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What is Zernio?

Zernio is a unified social media API platform that enables developers and AI agents to publish, schedule, and manage content across 14+ social networks through a single integration. Instead of building and maintaining separate integrations with each platform's API, developers make one API call and Zernio handles authentication, media formatting, rate limits, and platform-specific requirements. The platform supports Instagram Business and Creator APIs, TikTok Business API, LinkedIn Company and Personal APIs, YouTube Data API, Twitter/X API, Facebook Graph API, Meta Business Suite, Pinterest API, Google My Business API, Reddit API, Threads API, Bluesky API, and WhatsApp Business API. Key capabilities include post scheduling and publishing, content management across all platforms, comments and DMs automation, analytics tracking, ads management, media upload and management, webhook notifications, rate limit management, and automatic token refresh. Zernio is designed for developers and technical teams building products that require social media functionality, including SaaS companies embedding social features into their own products, agencies managing client accounts at scale, and AI agent builders who need programmatic social posting. The product is white-label, meaning end users never see Zernio branding. Developer-friendly SDKs and comprehensive API documentation support fast implementation, reducing integration time from months to under an hour. A free version and free trial are available, with usage-based pricing.

What is PostFast?

PostFast is an all-in-one social media scheduling platform designed to save users significant time by automating content posting across a wide range of social networks. Compatible with Instagram, TikTok, LinkedIn, Twitter (X), Facebook, BlueSky, and YouTube, it allows users to schedule posts, stories, reels, and video content from a single, user-friendly interface. The platform supports advanced features such as carousel posts, a visual content calendar, and Instagram-specific analytics to track engagement and optimize strategies. PostFast is ideal for teams and agencies, offering workspaces to organize accounts, role-based permission controls, and smart approval workflows to ensure consistent, high-quality publishing. Real-time collaboration tools enable team members to comment, share notes, and streamline the content creation process. The white-label solution lets agencies customize branding for client presentations, and a powerful REST API facilitates automation and integration with other tools. Pricing tiers range from individual creators to large agencies, accommodating varying needs with flexible plans and a 7-day free trial. Trusted by over 115 digital agencies, PostFast combines simplicity with powerful features to enhance social media marketing efforts. Its clean design and reliable performance make scheduling and managing posts effortless. Ultimately, PostFast empowers users to focus on content creation while the platform handles distribution and analytics.

Media

Media

Integrations Supported

Bluesky
Facebook
Instagram
LinkedIn
TikTok
X (Twitter)
YouTube
Brainpercent
Claude Code
Cursor
Google Business Profile
Grok Bot
OpenAI Codex
OpenClaw
Pinterest
Reddit
Snapchat
Telegram
Threads
WhatsApp

Integrations Supported

Bluesky
Facebook
Instagram
LinkedIn
TikTok
X (Twitter)
YouTube

API Availability

Has API

API Availability

Has API

Pricing Information

$19/month
10 Social Sets
120 Posts/month
Tools API - 50/day
Free Version
Free Trial Offered?

Pricing Information

€9/month
Free Trial Offered?

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Not specified

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Zernio

Date Founded

2025

Company Location

Spain

Company Website

zernio.com/

Company Facts

Organization Name

PostFast

Company Location

Bulgaria

Company Website

postfa.st/

Categories and Features

SMS API

Not specified

Unified APIs

Not specified

Categories and Features

Social Media Management

Automated Publishing
Content Management
Multi-Account Management
Multi-User Collaboration
Post Scheduling
Reporting/Analytics

Popular Alternatives

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