Mastodon and postiz occupy different layers of the social media stack: Mastodon is a free, open-source social network you post to, while postiz is a paid…
Best for Mastodon: Mastodon fits people and organizations who want to own and self-host their social presence on an ad-free, chronological, federated network, with official iOS and Android apps for day-to-day posting.
Best for postiz: postiz fits teams that need to schedule and manage posts across Threads, LinkedIn, Google Business Profile, Instagram, X, and Bluesky from one dashboard, including AI agents that schedule posts programmatically via its dedicated CLI.
At a Glance
Mastodon
postiz
Primary category
Social Media
Social Media
Rating
Not documented
Not documented
Pricing model
Open Source
Open Source
Starting price
Free (self-hosted); joining an existing server is free
Free (self-hosted); hosted plans start at $29/month
Free plan
Not documented
Not documented
Free trial
Not documented
Not documented
Platforms
Web, iOS, Android
Not documented
Team collaboration
Not documented
Not documented
AI features
Not documented
Yes
Public API
Not documented
Not documented
Key Differences
Product Category
Mastodon: Mastodon is the social network itself — a federated, ActivityPub-based microblogging platform.
postiz: postiz is a scheduling and management layer that sits on top of other social networks, not a network of its own.
The two tools solve different problems and are typically used together rather than as alternatives to each other.
Pricing
Mastodon: Mastodon is completely free and open-source, funded by donations and sponsors.
postiz: postiz is paid, starting at $29/month (Standard plan) with a $39/month Team plan, and offers a free trial.
Mastodon has zero licensing cost, while postiz is a recurring subscription cost tied to team size and usage.
Documented Platform Coverage
Mastodon: Mastodon interoperates with the wider ActivityPub fediverse but is not built to post to closed platforms like Instagram or LinkedIn.
postiz: postiz documents support for Threads, LinkedIn, Google Business Profile, Instagram, X, and Bluesky, each with platform-specific post formats such as Reels, Carousels, and Articles — Mastodon is not listed among its supported platforms.
Teams wanting a single dashboard to schedule to Mastodon alongside other networks won't find that documented in postiz today.
AI-Agent Scheduling
Mastodon: Mastodon does not document any AI-agent scheduling or CLI tooling.
postiz: postiz exposes a dedicated CLI built specifically for AI agents to schedule and manage social posts programmatically, separate from its human dashboard.
Teams automating posting through AI agents have a purpose-built integration path only with postiz.
Self-Hosting
Mastodon: Mastodon is fully self-hostable, giving the operator complete control over their instance and data.
postiz: postiz's facts do not document a self-hosted deployment option; it is presented as a hosted paid product.
Organizations requiring full data ownership of their posting infrastructure only have that option with Mastodon.
Feature-by-Feature
Core Purpose
Feature
Mastodon
postiz
Social network / posting destination
Available
Unavailable
Multi-account scheduling dashboard
Unavailable
Available
Platform-specific post formats (Reels, Carousels, Articles)
Not documented
Available
Access & Automation
Feature
Mastodon
postiz
Free to use
Available
Unavailable
AI-agent CLI for programmatic scheduling
Not documented
Available
Self-hosted deployment
Available
Not documented
Reach & Access
Feature
Mastodon
postiz
Federated / ActivityPub interoperability
Available
Not documented
Documented support for Threads, LinkedIn, GBP, Instagram, X, Bluesky
Not documented
Available
Official mobile apps
Available
Not documented
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Interoperates with a broader ecosystem of Fediverse apps
Cons
Fragmented experience across instances can be confusing for new users
Discovery and content reach are weaker than algorithmically-optimized platforms
Self-hosting requires technical skill and ongoing infrastructure cost
Monthly active users are far smaller than mainstream competitors like X or Threads
Instance-hopping and moderation inconsistency can create a less unified experience
postiz
Pros
Free to self-host under an open-source AGPL-3.0 license, with full code transparency
Broad network coverage, including newer and niche platforms like Bluesky, Mastodon, and Warpcast
Built-in AI drafting and media generation reduce the need for separate content tools
API, webhooks, CLI, and MCP server make it friendly to developers and AI-agent workflows
Active open-source development with frequent public releases on GitHub
Cons
Self-hosting requires technical setup and ongoing server maintenance
Hosted plans gate channel count and AI credits fairly tightly at lower tiers
Younger product than incumbents like Buffer or Hootsuite, so some enterprise features and integrations are still maturing
Support is primarily community and documentation based for self-hosted users rather than dedicated account management
Small operating team behind the hosted SaaS product may affect response times for support requests
Use Cases
Choose Mastodon: Mastodon fits people and organizations who want to own and self-host their social presence on an ad-free, chronological, federated network, with official iOS and Android apps for day-to-day posting.
Choose postiz: postiz fits teams that need to schedule and manage posts across Threads, LinkedIn, Google Business Profile, Instagram, X, and Bluesky from one dashboard, including AI agents that schedule posts programmatically via its dedicated CLI.
Need both: A brand could maintain a self-hosted Mastodon presence for direct community engagement while using postiz to schedule and manage posts across its other accounts (LinkedIn, X, Instagram, Bluesky, Threads, Google Business Profile) — though Mastodon posts themselves would still need to be handled outside postiz since it isn't a documented supported platform.
Mastodon
Decentralized public social networking — An individual joins a Mastodon instance aligned with their interests to post and follow others across the federated network.
Community or organizational instance hosting — An organization or interest group self-hosts its own Mastodon instance to create a moderated community space under its own rules.
Brand or public figure presence in the Fediverse — A publication or public figure maintains a presence on Mastodon to reach audiences seeking non-algorithmic, decentralized platforms.
postiz
Self-hosted agency scheduling — Marketing agencies deploy Postiz on their own servers to manage client social calendars with full data control and no per-seat SaaS fees.
AI-agent-driven content pipelines — Development teams use Postiz's API, webhooks, and MCP server to let AI agents draft, generate media for, and schedule posts automatically.
Multi-network brand publishing — Small businesses and creators schedule and cross-post content across 30+ networks from a single calendar instead of switching between platforms.
Frequently Asked Questions
Does postiz support scheduling posts to Mastodon?
This is not documented. postiz's listed platforms are Threads, LinkedIn, Google Business Profile, Instagram, X, and Bluesky; Mastodon is not among them.
Is Mastodon free to use?
Yes. Mastodon is entirely free and open-source software, sustained by donations rather than paid tiers.
How much does postiz cost?
postiz starts at $29/month on the Standard plan, with a Team plan at $39/month, and offers a free trial.
Does postiz support AI agents scheduling posts?
Yes. postiz exposes a dedicated CLI built specifically for AI agents to schedule and manage social posts programmatically.
Can I self-host Mastodon like I might self-host other tools?
Yes. Mastodon can be fully self-hosted for complete control over data and moderation, or you can join an existing public instance such as mastodon.social.
Are Mastodon and postiz used for the same purpose?
No. Mastodon is a social network you post to directly, while postiz is a paid dashboard for scheduling and managing posts across other networks like LinkedIn, X, and Instagram.