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Postmill AI
What it is
Postmill AI is an AI-native platform for writing, designing, scheduling, publishing, replying, and reporting across social, chat, blog, and email channels. The maker lists 45 channels. Its composer adapts one draft by channel, with previews, format overrides, brand-voice rewrites, and preflight checks. The design studio includes a canvas, layers, brand kits, a five-track video timeline, and 36 generation studios. Scheduling offers a visual calendar, timezone-aware recurring slots, auto-post queues, CSV bulk import, and retries after network interruptions. Daily metric snapshots and replies from 19 channels appear in one inbox with AI-drafted responses. Writing and replies can use 30 model providers on customers’ own keys, without credit packs, AI seat fees, or markup. The core is AGPL-3.0 open source and can be self-hosted free on customer hardware. Plans range from a free option and a 30-day trial to monthly Starter, Pro, Team, and Agency tiers.
For and against
For
- AI writing and content repurposing
- Automatic publishing and approval workflows
- Visual scheduling with recurring slots
- Self-hosted AGPL-3.0 core
- Official OAuth and encrypted secrets
Against
- Starter limits one seat and three channels
- Paid plans bill monthly
- Agency costs $249 a month
- AI runs on customer-provided keys
The verdict
Postmill AI covers creation, design, scheduling, publishing, inbox work, and analytics in one platform. Its free and self-hosted routes broaden access, while paid tiers add seats, channels, storage, and agency capacity.
Who it suits
Postmill AI fits individuals, teams, and agencies managing client brands in one workspace. Self-hosting suits organizations that want data kept within their own infrastructure.
Plans and prices
Starter
1 seat · 3 channels · 100 posts/mo
Read 12 Oct 2026 · postmill.ai
Pro
3 seats · 10 channels · 2 brand kits · 5 GB storage
Read 12 Oct 2026 · postmill.ai
Team
10 seats · 30 channels · 10 brand kits · Multi-brand workspaces
Read 12 Oct 2026 · postmill.ai
Agency
25 seats · 100 channels · 50 competitor slots · 100 GB
Read 12 Oct 2026 · postmill.ai
Self-Hosted
Full platform · AGPL-3.0 · Docker Compose
Read 12 Oct 2026 · postmill.ai
On the record
- AI providers
- The maker says writing and replies use 30 model providers and AI runs on customers’ own keys without credit packs, AI seat fees, or markup.postmill.ai · read 12 Oct 2026
- Analytics and inbox
- Postmill says it snapshots metrics daily and brings replies from 19 channels into one inbox with AI-drafted responses.postmill.ai · read 12 Oct 2026
- Automation
- The Agency section lists API, SDK, webhooks, Zapier, Make, n8n, and MCP.postmill.ai · read 12 Oct 2026
- Channels
- The maker lists 45 channels across social, chat, blog, and email.postmill.ai · read 12 Oct 2026
- Composer
- One draft can be tailored by channel with previews, format overrides, brand-voice rewrites, and preflight validation.postmill.ai · read 12 Oct 2026
- Design
- The design studio includes a canvas, layers, brand kits, a five-track video timeline, and 36 generation studios.postmill.ai · read 12 Oct 2026
- Integrations
- Listed channel integrations include X, Instagram, LinkedIn, TikTok, YouTube, Discord, Telegram, Slack, Mastodon, Reddit, WordPress, and others.postmill.ai · read 12 Oct 2026
- Intended users
- Plans are presented for an individual, a team, and agencies managing client brands in one workspace.postmill.ai · read 12 Oct 2026
- Open source and hosting
- The core is AGPL-3.0 open source; self-hosting is free on the customer’s hardware, and the maker says data stays within that infrastructure.postmill.ai · read 12 Oct 2026
- Product
- Postmill is an AI-native social media management platform for writing, designing, scheduling, publishing, replying, and reporting.postmill.ai · read 12 Oct 2026
- Scheduling
- Scheduling includes a visual calendar, timezone-aware recurring slots, auto-post queues, CSV bulk import, and automatic retry after network hiccups.postmill.ai · read 12 Oct 2026
- Security
- The homepage states that channel connections use official OAuth and that no passwords are stored.postmill.ai · read 12 Oct 2026
- Security controls
- The homepage lists Google, GitHub, and OIDC SSO, encrypted secrets at rest, per-device session control, and platform-only official OAuth.postmill.ai · read 12 Oct 2026
- Paid from
- 9postmill.ai · read 20 Sep 2026
- Support
- Priority support is included in the Agency plan.postmill.ai · read 12 Oct 2026
