SimilarContent Review: SEO Content Optimization Suite Worth It?

What Is SimilarContent and What Does It Cost?

SimilarContent is a suite of six SEO-focused tools designed to help you figure out what content to write and how to optimize it for the best possible Google rankings. It covers everything from keyword difficulty analysis to content spinning — though not all features are created equal.

The AppSumo lifetime deal comes in at $79 per code, which is a step up from the typical $49 offering but still a fraction of what competing tools charge monthly. Each code enables 100 topic difficulty searches, 10 article optimizations per day, and 10 content rewrites per day. You can stack up to five codes to increase those limits.

There are a couple of limitations worth noting. The content rewriter caps articles at 1,000 words per code, so spinning a 3,000-word article requires three codes. The Content Optimizer has a hard ceiling of 10,000 words per article regardless of how many codes you own. And the deal maxes out at just two user seats — you get the second seat at two codes, but it won't scale further no matter how many you stack.

Topic Difficulty: Know Before You Write

The Topic Difficulty tool is arguably the headline feature of SimilarContent. You enter a keyword, and after about 50 seconds of processing, it returns a difficulty score from 1 to 100 along with practical advice on what it'll take to rank. For example, a search for "AppSumo Briefcase" returned a score of 42.7 with a note that the keyword is moderately difficult and will require backlinks.

Beyond the headline score, the results page breaks down the top 10 ranking articles with their relevancy scores. You can see exactly which sites dominate the SERP and why — often it comes down to domain authority rather than content quality alone. The tool also surfaces "to optimize" keywords organized by category: titles, descriptions, synonyms, related keywords, sentiments, concepts, and entities.

The entities section is interesting but inconsistent. It correctly identified that Noah Kagan is related to AppSumo, but it also surfaced irrelevant entities like Netflix, Apple, and Milwaukee. The Google SERP analysis view shows which of the top 10 results are actually using the recommended optimization keywords — a useful at-a-glance check.

Honestly, most of what the Topic Difficulty tool surfaces could be gathered manually with enough patience. But having it compiled into a single summary in minutes instead of spending 30 to 60 minutes digging through search results yourself is where the value lies.

Content Optimizer: Improve What You've Already Written

The Content Optimizer lets you paste in your article text or pull it directly from a published URL, then analyzes how relevant your content is to its target keyword. After hitting the analyze button, you get a relevancy score along with detailed keyword recommendations broken into tabs: Not Found, Low, Good, and Extremely (their label for overused keywords).

For a test article about AppSumo Briefcase, the tool returned a relevancy score of 39.86 against a recommended target of 72. It flagged missing keywords like "business" and "grow," and suggested bumping mentions of "AppSumo" from 26 to 62 times. Whether you'd want to stuff the word "AppSumo" into an article 62 times is debatable, but at least you have a data point to work from.

The optimizer also generates multi-word keyword suggestions, potential questions to answer in your article, and a category recommendation for where Google might want to classify your content. That last feature was a bit off — it suggested filing a software review under "financial news" — so take the categorization with a grain of salt. There's also a keyword ranking predictor that estimates which keywords your article has the best shot at ranking for.

Overall, the Content Optimizer provides a solid framework for improving article relevancy. Whether following its recommendations actually moves the needle on Google rankings is something only time can tell, but the theories it surfaces are directionally sound.

Keyword Brainstorming and Micro Niche Finder

The Keyword Brainstorming tool positions itself as a stripped-down alternative to Google's Keyword Planner, removing cost-per-click data so you can focus purely on organic search opportunities. In practice, the results were a bit thin. Searching for "Briefcase AppSumo" returned only two results, and even a broader "AppSumo" search didn't surface keywords with particularly high search frequency.

The information here overlaps heavily with what's available through Google's own Keyword Planner, which is free to use with a Google Ads account. If you already have that access, the brainstorming tool is more of a convenience than a necessity.

The Micro Niche Finder takes a different approach — you enter a broad keyword and it drills down into sub-niches with lower competition. Starting with "business software" returned nothing, but broadening to just "software" produced categories like "graphic design and illustration software." Clicking into a niche surfaces questions that potential readers are asking, which could serve as article topic inspiration.

The main drawback is the lack of search frequency data alongside those questions, making it hard to gauge whether anyone would actually read an article you write based on these suggestions. There's also no back button once you drill into a niche, forcing you to start the search over — a small but persistent annoyance that crops up throughout the platform.

Content Rewriter and Fresh Keywords: The Weaker Links

The Content Rewriter is SimilarContent's article spinner, and it's the weakest tool in the suite. Content spinning — the practice of shuffling, removing, or replacing words to create "unique" versions of existing text — is a dated SEO tactic that Google has long since caught on to. The output quality reflects this: pasting in text from the AppSumo deal page produced essentially the same content back with a few word swaps and an oddly placed comma at the start.

Google's algorithms are far too sophisticated today to reward spun content. If you're serious about ranking, just write original material. This feature feels like a relic from an earlier era of SEO and could honestly be dropped from the suite without anyone missing it.

Today's Fresh Keywords is a more interesting concept — it surfaces trending search terms in your region so you can write timely content and ride a traffic wave. You search a keyword, get 20 trending results, and can click through to check their topic difficulty. The catch? Most of this data mirrors what's available on Google Trends for free, no account required. It's a convenient shortcut if you're already inside SimilarContent, but not a reason to buy the tool on its own.

UI Rough Edges and Usability Quirks

SimilarContent's biggest weakness isn't its data — it's the user experience. The founder acknowledged the UI shortcomings upfront, and they're hard to miss once you start using the platform. Search history exists but doesn't let you return to previous results with a single click, forcing you to re-run analyses you've already paid for with your daily limits.

The usage meter on the side of the screen uses different feature names than the main dashboard — "keyword ranking" instead of "topic difficulty" — which creates unnecessary confusion. An obnoxious chime plays every time you load the dashboard or a settings page. And there are scattered language barriers in the interface, like the "Extremely" tab label that doesn't clearly communicate it means "overused keywords."

A UI overhaul was reportedly planned for December 15th on the team's public Trello board at the time of review. Whether that update addressed these issues meaningfully would be the deciding factor for many users on the fence. The underlying data and analysis have potential, but the packaging needs serious polish to compete with more established tools.

Final Verdict: A 6.8 Out of 10

SimilarContent earns a score of 6.8 out of 10. It's a nice-to-have tool rather than a need-to-have, and it sits in that awkward space of being a bit of an investment in hopes that the platform matures into something more polished and capable.

It's not a replacement for TextMetrics or Copyrightly if you already own either of those AppSumo lifetime deals. There's some feature overlap, but each tool has enough unique capabilities to justify coexisting in your workflow. SimilarContent's strength is as a convenient place to brainstorm content ideas, check topic difficulty, and then circle back to verify your content's relevancy after publishing.

What it's missing tells you a lot about where the product is in its lifecycle: there's no WordPress integration, no way to save searches into folders, and no real organizational tools for managing your content strategy over time. The conservative play is to grab a single code rather than stacking — you don't want to over-invest in a tool that may or may not deliver on its roadmap promises.

If you write content regularly and do any amount of SEO work, SimilarContent offers enough utility at the lifetime deal price to justify a spot in your toolkit. Just go in with realistic expectations about the current state of the UI and the fact that you're betting on future improvements.

Watch the Full Video

Prefer watching to reading? Check out the full video on YouTube for a complete walkthrough with live demos and commentary.

Frequently Asked Questions

What is SimilarContent?

SimilarContent is an SEO content optimization tool that analyzes competing content for your target keywords and provides recommendations to help your content rank better in search results.

How does SimilarContent help with SEO writing?

SimilarContent analyzes top-ranking pages for your target keyword, identifies important terms and topics to include, and provides a content score as you write to guide optimization.

How does SimilarContent compare to SurferSEO?

SimilarContent offers similar content optimization features at a lower price point. SurferSEO has more integrations and a larger user community, but SimilarContent covers core optimization needs.

Can SimilarContent improve existing content?

Yes, you can analyze existing pages to identify optimization gaps. SimilarContent shows which terms and topics your content is missing compared to top-ranking competitors.

Is the SimilarContent lifetime deal worth it?

For content marketers and bloggers who regularly optimize content for search, the lifetime deal provides ongoing value. The tool pays for itself if it helps even a few posts rank better.