Keyword Tool vs QuestionDB in 2026: 15-platform autocomplete vs Reddit-and-Quora question mining
One tool pulls long-tail suggestions from 15 search engines and marketplaces starting at $88 a month. The other mines Reddit, Quora, and People Also Ask for real audience questions from $9.99 a month.
Keyword Tool
QuestionDB- Keyword Tool covers 15 platforms including Google, YouTube, Amazon, Bing, and TikTok. QuestionDB covers 4 sources: Reddit, Quora, Google PAA, and People Also Search.
- QuestionDB's entry paid plan is $9.99 a month. Keyword Tool's entry paid plan is $88 a month, nearly nine times more.
- QuestionDB includes an AI Outline Generator and AI Content Analysis on paid plans. Keyword Tool has no content-generation features at any tier.
- Keyword Tool offers a documented API and an MCP server for AI-assisted workflows from the Growth plan up. QuestionDB has no API on any plan.
- Neither tool offers white-label reporting, so agencies delivering branded client decks need a separate presentation layer either way.
- Keyword Tool's free tier gives unlimited keyword suggestions with no volume data. QuestionDB's free tier is capped at 5 searches a month but includes full question data.
Keyword Tool and QuestionDB both start from the idea that search boxes and forums know what people actually want to read, but they mine that signal in different places. Keyword Tool queries the autocomplete systems of 15 platforms, from Google and YouTube to Amazon and TikTok, and turns those suggestions into a keyword list with volume, CPC, and competition data on paid plans. QuestionDB goes narrower and deeper into audience intent, pulling real questions from Reddit threads, Quora answers, and Google's People Also Ask boxes, then wrapping an AI outline generator around whatever you pick. The price gap is significant too: Keyword Tool's cheapest paid tier is $88 a month, while QuestionDB's Solo plan is $9.99. Which one earns its price depends on whether you need channel breadth or question depth.
The tools at a glance
Keyword Tool
Multi-platform keyword research tool generating long-tail suggestions from autocomplete data across 15 search engines and marketplaces
Keyword Tool builds its keyword lists from live autocomplete data rather than a static database, querying Google, YouTube, Bing, Amazon, eBay, the App Store, Play Store, Instagram, Twitter, Pinterest, TikTok, Etsy, and Perplexity directly. That breadth is the whole pitch: an e-commerce team can research Google and Amazon intent in the same session, and a content team can pull YouTube phrasing without opening a second tool.
Paid plans add search volume, CPC, and competition scores sourced from Google Ads data, plus bulk upload and CSV export for teams processing large keyword sets. The API and MCP server, available from the Starter and Growth tiers respectively, are the more forward-looking additions, letting developers wire keyword suggestions straight into AI assistants or internal tools instead of scraping the interface.
The catch is price. $88 a month for the entry paid tier is steep for a tool that only does keyword suggestion and volume data, with no rank tracking, site audit, or white-label reporting anywhere in the lineup. The free tier is genuinely useful for early-stage ideation, but anyone who needs volume or CPC numbers hits the paywall immediately.
| Feature | Free Free | Starter $88/month ($68/mo annual) | Growth $188/month ($148/mo annual) | Scale $388/month ($308/mo annual) | Agency $788/month ($628/mo annual) |
|---|---|---|---|---|---|
| Search volume data | ✗ | ✓ | ✓ | ✓ | ✓ |
| CPC and competition data | ✗ | ✓ | ✓ | ✓ | ✓ |
| Bulk keyword upload | ✗ | ✓ | ✓ | ✓ | ✓ |
| API access | ✗ | ✓ | ✓ | ✓ | ✓ |
| MCP server access | ✗ | ✗ | ✓ | ✓ | ✓ |
| White-label reports | ✗ | ✗ | ✗ | ✗ | ✗ |
QuestionDB
Find low-competition keywords by mining questions from Reddit, Quora, SERP PAA, and People Also Search
QuestionDB starts from a different question than Keyword Tool: not "what are people typing" but "what are people actually asking." It pulls from Reddit threads, Quora answers, Google's People Also Ask boxes, and People Also Search results, which surfaces the kind of specific, conversational queries that a pure autocomplete tool tends to smooth over.
Paid plans layer search volume, keyword difficulty, and CPC onto the question data, so you're not just collecting questions blind, you're prioritizing which ones are worth a full article. The AI Outline Generator then turns a chosen question into a structured brief, and AI Content Analysis checks existing pages against SERP competitors for coverage gaps. Both features push QuestionDB closer to a content-planning tool than a pure keyword database.
There's no API at any tier, so everything happens inside the browser, and data depth thins out fast on competitive, high-volume topics where Ahrefs or Semrush would give you more. But at $9.99 a month for the Solo plan and 100 searches, it's hard to find a cheaper way to get real Reddit and Quora signal into a content calendar.
| Feature | Free Free | Solo $9.99/mo | Business $29.99/mo | Enterprise $69.99/mo |
|---|---|---|---|---|
| Searches per month | 5 | 100 | 400 | 1,000 |
| Search volume data | ✗ | ✓ | ✓ | ✓ |
| Keyword difficulty | ✗ | ✓ | ✓ | ✓ |
| CPC data | ✗ | ✓ | ✓ | ✓ |
| AI Outline Generator | ✗ | ✓ | ✓ | ✓ |
| API access | ✗ | ✗ | ✗ | ✗ |
Head-to-head feature comparison
| Feature | Keyword Tool | QuestionDB |
|---|---|---|
| Primary data source | Live autocomplete suggestions pulled from each platform | Questions mined from Reddit, Quora, and SERP features |
| Platforms or sources covered | 15 platforms (Google, YouTube, Amazon, Bing, TikTok, Perplexity, and more) | 4 sources (Reddit, Quora, Google PAA, People Also Search) |
| Search volume data | Yes (paid plans, Google Ads sourced) | Yes (paid plans) |
| Keyword difficulty / competition scoring | Competition score (paid plans) | Keyword difficulty score (paid plans) |
| CPC data | Yes (paid plans) | Yes (paid plans) |
| Question and audience-intent mining | No dedicated question mining | Yes, this is the core feature |
| AI content assistance | No | Yes (AI Outline Generator, AI Content Analysis) |
| Bulk keyword upload | Yes (paid plans) | No |
| API access | Yes (Starter plan up) | No, on any plan |
| Free tier | Yes (unlimited suggestions, no volume/CPC) | Yes (5 searches per month) |
| CSV export | Yes (paid plans) | Yes (CSV and image export, paid plans) |
| Cheapest paid plan | $88/mo ($68/mo billed annually) | $9.99/mo (Solo) |
Which should you choose?
Keyword ToolQuestionDBKeyword ToolQuestionDBKeyword ToolQuestionDBThese tools rarely compete for the same search session. Keyword Tool is a breadth play: 15 platforms, an API, and an MCP server, aimed at teams who already know they need multi-channel keyword coverage and are willing to pay $88 a month for it. QuestionDB is a depth play on a single signal, audience questions from Reddit and Quora, wrapped in AI outline tools that shortcut the jump from research to draft, at a price that a solo blogger can justify without a second thought. The overlap is small enough that plenty of serious content teams end up running both.
Bottom line
If your keyword research spans Google, Amazon, YouTube, or any platform outside a single search box, Keyword Tool is the more complete tool and its API and MCP server are worth the $88 a month for teams building AI-assisted workflows. If you're a solo writer or a small content team trying to find real questions your audience is asking on Reddit and Quora, QuestionDB at $9.99 a month delivers more relevant signal per dollar than Keyword Tool's autocomplete suggestions ever will, and the AI Outline Generator gets you to a first draft faster.
Frequently asked questions
Is QuestionDB cheaper than Keyword Tool?
QuestionDB is significantly cheaper than Keyword Tool: its Solo plan is $9.99 a month, while Keyword Tool's cheapest paid tier, Starter, is $88 a month. Both offer free tiers, but Keyword Tool's free plan withholds volume and CPC data entirely, while QuestionDB's free plan includes full question data for up to 5 searches a month.
Does Keyword Tool pull data from Reddit or Quora?
Keyword Tool does not pull data from Reddit or Quora; it sources suggestions from platform autocomplete systems including Google, YouTube, Amazon, Bing, and TikTok, and Reddit and Quora are not among its 15 supported sources. QuestionDB is built specifically around mining questions from those two communities alongside Google's People Also Ask and People Also Search data.
Which tool has an API for developers?
Keyword Tool has both a documented API and an MCP server for AI-assisted workflows, available from its Starter and Growth plans respectively. QuestionDB has no API on any plan, so its data can only be accessed through the browser interface or CSV export.
Can QuestionDB replace a tool like Keyword Tool for Amazon or YouTube research?
QuestionDB cannot replace Keyword Tool for Amazon or YouTube research, since it focuses exclusively on question-based signal from Reddit, Quora, and Google SERP features and does not cover marketplace or video-platform autocomplete data. For Amazon or YouTube keyword research specifically, Keyword Tool's platform coverage is the better fit.
Do either of these tools offer white-label reports for agencies?
Neither tool offers white-label reports: Keyword Tool has no white-label option at any of its five tiers, and QuestionDB does not offer client-branded exports either. Agencies needing branded reports from either tool's data would need to build a separate presentation layer.