Best AI Alt Text Generators in 2026
Updated
In short: Altagonist is ranked #1 of 27 as of 9 October 2026, ahead of ALTtext.org and AI Alt Text Builder. The best-ranked option with a free plan is ALTtext.org. The lowest first paid tier on this page is WriteAlt at $0.26/mo.
AI alt text generators can help create image descriptions within a publishing workflow. Compare supported image formats and languages, then consider API access, bulk processing, CMS plugins and custom generation rules. Publishing workflows, free-plan availability and paid-from pricing are also listed, helping you assess how a tool might fit your process and budget. Alt Audit, AltTextLab and Altvisor are among the entries. Look at where descriptions are created and published, and which integrations, processing options or controls matter for that work.
27 AI alt text generators ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
16 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | AltagonistWeb · Windows | Two bars | — | 2 of 6 | €5/mo | 6.5 | |
| 2 | ALTtext.orgWeb · Mac · iPhone · Extension | Three bars | — | 3 of 6 | $19.99/mo | 6.5 | |
| 3 | AI Alt Text BuilderWeb | Two bars | — | 1 of 6 | $2.99/mo | 6.4 | |
| 4 | Alt AuditWeb · API | Two bars | — | 1 of 6 | $5/mo | 6.4 | |
| 5 | Alt Text ProWeb · API | Two bars | — | 1 of 6 | $3.60/mo | 6.4 | |
| 6 | AltGenWeb · API | Two bars | — | 1 of 6 | $29/mo | 6.4 | |
| 7 | AltText.ioWeb · API · Extension | Two bars | — | 1 of 6 | $19/mo | 6.4 | |
| 8 | AltTextAPIWeb · API | Two bars | — | 1 of 6 | $9/mo | 6.4 | |
| 9 | AltTextLabWeb · API · Extension | Two bars | — | 1 of 6 | $4/mo | 6.4 | |
| 10 | AltvisorWeb | Two bars | — | 1 of 6 | €12/mo | 6.4 | |
| 11 | ATaaSWeb · API | Two bars | — | 1 of 6 | $6.58/mo | 6.4 | |
| 12 | AutoAlt.aiWeb · API · Extension | Two bars | — | 1 of 6 | $4.49/mo | 6.4 | |
| 13 | Uix Page BuilderWeb · Self-hosted | Two bars | — | 1 of 6 | Free | 6.4 | |
| 14 | AI Alt Text GeneratorWeb | Two bars | — | 1 of 6 | Free | 6.3 | |
| 15 | AI Image Alt Text GeneratorWeb · Self-hosted | Two bars | — | 1 of 6 | Free | 6.3 | |
| 16 | ALTerExtension | Two bars | — | 0 of 6 | Free | 6.2 | |
| 17 | Alt Text StudioWeb · Extension | One bar | — | — | 1 of 6 | $4/mo | 5.5 |
| 18 | ALTificationWeb · Extension | One bar | — | — | 1 of 6 | $9.99/mo | 5.5 |
| 19 | AltText.aiWeb · API · Extension | One bar | — | — | 1 of 6 | $4.08/mo | 5.5 |
| 20 | ImageComplyWeb · Windows | One bar | — | — | 2 of 6 | $25/mo | 5.5 |
| 21 | AltaWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 22 | Seeing AIAndroid · iPhone | No signal | — | — | 2 of 6 | — | 5.2 |
| 23 | WriteAltWeb · Windows · Linux · API · Extension | Two bars | — | — | 3 of 6 | $0.26/mo | 5.2 |
| 24 | Alt Text IQWeb | One bar | — | — | 1 of 6 | $29/mo | 5.0 |
| 25 | easyAltWeb | No signal | — | — | 1 of 6 | $32.50/mo | 4.8 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Bulk processing | API access |
|---|---|---|---|---|---|---|---|---|
| 1 | Altagonist | 6.5 | Free plan | €5/mo | Yes | — | Yes | — |
| 2 | ALTtext.org | 6.5 | Free plan | $19.99/mo | Yes | — | Yes | Yes |
| 3 | AI Alt Text Builder | 6.4 | Free plan | $2.99/mo | No | 4.99 /mo | Yes | No |
| 4 | Alt Audit | 6.4 | Free plan | $5/mo | Yes | 5 /mo | Yes | Yes |
| 5 | Alt Text Pro | 6.4 | Free plan | $3.60/mo | Yes | 4 /mo | Yes | Yes |
| 6 | AltGen | 6.4 | Free plan | $29/mo | Yes | 29 /mo | Yes | Yes |
| 7 | AltText.io | 6.4 | Free plan | $19/mo | Yes | 19 /mo | Yes | Yes |
| 8 | AltTextAPI | 6.4 | Free plan | $9/mo | Yes | 9 /mo | Yes | Yes |
| 9 | AltTextLab | 6.4 | Free plan | $4/mo | Yes | 4 /mo | Yes | Yes |
| 10 | Altvisor | 6.4 | Free plan | €12/mo | Yes | — | Yes | Yes |
| 11 | ATaaS | 6.4 | Free plan | $6.58/mo | Yes | 9 /mo | Yes | Yes |
| 12 | AutoAlt.ai | 6.4 | Free plan | $4.49/mo | Yes | — | Yes | Yes |
| 13 | Uix Page Builder | 6.4 | Free plan | Free | Yes | — | Yes | Yes |
| 14 | AI Alt Text Generator | 6.3 | Free plan | Free | Yes | — | Yes | Yes |
| 15 | AI Image Alt Text Generator | 6.3 | Free plan | Free | Yes | — | Yes | Yes |
| 16 | ALTer | 6.2 | Free plan | Free | Yes | — | — | — |
| 17 | Alt Text Studio | 5.5 | No | $4/mo | No | 4 /mo | Yes | Yes |
| 18 | ALTification | 5.5 | No | $9.99/mo | No | — | Yes | Yes |
| 19 | AltText.ai | 5.5 | No | $4.08/mo | No | 5 /mo | Yes | Yes |
| 20 | ImageComply | 5.5 | No | $25/mo | Yes | 25 /mo | Yes | No |
| 21 | Alta | 5.2 | No | — | Yes | — | Yes | — |
| 22 | Seeing AI | 5.2 | No | — | Yes | — | — | — |
| 23 | WriteAlt | 5.2 | No | $0.26/mo | No | 3.17 /mo | Yes | Yes |
| 24 | Alt Text IQ | 5.0 | No | $29/mo | No | 29 /mo | Yes | No |
| 25 | easyAlt | 4.8 | No | $32.50/mo | No | 39 /mo | Yes | — |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which AI alt text generator is ranked first on Freedom251?
Altagonist is ranked #1 of 27 with a score of 6.5. ALTtext.org is second and AI Alt Text Builder third.
How many of these have a free plan?
16 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, WriteAlt has the lowest first paid tier we found: $0.26/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.