Free Keyword Research Tools for Singapore Businesses: What Each One Actually Gives You

Last updated 31 August 2026 — by Adrian Tan, Singapore Digital Marketing

Search for “free keyword research tools” and you get the same article forty times: a numbered list, a screenshot, a paragraph of praise, an affiliate link. What almost none of them tell you is the only thing that matters when you sit down to actually use one — where the free tier stops. Ten searches a day? Ten a month? A thousand rows or a hundred? Does it work on competitors’ sites or only your own?

That gap is worse in Singapore than almost anywhere, because our search volumes are small enough that the free tiers behave differently here than they do in the examples those articles use. A US-focused roundup will happily show you a keyword with 40,000 monthly searches. The Singapore equivalent has 90, and half the free tools round it to zero and show you nothing at all.

So this is not another list. It is an audit of what each free keyword tool publishes as its limit, checked against the vendors’ own pages on 31 August 2026, plus an honest note on the several vendors that publish no limit at all. Then a workable free stack, and the point at which free stops being enough.

If you want the method rather than the tools, that is covered in our guide to keyword research for Singapore businesses, and the editorial side in keyword research for content planning. This post is about the instruments, not the technique.

“Free” means three completely different things

Lump them together and you will plan badly. The three categories behave nothing alike.

1. Free forever, but only for properties you own and verify. Google Search Console, Bing Webmaster Tools, Ahrefs Webmaster Tools. No credit card, no expiry, real data — but you cannot point them at a competitor.
2. Freemium with a published ceiling. A named number of queries or rows, printed by the vendor. Semrush and Ahrefs both do this. You can plan around a published number.
3. Freemium with an unpublished ceiling. The tool advertises a free tier, markets “more searches” as a paid benefit, and never says what the free number is. Ubersuggest and AnswerThePublic both sit here as of today. You cannot plan around this at all.

The third category wastes people’s time, and is worth naming plainly. When a vendor’s pricing page refers to “the free daily limit” without stating it — exactly what AnswerThePublic’s page did when we checked on 31 August 2026 — you find the ceiling by hitting it, usually halfway through a piece of work.

Tier one: genuinely free, unlimited, and restricted to your own site

These three are the backbone of a free stack, and they are better than most paid tools at the one job they do, because they report your actual search data rather than a modelled estimate.

Three things in that table deserve unpacking, because they are the difference between using the data and misreading it.

The 1,000-row wall in Search Console, and the queries you will never see

The Search Console interface truncates to 1,000 rows. Google describes this as “1,000 rows of representative examples” — fine for a small site, badly incomplete for a large one. If you are on a catalogue site or a blog with a few hundred posts, assume you are seeing the top of the distribution and nothing else. The free workaround is the Search Console API or the Looker Studio connector, both of which lift the cap without costing anything.

More important, and much less known: anonymised queries. Google removes queries that were not issued by more than a few dozen users over a two-to-three-month period, to protect the searcher’s privacy. Those queries still count in the chart totals, but they have no row in the table. Google is explicit that if you sum the clicks across all rows you will not match the chart.

In a market the size of Singapore that is not a footnote. A genuinely useful long-tail query — “corporate video production company tanjong pagar”, say — may never be issued by enough distinct people in a quarter to clear the threshold. It brings you a customer. It is invisible in the report. Anyone judging a page purely by the queries listed in Search Console will systematically undervalue the long tail here.

Bing’s data is free, and its Singapore share is 3.37%

Bing Webmaster Tools is a serious free product and its keyword research reports genuine volume. The caveat is scale: Statcounter’s July 2026 figures put Singapore search at Google 92.46%, Bing 3.37%, CocCoc 1.58%, Yahoo 0.88%, DuckDuckGo 0.83%. Treat Bing volume as a directional signal about whether a phrase exists and how it is worded, never as a proxy for the Google number. Multiplying a Bing figure by some ratio to “estimate” Google is guesswork dressed as method.

Ahrefs Webmaster Tools is the most generous free tier in the category

Unlimited verified sites, 5,000 crawl credits per project per month and 1,000 rows of keywords and backlinks visible at once is a lot of tool for nothing. The hard boundary is ownership: free users can analyse only verified sites. Competitor analysis is the paid product, and that is the whole commercial logic of the free tier.

Tier two: the free tiers that print a number

Two vendors deserve credit for publishing exactly what free buys.

Semrush’s free account gives 10 queries per day across Domain Overview, Keyword Research, Competitor Research and Backlinks; 10 keywords in Position Tracking; 100 pages per month in Site Audit; and one On-Page SEO Checker campaign covering up to 10 pages or keywords. That is a precise, plannable allowance. Ten queries a day is 300 a month, which is genuinely enough to research a small site’s content plan if you use them deliberately rather than typing whatever occurs to you.

Ahrefs’ Free Keyword Generator requires no account and returns 100+ keyword ideas per seed, with local and global monthly volume estimates, across Google and eight other engines including YouTube, Bing, Amazon and Baidu. For a Singapore business the YouTube and Amazon modes are more useful than they look — they surface the way people phrase a want when they are not typing into Google, and that phrasing usually transfers.

Google Keyword Planner: free, essential, and quietly imprecise

Keyword Planner is free with any Google Ads account and remains the only tool reporting Google’s own data rather than a model of it. The catch is well known and worth stating precisely, because it is regularly misdescribed.

Keyword Planner reports “average monthly searches” as a figure averaged over a 12-month period for exact matches of the keyword and its close variants, for the location and network you selected. Accounts without meaningful active spend generally see bucketed ranges — 10–100, 100–1K, 1K–10K — rather than a single number. Google does not document a spend threshold at which this changes, and its own support forums carry many reports of accounts with live campaigns still seeing ranges. So treat the range behaviour as observed vendor behaviour rather than a published rule, and do not promise a client that switching on a campaign will unlock exact figures.

Two further cautions that matter more in a small market:

• Close variants are aggregated. “seo agency singapore” and “singapore seo agency” will often report the same figure because Google is bundling them. That is helpful for sizing and misleading if you plan a separate page for each.
• The figures are rounded. Google says so explicitly, which is why volumes across multiple locations do not add up the way you expect. On a keyword with a true Singapore volume of 90, rounding is a material share of the number.

Google Trends: what the 0 to 100 actually is

Trends is free and unlimited and it is not a volume tool, which is where most misuse begins. Google’s own documentation is clear about the mechanics: each data point is divided by the total searches of the geography and time range it represents, and the resulting numbers are scaled 0 to 100 based on the topic’s proportion of all searches. It is a share, not a count. Two regions showing the same interest score do not have the same underlying volume.

Then the line that decides whether Trends is useful to you at all: “Trends only shows data for popular terms, so search terms with low volume appear as ‘0’.” Duplicate searches from the same person over a short window are also stripped out.

For Singapore that means a large share of the commercially interesting long tail reads as a flat zero, and a flat zero in Trends tells you nothing about whether the term is worth a page. Use Trends for three jobs only: seasonality (does interest in this rise in November?), relative comparison between two terms that both have volume, and the regional breakdown. Never use it as evidence that demand does not exist.

The Singapore problem the free tools all share

Every one of these instruments was built for markets where the numbers are large. Four consequences follow, and they are the reason a free stack needs judgement rather than just clicks.

Volumes round to nothing. A Singapore B2B term with genuine commercial value may have 20 to 70 searches a month. Trends shows 0. Keyword Planner shows 10–100. Third-party tools, which model volume from clickstream panels, often show 0 because the panel simply contains no Singapore users searching that phrase. None of that is evidence of no demand. It is evidence that the instrument’s resolution is coarser than the thing you are measuring.

The tools do not know Singlish or local shorthand. “Reno”, “BTO”, “aircon servicing”, “void deck”, “coffee shop” as a category rather than a cafe — these have real search behaviour behind them and thin modelled data in front of them. Google’s autocomplete and the People Also Ask box are better sources for local phrasing than any keyword database, and both are free.

Four official languages, one tool setting. Chinese-language queries from Singapore users are a real segment in some verticals and are handled poorly by tools that assume one language per country. Search Console will show them to you accurately, because it reports what actually happened. This is a case where the free first-party tool beats the paid third-party one outright, and it is the argument our guide to multilingual SEO in Singapore builds on.

Difficulty scores are calibrated on other markets. A “keyword difficulty” of 35 computed largely from global link graphs can be much easier or much harder in a SERP where the top ten are four Singapore SMEs, two directories and a government page. Open the results and look, every time.

A free stack that actually works: sixty minutes a month

Here is the routine we would give a Singapore SME with no tool budget. It is deliberately short, because a research routine you skip is worth nothing.

Step one, twenty minutes, Search Console. Performance report, last three months, Singapore filter, sorted by impressions. You are hunting rows with high impressions and a click-through rate well below the site average. Every one of those is a query where Google already believes you are relevant and users are not choosing you. That is the cheapest content work in existence, and no keyword database will find it for you, because it is your data.

Step two, ten minutes, expansion. Take your five strongest seeds into the Ahrefs Free Keyword Generator, then into Google’s own autocomplete and the People Also Ask box. Autocomplete in particular is the best free source of Singapore phrasing there is, because it reflects what people here actually type.

Step three, ten minutes, sizing. Keyword Planner, location set to Singapore, network set to Google Search only. Accept the ranges. You are separating “hundreds a month” from “tens a month”, not building a forecast.

Step four, ten minutes, seasonality. Trends, Singapore, five-year view. You are answering one question: does this rise at a predictable time of year? If it does, that changes when you publish, not whether.

Step five, ten minutes, the SERP. Open the three strongest terms in an incognito window set to Singapore. Who ranks? If it is four national directories and a government page, the difficulty score is irrelevant — you are not winning that with a blog post. If it is three competitors with thin pages, you are. This step catches more bad decisions than the other four combined, and it is the one people skip.

That routine feeds directly into a publishing plan. How to turn the output into pages that actually earn rankings is the subject of building topical authority with content clusters and, page by page, our on-page SEO checklist.

When free stops being enough

There are three honest triggers, and none of them is “my site is growing”.

• You need competitor data repeatedly. Every free tier either blocks competitor analysis outright (the webmaster tools) or rations it to a handful of lookups a day. If your work involves auditing five competitors a month, ten queries a day stops being a constraint you can plan around.
• You need rank tracking beyond ten keywords. Semrush’s free tier tracks ten. A real Singapore SME content plan has 60 to 200 terms worth watching.
• Someone is billing hours against the research. If an agency or an employee is spending two days a month working around free-tier limits, the tool is cheaper than the labour. That arithmetic, not the feature list, is the actual buying decision.

For reference, here is what the two market leaders publish as of 31 August 2026. Both quote in US dollars, so add exchange-rate movement and your card issuer’s foreign-currency fee to every renewal.

Ahrefs’ Starter plan at US$29 a month is the significant entry in that table for a Singapore SME. It sits far below the old Lite floor and covers exactly the gap the free tier leaves: looking at somebody else’s site. If your only reason for wanting a paid tool is competitor visibility, price that tier before the US$129 one.

Note also that neither vendor publishes a Singapore dollar list price, and that a non-GST-registered Singapore buyer will generally pay 9% GST on these subscriptions where the vendor is registered under IRAS’s overseas vendor regime for remote services. A GST-registered business is treated differently once it supplies its registration number. That is a question for your accountant, not your marketer, but it belongs in the budget line.

Five mistakes we see repeatedly

1. Treating a zero as an answer. A zero in Trends, or a dash in a third-party tool, means the instrument cannot resolve the term. In Singapore that is common and it is not the same as no demand.
2. Building the plan on modelled volume and never opening the SERP. Ten minutes of looking at the actual Singapore results beats any difficulty score.
3. Ignoring Search Console because it “only shows what you already rank for”. That is precisely its value. The high-impression, low-CTR rows are the highest-return content work available to most sites.
4. Assuming a free tier is stable. These ceilings move. Semrush’s own plan names and prices changed this year. Re-check the vendor’s page before you build a process on a number.
5. Paying for a suite to do one job. If the job is competitor keywords, buy the cheapest tier that does them. Most SME subscriptions are 80% unused.

Where this leaves you

The genuinely free stack — Search Console, Keyword Planner, Trends, Ahrefs Webmaster Tools, Ahrefs’ free generator and Semrush’s ten daily queries — is enough to run competent keyword research for a Singapore SME indefinitely. It is not enough to run competitive research at pace, and it never was meant to be.

What free will not give you is the judgement to read a thin Singapore volume correctly, and that is where most of the value sits. A term with 90 searches a month and clear purchase intent is worth more to a Singapore business than one with 3,000 and none, and no tool at any price will tell you which is which. That distinction is the argument in whether SEO is worth it in Singapore, and why we publish our thinking on what SEO actually costs here rather than a price list.

If you would rather someone else ran the routine and turned it into a publishing plan, that is what our SEO services in Singapore exist for, and the outcomes are documented in our client case studies.

Where to go next

• The complete SEO guide for Singapore businesses — the pillar this sits under
• Keyword research for Singapore businesses — the method, not the tools
• Keyword research for content planning — turning a list into an editorial queue
• How to do an SEO audit — much of it possible on the same free tools
• AI SEO tools — a different tool class, for AI search visibility
• Analytics tools compared — the measurement side of the same stack

Frequently asked questions

What is the best completely free keyword tool for a Singapore business?

Google Search Console, and it is not close. It reports the queries that actually produced impressions for your site, in Singapore, including Chinese-language queries, with no volume model in between. Its limits are a 1,000-row export cap in the interface and 16 months of history, and it only works on sites you verify. Every other free tool is a supplement to it.

Why does Google Keyword Planner show ranges instead of exact search volumes?

Accounts without meaningful active spend generally see bucketed ranges such as 10–100 or 1K–10K rather than a single figure. Google does not publish a spend threshold at which exact numbers appear, and its own support forums carry many reports of accounts running live campaigns that still see ranges. Plan on getting ranges, and use them to separate orders of magnitude rather than to forecast traffic.

Why does my Singapore keyword show zero searches in Google Trends?

Because Trends is not a volume tool. It divides each data point by total searches for that place and period and scales the result from 0 to 100, and Google states that terms with low volume appear as zero. In a market of Singapore’s size a great many commercially valuable long-tail terms fall below that threshold. A zero in Trends is not evidence that nobody searches the term.

How many free searches does Semrush give you?

Ten queries per day across Domain Overview, Keyword Research, Competitor Research and Backlinks, plus 10 keywords in Position Tracking, 100 pages a month in Site Audit and one On-Page SEO Checker campaign of up to 10 pages or keywords. Semrush publishes these figures, which makes it one of the few free tiers you can plan around.

Is Ahrefs Webmaster Tools really free, and what is the catch?

It is genuinely free, on an unlimited number of verified websites, with 5,000 Site Audit crawl credits per project per month and 1,000 backlinks and keywords visible at a time. The catch is ownership: you can only analyse sites you have verified. Looking at a competitor requires a paid plan, which starts at US$29 a month on the Starter tier.

Should I trust keyword difficulty scores for Singapore keywords?

Only as a first filter. Difficulty scores are computed largely from link-based signals calibrated on much larger markets, so a Singapore SERP populated by local SMEs, two directories and a government page can be far easier or far harder than the number suggests. Open the results in an incognito window with the location set to Singapore and judge what you see. That check takes two minutes and overrides the score.

Sources: Google Search Console Help and Google Search Central on performance data limits and anonymised queries; Google Ads Help on Keyword Planner forecasts; Google Trends Help FAQ on data normalisation; Semrush pricing and free-account documentation; Ahrefs pricing, Webmaster Tools and Free Keyword Generator pages; Statcounter Global Stats, Singapore search engine market share, July 2026; IRAS guidance on GST for remote services. All vendor limits and prices as published on 31 August 2026 and subject to change. Examples are illustrative.