Most lists of the best SEO tools test each tool on a different site, on a different day, with a different keyword. That makes the numbers impossible to compare. So we did the boring thing instead: one work account, one small website, one keyword, and the same six tasks in Semrush, SE Ranking, Mangools and Ubersuggest, all on October 21, 2026.
Why We Put Four SEO Suites on the Same Website
Four SEO suites gave us four different search volumes for the same keyword on the same day, from 3.6K to 9.9K, in our October 21, 2026 test log. That one result explains why this comparison exists. If you read four reviews written on four different sites, you can’t tell whether the tool or the site made the difference.
Our test site is a small marketing site our team runs. It’s young, it has few links, and nobody famous points at it. That makes it a fair stand-in for most people searching for the best SEO tools: a blogger, a freelancer or a small business without an agency.
We picked Semrush, SE Ranking, Mangools and Ubersuggest because each one sells an all-in-one SEO suite with keyword research, audits, backlinks and rank tracking, and each one let us start without a card.
Why does a small site matter so much? Because a famous domain makes every tool look good. A low-authority site shows you how far each free plan really goes before it stops.
Key Takeaways
The same keyword returned US search volumes from 3.6K (SE Ranking) to 9.9K (Semrush) in our October 21, 2026 test. SE Ranking’s 14-day trial did the most work, Semrush has the deepest free account, Mangools is the simplest, and Ubersuggest is the tightest at three searches a day. Pick one tool and compare keywords inside it.
Quick Verdict: Which SEO Tool Fits Which Job
SE Ranking did the most on our site, crawling 1,000 pages and finding 77 referring domains during a no-card trial, per our October 21, 2026 test log. But it has no free plan. If you want something you can keep for $0, the answer depends on the job.
| If you want… | Pick | Why, from our test |
|---|---|---|
| The most data before you pay | SE Ranking | 14-day trial, no card: 1,000-page audit, 750 tracked keywords, Google plus five AI answer engines |
| The deepest free account you can keep | Semrush | 100-page audit with a Site Health score, full backlink summary, 10 tracked keywords |
| Simple keyword data and a free rank tracker | Mangools | 5 lookups per 24 hours, 50 tracking slots on one domain, no crawler audit |
| A quick look at one keyword and one site | Ubersuggest | 3 free searches a day, a 150-page audit, 25 tracked keywords |
Is there one best SEO tool for everyone? No, and any list that names one winner without asking what you need is guessing. The table is the short version. The sections below show the numbers behind each row.
How We Tested: Same Site, Same Keyword, Same Six Tasks
We tested all four SEO tools on October 21, 2026, with one work account and no credit card, on the same small website, using the same English keyword in the US database: “generative engine optimization.” Each tool got the same task list, written before we started:
- Sign up and record every screen.
- Research the keyword in the US database.
- Run a site audit on our own site.
- Look up backlinks for the same domain.
- Set up rank tracking for the keyword.
- Write down every free or trial limit the tool shows.
We copied numbers straight from the screen and kept masked screenshots of every step. When this article says “we saw,” the line comes from that log. When it describes something we didn’t open, it cites the vendor’s own pages instead.
Two limits of our test matter before you read on. First, none of the four rank trackers had returned a ranking when we wrote up the results, so this article says nothing about tracking accuracy. Second, we used free plans and one trial, not paid accounts. What does that mean for you? The caps, defaults and friction points are real and current; the paid-plan details come from each vendor’s pricing page.
A note on money: Indie Stack Lab may add affiliate links to some tools later. When a link is an affiliate link, it is labeled. That did not change what we tested or what we wrote down.
Semrush: The Deepest Free Account, With a $299 Trial in the Way
Semrush’s free account ran all six of our tasks and returned the richest single screens of the four tools, including a Site Health score of 89% on a 100-page audit, per our October 21, 2026 test log. The catch comes first, though: sign-up ends on a plan page that reads “Pro+ $299/mo … 7 days free, then $299/mo,” with “Get free trial” as the big button. The free path is the smaller “Skip trial.”
Here’s what the free account gave us on our site:
| Task | What Semrush showed |
|---|---|
| Keyword Overview | 9.9K US volume, Keyword Difficulty 72% (“Hard”), CPC $14.49 |
| Site Audit | 100 of 100 pages crawled, Site Health 89%, 97 errors, 159 warnings |
| Backlink Analytics | 46 referring domains, 2.7K backlinks, Authority Score 7 |
| Position Tracking | 10-keyword cap; engine list offered Google, ChatGPT and Gemini |
What surprised us was the audit’s top issue: broken internal links on 93 of 100 pages. A number like that usually points to one broken link in a shared menu or footer, not 93 separate problems. That’s the kind of fix a free account finds in minutes.
The free account’s public limit is 10 reports per day across all vital tools, with 1 demo project (Semrush). There’s no single page inside the app that lists the free caps. Each one appears the first time you open a tool.
Don’t read too much into the ChatGPT and Gemini choices in the engine list. Semrush’s knowledge base says tracking prompts in AI answers needs its paid AI Visibility Toolkit (Semrush KB: Prompt Tracking), listed at $99/month (Semrush KB: AI Visibility Toolkit). On a free account, we tracked Google only. If AI answers are the main thing you want to watch, our comparison of trackers built for AI answers covers tools made for that job.
Want the full picture of every Semrush tool on a free account? Our tool-by-tool review of a free Semrush account goes through each one, and our deep dive into Semrush keyword research on a free plan explains its seven keyword metrics.
SE Ranking: Biggest Trial Limits, No Free Plan
SE Ranking’s 14-day trial was the largest allowance we saw anywhere: 750 tracked keywords, 5,000 audited pages and 20 AI prompts, with no card entered, per its in-app billing page during our test. Nothing else on this list let us do as much in one sitting.
| Task | What SE Ranking showed |
|---|---|
| Keyword Research | 3.6K US volume, Difficulty 78/100 (“NOT EASY”), CPC $11.78 |
| Website Audit | 1,000 of 1,000 pages crawled, Health Score 94, 6 errors, 29 warnings |
| Backlink Checker | 77 referring domains, 2.2K backlinks, Domain Trust 15/100 |
| Rank tracking | 750-keyword trial cap; Google plus AI Overview, AI Mode, ChatGPT, Gemini and Perplexity widgets |
The audit started on its own when we created the project. We didn’t have to press anything. A score of 94 next to 2,230 issues sounds odd until you see that 2,195 of them were Notices. SE Ranking says its score weighs each issue’s priority and how many pages it affects (SE Ranking blog).
Setup needed two manual fixes. The project location defaulted to the country we were browsing from, not the US, and so did the keyword database. Then the tracking step refused to launch until we added at least one AI prompt. Neither is a dealbreaker. Both can quietly skew your data if you click through too fast.
The price after day 14 is the real question. Our billing page listed Core at $103.20/month billed annually and Growth at $223.20/month billed annually. The public pricing page lists Core at $129/month on monthly billing (SE Ranking pricing). Would you pay that for one small site? If you’d check it every week, maybe. If you’d check it once a month, probably not.
Our screen-by-screen walkthrough of the SE Ranking trial covers the rest, including the backlink menu that opens a monitor instead of the checker.
Mangools: Simple Keyword Data, No Crawler Audit
Mangools gave us 5 keyword lookups, 5 SERP lookups and 5 site lookups per 24 hours on its free plan, and returned clean data in each of the four tools we opened, per our October 21, 2026 test log. It’s the easiest of the four to read. It also has the biggest gap: no crawler-based site audit at all.
| Task | What Mangools showed |
|---|---|
| KWFinder | 4.1k US volume, KD 51, trend -42%, no CPC data |
| Site check (SiteProfiler) | Domain Authority 3/100, Citation Flow 21, Trust Flow 19 |
| LinkMiner | 40 referring domains, 2.4k active backlinks |
| SERPWatcher | 1 tracked domain, 49 keyword slots left after adding one |
Sign-up is the slowest of the four. There’s no Google option, so you need an email, a password, a reCAPTCHA and an email confirmation. When we confirmed the account in a second browser, the first one was logged out.
Here’s the catch with SiteProfiler: it shows authority scores from Moz and Majestic, not a list of broken pages or missing titles. When our task list called for a site audit, it was the closest Mangools had. So pair it with a crawler if you need one.
KWFinder’s related keywords also drifted. For our niche term, most suggestions were broad agency searches like “seo services” and “marketing agency.” Is that a problem? Only if you expect the list to stay on topic. You’ll need to filter it by hand.
Paid plans start at $37.70/month billed annually, or $61/month billed monthly (Mangools pricing). Our full Mangools free plan review covers all four tools and the SiteProfiler glitch that shows zeros until you retype the domain.
Ubersuggest: Three Searches a Day and the Wrong Default Country
Ubersuggest’s free plan allowed 3 searches per day, shared between keyword and backlink lookups, and our keyword check plus our backlink check used two of them, per our October 21, 2026 test log. It’s the tightest free plan of the four. It also gave us the most surprising default.
| Task | What Ubersuggest showed |
|---|---|
| Keyword Overview | 4.4K US volume, SEO Difficulty 10 (“LOW”), CPC $28.56 |
| Site Audit | 150 pages crawled, then an upgrade prompt; On-Page SEO Score 90; 70 issues |
| Backlinks Overview | 48 referring domains, 1,860 backlinks, Domain Authority 3 |
| Rank Tracking | 25-keyword cap, 1 project, 10 AI prompts |
Both the keyword form and the project picked their language and location from where we were browsing, and that wasn’t the US. We switched the keyword form by hand. In the project, we replaced the 12 suggested local-language keywords with our English one but left the market alone. The tracker kept that market. If you take one habit away from this article, make it this one: check the country before you add a keyword.
Project setup also had five steps (segmentation, a business summary, competitors, AI prompts and keywords) plus an “experts help” pop-up before the dashboard. The trend chart and AI summary on the keyword screen were locked behind a 7-day trial.
What about the difficulty score of 10? The other three tools put the same keyword between 51 and 78. Treat Ubersuggest’s “LOW” as Ubersuggest’s scale, not as a promise that the keyword is easy.
Ubersuggest’s pricing page showed a lifetime-deal banner with a countdown and no fixed per-plan price we could quote. Its entry paid tier lists 150 reports per day, 1 project, 1,000 pages per site audit and 125 tracked keywords per project (Ubersuggest pricing). Check the price on the day you buy. Our Ubersuggest review and Ubersuggest pricing breakdown go into more detail.
Same Keyword, Four Numbers: Volume and Difficulty Side by Side
For one keyword, in the US database, on one day, the four tools reported search volumes from 3.6K to 9.9K and difficulty scores from 10 to 78, per our October 21, 2026 test log. No two tools agreed.
| Tool | US search volume | Difficulty | CPC |
|---|---|---|---|
| Semrush | 9.9K | 72% (“Hard”) | $14.49 |
| SE Ranking | 3.6K | 78/100 (“NOT EASY”) | $11.78 |
| Mangools KWFinder | 4.1k | 51 | N/A |
| Ubersuggest | 4.4K | 10 (“LOW”) | $28.56 |
Which number is right? None of them is “the” count. Semrush says it combines third-party data with clickstream data and a machine-learning model, and reports a 12-month average (Semrush KB). Mangools says KWFinder shows the volume for the exact phrase, without grouping close variants (Mangools). Different recipes, different results.
Difficulty is worse, because the four scales measure different things. Mangools’ own advice is the practical one: compare difficulty within one tool, not across tools. In our setup, three tools landed between 3.6K and 4.4K on volume and Semrush stood apart. We’d read that as “a few thousand searches a month,” not as a precise figure.
So what should you do with this? Pick one tool for keyword research and stay with it. A 72% in Semrush and a 78 in SE Ranking are not the same thing, and a 10 in Ubersuggest doesn’t make the keyword easier. To choose that one tool, our keyword research tools comparison runs the same keyword through each of them in more depth.
Site Audit, Backlinks and Rank Tracking Compared
On the three jobs that make up most of an SEO routine, SE Ranking’s trial led on audit size and referring domains, while the free plans split the rest; Mangools couldn’t run an audit at all, per our October 21, 2026 test log. Here are the three jobs, one table each.
Site audits
| Tool | Pages crawled | Score shown | Plan we used |
|---|---|---|---|
| SE Ranking | 1,000 | Health Score 94 | 14-day trial |
| Semrush | 100 | Site Health 89% | Free account |
| Ubersuggest | 150 | On-Page SEO Score 90 | Free plan |
| Mangools | No crawler audit | Not applicable | Free plan |
Is a bigger crawl always better? For a 50-page blog, a 100-page cap covers everything. For a shop with 800 product pages, a 100-page crawl is a sample. Count your pages first. We wrote up what the free crawl found on our site in our write-up of Semrush’s free Site Audit. Our site audit tools comparison lines up what each crawler flagged, and our guide to reading a website check without panicking covers one-off checks.
Backlinks
| Tool | Referring domains | Backlinks | Authority score shown |
|---|---|---|---|
| SE Ranking | 77 | 2.2K | Domain Trust 15 |
| Ubersuggest | 48 | 1,860 | Domain Authority 3 |
| Semrush | 46 | 2.7K | Authority Score 7 |
| Mangools | 40 | 2.4k active | Trust Flow 19 |
Every tool crawls the web with its own bot and keeps its own index, so the counts never match. SE Ranking marked 61 of its 77 domains as new in the last 30 days, which suggests it picks up fresh links quickly. On a small site, though, you’ll look at the same handful of linking sites in any of these tools. More on that in our backlink checkers comparison.
Rank tracking
| Tool | Keyword cap we saw | Location default | Ranking ready when we wrote this? |
|---|---|---|---|
| SE Ranking | 750 (trial) | Browsing country, changed to the US | No, still collecting |
| Mangools | 50 (49 left after one) | We picked the US | Ready “in about 15 minutes,” not read back |
| Ubersuggest | 25 | Browsing country, kept by the tracker | No, update in progress |
| Semrush | 10 | We picked the US | No, gathering data |
None of the four had returned a ranking when we wrote this, so we won’t rank them on accuracy. We set all four up side by side in our rank tracker comparison, including price per tracked keyword.
Free Plans, Trials and List Prices
Three of the four tools have a free plan you can keep, and SE Ranking has only a 14-day trial; the cheapest paid entry point we found was Mangools Basic at $37.70/month billed annually (Mangools pricing). Here is what each free option gave us.
| Tool | Free option | Main limits we saw |
|---|---|---|
| Semrush | Free account, kept after “Skip trial” | 10 reports a day, 100 pages per audit, 10 tracked keywords |
| SE Ranking | 14-day trial, no card | 750 tracked keywords, 5,000 audited pages, 20 AI prompts, 5 websites |
| Mangools | Free plan, no card | 5 keyword, 5 SERP and 5 site lookups per 24 hours; 2,000 backlink rows |
| Ubersuggest | Free plan | 3 searches a day, 150-page audit, 25 tracked keywords, 1 project |
And here are the entry paid plans, from each vendor’s public pricing page on October 23, 2026:
| Tool | Entry paid plan | Monthly billing | Annual billing |
|---|---|---|---|
| Semrush | SEO | $139/month | $117.33/month |
| SE Ranking | Core | $129/month | $103.20/month |
| Mangools | Basic | $61/month | $37.70/month |
| Ubersuggest | Entry tier | Not quoted (lifetime countdown offer) | Not quoted |
Sources: Semrush pricing, SE Ranking pricing, Mangools pricing, Ubersuggest pricing.
Is the cheapest plan the best deal? Not by itself. Mangools Basic lists weekly rank updates, while Semrush and SE Ranking list daily tracking on their entry plans. Semrush’s in-app subscription page also showed only Starter ($199/month), Pro+ ($299/month) and Advanced ($549/month), while the public page adds the $139 SEO plan. Our breakdown of Semrush plans and prices untangles those names, and our roundup of cheaper Semrush alternatives shows what you give up for a lower bill.
Not ready to pay at all? Our guide to free SEO marketing tools compares what each free plan lets you do, and our free keyword research tools comparison lines up the daily lookup limits.
SEO Tools We Have Not Tested: Ahrefs, Moz and Google Search Console
Three names show up on nearly every best SEO tools list but didn’t go through our six tasks, so we won’t score them; Ahrefs, for example, lists paid plans from $29/month (Ahrefs pricing). Everything in this section comes from each vendor’s own pages.
- Ahrefs. Its free tier, Ahrefs Free, covers Site Explorer, Site Audit and Web Analytics for websites you verify, and the Site Audit page lists up to 5,000 pages a month free for verified sites (Ahrefs Site Audit). Researching competitors starts on a paid plan. Our Ahrefs SEO tools guide maps each tool to its cost.
- Moz. Moz Pro is a paid suite, and Moz also publishes the Domain Authority metric that Mangools shows inside SiteProfiler. Our guide to what Moz is and what it includes covers Moz Pro, Moz Local and the free tools.
- Google Search Console. It’s free, and it’s the only tool here with Google’s own clicks, impressions and indexing data for your site. It doesn’t research competitors or keywords you don’t rank for yet. Start with our Google Search Console SEO guide.
Why leave them out of the tables? Because a comparison table should only hold what we saw on screen. Honestly, Search Console belongs next to whichever suite you pick, since none of the four replaces Google’s own data.
Which Tool to Pick: Beginners, Bloggers, Small Teams and Agencies
Start from how many sites you manage and how often you’ll open the tool: in our test, the no-cost tracking caps alone ran from 10 keywords (Semrush) to 750 (SE Ranking’s trial). This section is our judgment, based on the limits above.
- Beginners with one site: start with a free Semrush account. It audited 100 pages, summarized our backlinks and tracked 10 keywords at no cost. Add Google Search Console on day one.
- Bloggers who mostly research keywords: Mangools is the easiest to read. Five lookups a day is enough to check the keywords you already have in mind; pair it with a free audit elsewhere.
- Small teams that check a site every week: run SE Ranking’s 14-day trial on a quiet week, set the location before you launch the project, and decide whether daily tracking is worth $129 a month.
- Agencies and freelancers with several clients: free plans won’t stretch across clients. Compare projects, seats and white-label reports in our guide to SEO tools for agencies.
- Anyone on a zero budget who needs one quick check: Ubersuggest’s 3 daily searches cover one keyword and one backlink lookup. Change the country first.
Do you need more than one tool? Most small sites don’t. What we’d actually do is one suite plus Search Console. If you’re new to all of this, our guide on how to use SEO tools effectively explains the routine: audit first, fix the top issue, then research keywords for the pages you have.
One habit from our test carries over to every tool. Decide what you want to learn before you open it. On a free plan, every report is a budget item.
Further Reading
- Semrush SEO tools review: what a free account gets you
- SE Ranking review: what we found in the 14-day trial
- Mangools review: KWFinder, LinkMiner and SERPWatcher tested
- Best keyword rank tracker software: 4 trackers set up
- Best Semrush alternatives: cheaper SEO tools we tested
References
- Semrush Knowledge Base: Subscriptions and Toolkits
- Semrush Knowledge Base: Prompt Tracking
- Semrush Knowledge Base: What is Search Volume in Semrush?
- Semrush: SEO + AI Search pricing
- SE Ranking: Pricing and plans
- SE Ranking blog: New Website Audit, Health Score and JavaScript Rendering
- Mangools: Plans and Pricing
- Mangools: Top 5 questions about KWFinder answered in detail
- Ubersuggest: Pricing
- Ahrefs: Pricing
- Ahrefs: Site Audit