Both are open and self-hostable. They’re still built for different work.
Postiz is a place you run: a calendar, an AI writer, analytics, team approvals — all AGPL-3.0, all yours to self-host on a single Docker host. That’s a generous, genuinely good product, and its public REST API and postiz-agent CLI are real — you can absolutely drive it from code or an agent.
Social Fanout starts from the call. There’s no app and no calendar because the thing posting is your software or an agent. You connect each account once, then a single POST /v1/publish fans out to up to 20 targets and returns a receipt per target.1 The product is the API — and on the hosted path we carry the OAuth and platform app-review burden so there’s nothing for you to operate.
So the table below isn’t a list of things Postiz “can’t do.” It’s the most evenly matched comparison on this site. The real differences are narrow and specific: a one-call fan-out with structured receipts, a far lighter footprint, managed provider approvals, and pricing and licensing that stay out of the way when you embed.
Where each one actually wins
Compared on publicly documented capabilities, verified June 2026.1
| Capability | Fanout | P Postiz |
|---|---|---|
| Publish from an API | REST · POST /v1/publish | REST API + Node SDK |
| One call fans out to many targets, with receipts | per-integration · scheduling model | |
| Fully open-source codebase | hosted API + self-host layer | AGPL-3.0 |
| Self-hostable | YES · lightweight | YES · full stack |
| Footprint to self-host | an API layer | Postgres · Redis · Temporal · app |
| Agent / MCP server | YES · local | YES · agent CLI + MCP |
| Managed OAuth & platform app-review | YES · hosted | self-host: yours to run |
| Scheduling UI, AI writer, analytics & teams | via API only | |
| Networks | 12 destination types | 15+ (markets 30+) |
| White-label / embed | YES · credential-fronted | AGPL-3.0 copyleft |
| Pricing | Free · $10 / $19 / $49 flat | Self-host free · cloud $29–$99 by channel |
Read it straight. Postiz’s calendar, AI writer, analytics, team workflow, wider channel list and fully-open codebase are real advantages a bare API doesn’t have. Our edge is narrower and specific — the one-call fan-out with per-target receipts, a near-zero-ops footprint, managed provider approvals, and pricing and licensing that don’t get in the way when you embed.
A platform to run, or a call to make
P POSTIZ
- Stand up the stack (Postgres, Redis, Temporal) — or sign in to cloud
- Connect each channel in the dashboard
- Compose on the calendar, lean on the AI writer
- Schedule — or drive it via the REST API /
postiz-agent
SOCIAL FANOUT
If a person is composing — and you want a calendar, an AI assistant and a place to sit inside — Postiz is excellent, hosted or self-run. If software composed it, you want the one request: fanned out, with a receipt for each target, and no platform to keep alive.
We’re not going to pretend
You want to own a complete, self-hostable platform for free — calendar, AI writer, analytics, team approvals and the widest channel list — and you’re happy to run Postgres, Redis and Temporal (or pay cloud per channel). Social Fanout deliberately ships none of that UI; it’s the call, not the console. For a team that wants to host its own scheduling app, Postiz is the stronger pick.
Plenty of setups run both — Postiz for human, calendar-driven scheduling; Social Fanout the moment publishing has to happen inside a product or an agent’s loop, with a receipt per target and no infrastructure to babysit. One thing to weigh on the open-source side: if you plan to embed or modify Postiz inside a closed product you distribute or expose over a network, factor in AGPL-3.0’s reciprocal-source terms — Social Fanout’s white-label is credential-fronted and carries no copyleft.
Notes & sources
- Reflects publicly documented features, verified June 2026, offered in good faith. Postiz is open-source under AGPL-3.0 and ships real API, agent and self-host paths; vendors change pricing and features often — check each vendor’s own site before deciding. Sources: github.com/gitroomhq/postiz-app, docs.postiz.com, postiz.com.