Best Social Media Scheduling APIs Compared (2026)

The choice is not obvious

The case for using a unified social media API rather than building direct integrations yourself is clear. The choice of which API is not.

Postproxy, Ayrshare, and Zernio (formerly getlate.dev) all offer some form of unified social publishing. They differ significantly in pricing model, platform coverage, automation integrations, failure handling, and who the product is actually designed for.

This comparison covers the landscape as of mid-2026. Postproxy publishes it — we are one of the options being evaluated. Where other tools have genuine advantages, they are noted.

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What dimensions should you evaluate when comparing social media APIs?

Platform count. Most tools cover the core set (X, Instagram, LinkedIn, Facebook, Threads, TikTok, YouTube), and Pinterest, Bluesky, and Google Business Profile are now standard too. They differ on the long tail — Reddit, Snapchat, Telegram, and messaging channels like WhatsApp and Discord.

Pricing model. Per-profile and per-connected-account pricing scale with every account added — manageable at small counts, hard to forecast when your users connect accounts themselves. Flat plan pricing is easy to budget because the bill is a number you chose, not a function of user behavior.

Per-platform failure reporting. When a request to six platforms produces four successes and two failures, does the API tell you which two failed and why? Or does it return a single status? For automated workflows, this distinction determines how much error-handling logic you own.

Test environment. Can you develop against the API without connecting real social accounts? A sandbox shortens the integration loop — no OAuth setup on every platform, no test posts landing on production profiles, no burned post quota while you debug.

Automation integrations. Native n8n and Zapier nodes reduce setup friction. A Model Context Protocol (MCP) server matters if you are building AI agent workflows.

Rate limits. API call limits sized for human-paced scheduling workflows can become a bottleneck in high-frequency automated pipelines.

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Postproxy

Postproxy is a unified API covering the full publishing cycle through a single key: scheduling and publishing, reading and replying to comments and DMs, review management, profile analytics, and webhook events. Reliability is the design priority: transient platform errors are retried automatically, partial success is reported per platform instead of collapsed into a single error, and the n8n node and MCP server are first-party rather than community-maintained. Pricing is flat by plan — post volume and profile groups, not per connected account — which keeps the math predictable as automated workflows fan out across many accounts.

Platforms: Instagram, Facebook, Threads, TikTok, X (Twitter), YouTube, LinkedIn, Pinterest, Bluesky, Telegram, Google Business Profile — 11 platforms.

Pricing:

Plan	Price	Posts/month	Profile Groups
Free	$0	10	2
Build	$17/mo ($12/mo annual)	120	10
Grow	$49/mo ($35/mo annual)	Unlimited	20
Scale	$99/mo ($79/mo annual)	Unlimited	50
Enterprise	$699/mo ($559/mo annual)	Unlimited	500

Pricing is by post volume and profile group count — not per individual social account. This matters if you manage many accounts per brand or publish to many accounts from automated workflows: a profile group holds up to 11 connected platforms, so the Scale plan covers up to 550 connected accounts at $99/month. The Scale plan can also be stacked: subscribe multiple times to multiply profile group capacity, instead of jumping straight to Enterprise.

Developer sandbox: Included on every plan. Sandbox profile groups hold simulated accounts on all 11 platforms — connected in one click, no OAuth flow, no real social accounts. Sandbox posts go through the same API surface and return realistic per-platform responses, post IDs, stats, and comments, but never reach a real platform and don’t count against plan limits. In practice this makes integration work several times faster: you test publishing, error handling, and webhooks in minutes instead of setting up test accounts on every network and burning real posts to debug.

Per-platform failure reporting: Yes. Each platform in a request returns an individual status. Partial success is a first-class result, not an error state. Your system knows exactly what succeeded, what failed, and why without parsing a combined error.

Automation: Native n8n node, MCP server for AI agent integration, Zapier support, webhooks on Build and above.

Auth: API key. OAuth flows to each platform are handled on the infrastructure side; you access everything through your key. By default users connect through Postproxy’s platform apps, so there are no app reviews on your side. Full BYOK (bring your own keys) is also supported — connect users through your own platform apps for a fully branded OAuth experience where every consent screen shows your name.

Rate limits: Postproxy does not impose its own rate limits — the post allowance on your plan is the only constraint.

Weakness: Eleven platforms vs Ayrshare’s thirteen — if you need Reddit or Snapchat today, that is a real constraint. A dashboard exists for connecting profiles, composing and scheduling posts, and inspecting activity, but Postproxy is API-first — engineering effort goes into the API surface, not the calendar UI. If your team’s primary need is a polished content calendar app for non-technical users, a dashboard-led product will fit better.

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Ayrshare

Ayrshare is the most established developer-facing option in this space, predating most alternatives. It supports the widest platform set and has an active developer community.

Platforms: 13 — LinkedIn, Instagram, X, Facebook, YouTube, Bluesky, Threads, Pinterest, Reddit, Telegram, TikTok, Google Business Profile, Snapchat.

Pricing:

Plan	Price	Profiles
Premium	$149/mo	1 profile/brand
Launch	$299/mo	Up to 10 profiles
Business	$599/mo	30 profiles; then $8.99/profile up to 100, $3.49 up to 500, $2.49 beyond
Enterprise	Custom	Thousands

Per-profile pricing is the dominant model. At low profile counts it is manageable. At scale — agencies, multi-tenant SaaS products, automated workflows touching many accounts — it compounds quickly.

Per-platform failure reporting: Yes. The post response includes a postIds array with a status and id per platform, and an errors array with per-platform failure details including error code, message, and platform identifier. This is well-designed for automated error handling.

Automation: SDKs for Node.js and Python. Zapier integration. n8n is not natively supported — use via HTTP request node. No MCP server documented.

Auth: API key. The Business plan adds multi-user/multi-tenant management for SaaS use cases.

Rate limits: “Expanded API rate limits” on Launch tier and above vs. Premium, but exact numbers are not published.

Weakness: Pricing model is the primary friction. A SaaS product with multi-tenant social publishing, or an agency managing dozens of brands, hits expensive territory quickly on per-profile pricing. No native n8n or MCP integration.

Full head-to-head: Ayrshare vs Postproxy.

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Zernio (zernio.com)

Zernio (formerly getlate.dev) is a developer-first scheduling API with broad reach: 12 social platforms plus messaging channels and ad network management. Every feature is included at every level — the variable is how many accounts are connected.

Platforms: 12 social — X/Twitter, Instagram, TikTok, LinkedIn, Facebook, YouTube, Threads, Reddit, Pinterest, Bluesky, Snapchat, Google Business — plus WhatsApp, Telegram, and Discord messaging, and six ad networks.

Pricing: Per connected social account, graduated:

Connected accounts	Price per account/month
1–2	Free
3–10	$6
11–100	$3
101–2,000	$1
2,001+	Custom

Posts are unlimited and all features are included. X/Twitter API calls carry pass-through charges on top ($0.005–$0.200 per request depending on call type), and WhatsApp requires a dedicated phone number from $2/month.

The catch is predictability. Your bill is not a plan you chose — it is a function of how many accounts are connected at any given moment. For a multi-tenant SaaS where users connect their own accounts, every signup moves the invoice, and a burst of signups (including users who connect accounts and then churn) generates charges you did not budget for. The X pass-through fees add per-request variance on top: forecasting your cost means forecasting both account growth and API call volume.

Per-platform failure reporting: Yes. The API returns per-platform results with failure detail for each target.

Automation: Official n8n community node. MCP server for AI agent integration. Webhooks supported.

Auth: API key. Users connect their social accounts via OAuth; the API uses bearer token authentication.

Weakness: The pricing model. Per-account billing is cheap to start and hard to forecast at scale — 150 connected accounts run roughly $368/month and 550 accounts roughly $768/month, where a flat-plan competitor covers both counts at one price. Add the X pass-through fees and the monthly bill depends on user behavior you do not control.

Full head-to-head: Zernio vs Postproxy.

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Comparison table

	Postproxy	Ayrshare	Zernio
Platforms	11	13	12 social (+ messaging, ads)
Starting price	$0 free	$149/mo	Free (1–2 accounts)
Pricing model	Flat plans: volume + profile groups	Per-profile	Per connected account (graduated)
Unlimited posts from	$49/mo	N/A	Included, but bill grows per account
Predictable monthly bill	Yes — fixed by plan	Grows per profile	Grows per account + X pass-through fees
Developer sandbox	Yes — all platforms, free	Not documented	Not documented
Per-platform failure detail	Yes	Yes	Yes
n8n native	Yes	No	Yes
MCP server	Yes	No	Yes
Zapier	Yes	Yes	Yes
Developer-first	Yes	Yes	Yes

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How do you choose the right social media scheduling API?

Use Postproxy if you are building automated publishing workflows, need explicit per-platform failure reporting, want a sandbox to develop against before connecting real accounts, use n8n or AI agents in your stack, or want flat pricing that does not scale with profile count.

Use Ayrshare if you need the broadest platform coverage (especially Reddit or Snapchat) and per-profile pricing fits your scale.

Use Zernio if you need platforms nobody else covers — WhatsApp, Discord, Reddit, Snapchat — or unified ads management, and your connected account count is small and stable enough that per-account billing stays predictable.

If you arrived here from Buffer specifically, see Buffer API alternatives for developers — Buffer’s API is gated to higher-tier plans, and that guide walks through the programmable replacements.

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Scheduling tool vs publishing infrastructure

The most useful lens for choosing is understanding whether you need a scheduling product or publishing infrastructure.

Scheduling products are designed for human content teams. The API exists to feed a content calendar. They work for automated use cases, but rate limits, pricing tiers, and API design reflect human-paced usage as the primary model.

Publishing infrastructure is designed for systems. The API is the product. Error handling is precise because automated pipelines need to act on failure data. Partial success is explicit because “five platforms succeeded, one failed” is a different operational state than “everything failed.”

Most teams building automation end up wanting infrastructure. Most teams giving a content team a scheduling tool with API hooks end up fine with either.

Start publishing programmatically with the Postproxy API.