Linguix vs ProWritingAid

Linguix

A cheaper Grammarly substitute whose two genuinely interesting features are not what it leads with: non-English checking and a grammar API you can embed in your own editor. As a pure English writing assistant it trails the market leaders.

Pros

• +multi-language checking that most English-first rivals do not match
• +documented API with a free 1M-character tier for evaluation
• +text-expansion shortcuts bundled instead of sold as a separate tool
• +two-year plan brings the effective price down to about $10/month

Cons

• −a permanent 50%-off banner makes the real list price hard to pin down
• −team and business pricing is not published anywhere on the site
• −very small company — headcount reported in the low single digits in 2026
• −English suggestion quality does not match Grammarly or LanguageTool Premium

ProWritingAid

For novelists, ProWritingAid is the editor that looks at pacing, repetition, dialogue tags and chapter structure rather than just commas, and the yearly price is a third of the monthly one. The reports take time to learn and the newer AI critique features are rationed by daily caps even on paid plans. If you write emails and reports rather than manuscripts, you are paying for depth you will not use.

Pros

• +Reports on style, readability, repetition, pacing and dialogue, not just grammar
• +Chapter and manuscript critiques, character analysis and a virtual beta reader on paid plans
• +Integrations across Word, Google Docs, Scrivener, browsers, Notion, Pages and a desktop editor
• +Yearly Premium at $10 a month, plus a lifetime option at $399

Cons

• −Monthly billing is three times the yearly rate ($30 versus $10)
• −AI critique and Sparks are capped per day even on Premium (1 chapter critique, 5 Sparks)
• −Free tier checks only 500 words at a time
• −Report density is overwhelming at first and takes time to learn

Is Linguix cheaper than ProWritingAid?

On published entry prices, ProWritingAid starts lower — $10/mo against $30/mo for Linguix. Entry price is the lowest paid plan as we last verified it; what each plan includes differs.

Does Linguix or ProWritingAid have a free tier?

Both: Linguix has a free tier, and ProWritingAid has a free tier.

Which has a public API, Linguix or ProWritingAid?

Linguix ships a public API, as of our last verification. A public API for ProWritingAid is not confirmed by us — check its developer docs before you plan an integration.