ProWritingAid vs Sassbook AI

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

ProWritingAid

See full pricing history

EUR · US · source: prowritingaid.com

Plan	Pricing	Charged by	Offer type
Free — Basic writing suggestions, everywhere you write	Free Free	Flat	Standalone · Free
Premium — Monthly Highlighted	EUR 30 monthly € 30 00 per month, billed monthly	Flat · per month, billed monthly	Standalone · Fixed
Premium — Yearly	EUR 10 monthly · EUR 10 / month with annual commitment € 10 00 per month, billed yearly	Flat · per month, billed yearly	Standalone · Fixed
Premium Pro — Monthly	EUR 36 monthly € 36 00 per month, billed monthly	Flat · per month, billed monthly	Standalone · Fixed
Premium Pro — Yearly	EUR 12 monthly · EUR 12 / month with annual commitment € 12 00 per month, billed yearly	Flat · per month, billed yearly	Standalone · Fixed

Sassbook AI

See full pricing history

USD · US · source: sassbook.com

Plan	Pricing	Charged by	Offer type
Free — Free	Free $0 /month	Seat · per user/seat	Standalone · Free
Standard — Monthly Highlighted	USD 15 monthly · USD 32.5 / month with annual commitment $15 /month or $32.5 /month, billed yearly	Seat · per user/seat	Standalone · Fixed
Premium — Monthly	USD 25 monthly · USD 49.16 / month with annual commitment $25 /month or $49.16 /month, billed yearly	Seat · per user/seat	Standalone · Fixed

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

ProWritingAid

Free — Basic writing suggestions, everywhere you write

Highlights Word count limit: 500 words

Included
Highlights Runs per report per day: 2

Included
Highlights Rephrases per day: 10

Included
Highlights Sparks per day: 3

Included
Highlights Excludes: Chapter Critique, Manuscript Analysis, Plot Analysis, Virtual Beta Reader, and Marketability Analysis

Excluded
Highlights Grammar, spelling, punctuation: Included
Highlights Word Explorer & Thesaurus: Included
Highlights Document type setting: Included
Highlights Data security and privacy: Included

Premium — Monthly

Highlights Word count: Unlimited

Included
Highlights Report runs: Unlimited

Included
Highlights Rephrases per day: Unlimited

Included
Highlights Sparks per day: 5

Included
Highlights Advanced style improvements: Included
Highlights Custom style guide: Included
Highlights Snippets: Included
Highlights Writing analysis reports: 25+

Included
Highlights Customizable suggestions: Included
Highlights Terminology management: Included
Highlights Author comparison: Included
Highlights Citations: Included
Highlights Collaboration: Included
Highlights Document storage: Included
Highlights Chapter Critique: 1 per day

Included
Highlights Discount on Story Credits: Up to 40% off

Included

Premium — Yearly

Highlights Word count: Unlimited

Included
Highlights Report runs: Unlimited

Included
Highlights Rephrases per day: Unlimited

Included
Highlights Sparks per day: 5

Included
Highlights Advanced style improvements: Included
Highlights Custom style guide: Included
Highlights Snippets: Included
Highlights Writing analysis reports: 25+

Included
Highlights Customizable suggestions: Included
Highlights Terminology management: Included
Highlights Author comparison: Included
Highlights Citations: Included
Highlights Collaboration: Included
Highlights Document storage: Included
Highlights Chapter Critique: 1 per day

Included
Highlights Discount on Story Credits: Up to 40% off

Included

Premium Pro — Monthly

Highlights Everything in Premium: Included
Highlights Sparks per day: 50

Included
Highlights Chapter Critiques per day: 3

Included
Highlights Discount on Story Credits: Up to 65% off

Included
Highlights Live workshops with top authors & editors: Included
Highlights On-demand expert workshop library: Included
Highlights Daily cowriting sprints (beta): Included
Highlights Group critique sessions (beta): Included
Highlights Writer networking events (beta): Included
Highlights Guided writing challenges (beta): Included

Premium Pro — Yearly

Highlights Everything in Premium: Included
Highlights Sparks per day: 50

Included
Highlights Chapter Critiques per day: 3

Included
Highlights Discount on Story Credits: Up to 65% off

Included
Highlights Live workshops with top authors & editors: Included
Highlights On-demand expert workshop library: Included
Highlights Daily cowriting sprints (beta): Included
Highlights Group critique sessions (beta): Included
Highlights Writer networking events (beta): Included
Highlights Guided writing challenges (beta): Included

Sassbook AI

Free — Free

Highlights API Credits: $0 /month

Included
Highlights Words per generation (AI Writer + AI Story Writer): 50

Included
Highlights Candidates per generation (AI Writer + AI Story Writer): 2

Included
Highlights Generations per day (AI Writer + AI Story Writer): 20

Included
Highlights Pages per summarization (AI Summarizer): 2.5

Included
Highlights Summaries per day (AI Summarizer): 15

Included
Highlights Pages per paraphrase generation (AI Paraphraser): 0.3

Included
Highlights Paraphrase generations per day (AI Paraphraser): 10

Included
Highlights Pages per headline generation (AI Headline Generator): 0.5

Included
Highlights Headline generations per day (AI Headline Generator): 10

Included
Highlights Priority processing: Included

Standard — Monthly

Highlights API Credits: $15 /month

Included
Highlights Words per generation (AI Writer + AI Story Writer): 70

Included
Highlights Candidates per generation (AI Writer + AI Story Writer): 4

Included
Highlights Generations per day (AI Writer + AI Story Writer): Unlimited

Included
Highlights Pages per summarization (AI Summarizer): 10

Included
Highlights Summaries per day (AI Summarizer): Unlimited

Included
Highlights Pages per paraphrase generation (AI Paraphraser): 10

Included
Highlights Paraphrase generations per day (AI Paraphraser): Unlimited

Included
Highlights Pages per headline generation (AI Headline Generator): 1.6

Included
Highlights Candidates per generation (AI Headline Generator): 5

Included
Highlights Headline generations per day (AI Headline Generator): Unlimited

Included
Highlights Priority processing: Included

Premium — Monthly

Highlights API Credits: $25 /month

Included
Highlights Words per generation (AI Writer + AI Story Writer): 100

Included
Highlights Candidates per generation (AI Writer + AI Story Writer): 6

Included
Highlights Generations per day (AI Writer + AI Story Writer): Unlimited

Included
Highlights Pages per summarization (AI Summarizer): 20

Included
Highlights Summaries per day (AI Summarizer): Unlimited

Included
Highlights Pages per paraphrase generation (AI Paraphraser): 20

Included
Highlights Paraphrase generations per day (AI Paraphraser): Unlimited

Included
Highlights Pages per headline generation (AI Headline Generator): 1.6

Included
Highlights Candidates per generation (AI Headline Generator): 10

Included
Highlights Headline generations per day (AI Headline Generator): Unlimited

Included
Highlights Priority processing: Included

How their prices changed

Each dated row shows the public prices observed when that vendor’s pricing page changed.

ProWritingAid

August 27, 2026 Source
- Free — Basic writing suggestions, everywhere you write: Free
- Premium — Monthly: EUR 30 monthly
- Premium — Yearly: EUR 10 monthly · EUR 10 / month with annual commitment
- Premium Pro — Monthly: EUR 36 monthly
- Premium Pro — Yearly: EUR 12 monthly · EUR 12 / month with annual commitment

Sassbook AI

August 27, 2026 Source
- Free — Free: Free
- Standard — Monthly: USD 15 monthly · USD 32.5 / month with annual commitment
- Premium — Monthly: USD 25 monthly · USD 49.16 / month with annual commitment