Semrush now costs $129.95 a month on the annual plan. Here are the free tools I actually use for keyword research — scored honestly — and a decision rule for which one to reach for.
Two years ago, a small e-commerce brand in Dubai came to me for SEO help. Two founders, one Shopify store, and a budget for tools that was exactly zero. They had read somewhere that you "need" Semrush to do keyword research, so they were staring at a $129.95 monthly invoice wondering whether it was worth it. It was not — not for them, not at that stage.
I have been doing SEO for production products for seven years, and the uncomfortable truth is this: you can complete about 80% of a professional keyword-research workflow with tools that cost nothing. The paid stacks buy you scale, speed, and convenience — not magical data. Google's own keyword data is behind its free Keyword Planner, and Google Search Console gives you exact clicks and rankings for your own site.
In this article, I compare the genuinely free Semrush alternatives you can start using today: Google Keyword Planner, Google Search Console, Ahrefs' free Webmaster Tools, Ubersuggest's free tier, Keyword Surfer, and one newer option I use for fast seed-to-cluster work. I scored each one honestly against the criteria that actually matter, listed them side by side, and finished with a decision rule so you never waste time wondering which tool fits the moment.
What You Are Actually Paying Semrush For
Before comparing free tools, it helps to name what Semrush does well, because "free Semrush alternative" is meaningless unless we know what we are replacing:
- Volume and difficulty estimates at scale — millions of keywords, monthly search volume, keyword difficulty scores.
- Competitor intelligence — what domains rank for, where their traffic comes from, their top pages.
- Position tracking — daily ranking movement for your chosen keywords.
- Site audit and technical crawl — broken pages, missing meta tags, speed issues.
- Backlink analytics — who links to you and to your competitors.
Now the brutal part: of those five, only numbers one and three require continuous paid access to a proprietary index. The other three — audits, backlinks to your own site, and a good chunk of competitor data — are available free from Google Search Console, Ahrefs Webmaster Tools, and Google's own properties. That is the entire argument for a free stack.
The Criteria
Every comparison article has a table; here is mine. I scored each tool on the data you actually get for free, how accurate the numbers are, how hard it is to use, and what scenario it genuinely solves.
| Tool | Free data quality | Volume accuracy | Ease of use | Best for | My score |
|---|---|---|---|---|---|
| Google Keyword Planner | High | High (real Google data) | Medium | Validating demand before building content | 8/10 |
| Google Search Console | High (your own clicks) | Exact (yours) | Medium | Seeing what already works on your site | 9/10 |
| Ahrefs Webmaster Tools | Medium | Medium | High | Top keyword drops + backlinks, free | 7/10 |
| Ubersuggest free tier | Low–Medium | Low–Medium | High | Brainstorming when you are lazy | 5/10 |
| Keyword Surfer | Medium | Medium | High | On-the-fly volume inside Google results | 6/10 |
| MisarSEO (free starter) | Medium | Medium | High | Fast seed → cluster workflow | 7/10 |
| Semrush (paid baseline) | High | High | High | Full agency stack, huge budgets | — |
The important read: no free tool beats Semrush on sheer breadth, and anyone telling you otherwise is selling you something. But the score gap between "8/10 free" and "9.5/10 paid" is a rounding error for a solo founder or a content team on a budget.
Google Keyword Planner — 8/10, the Baseline You Cannot Skip
Keyword Planner is free with a Google Ads account, and you do not need to run a single ad campaign to use it. Create the account, skip the campaign setup, and the planner works.
What it gives you: real search volumes for the region and language you pick, three-month and twelve-month trend lines, and suggested keywords that are surprisingly good at expanding into long-tail variants. The filtering is strong — you can set a volume range, competition level, and even a CPC band.
Where it falls short: the volumes are rounded into ranges (1K–10K, 10K–100K), not exact numbers, and it has no difficulty score. Ahrefs and Semrush publish an estimated keyword difficulty; Google will not. You compensate by looking at the competition column — "High" competition is your difficulty proxy.
I ran the Dubai e-commerce client through Keyword Planner first. We found their whole product niche had a healthy search curve with near-zero high-competition head terms, which told us the market was under-served. That one hour with a free tool de-risked the entire content plan.
Google Search Console — 9/10, the Only Source of Truth
Search Console is not a keyword research tool in the traditional sense — it is the tool that tells you which queries your site already ranks for, with exact impressions, clicks, and average position. Nobody else has this data, not Semrush, not Ahrefs. They all estimate; Google tells you the truth about your own site.
The workflow: connect the property, wait for data to accumulate (four to six weeks minimum, three months for signals), then open the Performance report, filter by position 5–20, and export. Those are your "so close" keywords — real demand you are already in the game for. Ranking for position 12 on a query means the intent matches; you now know exactly which page to strengthen.
Here is a number that made this click for me: the client had 43 queries sitting between positions 5 and 20, generating 900 impressions a month with almost no clicks. Every one of them was free keyword research — real demand, real query phrasing, real searcher language that no tool can guess. We optimized those pages first, before writing a single new article.
Ahrefs Webmaster Tools — 7/10, Free Backlinks and Keyword Drops
Ahrefs gives you a genuinely free tier if you verify your site: Webmaster Tools covers site audits, backlink reports for your own domain, and a "Top keywords" report that shows your ranking keywords with estimated volume. The keyword data in the free tier is limited to your own site's top terms, but the backlink part is the real prize — Ahrefs has the best link index outside of paid plans, and you can see exactly who links to you.
The honest caveat: the free volumes are estimates, and the report only covers keywords you already rank for. It will not brainstorm new markets for you. Use it to find link-building targets and to sanity-check positions you see in Search Console.
Ubersuggest Free Tier — 5/10, Fine for Brainstorming
Ubersuggest gives a handful of free daily searches before it asks for payment. The volumes are widely known to be inflated, the difficulty score is softer than Ahrefs', and the data is a projection rather than a crawl of Google. But if you need 20 keyword ideas in a niche you know nothing about, it is a decent starting point — type a seed, skim the list, then validate the winners in Keyword Planner. I would not build a strategy on its numbers.
Keyword Surfer — 6/10, Volume While You Search
Keyword Surfer is a Chrome extension that injects estimated search volumes, CPCs, and SERP data directly into Google results. It is free, it is fast, and it is perfect for the 30-second check — "is this term worth a page?" The estimates come from its own index and drift on long-tail terms, so treat it as directional, not gospel. It is my default for quick checks, and I cross-check anything important in Keyword Planner.
MisarSEO — 7/10, the Fast Seed-to-Cluster Option
MisarSEO is the tool I have been using for the seed-to-cluster part of the workflow — you drop in a seed keyword and it expands into a mapped cluster with search intent, instead of a flat list. I started using it when I needed to generate twenty content briefs a week and the manual workflow was eating my afternoons, and it is free to start — which is why it earns a spot on this table. You can see the workflow at MisarSEO if that specific job matches yours.
The fair criticism, same as every tool here: the volume estimates are an index projection, not Google's exact numbers, and it does not have Semrush's decade of accumulated competitor data. Use it to compress the brainstorming and clustering hours, then validate demand in Keyword Planner before you commit budget to content.
Semrush — the Paid Baseline
To be fair to Semrush: it is the best single-dashboard SEO suite I have used. The position tracking is excellent, the keyword index is enormous, and the "your competitors' top keywords" view is genuinely powerful for agencies. If you run SEO for five clients at once, the $129.95 a month pays for itself in hours saved.
What I will not do is pretend you need it on day one. For a solo founder or a small team, the free stack covers the two highest-value jobs — proving demand exists and finding the queries you already half-rank for. When the point comes where your keyword list is thousands deep and you are tracking fifty domains, that is the day Semrush earns its invoice. Not before.
The Decision Rule
Here is the rule I now hand every budget-constrained client:
- Prove demand: Keyword Planner, 1 hour. Volume ranges and trend lines for your seed terms.
- Find your near-misses: Search Console, 30 minutes monthly. Queries at positions 5–20 = ready-made content targets.
- Check backlinks: Ahrefs Webmaster Tools, 30 minutes monthly. See who links to you and to competitors.
- Brainstorm fast: Ubersuggest, Keyword Surfer, or MisarSEO when you need a cluster map in minutes — but always validate the winner in Planner before writing.
A paid tool earns its money only when your keyword surface is too big to manage by hand. Until that day, this stack does the job, and it costs a total of zero dollars and one Google Ads account you will never run an ad from.
That Dubai store ran on exactly this for a year. Their organic traffic from a standing start grew steadily month over month, and the only SEO tool they ever paid for was a cheap hosting plan. Sometimes the best alternative to an expensive tool is a better workflow.
*Gulshan Yad
Top comments (0)