Frase IO Review: Is It the Best SEO Tool in 2025? – Undetectable AI

Ever spent hours researching and writing what you thought was going to be the perfect SEO article… only to watch it get buried on page four of Google within just a few weeks?
Yeah, we’ve been there too. 
Tools like Frase IO promise to help you prevent that from happening ever again. But does this AI-powered tool actually live up to the hype in 2025?
Or is it just another “AI SEO helper” that still leaves you cleaning up robotic text? 
In this Frase.io review, we’re putting the platform to the test, evaluating its SEO capabilities, accuracy, and whether or not its AI-generated content can truly compete online (and pass AI detection). 
TL: DR – Frase IO is great for SEO research, keyword analysis, and generating quick first drafts. However, the platform’s AI-written content often gets flagged by AI detectors.
For the best results, use Frase for content planning and pair it with Undetectable AI’s Humanizer or Stealth Writer tools to make sure your content sounds natural.
Key Takeaways

Frase.io is sort of like a cross between Surfer SEO and a mini ChatGPT.
All you have to do is tell Frase what topic or keyword you want to target, and then the platform can automatically:
These automations make life easier for marketers, SEO specialists, and content teams who need to generate SEO-optimized content super fast. 
Frase primarily focuses on on-page SEO.
So when you enter a keyword, Frase immediately scans the top-ranking pages in Google and creates a content outline based on what’s already performing well.
Here’s a quick overview of the type of actionable insights you’ll get from the platform:
This feature alone can save hours of manual SEO research, especially if you’re building a full content strategy with hundreds of articles. 
If you’ve ever used Surfer SEO, the setup with Frase will be very familiar. But what sets Frase apart is that you can generate the outline, brief, and draft all in the same platform. 
However, while Frase’s SEO intelligence is strong, its AI writing engine still depends on GPT-based outputs.
And as we’ve seen in many tools like this, AI-generated text often struggles to sound fully human, especially when tested with advanced AI detectors. 
Frase actually packs a lot of features into a single dashboard.
Here’s a closer look at the platform’s standout features:
Beyond these core features, Frase also includes helpful extras like AI-powered question research, collaboration tools, third-party integrations, and built-in brand voice guidelines.
Like most SEO tools, Frase uses a subscription model.
Here’s the current price breakdown:
If you’re not quite ready for a full subscription, Frase also offers a “Pay as you go” plan. However, this option is just for the AI document writing tool, which starts at $2 per document.
To test this tool, we signed up for a free trial and generated our own piece of content.
The goal of this test was to:
We started by prompting the tool to write a blog post about the best smartphone cameras.
The platform then researched and analyzed the top-performing posts with that keyword phrase. 
Once the analysis was complete, Frase then generated an outline for us. From there, all we had to do was click “Generate Article” to draft a full 2,000+ word article.
For the purposes of this test, we didn’t make any edits to the draft. But in theory, this would be the time where you can read it through, verify any key facts, and tweak the piece so it’s exactly how you want it. 
Once your draft has been generated, you’ll see that it has a content or “topic” score, which is a measurement of how well your content covers your topic.  
Here, you can see our article has a content score of 89%, which is way higher than the average score of 53%.
However, even though the content is well-optimized from an SEO perspective, it still wasn’t quite what we were looking for. 
To start, the suggested title was “The Best Smartphone Cameras of 2024”. Considering it’s 2025 at the time of writing this review, that’s already a red flag.
While the structure was there, the information wasn’t current enough to be relevant for readers. 
Next, we wanted to see if this piece of content could be detected by an AI detector.
To test this, we ran it through three different AI detectors, and here’s what we found: 
So while the article may check every SEO box, it still reads like it was written for an algorithm (and AI detectors can pick up on that). 
Of the three AI detectors we tested, our own AI detector picked up on the most AI patterns.
This wasn’t a surprise, given that Undetectable AI’s detector is ranked among the top five most accurate AI detectors in ZDNet’s independent study. 
And the best part about using Undetectable’s AI detector? There’s a built-in humanizer tool, so we can instantly rewrite any parts flagged as AI.  
Like a lot of all-in-one SEO platforms, Frase IO has plenty of strengths, but it’s obvious that you may not be able to use it for everything it says it can do.
Here’s a balanced breakdown of what works well and where the platform falls short. 
Frase works great for analyzing SERPs, generating topic briefs, and creating drafts quickly.
However, if you want to publish content that won’t trigger AI detection systems or sound robotic to readers, you’ll need an extra step for editing. 
Here’s how both Frase IO and Undetectable AI can work together:
Step 1: Use Frase IO for keyword research, topic briefs, and generating your initial drafts. 
Step 2: Then, run your draft through Undetectable AI’s tools to elevate it and make sure it passes AI detectors. 
In short, Frase can help you get a decent, well-optimized draft together quickly. And then Undetectable AI can help you make sure your content sounds human and is safe to publish. 
Try the AI Detector and Humanizer tools in the widget below!
Yes. Frase.io is a reputable platform used by brands, marketing teams, and content creators worldwide.
From a reliability standpoint, Frase performs well for SEO analysis and basic content creation.
Just keep in mind that, like with other AI content platforms, content created with Frase may not be the most up-to-date, and it may need some editing before it can pass AI detectors as human.
Yes. Frase offers a free trial, but when that trial is up, you’ll have to subscribe to a paid plan.
Pricing starts at $45 per month for a starter plan and can reach over $115+ per month for custom plans.
There is also an option to pay as you go, which starts at $2 per document. 
The “.io” domain is short for “input/output”. This domain is commonly used by tech companies and startups. The “.io” in Frase.io doesn’t do anything; it’s just part of the web address.
Both Frase and Surfer SEO can help you create content that ranks in search engines, but each platform focuses on a different part of the content creation process. 
Frase places a greater emphasis on keyword research and brief creation, so you’ll get in-depth content outlines and topic scores.
Surfer SEO provides more specific on-page optimization guidance, such as keyword density tracking.
If you’re looking for an all-in-one research and writing assistant, Frase is the easier (and cheaper) tool to start with. But if you want deeper on-page insights and recommendations, Surfer SEO might be the better choice.
Reviews on Frase are mixed. On Capterra, Frase has a 4.8 out of 5 stars, and the overall consensus is positive. However, Frase only has 1.4 out of 5 stars on Trustpilot. 
So, is Frase IO the best SEO tool in 2025?
It really depends on what you need it for. 
Frase excels at the SEO research and structuring side of the content creation process.
So if your main goal is to speed up the planning process and generate some decent first drafts that might rank (if they don’t get flagged as AI), then Frase can help get you there. 
However, if you want to create high-quality, human-grade content, you’ll still need to edit your drafts yourself.
And if you want to do that quickly and efficiently, the best tool to pair Frase with is Undetectable AI’s suite of AI detection and humanizing tools.

With Undetectable AI, you can check for AI content and bypass all major AI detectors with a single click. Click below to test the most accurate AI detector and humanizer for free.

Christian Perry is the founder and CEO of Undetectable AI, ranked the best AI detector in the world by Forbes and responsible for the most advanced humanization technology on the market. He drives AI innovation with a focus on creating tools that help people excel in both professional and academic environments. He has shared his expertise in the fields of AI and machine learning technology on prominent outlets such as Business Insider, Forbes, NBC, Fox, and numerous other publications.

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