Best White Label Social Media APIs for Agencies in 2026: 7 Compared, with Real Prices and Screenshots

TLDR: A white label social media API lets an agency sell social media management under its own brand while the API maintains the platform integrations. The seven serious options handle “white label” three different ways. PostZen (our pick) is headless by default: the connect URL goes straight to each platform’s consent screen and back to your app, pricing is flat per connected account with unlimited posts, and one key covers publishing, queues, bulk CSV, analytics, the comment and DM inbox, and Instagram comment-to-DM automations. Ayrshare gives you a hosted connect page with your logo, priced per client profile from $149 a month. Zernio offers a headless mode and per-account pricing that drops to $1 above 100 accounts. Postproxy bills per client group from $49 a month. Outstand is the one that sells your own name on the OAuth consent screen, billed by posts from $19 a month. bundle.social has unlimited accounts on post-pool plans from $100. Upload-Post has the most-branded hosted page from $33 a month billed annually. Every price below was read from the vendor’s pricing page, and every screenshot captured, on September 23, 2026.

What does white label mean for a social media API?

An agency’s client should see one brand: yours. With a social media API, the brand can leak in three places, and the APIs in this guide differ on each:

Two practical notes before the list. First, the consent screen is the part agencies over-worry about: it appears once per account, for a few seconds, and names an app the client is authorizing. Most agencies accept the provider’s name there in exchange for skipping months of Meta, TikTok, and LinkedIn app reviews. Second, the connect step and the billing unit are what you live with every day, so they carry most of the weight in the rankings below.

How we compared

We read each vendor’s own homepage, pricing page, and white-label documentation on September 23, 2026, and captured the screenshots below the same day. Prices are exactly as listed, in US dollars, before tax; where a vendor displays annual billing by default, we say so. Nothing here is estimated from third-party roundups.

1. PostZen: headless white-label API with the broadest agency surface

PostZen is a social media API and scheduler for developers, agencies, and AI agents, publishing to ten platforms: Instagram, Facebook, Threads, X, LinkedIn, TikTok, YouTube, Pinterest, Bluesky, and Telegram.

How the white label works. There is no PostZen page in the middle of the connect flow for eight of the ten platforms. You create a profile per client, request a connect URL for a platform, and PostZen returns the platform’s own authorization URL. The client approves on Instagram’s or TikTok’s screen and lands back on your redirectUrl with the result. Your clients never create a PostZen account and never see a PostZen interface.

# One profile per client, then a connect URL that returns to your app
curl "https://api.postzen.dev/v1/connect/instagram?profileId=$CLIENT_PROFILE_ID&redirectUrl=https://app.youragency.com/connected" \
  -H "Authorization: Bearer $POSTZEN_API_KEY"
# → { "authUrl": "https://www.instagram.com/oauth/authorize?...", "state": "..." }

Around that sit the pieces an agency needs to run many clients through its own interface:

• Client isolation. Profiles group each client’s accounts, and API keys can be scoped to selected profiles and to read-only, so a reporting integration for one client cannot see or post to another.
• Reconnects you can automate. Accounts report connected, needsReauth, disconnected, or disabled, and account.needs_reauth and account.disconnected webhooks fire so your app can send the client a fresh connect link before posts fail.
• More than publishing. Queues with weekly slots, bulk CSV upload with a dry run, analytics, a comment inbox for Instagram, Facebook, and Threads, Instagram DMs, and Instagram comment-to-DM automations, all on the same key. Agencies that sell community management, not just scheduling, get it without a second vendor.
• Agent tooling. An MCP server with 69 tools, Node and Python SDKs, a CLI, and an n8n node, so client work can run from Claude, ChatGPT, Cursor, or an automation.

Pricing. Flat plans by connected account, every feature on every plan, unlimited posts on paid plans:

• Free: $0, 2 accounts, 20 posts a month
• Starter: $19 a month, 5 accounts
• Pro: $49 a month, 20 accounts
• Scale: $149 a month, 100 accounts
• Extra accounts on paid plans are $3 each per month; X API usage is passed through at X’s cost

Pros: headless connect by default; flat per-account pricing with no post metering; the widest engagement surface here (inbox, DMs, comment-to-DM) on one key; profile-scoped keys for client isolation; 69 MCP tools plus SDKs, a CLI, and an n8n node.

Cons: the platform consent screens show PostZen, with no bring-your-own-app option; the Bluesky and Telegram connect pages are PostZen-hosted and name PostZen; ten platforms, fewer than Ayrshare, bundle.social, or Upload-Post; group-metered and post-metered APIs cost less for the same client book, and at hundreds of accounts PostZen is the most expensive option here (the worked bills below show both).

Best for: agencies building their own client dashboard or portal that want publishing, engagement, and automation from one integration, at a bill that moves only when a client adds an account.

2. Ayrshare: the most mature hosted, branded connect page

Ayrshare is the longest-established API in this list, covering 14 networks including Reddit, Snapchat, Google Business Profile, and WhatsApp in beta.

How the white label works. Your clients connect through Ayrshare’s hosted connect accounts page, opened with a JWT URL you generate. Ayrshare’s docs describe it as the only Ayrshare interface your customers ever see. Every plan can add your logo, custom headers, the list of networks shown, the page language, and your own help links. The Max Pack add-on adds a full custom CSS file, favicon, page title, and footer, plus an embeddable connect widget and a direct mode where your own button opens a single-network popup. Direct mode requires your own X developer keys for X.

Pricing. Billed per social profile, meaning one client, brand, or location with any number of networks:

• Premium: $149 a month, 1 profile, single user
• Launch: $299 a month, up to 10 profiles, 28-day free trial
• Business: $599 a month for the first 30 profiles ($499 annual), then $8.99 per profile from 31 to 100, $3.49 from 101 to 500, and $2.49 above 500 (monthly rates)
• Enterprise: custom, from 300 profiles
• Max Pack: $300 a month on Business, included in Enterprise

Pros: the most configurable hosted connect page; 14 networks; per-client billing that does not change when a client adds a network; history, moderation, and ads APIs; 27 MCP tools.

Cons: the highest entry price for multi-client work ($299 for 10 clients); the deeper white-label options sit behind the $300 Max Pack; the connect page is Ayrshare-hosted, so the client leaves your app for it.

Best for: agencies that want a polished hosted connect page they can send by email and can absorb a per-client price.

3. Zernio: headless mode and per-account pricing that falls with volume

Zernio (getlate.dev, the old home of the Late API, now redirects to zernio.com) is a social media and messaging API covering 16 channels, including blogs, ads, SMS, and WhatsApp alongside the social networks.

How the white label works. Zernio’s standard flow hosts a selection step for platforms where the user picks a Page, organization, or board. With headless=true, the user comes back to your redirect URL with a temporary token, and you render the selection screen yourself using Zernio’s list and select endpoints, so the client never sees a Zernio page.

Pricing. Per connected account, graduated, with every feature included:

• Accounts 1 to 2: free
• Accounts 3 to 10: $6 each per month
• Accounts 11 to 100: $3 each per month
• Accounts 101 and up: $1 each per month
• Enterprise: custom, available past 2,000 accounts

Pros: a documented headless mode including the page and board selection steps; per-account pricing that becomes cheap at volume; broad channel coverage beyond social; MCP access.

Cons: per-account pricing is expensive at small and mid scale ($258 a month for 80 accounts); the breadth beyond social media (ads, SMS, calls) is more than most agencies need.

Best for: agencies with hundreds of connected accounts that also want messaging channels, and that are comfortable building their own selection screens.

4. Postproxy: per-client groups at the lowest per-client price

Postproxy is an EU-hosted social media API for agencies, SaaS products, and AI agents, with publishing, comments, DMs, reviews, and analytics across 11 platforms.

How the white label works. Postproxy is API-only toward your clients: connect links open from inside your product, and clients never create a Postproxy account. Each client is a profile group, and scope is enforced per group so posts and replies cannot cross clients.

Pricing. Unlimited posts and engagements on paid plans:

• Free: 10 posts
• Agentic: $17 a month, 5 connected profiles, then $4 down to $1 per profile
• Business: $49 a month, 20 profile groups, then $2 per group to 50, $1.75 to 100, $1.50 to 250, $1.25 beyond
• Enterprise: $399 a month, 300 profile groups, then $1 per group

A profile group holds one account per network, so a client with two Instagram accounts counts as two groups. Postproxy’s pricing notes also cap X at 20 posts per account per 24 hours.

Pros: the lowest price per client in this list for typical agencies; strict per-client isolation; EU hosting and GDPR focus; comments, DMs, and reviews included.

Cons: one account per network per group; the X cap of 20 posts a day per account; 11 platforms; monthly billing only on Agentic and Business.

Best for: EU agencies, and agencies with many clients who each use one account per network.

5. Outstand: your own name on the OAuth consent screen

Outstand is a usage-priced social media API covering 12 platforms, and it is the one in this list that makes the consent screen part of its white-label pitch.

How the white label works. Outstand runs its own OAuth apps (“Managed Keys”) on LinkedIn, Instagram, Facebook, Threads, YouTube, Pinterest, and TikTok, with Bluesky by app password. On any network you can register your own OAuth app and give Outstand the client ID and secret, so the consent screen shows your agency’s name and logo. On X, Google Business Profile, Vimeo, and Reddit your own app is required, which means your own developer account, review, and on X, your own pay-per-use bill.

Pricing. By posts, with unlimited connected accounts:

• Pay as you go: $19 a month including 3,000 posts, then $0.007 per post to 10,000 and $0.005 per post above
• Business: $129 a month including 50,000 posts, then $0.005 per post; reselling explicitly permitted
• Enterprise: custom

Pros: the only API here that sells your own OAuth app as a feature on any network; unlimited accounts; the lowest bill at low post volume; 28 MCP tools.

Cons: four networks require your own developer app before they work at all; post-metered billing grows with client activity; bringing your own app means owning its review and compliance.

Best for: agencies whose clients must see the agency’s name on the consent screen, and that have a developer to manage their own platform apps.

6. bundle.social: unlimited accounts on post-pool plans

bundle.social is a unified social media API across 15 platforms, including Reddit, Discord, Slack, Mastodon, Snapchat, and Google Business Profile, priced per organization rather than per account.

How the white label works. API-first, with short-lived portal links that let your clients connect accounts while staying inside your product, and team-level separation of each tenant’s accounts, posts, and analytics. A dedicated white-label setup is listed among the Enterprise options.

Pricing. Per organization, by monthly post pool:

• Free: $0, 3 social accounts, 20 posts and 50 comments a month
• Pro: $100 a month, unlimited accounts, 10,000 posts and 5,000 comments a month, 14-day trial
• Business: $400 a month, unlimited accounts, 100,000 posts and 50,000 comments a month
• Enterprise: custom
• X usage is billed separately from prepaid credits at X’s rates

Pros: unlimited accounts on paid plans; one of the widest network lists here; a flat bill for large account counts; official MCP server, CLI, and SDK.

Cons: the jump from 3 free accounts to a $100 plan; analytics are a paid-plan feature; the formal white-label setup is an Enterprise conversation.

Best for: agencies with many accounts and moderate posting volume that want a single flat bill.

7. Upload-Post: the most-branded hosted connect page

Upload-Post is a posting API used by creators, agencies, and developers, covering 22 networks, a video editor API, and AI clip tools alongside publishing.

How the white label works. You generate a branded connect link per client profile, valid for 48 hours, with your logo, page title, description, language, redirect URL, button text, theme, network list, and any on-page text rewritten through ui_labels, eleven branding options in all. The page is hosted at app.upload-post.com/connect; Upload-Post’s own guide states there is no custom domain option and that the networks’ consent screens are not white-labeled.

Pricing. By profile, where a profile is one client with one account per platform. Prices below are the annual-billing rates the page shows by default, which it advertises as 40% below monthly billing:

• Free: $0, 2 profiles, 10 uploads a month
• Basic: $16 a month ($192 a year), 5 profiles
• Professional: $33 a month ($400 a year), 25 profiles, white label included
• Advanced: $118 a month ($1,411 a year), 75 profiles
• Business: $350 a month ($4,205 a year), 225 profiles, then $1 per extra profile
• Posting links on X is a $19 monthly add-on, up to 50 link posts

Pros: the most customizable hosted connect page; 22 networks; low per-client cost on annual plans; unlimited uploads on paid tiers.

Cons: white label starts at the Professional tier; no custom domain for the connect page; one account per platform per profile; the lowest prices assume an annual commitment.

Best for: agencies focused on short-form video across many networks that want a branded page with no front-end work.

White label social media APIs compared

What a white label social media API costs an agency

List prices only mean something against a real client book. Two worked examples, using each vendor’s published September 2026 rates, monthly billing unless the vendor only shows annual:

A 20-client agency: four networks per client (80 connected accounts), about 12 posts per account per month (960 platform posts).

A 100-client agency: five networks per client (500 connected accounts), about 12 posts per account per month (6,000 platform posts).

X usage is excluded throughout: every vendor either passes X’s per-post fee through, bills it as an add-on, or requires your own X developer app.

Read the tables for what drives each bill. Post-metered APIs (Outstand, bundle.social) are cheapest when clients post moderately and expensive when they post a lot. Per-client APIs (Ayrshare, Postproxy, Upload-Post) are cheapest when clients use one account per network and cost more for clients with several. Per-account APIs (PostZen, Zernio) are the most predictable, because the bill changes only when a client connects or removes an account, never with posting volume, and PostZen is the cheaper of the two up to about 185 accounts. For a large agency, PostZen’s per-account model is the most expensive option in this list, and that is the trade against the connect flow, the engagement features, and the unmetered posting described above.

How to choose a white label social media API

• You are building your own client dashboard and want one integration for publishing, engagement, and automation: PostZen. Headless connect, per-account pricing with unlimited posts, and the inbox, DMs, comment-to-DM, queues, and bulk CSV on one key.
• Clients must see your agency’s name on the OAuth consent screen: Outstand, with your own platform apps, and a developer to own their reviews.
• You want a hosted connect page you can email to clients, no front-end work: Ayrshare for the most mature option with a per-client price, Upload-Post for the most branding options on a budget.
• You have hundreds of accounts and moderate posting: bundle.social or Outstand for the lowest bill; Zernio if you want per-account billing and messaging channels at volume.
• You are an EU agency with one account per network per client: Postproxy.

Whichever you pick, test the reconnect flow before the first client goes live. A token will expire on a Friday night, and the difference between a good and a bad white-label API is whether your app hears about it through a webhook or your client hears about it through a failed post. The guide to managing multiple social media accounts covers the account structure and reconnect routine in detail, and our comparison of social media APIs covers the publishing side of the same vendors. For PostZen specifically, the social media API page lists the full surface, pricing has the plans, and the head-to-head pages compare it with Ayrshare and Zernio. Agencies selling engagement services will find the comment-to-DM automation guide useful too.