Writing · Head-to-head

Grammarly vs KoalaWriter

Grammarly (freemium, AI Score 7.8/10) vs KoalaWriter (freemium, AI Score 7.4/10). Side-by-side pricing, features, pros and cons, and which to pick.

The verdict

Pick Grammarly if…

→your primary use case is students writing to a rubric, and comms or support teams at companies with a house style guide, who need writing help inside email, docs and internal tools rather than in a separate chat window.
→you need: productivity, education

Try Grammarly →

Pick KoalaWriter if…

→your primary use case is solo niche-site owners and affiliate marketers on wordpress who need cheap, serp-structured long-form drafts at volume and will edit them before publishing.
→you need: marketing

Try KoalaWriter →

Spec	Grammarly	KoalaWriter
Category	Writing	Writing
Pricing model	freemium	freemium
Headline pricing	Free tier + Pro around $12/mo billed annually — check website for current pricing	Free trial + paid from $9/mo
Free tier	Yes — unlimited grammar, spelling and punctuation checks plus basic tone feedback, with generative AI prompts capped monthly	Free trial includes 5,000 words and 25 chat messages with no card required.
AI Score	7.8/10	7.4/10
Best for	Students writing to a rubric, and comms or support teams at companies with a house style guide, who need writing help inside email, docs and internal tools rather than in a separate chat window.	Solo niche-site owners and affiliate marketers on WordPress who need cheap, SERP-structured long-form drafts at volume and will edit them before publishing.
Editor's pick	—	—
Use cases	content-creation productivity education	content-creation marketing
Date added	2025-05-01	2026-06-27

Writing · freemium

✓Operates inside the apps and sites you already write in, so there is no copy-paste round trip to a chat window
✓Ships academic tooling general assistants skip: rubric-based grading, citation finding, plagiarism and AI-text detection
✓Enterprise style guides and brand tones enforce a defined house voice across an entire organization
✓The free tier is genuinely usable for grammar, spelling and basic tone rather than a crippled trial
✓Business tiers carry SOC 2 Type II compliance and commitments against training on customer data

×Generative quality trails frontier chatbots for anything longer than a paragraph or two
×The Superhuman rebrand splintered the lineup across Grammarly, Docs, Mail and Go, making it unclear what a given subscription actually covers
×Hard to justify a separate subscription when an existing ChatGPT or Claude plan already handles rewriting
×The always-on desktop and browser agent reads text across every app, which is a real privacy and resource consideration

Writing · freemium

✓Cheapest credible SEO writer in its class, with a real no-card free trial rather than a demo
✓SERP scraping grounds the outline in pages that already rank, which beats drafting from model memory
✓WordPress publishing plus KoalaLinks internal linking covers the whole keyword-to-published-post loop
✓Hybrid subscription plus per-word billing means a heavy month doesn't force a tier upgrade
✓v2 runs on current frontier models (GPT-5-class, Claude 4-class), so prose quality tracks the field

×No agentic capability — no browsing agent, computer use, or multi-step site audit of the kind rivals now bundle
×SERP-grounded drafting is no longer distinctive; a frontier chatbot with live web search covers the research half
×Scaled AI content is the direct target of Google's site-reputation and helpful-content enforcement, a category-level risk the tool does nothing to mitigate
×Per-word charges stacked on a subscription make a heavy month hard to forecast, and output still needs fact-checking and a voice pass

Updated 2026-08-10. Spec data sourced from official product pages and tracked in our public directory at /tools.