PostWireZernio vs Postiz: the facts side by side, and a third option
Both are APIs that publish to several social networks. Here is what each one bills, what it costs for an agency, its free plan, MCP server and refund — each cell read on the vendor's own page, with the link and the date — next to PostWire, which also writes each network's post.
Zernio read on Oct 9, 2026, Postiz on Oct 9, 2026. If they changed since, their pages win.
Zernio, Postiz and PostWire
| Zernio | Postiz | PostWire | |
|---|---|---|---|
| What you pay for | Connected social account — one profile on one platformzernio.com, Oct 9, 2026 | Channel (a connected social account), in plan tierspostiz.com, Oct 9, 2026 | One business (brand) — every network of that business included |
| Cheapest paid plan | $6 per account a month, after the first 2 freezernio.com, Oct 9, 2026 | $29 a month (Standard, 5 channels)postiz.com, Oct 9, 2026 | $9 a month (Starter, 3 businesses) |
| Free plan | Yes — the first 2 accounts, no cardzernio.com, Oct 9, 2026 | No free hosted plan — a 7-day trial on every planpostiz.com, Oct 9, 2026 | Yes — 1 business, 20 posts a month, the REST API and the MCP server, no card |
| 10 clients × 5 networks, a month | $168 — per accountzernio.com, Oct 9, 2026 | $99 — Ultimatepostiz.com, Oct 9, 2026 | $29 — Pro |
| Writes a different post per network from one idea | No — you send each platform's text (customContent)zernio.com, Oct 9, 2026 | Its FAQ: customize the message for each platform, or post the same content everywherepostiz.com, Oct 9, 2026 | Yes — one request returns a native post for every network |
| MCP server for AI agents | Hosted, OAuth or API keyzernio.com, Oct 9, 2026 | Hosted, OAuth sign-in, on every planpostiz.com, Oct 9, 2026 | Hosted, API key or OAuth 2.1 sign-in |
| Of the 10 networks PostWire publishes to, listed | 9 of 10 (not listed: Mastodon)zernio.com, Oct 9, 2026 | 10 of 10postiz.com, Oct 9, 2026 | 10 of 10 |
Where PostWire is ahead
- The lowest bill of the three for an agency. 10 clients on 5 networks: $29 a month on PostWire Pro, every network included. Zernio: $168; Postiz: $99.
- Per business, not per account. 10 businesses on 5 networks are $29 a month, and a sixth network costs nothing. Zernio bills each connected account — first 2 free, then $6, $3 and $1 each — so the same 50 accounts are $168.
- A free hosted plan, no card, no time limit, with the API and MCP. Postiz's hosted plans start at $29 a month after a 7-day trial.
- It writes the posts. One request returns a native version for each network from one idea. On Zernio you send the text for each post.
- No server and no app reviews to run. TikTok Direct Post (Jul 7, 2026) and Meta (Jul 14, 2026) are approved for PostWire's apps; you connect with one click. Self-hosting Postiz means your own developer apps, so TikTok's audit and Meta's review are yours to pass.
- A 14-day refund on every paid plan. Zernio's usage-based billing has no refunds.
Questions people ask
What is the difference between Zernio and Postiz?
Zernio bills connected social account — one profile on one platform; Postiz bills channel (a connected social account), in plan tiers. Cheapest paid plan: Zernio $6 per account a month, after the first 2 free, Postiz $29 a month (Standard, 5 channels). Each fact on this page links the vendor page it was read from and the date.
How much do Zernio and Postiz cost for 10 clients?
For 10 client businesses on 5 networks each: Zernio $168 — per account, Postiz $99 — Ultimate, read on their pricing pages. PostWire: $29 a month (Pro), every network included.
Is there an alternative to Zernio and Postiz?
PostWire is a posting API priced per business that also writes each network's post from one idea, in the same request that publishes — over REST, n8n, Make or its hosted MCP server. It has a free plan with the API and MCP (1 business, no card) and a 14-day refund on paid plans.
How do I move from Zernio or Postiz to PostWire?
Each has a switching kit with the field-by-field mapping and a converter that turns a request into PostWire's: https://postwire.io/migrate/from-zernio/ and https://postwire.io/migrate/from-postiz/.
Type one idea and see the post each network gets.
The demo on the home page writes live, with no account, and never publishes. The free plan covers one business — every network connects free, 2 networks per post — with no card and no time limit. Paid plans have a 14-day refund.