Helium 10 and UltraWordCounter are not really the same kind of tool, and that is the point. Helium 10 is a full Amazon suite: keyword research, product and sales data, PPC, and inventory, priced for sellers scaling a business. UltraWordCounter does one part of that job, optimizing the listing itself, free up to 800 words. If you are not ready to pay $99 a month for the whole platform just to write a clean, compliant listing, here is how they compare.
| Feature | Helium 10 | UltraWordCounter |
|---|---|---|
| Price | Free plan is limited; paid from $99 a month (Platinum, billed annually) | Core tools free forever; the three Pro tools are free up to 800 words, then $12 a month for unlimited use |
| Best suited for | Full product research, analytics, and PPC at scale | Writing and checking a single strong listing |
| Title, bullet, and description character limits | Yes | Yes |
| Banned and restricted word check | Part of the suite | Yes, front and center |
| Mobile title cutoff preview | - | Yes |
| Keyword density for your listing text | Via its tools | Yes, single and multi-word |
| Keyword research database (Cerebro, Magnet) | Yes | No |
| Product and sales research (Black Box, Xray) | Yes | No |
| PPC management (Adtomic) | On the Diamond plan | No |
| Inventory and refund tools | Yes | No |
| Account required | Yes | No |
| Runs in your browser | Chrome extension and web app | Yes, processed client-side |
| Title builder that assembles a compliant title from your keywords | In the paid Listing Builder | Yes, free |
| Instant readability and skim check on your listing copy | Not a focus | Yes |
| Amazon image requirements checklist | Not a focus | Yes |
| Byte-aware backend search term counter | Not a focus | Yes |
| Works with no account and nothing to install | Account and Chrome extension required | Yes, runs in your browser |
Competitor pricing and limits are current as of 2026 and can change, check their site for the latest.
What Helium 10 does well
Helium 10 is the deepest Amazon toolset on the market, and it earns its reputation. Its keyword research (Cerebro and Magnet), product and sales research (Black Box and Xray), PPC management, and inventory tools are genuinely powerful, and if you are running a growing brand that lives or dies on that data, the subscription pays for itself. UltraWordCounter does not try to replace any of that.
Where UltraWordCounter fits
UltraWordCounter focuses on the listing itself. It tracks your title, bullet, and description character limits live, flags banned and restricted words before Amazon does, shows where your title gets cut off on mobile, and checks keyword density so you optimize without stuffing. For a seller who mainly needs to write and check a strong listing, that is the part of the job they actually touch every day.
The value difference
Since Helium 10 retired its $39 Starter plan, the entry paid tier is $99 a month. That is a real commitment for a new or budget-conscious seller, especially one with only a listing or two to optimize. UltraWordCounter's core tools are free forever, and its three Pro tools are free up to 800 words, then a flat $12 a month for unlimited use, with no account required to start. You get the listing-optimization job done without paying for research tools you are not using yet.
Which should you use?
Be honest with yourself about where you are. If you need keyword research, sales estimates, and PPC data to scale, Helium 10 is worth the price and UltraWordCounter will not replace it. If you are early, budget-minded, or you simply want to write a compliant, optimized listing without a $99-a-month platform, start with UltraWordCounter, it is free to try with no login, and you can always add a research tool later when you actually need one.
Try the free Amazon listing optimizer and see for yourself.
Open the Amazon FBA Listing Optimizer →