vs
The Postiz alternative with the full social layer
Postiz is a creator dashboard with a public API attached - capped at 100 requests per hour. Zernio is an API and MCP server engineered for production: 1200 req/min, 99.97% uptime SLA, webhooks on every plan.
- No credit card required
- SOC 2 + GDPR
- Comments, DMs, Analytics & Ads included
Join 200,000+ of the world's most ambitious developers and builders
One runs the whole operation. Another publishes.
What each tool does best
What you get with Zernio
1200 req/min rate limit (~72,000/hour) - published
99.97% uptime SLA with public status page
MCP server included - drop into any AI agent
Ads API across 8 networks (Meta, Google, TikTok, LinkedIn, Pinterest, X, OpenAI Ads, Reddit Ads)
Webhooks on every plan - no upgrade required
One auth model, one request shape across 16 platforms
What Postiz adds (if you're a creator, not an integrator)
Canva-like visual editor
AI Copilot + image/video gen - gated to Team plan and up
In-app calendar and team seats - for human users, not API callers
Self-hosting option - you own ops, OAuth rotation, platform breakage
100 req/hour API cap (cloud) - fine for hobby, not for SaaS
No Ads API, no MCP server, no published uptime SLA
Zernio vs Postiz
| Feature | Zernio | Postiz |
|---|---|---|
| API rate limit | 1200 req/min (~72,000/hr) | 100 req/hour (cloud) |
| Uptime SLA | 99.97% guaranteed | Not published |
| MCP server | 280+ tools | 9 tools (publish only) |
| Comments & DMs API | Yes | No |
| Ads API | 8 networks | No |
| Webhooks | All plans | Available |
| AI content generation | Not included | AI Copilot, image & video gen |
| Visual editor | Not included (API-only) | Canva-like editor |
| Setup time | 30 seconds | Minutes (cloud) or hours (self-hosted) |
| Pricing model | Per-account, no cliffs | Channel-locked tiers |
The 720x gap
Postiz's documented API rate limit is 100 requests per hour on cloud. Zernio's is up to 1200 requests per minute - about 72,000 per hour. If you're building anything with real traffic, that single number ends the comparison.
For any integration that posts more than once a minute per account, Postiz's 100 req/hour cap makes the headline price irrelevant.
Built for content vs built for the whole social layer
If you're building an AI agent that acts on social, the MCP server is your entry point. Postiz's MCP server is built for content production: generate, schedule, publish. Zernio's 280+ tools cover the full social and messaging layer: publishing, comments, DMs, analytics, and ads.
| MCP capability | Zernio | Postiz |
|---|---|---|
| Tools exposed | 280+ | 9 |
| Publish & schedule | Yes | Yes |
| Generate images/video | Via your own model | Yes (built in) |
| Read/reply to comments | Yes | No |
| Send DMs | Yes | No |
| Pull analytics | Yes | No |
| Manage ads | Yes | No |
What you pay as you grow
| Scale | Zernio | Postiz | Winner |
|---|---|---|---|
| 2 accounts, solo dev | Free | $29/mo (Standard, no team seats, no AI) | Zernio |
| 10 accounts, want webhooks + team | $48/mo, full feature set | $39/mo Team (no analytics on smaller plans, capped 100 req/hr) | Zernio (no cliffs, no caps) |
| 31 accounts | $111/mo (smooth pricing) | $99/mo Ultimate, forced jump from $49 | Zernio (no tier cliff) |
| 100 accounts | $318/mo, every feature | $99/mo capped at 100 req/hr, no SLA | Postiz looks cheaper, until you hit the rate limit on day one |
| 500 accounts | $718/mo | Custom, Ultimate maxes at 100 | Zernio (Postiz can't price this without a sales call) |
For any integration that posts more than once a minute per account, Postiz's 100 req/hour cap makes the headline price irrelevant.
An API product vs an API bolted on
Zernio API (2023+)
Launched 2023 as an API product, 2+ years in production
Unified REST: one request shape across 16 platforms
Rate limits: 60-1200 req/min, published per endpoint
99.97% uptime SLA with public status page
MCP server for AI agents
OpenAPI 3.1 spec, LLM-friendly docs
Production-grade for SaaS
Postiz: API bolted on (2024)
Public API shipped 2024 alongside a UI-first creator app
Platform-specific endpoints, not unified
Rate limit: 100 req/hour cloud, 90/hour self-hosted
No published uptime SLA, community-supported
MCP server with 8 tools
No Ads API
Secondary feature on a UI product
Which one fits your use case
SaaS embedding social posting
You're shipping a feature in your product that posts on behalf of customers. You need predictable rate limits, an SLA, and webhooks.
Winner: Zernio ✓
1200 req/min, 99.97% SLA, webhooks on every plan. Postiz caps at 100 req/hour.
AI agent that posts on command
You're building an agent (Claude, Cursor, internal copilot) that schedules content as a tool call.
Winner: Zernio ✓
Zernio ships an MCP server. Postiz has none.
Agency platform with ads + organic
You manage 30-100 client accounts and need both organic posting and ad campaign control.
Winner: Zernio ✓
Zernio includes Ads API across 8 networks. Postiz has no Ads API.
Internal creator tool for one brand
You want a finished UI, AI image gen, and a calendar, not an API.
Winner: Postiz ✓
If you don't need an integration, you don't need Zernio. Postiz ships the dashboard you'd otherwise build.
"Open source" means you're on call
Postiz being open source is real, and it sounds free. The hidden bill: you maintain the OAuth apps for 30+ platforms, you patch when Meta or TikTok ship breaking changes, you wake up when your queue jams, you handle token refresh and rate-limit backoff. Zernio's whole reason for existing is that we do that so you don't. If you wanted to be in the social-API maintenance business, you wouldn't be reading a comparison page.
Self-hosting Postiz makes sense for one team: people who want to build Postiz, not use it.
Which One?
Choose based on your priorities
You're a fit for Zernio if you:
Need production-grade managed API
Want 99.97% uptime SLA guarantee
Require instant API access (30 sec)
Building SaaS or commercial tools
Value transparent, published rate limits
Need Comments, DMs, Analytics, and Ads in one integration
Use AI agents and want MCP server support
You're not a fit for Zernio (and that's fine) if you:
Are a solo creator looking for a posting dashboard, not an API
Want a Canva-like editor built into the tool
Are happy to host, patch, and maintain a Node app yourself
Don't need an SLA, webhooks at scale, or an Ads API
Post less than 100 times an hour across your whole account base
Frequently Asked Questions
vsShip the integration this week.
Free up to 2 accounts. No card. 30 seconds to your first API call. 99.97% SLA from the first request.
- SOC 2
- GDPR compliant
- 99.97% uptime
- Under 50ms response