Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. Postiz records 524,221 monthly visits with +14.2% growth and Free Trial, Paid, Contact for Pricing pricing.
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
Ubiquitous Inline Rewriting & Tone Calibration
Works natively inside Chrome, Safari, Firefox, Edge, Windows, Mac, Google Docs, MS Office, and mobile keyboards to flag grammar mistakes, rewrite tangled sentences, and shift tone toward confident, empathetic, or executive registers.
Specialized AI Agents (AI Grader, Citation Finder & Reader Reactions)
Deploys contextual AI agents that predict how a target audience will react to a draft, locate credible supporting citations, grade essays against rubric criteria, and generate drafts using up to 2,000 monthly prompts on Pro.
Grammarly Authorship, AI Detector & Plagiarism Checker
Scans text against billions of web pages and academic databases for accidental plagiarism, detects AI-generated passages, and logs transparent document provenance via Authorship reports in Google Docs and Word.
Team Style Guides, Brand Tones & Knowledge Share
Enables teams on Pro and Enterprise plans to codify company terminology, ban deprecated jargon, enforce inclusive language, insert shared Snippets, and surface internal company definitions inline.
Strengths & Pros
+Frictionless cross-platform integration works inside virtually every browser, desktop app, email client, and mobile OS without copy-pasting into a separate chatbot.
Frequently Asked Questions: Grammarly vs Postiz
Grammarly has 58,867,412 monthly visits, while Postiz has 524,221. Traffic estimates describe audience size, not product quality.
Consolidating Premium and Business into Grammarly Pro ($12/member/month annual) gives individuals and small teams access to style guides, analytics, and plagiarism/AI detection in one plan.
+Grammarly Authorship provides a constructive, transparent audit trail for students and writers to demonstrate human writing integrity alongside responsible AI editing.
+Mature enterprise security posture featuring BYOK encryption, Data Loss Prevention, and granular application/domain blocklists.
Limitations
–Month-to-month billing on Grammarly Pro is steep at $30/member/month compared to the $12/member/month annual commitment ($144 billed upfront).
–Core writing intelligence and style rules remain primarily optimized for English dialects (US, UK, Canadian, Australian, Indian) rather than native multilingual grammar checking.
–Aggressive inline underlines and pop-up agent cards can feel visually intrusive in dense technical documents or code-heavy web editors unless muted per domain.
Postiz
Agentic social media scheduling for 30+ channels
One calendar for 30+ networks
Write a post once and publish to every selected channel, previewing the whole schedule visually before it goes out.
Agentic scheduling via MCP and CLI
Claude, ChatGPT, Claude Code, Cursor, Grok, OpenClaw and others draft, schedule and analyze posts programmatically.
Team collaboration
Invite teammates, assign posts, and keep every channel and approval organized in a shared workspace.
Auto actions
Set a milestone like 100 likes and Postiz automatically posts, likes, or comments to keep engagement going.
Strengths & Pros
+Agents can post directly through MCP and CLI, which most competitors make hard
+Supports a very large number of channels including niche ones like Bluesky, Mastodon and Lemmy
+Open source with a public API and SDK for building on top
+Calendar preview, auto actions and analytics in one workspace
Limitations
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Per-platform formatting quirks still require review before publishing
–Full automation depends on learning the CLI or MCP setup
