Image Voice vs AltText.ai
Last updated: September 11, 2026
Nobody arrives on this page because AltText.ai writes bad alt text. By most accounts it does not — 4.5 stars across 141 reviews. People usually arrive because of the meter, or because a number they were shown did not match what they could see.
What its own reviewers say
The most useful review on AltText.ai's listing is a three-star one, edited on 30 June 2026, from a merchant with a large catalogue. It describes both of those problems — and then how they settled:
After the initial installation, we had some discrepancy issues between the "number of images without alt text" and the "number of images resolved." … This led us to be concerned about inflated credit usage. After giving it some time to process through all of our images, the daily reported issues seem to be much more accurate. Despite the initial headaches, I would still recommend this tool if you have a large cache of images you are trying to process.
The developer's reply underneath explains the credits: the store had processed "5,700+ images in your first two days, which blew past the 5,000 credits in your Titanium plan."
Read fairly, that is a good review of a tool that works, with two lessons in it. A count of images "resolved" is only useful if it matches what actually changed. And on a metered plan, a large catalogue spends its allowance fast.
A five-star review from 2 April 2026 makes the second point without complaining at all:
Works well - we have a very large catalogue so we will need several months to work through it.
That is a satisfied customer describing what a monthly allowance means for a backlog.
The arithmetic
AltText.ai's Shopify plans, from its App Store listing, checked 11 September 2026:
| Plan | Price | Images included |
|---|---|---|
| Pay as you go | $3 per 50 images | first 25 free |
| Bronze | $5 a month, or $49 a year | 100 a month |
| Silver | $19 a month, or $189 a year | 500 a month |
| Gold | $59 a month, or $489 a year | 2,000 a month |
Unused credits roll over, and you can buy additional credits on any plan. So a 3,000-image backlog on Gold is a choice between buying extra credits and spreading the work across months — the "several months" in the review above.
Image Voice prices the backlog instead of the image. Keeper is $8.90 a month and Curator is $28.90, and both open with a First Sweep that writes the existing backlog up front, in days. The monthly allowance after that only has to keep up with what you upload next.
Where AltText.ai is better, and it genuinely is
This is not a page about a bad app. On three counts it beats us outright:
- It has been judged. 4.5 stars across 141 reviews. Image Voice has none yet. If your shortlist rule is "nothing without a track record," that is a good rule and it excludes us.
- It carries the Built for Shopify badge. We do not. That badge is Shopify's assessment of performance, design and integration quality.
- 130+ languages. We write in nine — English, German, French, Spanish, Italian, Dutch, Portuguese, Japanese and Korean. If your store sells in Chinese, this comparison is already over and you should install theirs.
It also does look at the images. AltText.ai's homepage says its AI "automatically analyzes each image on your site," and its Shopify page adds that the app uses your product data as well. Anyone telling you it simply copies your product title into the alt field is wrong about it.
The thing Image Voice was built against is real — we have opened catalogues where every description began "image of" and ended in a keyword pile, worse than empty because it looks done. It is just not what AltText.ai does.
So what is actually different
AltText.ai writes alt text. Image Voice grades what you already have first, then writes it.
We are not the only app that checks existing alt text — ALTerator scores it out of 100, and Pixc scans for "poorly written" descriptions. What Image Voice does is narrower: it reads what is already in your alt fields, whatever wrote it, and sorts it four ways — missing, junk, weak, good — with a vision-checked sample you read yourself. A typical result reads "62 of 100 covered images don't describe the image." That is a sentence a count of filled fields cannot produce, and it speaks directly to the first lesson in the review above.
Three more differences:
- Nothing reaches your store unapproved. Every description goes through a keyboard queue built for 200 decisions in one sitting — approve, edit, skip. Auto-pilot exists, and it is offered only once your own approval record justifies it.
- Thirty-day undo, on every plan including free. Full before → after trail.
- The quality is gated, not trusted. Writing is checked against a fixed golden set, so no update can quietly degrade what you approved, and a weekly re-scan keeps your number true.
What to do about it
Run the free audit on the alt text AltText.ai already wrote for you. It costs nothing, it needs no card, and nothing is written to your store. You will get a grade on their output, on your own products.
If the grade comes back good — and on a well-run AltText.ai install it may — then you have your answer, you have it for free, and we will be the ones telling you to stay where you are.
For every Shopify alt text app side by side, see the full comparison, or alternatives grouped by why people switch.
Pricing, rating, badge and review quotations above were taken from the AltText.ai App Store listing and its review page, and the method and language claims from alttext.ai, on 11 September 2026. They may have changed since. We have not installed AltText.ai. Check the listing before you decide. AltText.ai is a trademark of its owner and this page is not affiliated with or endorsed by them.