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CoWriter AI vs Writesonic

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. CoWriter AI starts at $11.99, Writesonic at $79. Only Writesonic has a free tier. Only Writesonic ships a public API.

CoWriter AIStudent writing workspace with drafting, citation generators, plagiarism checks and AI-detection evasion.WritesonicTracks how brands surface inside ChatGPT, Gemini and AI Overviews

Side by side

FactCoWriter AIWritesonic
CategoryEssay & Assignment HelpLong-form & Blog Content
Pricing modelPaidFreemium
Starts at$11.99 month$79 month
Public APINoYes
PlatformsWebWeb, API
CompanyProtonLabs Technology IncWritesonic
Launched—2020
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

CoWriter AI

Bundles the things a student actually opens five tabs for — drafting, citations, plagiarism check — into one $11.99 workspace, and the free citation generators are useful on their own. The terms are where this turns sour: no refunds under any circumstances and an explicit request that you waive chargeback rights. That, plus the AI-detection-evasion pitch, makes it a tool to enter with eyes open.

Pros

  • Citation generators for APA, MLA, Chicago, IEEE, Harvard, Vancouver, CSE and more
  • Plagiarism detection and grammar checking alongside drafting
  • Free standalone tools usable without a subscription
  • Named legal entity, ProtonLabs Technology Inc, in the footer

Cons

  • Terms state all sales are final with no refunds, credits or pro-rata reimbursement
  • Terms ask users to waive the right to dispute or charge back any transaction
  • Markets AI-detection evasion, which conflicts with most academic integrity policies
  • No country, address or API published

Writesonic

This is not the AI copywriter the catalogs still describe — it is a GEO tracking suite priced like one, and at $79 to start you are paying enterprise-monitoring money for a three-engine view of your own brand.

Pros

  • Daily prompt and answer tracking is the core of the product, not a bolt-on dashboard
  • Site audits, content generation and publishing sit in the same tool as the monitoring
  • A genuine free tier still exists, with no card required

Cons

  • Starter watches three engines out of ten; the interesting ones are all Enterprise
  • Month-to-month costs about 25% more than the advertised annual rate
  • The old writing-tool positioning is gone, so most third-party reviews describe a different product
  • Prompt and article caps are daily and monthly, so a burst of work stalls until the counter resets

Which one fits

Choose CoWriter AI if you need

  • Students juggling citation formats across assignments
  • Anyone who wants drafting and plagiarism checking in one place
  • Users who want free standalone citation generators

Choose Writesonic if you need

  • Brands that already know they are losing citations inside ChatGPT and want it measured
  • Agencies reporting AI-answer share of voice to clients month over month
  • Teams that want prompt tracking and article production billed on one invoice

More comparisons

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