves each agency's own pipeline.

Should a freelancer run client brands on one Sintra account?

Yes, within tight limits. A freelancer or a two-to-five-person shop with a few steady client brands can use one workspace per brand, draft social posts, emails, copy and simple sites in each client's voice, and approve everything before it ships. Budget around one constraint: only a workspace with its own paid plan has 250 credits and automations, so get the price of extra paid workspaces from Sintra before quoting. If you need client logins with permissions, a resold service or one allowance spread across many businesses, Sintra is the wrong frame. Our Sintra vs Marblism comparison covers a rival that lists unlimited businesses on its single plan.