The Best Keyword Research Tools for SaaS That I Use (Free & Paid)

The best keyword research tools for SaaS are Google Search Console and Google Keyword Planner on the free side and Ahrefs, Semrush, and Mangools KWFinder on the paid side.

I’m Nikola Balvikov—a seasoned SEO consultant with over 10 years in the field. I’ve tested all of these keyword research platforms for my SaaS clients, and I certainly know which ones are worth your time.

SaaS brands compete in some of the most crowded search niches on the web. Ranking for the right keywords brings you scalable organic growth that compounds month over month. The tools you use to find these keywords are critical to uncovering high-intent opportunities to rank.

What Are Keyword Research Tools and Why Do You Need Them in SaaS?

Keyword research tools are software platforms that help you discover, analyze, and prioritize the search terms people enter into search engines like Google.

They provide data and insights such as:

• Search volume (how many people search a term)
• Keyword difficulty (how hard it is to rank)
• Search intent (what users are really looking for)
• Related keyword ideas

SaaS brands need to use keyword research tools because they show which keywords your audience searches for, how hard it is to rank for them, and which opportunities are easiest to target. This lets you create content that attracts the right SaaS users.

Without the right tool, you’re guessing at which keywords your ICPs (ideal customer profiles) use and burning content budget on the wrong topics.

What Are the Best Free Keyword Research Tools for SaaS?

The best free keyword research tools are Google Search Console, Google Keyword Planner, Google Trends, Google Autocomplete, AnswerThePublic, and Answer Socrates. Combined, they are a powerful starting point, especially for early-stage SaaS companies or lean content teams managing tight budgets.

These six tools can cover discovery, intent mapping, and performance monitoring without spending a dollar.

Keyword Research Tool	Best For	Free Limit	SaaS Use Case
Google Search Console	Performance monitoring	Fully free	Quick wins on existing pages
Google Keyword Planner	Seed keyword discovery	Fully free	Category keyword universe
Google Trends	Trend validation	Fully free	Topic demand over time
Google Autocomplete	Long-tail discovery	Fully free	Real-time ICP query mining
AnswerThePublic	Visual question mapping	3 free searches/day	Blog + help content ideation
Answer Socrates	Question-based discovery	3 free searches/day (+1 recursive search and 1500 cluster credits/mo)	Top-of-funnel content strategy

Google Search Console (GSC)

Best for: Monitoring existing organic performance and finding quick-win keyword opportunities.

Cost: Free

Google Search Console is the first tool I set up for every SaaS client I work with. It’s free, it pulls data directly from Google, and it shows you exactly how your site is performing in organic search.

For SaaS specifically, I use it constantly to identify product and feature pages already ranking on page two. These are pages Google knows about and partially trusts. They just need a push to reach a higher position on page one. Optimizing them first almost always delivers faster results than creating new content from scratch.

Key metrics you get from GSC:

• Impressions
• CTR (click-through rate)
• average position per keyword, and per page.

What you don’t get: competitor data, keyword difficulty scores, or new keyword discovery.

GSC tells you what’s already working. It won’t tell you what you’re missing.

GSC Pros	GSC Cons
Pulls data straight from Google; no estimates or third-party approximations	Zero competitor data; you can only see your own site’s performance
Shows exactly how each page and keyword performs in organic search	No keyword difficulty scores or new keyword discovery
Impressions data surfaces ranking opportunities you’d otherwise miss	Data is delayed by a few days; not useful for real-time decisions
Page-level and query-level filtering let you get granular fast	Keyword data gets grouped and sampled at high traffic volumes, limiting precision
Free with no usage limits

Google Keyword Planner

Best for: Seed keyword discovery and broad search volume estimates.

Cost: Free (requires a Google Ads account)

Google Keyword Planner is where I start when building a new keyword universe for a SaaS product category. It’s free, it’s built on Google’s own data, and it’s solid for mapping out the broad topical landscape before layering in a paid tool.

The practical SaaS use: type in your product category or core use case and let Keyword Planner surface related keyword clusters you might not have thought of. It’s a starting point, not a finishing line.

One caveat that trips up a lot of people: volume data is shown in ranges, not exact numbers, unless you’re running active Google Ads spend. 1K–10K isn’t nearly as useful as 4,200. Keep that limitation in mind when making content prioritization decisions.

Google Keyword Planner Pros	Google Keyword Planner Cons
Built on Google’s own search data; as close to the source as you can get for free	Volume data shows ranges (e.g., 1K–10K) instead of exact numbers unless running active Google Ads spend
Strong for building out a broad keyword universe around a new product category	No keyword difficulty scores; you can’t assess how competitive a keyword is
Groups keyword ideas into logical clusters, which speeds up topic mapping	Interface is built for advertisers, not SEOs; feels clunky for content research
Pairs well with Google Trends and GSC for a completely free research workflow	No SERP analysis or competitor keyword data

Google Trends

Best for: Validating topic demand over time and spotting emerging SaaS search trends.

Cost: Free

I use Google Trends differently than most SEOs. My main use case for SaaS is comparing branded keyword growth against category keyword trajectories.

Is interest in your product category rising or plateauing? Is a competitor’s brand gaining search momentum? Trends answers those questions fast.

Before I invest content resources in a topic, I check whether it’s growing, stable, or declining. Writing a 3,000-word pillar post on a fading topic is a waste of time and budget. Trends give me the directional signal I need.

Google Trends is useful for seasonal planning and identifying geographic demand variations—helpful if you’re targeting specific markets or planning localized content.

Google Trends Pros	Google Trends Cons
Shows whether topic demand is rising, stable, or declining — no other free tool does this	No absolute search volume data — only relative interest scores (0–100)
Excellent for comparing branded vs. category keyword growth side by side	Works best as a validation tool, not a standalone discovery tool
Geographic breakdowns are useful for market-specific content planning	Thin on detail — you can’t drill into specific keyword metrics
Real-time data, updated constantly	Seasonal patterns can be misleading without year-over-year context

Google Autocomplete

Best for: Fast, real-time long-tail keyword and question discovery directly from Google.

Cost: Free

Google Autocomplete shows you exactly what real people are typing, and for SaaS, that means high-intent, specific queries your ICP actively searches.

My go-to approach: type your product category or a competitor’s name into Google and mine the autocomplete suggestions. Try the alphabet soup method—add a letter after your keyword (e.g., “project management software a, then “b,” then “c”), and you’ll surface dozens of long-tail variations.

The limitation is obvious: no volume data, no difficulty scores.

Use it alongside Google Keyword Planner or a paid tool to validate what you find. But for raw discovery of how your buyers think and talk, it’s fast and free.

Google Autocomplete Pros	Google Autocomplete Cons
Reflects real, live search behavior; actual phrases people are typing right now	No volume, difficulty, or competitive data of any kind
Alphabet soup method generates dozens of long-tail variations quickly	Results vary by location, device, and browsing history; not always consistent
Great for discovering how your ICP phrases their problems before knowing your product	Requires manual effort to scale; no export or bulk functionality
Works for competitor research too—type a competitor’s name and mine the suggestions	Best used as a starting point, not a standalone research method

AnswerThePublic

Best for: Visual question-based keyword discovery grouped by search intent.

Cost: The free plan gives you 3 searches per day with basic features. Paid plans start at $6.67/month (billed yearly).

AnswerThePublic takes a seed keyword and maps out every question, preposition, and comparison variation around it in a visual web.

For SaaS content teams, it’s gold for surfacing “how to [do X],” “what is [feature],” and “best [tool] for [use case]” queries that map directly to blog and help content opportunities.

I’ve used it to build out simple content calendars for SaaS clients. The visual format makes it easy to spot topic clusters and intent patterns.

AnswerThePublic Pros	AnswerThePublic Cons
Visual keyword map makes it easy to spot intent clusters and content gaps at a glance	Free plan limited to 3 searches per day
Surfaces questions, prepositions, and comparisons that other tools miss	No search volume or keyword difficulty data; needs pairing with another tool
Strong for mapping out blog and help content opportunities in one session	Results can include irrelevant or low-value queries that require manual filtering

Answer Socrates

Best for: Question-based keyword research with free unlimited use; a strong free alternative to AnswerThePublic.

Cost: 3 free searches per day (+1 recursive search and 1500 cluster credits per month). Paid plans start at $15/month.

Answer Socrates is one of the most underrated tools in this list. It works similarly to AnswerThePublic, surfacing question-based queries organized by intent, but with a significantly more generous free tier.

The SaaS use case I keep coming back to: exploring problem-aware queries your ICP types before they even know your product exists. These are top-of-funnel keywords that feed blog posts and educational content—the kind that builds awareness and captures future buyers early.

Answer Socrates Pros	Answer Socrates Cons
More generous free tier compared to other question-based keyword tools	Data set is smaller than AnswerThePublic; fewer results for niche or technical SaaS topics
Clean, easy-to-use interface that requires no SEO background	No search volume or keyword difficulty scores on the free plan
Strong for uncovering top-of-funnel, problem-aware queries your ICP searches	Keyword clustering is locked behind the paid plan

What Are the Best Paid Keyword Research Tools for SaaS?

The best paid keyword research tools I use and recommend are Ahrefs, Semrush and Mangools KWFinder. They unlock the competitor intelligence, keyword difficulty data, and bulk analysis that SaaS teams need to build a defensible content strategy at scale. 

Keyword Research Tool	Best For	Starting Price	My Rating for Finding SaaS Keywords
Ahrefs	Competitor intelligence + full SEO suite	$129/mo	5 stars
Semrush	Content marketing + keyword workflow	$139.95/mo	5 stars
Mangools KWFinder	Intuitive research at a budget-friendly price	$61/mo	4 stars
KeySearch	Most affordable entry-level option	$24/mo	3 stars
Keywords Everywhere	In-SERP keyword data on the fly	$7/mo	3 stars
Ubersuggest	Budget all-in-one: keyword research + rank tracking + site audit	$29/mo	3 stars

Ahrefs

Best for: All-in-one keyword research and competitor gap analysis — the gold standard for SaaS SEO teams.

Pricing: Starting at $129/month.

Ahrefs is my primary tool. I use it every day, for every client, without exception. If I had to keep just one paid SEO tool, it would be this one.

For SaaS teams, the two features I rely on most are Keywords Explorer and Site Explorer.

Keywords Explorer handles deep bottom-of-funnel keyword research. I’m talking comparison pages, alternative searches, pricing queries—the keywords that convert.

Site Explorer lets me drop in any competitor’s domain and see their top organic pages, their best-performing keywords, and exactly where they’re getting traffic. That’s where I find the gaps my clients can own.

The Content Gap tool deserves its own mention. You input your domain and up to five competitors, and Ahrefs shows you every keyword they rank for that you don’t. For SaaS keyword research, that’s a direct content roadmap handed to you on a plate.

Ahrefs also offers free Ahrefs Webmaster Tools with limited access. It’s worth setting up if you don’t buy a plan.

Ahrefs Pros	Ahrefs Cons
The most comprehensive competitor intelligence	Expensive; SaaS teams might need a higher-tier plan to get real value
Content Gap tool generates a direct content roadmap from competitor keyword data	Steeper learning curve than simpler tools; takes time to get the most out of it
Keywords Explorer data is deep, reliable, and updated frequently	Content marketing workflow features are less developed than Semrush
SERP history feature lets you see ranking changes over time	No built-in content editor
Free Ahrefs Webmaster Tools available even without a paid plan

Semrush

Best for: End-to-end SEO and content marketing workflow in a single platform.

Pricing: Starting at $139.95/month.

Semrush is Ahrefs’ strongest competitor, and for some SaaS teams, it’s actually the better fit.

The difference comes down to workflow. Ahrefs is superior for backlink analysis and competitor keyword research. Semrush edges ahead for content marketing workflows—topic research, keyword clustering, and position tracking feel more intuitive.

The Keyword Magic Tool is my go-to inside Semrush. It’s excellent for building topic clusters around a SaaS product category. You can group related keywords by intent, filter by difficulty, and map out an entire content strategy in one session. The Organic Research tool is strong for reverse-engineering what’s working for competitors.

One thing worth knowing: Semrush offers a free account with 10 keyword searches per day. Not enough for serious research, but enough to test the platform before committing budget.

Semrush Pros	Semrush Cons
Keyword Magic Tool is the best keyword clustering and topic research feature in any paid tool	Meaningful features for SaaS teams require a higher-tier plan, not the entry-level plan
End-to-end workflow—keyword research, content planning, rank tracking, and site auditing in one platform	Backlink data and competitor link analysis isn’t as strong as Ahrefs
Organic Research makes competitor content strategy analysis fast and actionable	The platform can feel overwhelming at first; too many features competing for attention
Free account with 10 daily keyword searches lets you test before committing	Some data discrepancies with Ahrefs on keyword volumes—worth cross-referencing for high-stakes decisions

Mangools KWFinder

Best for: SaaS teams that want accurate, intuitive keyword research without the complexity or price tag of Ahrefs or Semrush.

Pricing: From $61/month

Mangools is the tool I recommend to early-stage founders and lean content teams who need real data without the learning curve. KWFinder’s interface is clean, the keyword difficulty scores are reliable, and the pricing is genuinely accessible.

For SaaS, I use KWFinder to find low-competition keyword opportunities in a niche, especially for early-stage products that don’t yet have the domain authority to compete for high-difficulty terms.

SERPChecker (included in the Mangools suite) gives you a solid breakdown of what’s ranking and why, which is useful for setting realistic expectations before you commit content resources to a topic.

It’s not a replacement for Ahrefs at scale. But for what it costs, the data quality is impressive.

Mangools KWFinder Pros	Mangools KWFinder Cons
Cleanest, most intuitive interface of any paid keyword research tool I’ve tested	Database is noticeably smaller than Ahrefs and Semrush; niche SaaS keywords sometimes return thin results
Keyword difficulty scores are reliable and well-calibrated	Competitor intelligence isn’t as deep as Ahrefs Site Explorer
SERPChecker gives a solid breakdown of what’s ranking and why	Backlink data quality lags behind market leaders
Best value-for-money in this list	Not the right tool if you need to analyze dozens of competitor domains at scale
Full suite covers keyword research, SERP analysis, rank tracking, and backlinks in one subscription

KeySearch

Best for: Budget-conscious SaaS teams needing core keyword research functionality at the lowest price point.

Pricing: From $24/month.

KeySearch is the most affordable standalone keyword research tool I’ve used that still delivers usable data. You get keyword difficulty scoring, competitor keyword analysis, and SERP analysis—the three fundamentals you need for SaaS content planning.

My honest take: the database is noticeably smaller than Ahrefs or Semrush, and the competitor intelligence features don’t run as deep. For early-stage SaaS companies testing their SEO motion before committing to a bigger investment, KeySearch is a solid entry point. Don’t expect it to replace a full-suite tool as you scale.

✅ Pros	❌ Cons
Most affordable standalone keyword research tool with usable data at $24/month	Significantly smaller database than Ahrefs, Semrush, or even Mangools
Covers the three fundamentals well: keyword difficulty, competitor keywords, and SERP analysis	Competitor intelligence is limited in scope and depth
Straightforward interface that doesn’t require SEO expertise	You’ll outgrow it faster than expected as your content program scales
Good for validating keyword ideas quickly before committing content resources	Fewer integrations and workflow features than all-in-one platforms

Keywords Everywhere

Best for: SaaS teams who want keyword data layered directly into Google SERPs without switching tools.

Pricing: From $7/month.

Keywords Everywhere is a browser extension that overlays search volume, CPC, and competition data onto Google search results as you browse. It’s the lowest-friction keyword data tool. No need to log into a separate platform or copy-paste queries.

For SaaS teams, the best use case is on-the-fly competitive research and ICP query validation.

Use case: you’re browsing a competitor’s site, you see a term, you Google it, and Keywords Everywhere shows you the data instantly.

It also works across 15+ platforms, including YouTube and Amazon. At $7/month, it’s the easiest tool to justify adding to any SEO stack.

Keywords Everywhere Pros	Keywords Everywhere Cons
Lowest-friction way to add keyword data to your workflow	A data overlay tool, not a discovery engine
Overlays volume, CPC, and competition data directly on Google SERPs as you browse	No keyword difficulty scores comparable to Ahrefs or Semrush
Works across 15+ platforms, including YouTube, Amazon, and Bing	Volume data accuracy is inconsistent for low-volume or niche SaaS keywords
	No bulk analysis, content gap features, or competitor domain research

Ubersuggest

Best for: SaaS teams on a tight budget who want an all-in-one keyword research, rank tracking, and site audit tool without paying Ahrefs or Semrush prices.

Pricing: From $29/month.

Ubersuggest punches above its weight for the price. The keyword overview and competitor analysis features are strong enough for SaaS teams at early and mid-stage.

The traffic analyzer lets you benchmark organic performance against direct competitors, which helps you understand where you stand.

A serious limitation is that data breadth and depth don’t match Ahrefs or Semrush. For deep competitor intelligence at scale, it falls short. But as a budget-friendly entry point that covers keyword research, rank tracking, and site auditing in a single dashboard, with a 7-day free trial, it’s hard to argue against $29/month.

Ubersuggest Pros	Ubersuggest Cons
Covers keyword research, rank tracking, and site auditing in one affordable dashboard	Data breadth and accuracy fall noticeably short of Ahrefs and Semrush
Competitor traffic analyzer lets you benchmark organic performance against direct SaaS competitors	Competitor intelligence features are surface-level compared to market leaders
7-day free trial with full access makes it easy to evaluate before buying	You will outgrow it as your SEO program matures and needs deeper analysis
Lifetime deal option available; avoids recurring subscription costs	Less reliable for high-stakes content decisions that require precision data
Straightforward interface suitable for non-specialist users

Can You Use AI Tools for SaaS Keyword Research?

Yes, but with clear limits you need to understand before you rely on them.

I’ve been using ChatGPT and similar AI tools as part of my keyword research workflow, and they’re useful for specific tasks. The key is knowing what to use them for and what to avoid.

Here’s where AI tools add value for SaaS keyword research:

• Brainstorming seed keywords and topic clusters: Give ChatGPT your product category and ICP, and it generates a solid starting list of keyword ideas.
• Identifying bottom-of-funnel query patterns: Ask it to list the types of searches a buyer makes when evaluating software in your category. The output maps closely to real buyer behavior: alternative searches, comparison queries, pricing questions.
• Generating keyword variations and semantic terms: Useful for expanding a seed keyword into related phrases you’d want to include in a piece of content
• Structuring topic clusters: Feed in a list of keywords and ask it to group them by intent. Not perfect, but a fast first pass before you validate in a real tool

This is what AI tools can’t do:

• Give you accurate search volume data: ChatGPT has no access to live search data. Any volume numbers it gives you are fabricated. Never trust them.
• Assess keyword difficulty: It has no visibility into what’s actually ranking or how competitive a SERP is.
• Replace competitor research: It can’t tell you what keywords your competitors rank for or where your content gaps are

The bottom line: I use ChatGPT as a thinking partner in the early research phase for brainstorming, structuring, and expanding ideas. Then, I validate everything in Google Search Console or a paid tool before making any content decisions.

How to Choose the Right Keyword Research Tool for Your SaaS Business

Choose based on what fits your stage of growth and your team’s SEO maturity.

What’s your stage of growth?

• Pre-PMF (Product-Market Fit) and early-stage: Start with all six free tools. GSC, Google Keyword Planner, Autocomplete, Trends, AnswerThePublic, and Answer Socrates together give you a solid discovery and monitoring workflow at zero cost. Spend that budget on content production instead.
• Growth stage (Series A and beyond): Invest in Ahrefs or Semrush. Competitor intelligence and keyword gap analysis at scale become critical when you’re building a content program that needs to outperform established players. These are the best keyword research tools for SaaS companies at this stage.
• Scale stage: Consider a layered stack. Ahrefs for discovery and competitor research, and GSC for ongoing performance monitoring. That’s the setup I run for my highest-growth clients, and it’s also what I use across SaaS SEO tools recommendations for teams at this stage.

What’s your team’s SEO maturity?

• Solo founder or non-SEO marketer: Go with Mangools KWFinder or KeySearch. Both are intuitive enough to use without deep SEO knowledge, and they deliver data that’s good enough to make informed decisions. These are solid answers to which tools help with keyword research for SaaS when you work without a dedicated SEO resource.
• In-house SEO specialist: Ahrefs or Semrush. You’ll get the data depth and workflow that a specialist needs to do serious work.

My Final Thoughts

The best keyword research tools for SaaS that I recommend are Google Search Console (free), Ahrefs (paid), and Semrush (paid). These are the go-to platforms I use for all of my clients.

If you’re on a tight budget, combine all the free tools from my list. Upgrade to Ahrefs or Semrush as your content program matures, and you need to move faster than your competitors. Mangools KWFinder is also good and not that expensive.

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