Shortlist by what you need
Start here if you know why you are leaving Markup AI (formerly Acrolinx).
Want the closest match?
Winston AIMost similar to Markup AI (formerly Acrolinx) in what it does, its category and its price.
Visit (opens Winston AI in a new tab)Need a free plan?
Originality.AIHas a free plan, rated 4.5 out of 5. Markup AI (formerly Acrolinx) has none.
Visit (opens Originality.AI in a new tab)Want the best rated?
TextCortexRated 3.7 out of 5 in our review, against 3.9 for Markup AI (formerly Acrolinx).
Visit (opens TextCortex in a new tab)
At a glance
Green means better than Markup AI (formerly Acrolinx), red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Markup AI (formerly Acrolinx)Baseline | 3.9 | $249/mo | No | Content Guardian Agents that scan, score and fix human- and AI-written content against brand voice, terminology and style rules. | |
| Winston AI | 3.5−0.4 | Free | YesMarkup AI (formerly Acrolinx) has none | AI content and image detection claimed accurate 99.98% of the time - sentence-level highlights, plagiarism checks, and deepfake detection in one report. | vs Markup AI (formerly Acrolinx) |
| TextCortex | 3.7−0.2 | Free | YesMarkup AI (formerly Acrolinx) has none | AI writing platform that grounds every draft in your own uploaded knowledge base, routes prompts across multiple LLMs, and works inside 30,000+ apps through its browser extension. | vs Markup AI (formerly Acrolinx) |
| Originality.AI | 4.5+0.6 | $12.95/mo$236.05 less | YesMarkup AI (formerly Acrolinx) has none | An AI and plagiarism detector built for publishers who need to verify content before it goes live | vs Markup AI (formerly Acrolinx) |
The alternatives in detail
In order of how closely each one matches Markup AI (formerly Acrolinx).
Winston AI
3.5Free
vs Markup AI (formerly Acrolinx)−0.4Free plan
AI content and image detection claimed accurate 99.98% of the time - sentence-level highlights, plagiarism checks, and deepfake detection in one report.
- AI text detection claimed 99.98% accurate across major LLMs
- AI-generated image and deepfake detection
- Plagiarism checking alongside AI detection
Free tier available with no credit card required
Paid tier pricing isn't shown on the homepage
TextCortex
3.7Free
vs Markup AI (formerly Acrolinx)−0.2Free plan
AI writing platform that grounds every draft in your own uploaded knowledge base, routes prompts across multiple LLMs, and works inside 30,000+ apps through its browser extension.
- AI drafting, rewriting, and summarization grounded in a custom knowledge base
- No-code AI agent builder and multi-LLM model hub
- Browser extension working inside 30,000+ apps
Browser extension reach (30,000+ apps) avoids constant context-switching
Free tier's 20 daily creations is limiting for regular use
Originality.AI
4.5$12.95/mo
vs Markup AI (formerly Acrolinx)$236.05 less+0.6Free plan
An AI and plagiarism detector built for publishers who need to verify content before it goes live.
- AI content detection independently benchmarked for accuracy against competing detectors
- Live-web plagiarism checking rather than a static, outdated reference database
- Bundled fact-checking, grammar review, and readability scoring in the same platform
Accuracy claims are independently benchmarked rather than only self-reported
No unlimited free tier; the free AI checker is capped at a small word count
FAQ
Questions people ask
Is Markup AI (formerly Acrolinx) free?
Markup AI (formerly Acrolinx) does not list a free plan. Paid plans start from $249/mo.
What is the best free alternative to Markup AI (formerly Acrolinx)?
Originality.AI is the highest-rated alternative here with a free plan (4.5 out of 5). Other free options: TextCortex, Winston AI.
What is the cheapest alternative to Markup AI (formerly Acrolinx)?
Among paid plans, Originality.AI has the lowest starting price (from $12.95/mo). If you need it free, start with Originality.AI.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.