# Google Keyword Planner vs the paid keyword tools

Every keyword tool you can buy is modelling the same thing: how many people type a phrase into Google in a month. Google's own Keyword Planner is closest to the source and the least convenient. The paid tools add difficulty, clusters and rivals, and disagree with each other. Here is what each is good for.

Updated 2026-09-15 · Source: https://porteur.ai/compare/keyword-planner-vs-keyword-tools

## Where a search volume actually comes from

A search volume is an estimate of monthly searches for a query in a market, averaged over the last twelve months. It is not a count of last month, and it is not a promise of visits.

- Keyword Planner is Google's own, built for advertisers. It shows ranges to accounts without ad spend and figures to accounts with it, and it groups close variants together.
- The paid tools estimate from Google Ads data, clickstream panels and their own models. That is why two of them disagree about the same phrase, and why both are approximations.
- A cluster's volume is the sum of its members, which is why a page written for one head term is usually worth several times the number next to it.
- A query that shows an AI Overview or a featured snippet sends fewer clicks than its volume suggests.

> Use volumes to rank ideas against each other, never as a forecast. The difference between 300 and 400 a month is noise; the difference between 30 and 3,000 is a decision.

## The five things that separate them

- Precision of the volume: exact figures, ranges, or a model of the two.
- Grouping: whether close variants are folded together or shown separately.
- Difficulty: an estimate of how hard the first page is, which the Planner does not offer for organic search at all.
- Clusters: whether the tool groups queries that one page could answer.
- Rivals: whether you can see who ranks for the query today, and with which page.

## Side by side

| What you want | Keyword Planner | Ahrefs | Semrush |
| --- | --- | --- | --- |
| Volume figures | Ranges without ad spend, from Google | Modelled, exact-looking | Modelled, exact-looking |
| Close variants | Grouped together | Shown separately | Shown separately |
| Organic difficulty | No | Keyword difficulty | Keyword difficulty |
| Who ranks today | No | Yes, with their pages | Yes, with their pages |
| Idea grouping | Basic grouping for ads | Keywords Explorer with parent topics | Keyword Magic Tool with groups |
| Cost | Free with a Google Ads account | Subscription | Subscription |

## What the Planner is genuinely good at

- Being Google's own data, one step from the source rather than two.
- Telling you a phrase has essentially no demand, which a modelled tool sometimes rounds up into something that looks real.
- Commercial signals: the advertiser competition and the bid range say whether a query is worth money to someone.
- Seasonality, in the monthly breakdown, which settles whether a term is fading or simply out of season.
- Costing nothing, which matters when you are deciding whether this discipline is worth a subscription at all.

Its weaknesses are equally clear: ranges rather than figures without spend, grouped variants that hide which phrasing people use, no organic difficulty, and an interface built for buying ads rather than planning pages.

## What the paid tools add that the Planner cannot

- Difficulty estimates, so you can tell a query you might win from one held by five large sites.
- The results page beside the query: who ranks, with which page, and how strong they look in that tool's model.
- Clusters and parent topics, which turn a list of five hundred phrases into twenty pages to write.
- Questions and long phrasings at scale, which is where a small site's first traffic usually comes from.
- History, so you can see a term rising rather than guessing from one snapshot.

None of that changes the underlying truth: every number is an estimate. What you are buying is the work of turning a query list into a page list.

## A free stack that gets most of the way

1. **Start with the queries you already have** Search Console's Performance report lists the searches that have shown your pages, with impressions, clicks and average position. These are real, they are yours, and they are free.
2. **Add volumes from Bing Webmaster Tools** Its keyword research is free and comes with volumes. Bing's share is smaller, so read them as a shape of demand rather than Google's exact figure.
3. **Size the head terms in Keyword Planner** Ranges are enough to separate a term with demand from one without.
4. **Read the results page for intent** Type the query. Guides mean informational, product pages mean transactional, lists and comparisons mean the searcher is choosing. That tells you what to write more reliably than any metric.
5. **Collect the questions** Autocomplete and the People also ask box give you the sub-questions your page should answer, at no cost.

## When to pay for a keyword tool

- When you are choosing between topics every week rather than every quarter.
- When you need to know who holds a query before committing a week to writing for it.
- When the list is long enough that clustering by hand has become the bottleneck.
- When a market you do not know well is on the plan, and you have no Search Console data for it.

Before those apply, the free stack is not a compromise. It is the same decisions with a slightly slower path to them.

## The tools compared

### Google Keyword Planner

Planning advertising campaigns with Google's own view of demand for a query. (ads.google.com)

Good at: Volume ranges straight from Google; Seasonality month by month; Advertiser competition and bid ranges; Confirming a term has no demand; Costing nothing beyond a Google Ads account.

Choose it when You want Google's own numbers, free, and ranges are enough to make the decision.

Not for: Organic difficulty, clusters, or seeing who ranks for the query today.

### Ahrefs

Turning a seed term into a sized list of queries, with the pages that hold them today. (ahrefs.com)

Good at: Keywords Explorer with parent topics; Difficulty estimates; The results page and who ranks on it; Questions and long phrasings at scale; Link context for the pages that rank.

Choose it when You are choosing between topics regularly and need to see the competition before writing.

Not for: Anyone who only needs to check whether a handful of terms are searched at all.

### Semrush

Keyword research inside a broader suite that also tracks, audits and researches rivals. (semrush.com)

Good at: Keyword Magic Tool with grouped ideas; Difficulty and intent labels; Competitive keyword research; Position Tracking for the terms you chose; Advertising data beside the organic view.

Choose it when Keyword research is one of several jobs you want in one subscription.

Not for: A founder who wants one number for one term and nothing else.

**Verdict.** Use Keyword Planner when the question is whether demand exists, and when free matters: it is Google's own data and its ranges are enough to separate a real term from a dead one. Use a paid suite when the question is which of twenty topics to write first, because difficulty, clusters and the current results page are what turn a keyword list into a page list. Whichever you use, read the results page before writing, and treat every volume as a way to rank ideas rather than a forecast of visits.

## Questions

### Is Google Keyword Planner accurate?

It is Google's own data, which makes it closer to the source than any third-party model, but it shows ranges rather than figures to accounts without ad spend and it groups close variants. For deciding whether demand exists it is reliable; for comparing two similar phrasings it is not.

### Why do Ahrefs and Semrush show different volumes for the same keyword?

Both model the number from Google Ads data, clickstream panels and their own methods. Different inputs and different models produce different outputs. Compare keywords inside one tool, not figures across tools.

### Can I use Keyword Planner without running ads?

Yes. You need a Google Ads account, and without spend the volumes appear as ranges rather than exact figures. The seasonality breakdown and the competition signals still work.

### What is the best free keyword research tool?

There is no single one. Search Console for the queries you already appear on, Bing Webmaster Tools for free volumes, Keyword Planner for ranges and seasonality, and the results page itself for intent. Together they cover most of what a small site needs.

### Does a high search volume mean a lot of traffic?

No. Volume is an estimate averaged over twelve months, and a query with an AI Overview or a featured snippet sends fewer clicks than the number suggests. What your page earns depends on position, the title and how many features sit above the results.

## Read next

- [Keyword search volume: where the number comes from and how far to trust it](https://porteur.ai/guides/keyword-search-volume): What search volume really is, how tools make the number, where it misleads, and how to use it to rank pages against each other, not as a forecast.
- [Keyword research without a paid tool: five free sources that are enough](https://porteur.ai/guides/keyword-research-without-tools): Do keyword research for free with Search Console, Google’s own pages, rivals’ sites and Bing volumes. A simple method, a worked example, clear steps.
- [The best keyword research tools, free and paid, by what you need](https://porteur.ai/guides/best-keyword-research-tools): Choose a keyword research tool by what you need: free ways first, beginner picks, full suites, question tools, and a no‑tool method that still works.
- [Keyword research from Search Console alone](https://porteur.ai/guides/search-console-for-keyword-research): Use Search Console alone to find queries you already earn, gaps with impressions and no page, long questions, and pages that compete. Build a plan.
- [Search volume](https://porteur.ai/glossary/search-volume): Search volume is a provider’s monthly estimate of how often a query is searched, and you use it to compare keywords, not to forecast traffic.
- [Keyword volume checker](https://porteur.ai/tools/keyword-volume-checker): Paste up to twenty search terms and get the monthly searches for each in one of six markets, sorted, totalled, and ready to copy as CSV. No account, no card.
- [Keyword ideas finder](https://porteur.ai/tools/keyword-ideas-finder): Type one term and get up to fifty longer searches that contain it, with monthly demand, difficulty and intent, and a reading of the pattern.
- [Semrush vs Similarweb: keywords against traffic estimates](https://porteur.ai/compare/semrush-vs-similarweb): One models search visibility, the other models total visits. Where each number comes from, why they disagree, and which question each answers.

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