Amazon keyword research tools surface search terms, estimate search frequency, and show which listings rank for them. Sellers use this data to write optimized listings, build PPC campaigns, and close keyword gaps.
This guide ranks 11 tools by practical utility. Pricing is sourced from each tool's official website or verified third-party sources as of mid-2026. AmpliSell's full-service Amazon management team works with these tools daily, and first-party observations are noted throughout.
Search volume: An estimate of how many times a keyword is searched on Amazon per month. Because Amazon doesn't publish this data, tools derive it from behavioral signals, making figures directional rather than exact.
Reverse ASIN lookup: A feature that takes a competitor's product ID (ASIN) and returns the keywords that product currently ranks for. It's one of the fastest ways to build a launch keyword list.
Indexing: Amazon indexing means the algorithm has recognized a keyword as relevant to a listing. A listing must include the keyword in its content or backend search terms to become indexed and appear in search results.
Search query: The exact phrase a shopper types into the Amazon search bar. One product can be relevant to hundreds of distinct search queries at once.
Match types (broad, phrase, exact): PPC bid settings that control how closely a shopper's query must match an advertised keyword. Broad match captures variations; phrase match requires the words in order; exact match requires an identical query.
Organic rank: The unpaid position a listing holds in Amazon's search results for a given keyword. Moving from page three to page one for a high-volume term can meaningfully increase units sold without adding ad spend.
Keyword gap: Keywords that competitors rank for organically that a brand's listing does not yet target. Closing keyword gaps is one of the primary objectives of listing optimization.
Keyword data from any single tool is an estimate, not a guarantee. Across our book of business, we cross-reference at least two tools before finalizing a master keyword list for a new launch. The overlap between high-confidence terms from separate data sources signals the most reliable targets.
Helium 10 is the most complete all-in-one Amazon seller platform, covering keyword research, listing optimization, rank tracking, and PPC in one plan. Its January 2026 Cerebro/Magnet merger simplified keyword research for hundreds of thousands of users.
Helium 10 remains the dominant choice for Amazon keyword research because of the breadth of data it combines. The merged Cerebro/Magnet tool accepts an ASIN or seed keyword. It returns search volume, IQ score, title density, and two years of trend history.
Sellers compare up to 10 competitor ASINs and filter by organic rank, sponsored rank, and word count.
In our testing, the Cerebro IQ score is a reliable signal for de-prioritizing ultra-competitive terms during early-stage research. We regularly use Helium 10 as the primary research layer for new client launches. The top 50 keywords then get validated against Amazon Brand Analytics before we build listing copy.
Pros: Most complete keyword dataset available; frequent feature updates; large user community with tutorials; covers listing, PPC, and operations in one platform.
Cons: A 2026 price increase makes it pricier; Platinum has data limits; it's complex for new sellers.
Pricing: Free plan available. Platinum is $99/month (annual) or $129/month (monthly). Diamond is $252/month (annual) or $359/month (monthly).
Enterprise is $1,499/month.
Jungle Scout's Keyword Scout offers reverse ASIN lookup, two years of historical search data, and multi-ASIN comparison. It's a strong alternative to Helium 10 for sellers who prioritize clean data and a lower entry price.
Keyword Scout inside Jungle Scout covers keyword search, single reverse ASIN, and multi-ASIN comparison of up to 10 products. It displays monthly and quarterly trend data with organic and sponsored positions per ASIN. Filters include search volume, relevancy score, and word count.
The platform also includes a Rank Tracker and a PPC keyword recommendation feature.
We've found Jungle Scout's keyword data particularly clean for teams that want fast decisions without heavy filtering. For brands entering new categories, the two-year trend history helps spot seasonal demand patterns before committing to inventory.
Pros: Clean, well-structured data presentation; two-year trend history; lower starting price than Helium 10; reliable search volume estimates.
Cons: Fewer total tools than Helium 10; no free plan (money-back only); keyword database slightly smaller than Helium 10's merged Cerebro/Magnet.
DataDive aggregates keyword data from multiple sources, including Amazon Brand Analytics, into a cleaned Master Keyword List ranked by sales relevance. It's the go-to tool for teams running deep competitor keyword gap analysis before a product launch.
DataDive's core workflow centers on "Niche Dives." Sellers enter competitor ASINs, and the platform pulls keyword data from Brand Analytics, Keepa, and Jungle Scout's API. Results merge into a cleaned Master Keyword List ranked by sales-performance correlation rather than raw search volume.
DataDive is most valuable during the pre-launch strategy phase. Maelove grew from $0 to $3.6M in 11 months on Amazon. Keyword gap analysis was a foundational step in that launch.
DataDive's multi-source model reduces the risk of missing high-converting terms that single-source tools overlook.
Pros: Multi-source data aggregation in one view; sales-relevance ranking over raw volume; best-in-class for pre-launch niche keyword strategy; Brand Analytics integration.
Cons: Not an all-in-one tool; no inventory, PPC management, or order analytics. Requires Jungle Scout or Keepa access for full functionality. Smaller community than Helium 10.
Pricing: Starter is $39/month; Standard is $149/month; Enterprise is $490/month. Annual billing saves 16%.
SmartScout is a market intelligence platform that maps search terms to brands, sellers, and subcategories rather than just individual ASINs. It's especially powerful for wholesale sourcing teams and brands analyzing category-level keyword ownership.
SmartScout covers over 40,000 Amazon subcategories and tracks more than two million search terms. Its Keyword Detective Venn diagram shows shared keywords between products, and the Relevancy Quadrant maps keywords by search volume against relevancy. SmartScout also includes an AI Listing Architect that builds copy from competitor keyword data.
In our experience, SmartScout's strength is category-level market intelligence rather than granular listing-level keyword refinement. We recommend it to brands that want to map keyword ownership across a full subcategory before committing to a launch.
Pros: Outstanding category and brand-level intelligence; strong for wholesale and arbitrage sourcing. Venn diagram keyword overlap is visually intuitive. Covers multiple seller types.
Cons: Less granular than Helium 10 or DataDive for listing-level refinement. Keyword tools require Essentials plan or above. Interface takes time to learn.
ZonGuru combines keyword research, listing optimization, and seller analytics in a mid-priced package. Its Keywords on Fire and Keywords Spotlight tools give private label sellers a focused, easy-to-navigate research workflow.
ZonGuru's Keywords on Fire generates keyword lists from real Amazon buyer search data. Keywords Spotlight accepts competitor ASINs and highlights keyword gaps versus top performers. The Listing Optimizer compares up to eight ASINs side by side.
ZonGuru also includes email automation and review management.
We find ZonGuru well-suited for solo sellers and small teams with a focused private label catalog of under 20 SKUs. Keywords Spotlight is particularly clean for identifying which competitor terms a listing is missing before a copy refresh.
Pros: Clean, focused interface; good value for private label sellers; standalone Keywords on Fire add-on option; strong listing optimization workflow.
Cons: Smaller keyword database than Helium 10 or Jungle Scout; fewer advanced filter options; less suited for large multi-brand catalogs.
Pricing: Researcher plan at $49/month. Seller plan at $79/month. Annual billing saves up to 40%.
Sonar is a completely free Amazon keyword research tool providing search volume estimates from real Amazon shopper query data. It's the best zero-cost starting point for new sellers and a reliable sanity-check for experienced teams.
Sonar, now maintained by Perpetua, operates from a continuously updated database of Amazon product and keyword combinations. Sellers enter a keyword or ASIN and get related search terms with frequency estimates from real shopper behavior. It supports multiple marketplaces, requires no signup, and carries no usage fees.
We use Sonar as a quick sanity check when validating keyword priorities. Its data is narrower than Helium 10 or Jungle Scout, but it's fast for confirming whether a term has real search activity.
Pros: Free with no signup; data grounded in actual Amazon shopper behavior; fast and simple interface; good starting point or cross-check tool.
Cons: No rank tracking, listing builder, or PPC features; estimates are less detailed than paid tools; no export or filtering.
Pricing: Free.
MerchantWords is one of the longest-running Amazon keyword databases, covering more than six billion keywords across 11 marketplaces. Its Silver plan offers an affordable entry point for sellers focused on international keyword research.
MerchantWords is built around a large-scale shopper search database. Core tools include ASIN Plus for competitor keyword lookup and Digital Shelf for category-level analysis. Market Insights handles trend data, and an API serves enterprise teams.
Higher-tier plans unlock multi-region access and additional users beyond the Silver plan's single-marketplace limit.
In our experience, MerchantWords is most useful for international expansion research. Its 11-marketplace coverage and marketplace-specific volume estimates outperform most competitors in that use case. For US-only research, teams will generally find Helium 10 or Jungle Scout more feature-complete at comparable price points.
Pros: Best marketplace breadth with 11 Amazon markets; large keyword database; API available; affordable Silver entry point for single-market research.
Cons: Silver plan caps at 500 searches/month on one marketplace. Interface is less modern. Rank tracking and listing optimization are weaker than competitors.
AMZScout is a budget-friendly all-in-one platform for beginner and intermediate sellers. It covers keyword research, product research, and sales estimation for less than Helium 10 or Jungle Scout on annual billing.
AMZScout includes reverse ASIN lookup and a keyword search tool returning estimated monthly volumes with competition scores. The platform integrates with a Chrome extension for on-page research. A product database, FBA fee calculator, and listing quality checker are all included.
The lifetime plan option lets sellers cap long-term software costs.
We've found AMZScout useful for early-stage sellers who need a capable toolkit at low cost. Its keyword database is smaller than Helium 10's, but it covers the core workflow at a fraction of the price.
Pros: Low entry price; lifetime plan available; good for beginners; Chrome extension is capable; covers product and keyword research in one plan.
Cons: Smaller keyword database than Helium 10 or Jungle Scout; fewer advanced filters; less suited for large-scale or agency use.
Pricing: AI Bundle at $59.99/month, $399.99/year (with 3 bonus months), or $1,599.99 lifetime.
Keepa is primarily an Amazon price history and sales rank tracker. Its product and category-level data make it a valuable supporting tool for keyword researchers who need demand validation.
Keepa tracks price and sales rank history for hundreds of millions of Amazon products, updating every 15 minutes. Its sales rank charts, estimated units sold, and stock level tracking give sellers strong demand context. The browser extension integrates directly into Amazon product pages.
DataDive also pulls Keepa's historical data directly into its Niche Dive workflow.
We use Keepa primarily for demand validation, not keyword discovery. Consistent sales rank history on a term's top ASINs signals sustainable demand rather than a trend spike.
Pros: Extremely affordable; real-time updates; integrates into Amazon pages; used as a data source by other tools; reliable demand validation layer.
Cons: Not a keyword research tool; no keyword search, reverse ASIN, or listing optimization; best paired with a dedicated keyword platform.
Sellerboard is an Amazon profit analytics platform, not a keyword research tool. Its PPC profitability data shows which keyword-driven campaigns generate real margin, making it a key complement to any research stack.
Sellerboard provides a live P&L dashboard tracking revenue, Amazon fees, PPC costs, returns, refunds, and COGS per product. Its PPC analytics layer shows which campaigns generate profit versus burn budget at the product level, which Amazon's advertising console doesn't provide. Sellerboard also includes automated reimbursement tracking for lost FBA inventory.
Across our book of business, Sellerboard data frequently shapes keyword strategy. High clicks with negative PPC profitability signals a match type or conversion issue, not a reason to add budget.
Pros: Best-in-class profit analytics at its price point. PPC profitability data closes the loop on keyword ROI. Very affordable entry tier; covers reimbursements and inventory in one plan.
Cons: No keyword research, reverse ASIN, or listing optimization tools; requires a separate keyword research platform to be useful for research purposes.
ZonGuru's Keywords on Fire is a $19/month standalone add-on for sellers who want focused keyword discovery without a full ZonGuru subscription. It rounds out this list as the most affordable dedicated keyword research option.
As a standalone product, Keywords on Fire gives sellers keyword lists for any Amazon category without requiring the full ZonGuru plan. It surfaces keywords that correlate with purchases rather than browsing activity, making it a low-cost research entry for private label sellers. It integrates with the full ZonGuru suite on upgrade.
We recommend Keywords on Fire for sellers still validating product ideas who don't yet need rank tracking, PPC management, or listing optimization. It's a practical way to start building keyword lists with real buyer data at minimal cost.
Pros: Most affordable standalone keyword research option on this list; purchase-behavior data focus; upgrades cleanly into ZonGuru full plan.
Cons: No reverse ASIN, rank tracking, or listing builder; narrower data set than full platforms; limited filtering and export options.
Pricing: $19/month as a standalone add-on.
Most agencies stack Helium 10 or Jungle Scout for daily work plus DataDive for pre-launch niche analysis. Adding Keepa and Sellerboard for under $40/month combined closes the keyword ROI loop.
Tool
Best for
Standout feature
Starting price
Free trial / plan
Helium 10
All-in-one research and operations
Merged Cerebro/Magnet with 10-ASIN comparison
$99/month (annual)
Free plan (limited searches)
Jungle Scout
Clean keyword data with trend history
2-year search volume history in Keyword Scout
$29/month (annual)
7-day money-back guarantee
DataDive
Pre-launch niche keyword gap analysis
Multi-source Master Keyword List aggregation
$39/month
No free plan listed
SmartScout
Category and brand-level keyword intelligence
Keyword Detective Venn diagram overlap
$29/month (Basic)
7-day money-back guarantee
ZonGuru
Private label sellers with focused catalogs
Keywords Spotlight reverse ASIN + Listing Optimizer
$49/month
7-day free trial
Sonar by Perpetua
Budget-conscious sellers and quick validation
Free reverse ASIN and keyword data
Free
Always free
MerchantWords
International marketplace keyword research
6B+ keywords across 11 Amazon marketplaces
$35/month
Free trial available
AMZScout
Beginners needing an affordable all-in-one
Lifetime plan option for permanent access
$59.99/month
10-day money-back guarantee
Keepa
Demand validation and price history
15-minute data refresh with stock level tracking
~$21/month (€19)
Free tier available
Sellerboard
Keyword ROI and PPC profitability tracking
Product-level PPC profit/loss analytics
$15/month (annual)
2-month free trial
Keywords on Fire
New sellers building first keyword lists
Standalone buyer-behavior keyword discovery at $19/month
$19/month (standalone)
Via ZonGuru 7-day trial
In January 2026, Helium 10 merged its Cerebro reverse ASIN tool and Magnet keyword discovery tool into one unified interface. Sellers can now enter an ASIN or a keyword from the same screen, cutting research session time significantly.
The right tool depends on the stage of the business and the type of research needed. Brands just starting out can cover most needs with Sonar (free) and one affordable all-in-one like Jungle Scout or AMZScout.
Growing brands with five or more SKUs typically add DataDive for pre-launch niche work and Keepa for demand validation. Sellerboard then closes the loop by showing which keywords generate real profit.
Agencies typically need the highest usage tiers of Helium 10 or Jungle Scout plus DataDive for launch strategy. AmpliSell's team uses Helium 10 for ongoing research and DataDive for launch keywords. Sellerboard tracks PPC profitability across full-service Amazon management engagements.
For brands entering international markets, MerchantWords' 11-marketplace coverage makes it worth evaluating as a complement to a US-primary tool. Sonar also supports multiple marketplaces and costs nothing, which makes it a useful first step before committing to a paid international plan.
Teams weighing in-house research versus an agency can consult The Definitive Guide to Hiring an Amazon Agency in 2026. It covers cost, capability trade-offs, and when to make the switch.
Helium 10 is the most widely used all-in-one option. Its merged Cerebro and Magnet interface covers reverse ASIN lookup, keyword discovery, rank tracking, and listing optimization in a single platform. Brands needing deeper niche analysis often pair it with DataDive for pre-launch competitor keyword gap work.
Reverse ASIN lookup takes a competitor's product ID and returns the full list of keywords that product ranks for on Amazon. It matters because it reveals proven, sales-generating terms rather than speculative ones, which shortens the research process and reduces listing launch risk.
Yes. Sonar by Perpetua is completely free and provides keyword search volume estimates from real Amazon shopper data. Helium 10 and Jungle Scout both offer limited free plans.
Keepa has a free tier for basic price tracking, with keyword-level features on its paid plan.
Amazon does not publish official search volume numbers publicly. Third-party tools estimate monthly volume by analyzing purchase behavior, click-through patterns, and Amazon Brand Analytics data where available. Figures vary between tools because each uses a different data model, so teams should treat them as directional rather than exact.
Cerebro was originally a reverse ASIN tool; Magnet was a seed-keyword discovery tool. Helium 10 merged both into a single interface in January 2026. Sellers can now enter an ASIN or a keyword from the same screen and switch between competitor-driven and exploratory research modes.
Most major tools support multiple Amazon marketplaces, though coverage depth varies. Helium 10, Jungle Scout, and DataDive cover the main English-language and European markets. MerchantWords covers 11 marketplaces for the broadest international reach.
Teams expanding globally should verify marketplace support before committing.
Entry-level options like Sonar (free), Keepa (around $21/month), and Sellerboard ($15/month) keep costs low. A mid-tier all-in-one like Helium 10 Platinum runs $99/month on annual billing, and specialist tools like DataDive Standard add $149/month. Agencies typically stack two or three tools and budget $200 to $400/month for the research layer.
For more on agency selection, see 7 Best Amazon Agencies in 2026: A Buyer's Guide. For the buying process, see The Definitive Guide to Hiring an Amazon Agency in 2026.
Multi-channel brands can also read 7 Best Amazon + TikTok Shop Agencies for Multi-Channel Brands. Brands selling on TikTok Shop will find cross-channel strategy in 7 Best TikTok Shop Agencies in 2026: A Buyer's Guide.
