DEV3 Postwren – Social Media Scheduler SaaS Laravel Script with Content Calendar, Queues, Client Approvals, Analytics

Postwren is a social media scheduler built by DEV3 Technologies on Laravel 12 and Filament 4. You run it as the operator: you sell plans to workspaces (a brand, a creator or an agency with many client brands), and each workspace connects social profiles, writes posts once, schedules them on a calendar or into queue slots, routes them through approvals and reads the results.

What it does

• Composer with a preview per network. One text, a tab for every selected profile with its own preview and character counter, media from a private library, alt text, a first comment, a tracked link with UTM tags and a rule-based caption helper. Limits for ten networks (text length, media count and kind, aspect ratio, size) are checked as you type, on save, on schedule and again at publish time.
• Calendar and queues. Month, week and list views for one brand or all, coloured by content pillar, with holidays and notes. Drag a scheduled post to a new day or hour; the move is re-validated. Give each profile weekly slots, add a post to the next open slot, keep category queues, and shuffle what has not gone out.
• Approvals and a client portal. A rule per brand: none, internal, client, or internal then client. Decisions belong to a round, so an approver with an old version open is told it changed. Clients get a magic link and a phone-first portal with a preview per network: approve or request changes with a comment, no account needed.
• A worker you can trust. Each due post is claimed exactly once, even with several workers; temporary errors retry with backoff; an expired token holds the post instead of failing it; a crash never posts twice. Daylight saving is handled: the intended local time wins.
• Analytics. Impressions, reach and engagement per post and profile, a best-time heatmap by weekday and hour, link clicks, a CSV export and a monthly client report as PDF.
• Comments inbox. Comments on posts published through Postwren, with reply, hide and assign.
• Operator panel and API. Workspaces with usage meters, plans, subscriptions, invoices, driver configuration, failed publishes across workspaces, profile health, an outbox, an audit log and audited view-only support sessions. A scoped REST API with an OpenAPI document, idempotency keys and signed webhooks.

Quality checks

The release passed seven gates on the final code: Larastan level 6 with 0 errors, 272 Pest tests (2523 assertions), a build inside the page budget, migrations and the full demo seed on MySQL 8 and SQLite, a headless smoke test of 63 pages with the happy paths and the MySQL race checks (the same due batch claimed by four workers, two posts added to one queue at once, approving while editing, parallel drags), the installer driven from the zip, and a secret scan. The home page scores 100 for performance and 96 for accessibility on mobile.

What you should know before buying

• Real publishing needs your own developer app on each network, and networks review those apps and may restrict what they allow. The demo and the default install use simulated drivers that never call a network; ten real drivers are present behind configuration and refuse with driver_not_configured until you add keys. Network rules change, so the drivers are isolated to be updated.
• No ads management, no direct messages, no social listening. The inbox covers comments on posts you published.
• Analytics are what each network's API returns (simulated curves in the demo).
• Videos are not transcoded. They must already meet each network's format. Images are resized to the right ratio and cleaned of location data.
• You are the merchant of record. Plans run on a simulated gateway; Stripe, Razorpay and PayPal drivers are present and need your keys.
• The caption helper is rule-based and calls no AI service. An optional remote driver exists, off by default, for your own key.
• A cron entry every minute is required; a queue worker and Reverb are optional. Web only: there are no mobile apps. Node.js is not needed (assets are prebuilt).

How it is different

It is a dedicated scheduler, not a CRM or a messaging tool: per-network previews, queues with time slots, approvals for clients, tracked links, a best-time heatmap and a light comments inbox. It is multi-tenant, with every workspace scoped on every query, so it suits an operator who wants to sell scheduling to many brands and agencies.

Included

Source code, the web installer, a buyer guide, demo data with ten fictional workspaces (a year of history, approvals waiting at an agency, posts that go out within minutes of a fresh install), a cron entry for the scheduler, and six months of support.