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PostZen

The Zernio Alternative With Flat, Predictable Plans

An agency with 30 client accounts pays $79/month on PostZen Pro. Zernio's per-account rate prices the same 30 accounts at $108/month.

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// Simple API key authentication
fetch('https://api.postzen.dev/v1/posts', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer POSTZEN_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    platforms: ['instagram', 'twitter', 'linkedin'],
    content: 'Hello world!'
  })
})

Why Switch?

Why PostZen vs Zernio?

PostZen API

PostZen

  • Flat plans with included accounts

    Starter, Pro, and Scale include 5, 20, or 100 accounts. Extra accounts are $3 each per month.

  • Cheaper from 10 to about 185 accounts

    10 accounts cost $34 on PostZen and $48 on Zernio. 20 cost $49 versus $78. 100 cost $149 versus $318.

  • Published rate limits and SLA

    60 to 2,000 requests per minute by plan and a 99.97% uptime SLA. Zernio publishes neither.

  • Client-facing calendar

    A scheduling UI for the people who approve posts, alongside the API.

  • Bulk CSV import and queues

    Import a month of posts from a spreadsheet or fill recurring time slots without writing code.

Zernio

Zernio logo

  • Two free accounts

    No credit card, and unlimited posts on the free accounts.

  • Per-account bands

    $6 each for accounts 3 to 10, $3 each for 11 to 100, $1 each from 101 up.

  • 16 social platforms plus 7 ad networks

    Adds Reddit, WhatsApp, Discord, Snapchat, and Google Business, and an ads API.

  • Unified inbox

    Comments and DMs, free to 10,000 messages a month, then metered.

  • Eight SDK languages

    Node, Python, Go, Ruby, Java, PHP, .NET, and Rust are listed.

  • Phone, SMS, and calls

    Metered add-ons that sit outside social publishing.

Feature Comparison

Side By Side

Feature comparison between PostZen and Zernio
PostZenZernio
Free tier2 accounts, 20 posts/month, full API2 accounts, unlimited posts, no card
Pricing unitFlat plan with included accounts, $3 per extraPer connected account in three bands
10 accounts$34/mo (Starter + 5 extras)$48/mo
30 accounts$79/mo (Pro + 10 extras)$108/mo
100 accounts$149/mo (Scale)$318/mo
500 accounts$1,349/mo (Scale + 400 extras)$718/mo
Platforms1016 social plus 7 ad networks
Inbox (comments and DMs)NoYes, metered above 10,000 messages
X API costsPassed through at costPassed through at cost
Rate limits60 to 2,000/min (published)Not published
Uptime SLA99.97% (published)Not published
Client-facing UICalendar includedDashboard only
MCP serverYes, OAuth consentYes, hosted

Pricing

Pricing comparison between PostZen and Zernio
PostZenZernioWinner
2 accountsFree (20 posts/month)Free (unlimited posts)Zernio, if you publish more than 20 posts a month on two accounts
5 accounts$19/mo (Starter)$18/moEven
10 accounts$34/mo (Starter + 5 extras)$48/moPostZen
30 accounts$79/mo (Pro + 10 extras)$108/moPostZen
100 accounts$149/mo (Scale)$318/moPostZen
200 accounts$449/mo (Scale + 100 extras)$418/moZernio, by $31; the curves cross near 185 accounts
500 accounts$1,349/mo (Scale + 400 extras)$718/moZernio. Talk to us about volume pricing at this scale

At a glance

Which one is right for you?

PostZen

Pick PostZen When

  • Run 10 to about 185 connected accounts
  • Want a fixed monthly fee you can resell
  • Need published rate limits and an uptime SLA
  • Want a calendar UI for clients alongside the API
  • Import posts in bulk from CSV
  • Publish across the 10 major networks
  • Prefer a smaller, focused API surface
Zernio logo

Pick Zernio When

  • Publish to Reddit, WhatsApp, Discord, Snapchat, or Google Business
  • Need comments and DMs through the same API
  • Run ads through the same vendor
  • Have two accounts and publish more than 20 posts a month for free
  • Run more than roughly 185 connected accounts
  • Want SDKs in Go, Ruby, Java, PHP, .NET, or Rust
  • Prefer pure per-account metering

FAQ

Common questions

Is Zernio cheaper than PostZen?

It depends on account count. Zernio is free for two accounts with unlimited posts and costs $18 for five. PostZen is cheaper from about 10 accounts ($34 versus $48) through 100 ($149 versus $318). Zernio’s $1 band makes it cheaper again above roughly 185 accounts.

What does Zernio offer that PostZen does not?

Six more social networks (Reddit, WhatsApp, Discord, Snapchat, Google Business, and Slack in its docs), an ads API across seven networks, a unified inbox for comments and DMs, phone and SMS add-ons, and SDKs in eight languages.

What does PostZen offer that Zernio does not?

Flat plans with included accounts and unlimited posts, published rate limits from 60 to 2,000 requests per minute, a 99.97% uptime SLA, a client-facing calendar, bulk CSV import, and queue-based scheduling.

Do both pass through X API costs?

Yes. X bills per API request since February 2026, and both Zernio and PostZen pass those charges through at X’s rates. Connecting an X account on PostZen requires a card on file for that reason.

Can I migrate from Zernio to PostZen?

The request shapes are similar: connect accounts through a hosted OAuth page, upload media, then create posts with a platforms array. Most integrations move in an afternoon. Accounts must be reconnected because OAuth grants are per vendor.

Which platforms does PostZen support?

Instagram, X, LinkedIn, Facebook Pages, Threads, YouTube, TikTok, Pinterest, Bluesky, and Telegram. Zernio covers those plus Reddit, WhatsApp, Discord, Snapchat, and Google Business.

Compare Zernio with PostZen on your own numbers

Count your connected accounts. Between 10 and about 185 of them, PostZen costs less and includes unlimited posts. Create a free account without a credit card and try the API today.

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