The best keyword tools for stock images fall into three groups: desktop metadata editors like Xpiks, multi-agency submission tools like StockSubmitter, and AI metadata generators like PhotoTag.ai and Rastock AI. Desktop editors give the most manual control, submission tools solve distribution, and AI generators solve the time cost of writing metadata at volume. Most contributors need two of the three.
That is the short version. The longer answer depends on how many files you publish, whether you work in video and vectors as well as stills, and whether your bottleneck is writing metadata or delivering files to agencies. This guide covers what each tool is genuinely good at and where it stops being the right choice — including where Rastock AI is not the answer.
The tools contributors actually use
Xpiks — Free and open-source desktop metadata editor for microstock, working with photos, vectors and video. A paid Pro tier adds advanced features and priority support. Best for: contributors who want full manual control over every keyword and prefer a local tool with no subscription. Limitation: the workflow is fundamentally manual with AI-assisted suggestions rather than generation, so it does not remove the per-file time cost at high volume.
StockSubmitter — A long-established desktop application focused on submitting to many agencies from one interface. Best for: contributors whose main problem is distribution across a large number of platforms rather than writing metadata. Limitation: it is a submission tool first; metadata authoring is still largely your job.
Wirestock — Takes a commission on your sales rather than charging a subscription, and handles submission to multiple agencies on your behalf. Best for: contributors who prefer no upfront cost and are comfortable with a revenue share. Limitation: the commission is permanent and applies to every sale, so over a multi-year portfolio it can cost considerably more than a flat subscription — worth modelling against your actual expected revenue rather than assuming free is cheaper.
PhotoTag.ai — A modern web-based AI keywording tool with a clean interface and solid visual recognition. Best for: contributors who want fast, accurate keyword generation for stills without installing desktop software. Limitation: it is focused on metadata generation, so delivery to agencies remains a separate step in your workflow.
Agency-native tools — Adobe, Shutterstock and others provide their own keyword suggestions inside their contributor portals. Best for: contributors submitting to one agency at low volume. Limitation: suggestions are formatted for that agency only, and you repeat the work for every additional platform.
Rastock AI — Generates metadata, embeds it as IPTC and delivers over FTP to 10+ agencies in one pass, producing per-agency keyword sets rather than one shared list. Best for: contributors publishing to several agencies at volume, across photos, video and vectors. Limitation: if you submit to one agency and publish a handful of files a month, this is more infrastructure than the problem requires — an agency's own suggestions will do.
When to use which
Xpiks vs an AI generator. Choose Xpiks if you value manual control and are working at a volume where per-file attention is realistic — a curated portfolio, or specialist work where you know things about the image the software cannot. Choose an AI generator once you are publishing more files per week than you can thoughtfully keyword, because that is the point at which manual quality starts degrading anyway.
StockSubmitter vs Rastock AI. Both solve multi-agency delivery. StockSubmitter is the right answer if your metadata is already written and distribution is the only gap. Rastock AI is the right answer if metadata is the bottleneck and you want per-agency formatting handled at the same time as delivery.
Wirestock vs a subscription tool. This is a pricing model decision, not a feature one. Wirestock costs nothing up front and takes a share of every sale, permanently. A subscription costs a fixed amount regardless of earnings. If your portfolio is small or your income uncertain, the revenue share is lower risk. If you expect meaningful ongoing revenue, run the twelve or twenty-four month numbers before assuming the free option is cheaper.
PhotoTag.ai vs Rastock AI. Both generate metadata with AI. The practical difference is scope: PhotoTag.ai focuses on generation, leaving upload as a separate step, while Rastock AI covers generation, IPTC embedding, per-agency CSV export and FTP delivery in one pass. If you already have a delivery method you are happy with, a generation-only tool is a smaller, simpler purchase.
Why per-agency formatting matters more than raw accuracy
Most comparisons focus on how well a tool describes an image. That matters, but for multi-agency contributors it is rarely the thing that breaks the workflow. Agency rules diverged sharply in 2026 and now actively conflict.
Adobe Stock accepts up to 49 keywords, reads embedded IPTC and offers no CSV import route. Shutterstock accepts up to 50 plus category assignments from a fixed list, applied by CSV after upload. Getty Images and iStock map to a controlled vocabulary and refuse externally generated AI content entirely. Freepik requires a mandatory _ai_generated flag on generative work. Alamy imposes no keyword cap but banned AI submissions outright from 1 September 2026, treating them as a material contract breach.
A single keyword list copied into all of those produces rejections in some places and poor discovery in others. A tool that writes excellent generic keywords still leaves you doing per-platform work by hand. Our Shutterstock CSV template guide covers one platform's format in detail, and the differences between platforms are larger than most contributors expect.
What no tool can do for you
Every AI keywording tool shares the same blind spots, because they all read pixels. None of them reliably know specific place names, editorial dates and events, precise species, or brand and product identification. None of them know the concept you intended in an abstract shot. The workflow that holds up is AI-first, human-reviewed: let the tool do the exhaustive work, then spend a few seconds correcting what only you know. Our guide to AI metadata generation covers where automated keywording holds up and where it needs supervision.
How to choose
Answer three questions honestly. How many files do you publish per month? How many agencies do you submit to? Is your bottleneck writing metadata or delivering files?
Under a hundred files a month to one or two agencies: agency-native suggestions or Xpiks are sufficient, and anything more is overhead. Several hundred files to two or three agencies: a generation tool like PhotoTag.ai plus your existing upload method works well. Volume across four or more agencies, especially with mixed media: you need per-agency metadata and automated delivery together, which is the case Rastock AI is built for.
There is no tool that is correct for every contributor, and anyone telling you otherwise is selling something. If your volume is genuinely low, the honest advice is not to buy software at all. If it is high and spread across agencies, the pricing page lists plans by monthly upload volume so you can compare against what your time is currently costing you.
Related reading
Tools That Read Your Photo and Write a Ranking Stock Title
Which Platforms Auto-Generate Titles, Descriptions and Keywords for a Whole Folder?
Software That Learns From Your Past Uploads to Improve Keywords
Frequently asked questions
What is the best tool for generating keywords for stock images?
There is no single best tool. Xpiks suits contributors who want manual control at moderate volume, PhotoTag.ai suits fast AI generation for stills, StockSubmitter solves multi-agency delivery, and Rastock AI combines per-agency metadata generation with FTP delivery. The right choice depends on your volume and how many agencies you submit to.
Is Xpiks still worth using in 2026?
Yes, for the right use case. It is free and open-source, works with photos, vectors and video, and gives full manual control over metadata. It is less suited to high-volume workflows because the process remains fundamentally manual, with AI-assisted suggestions rather than full generation.
Is Wirestock cheaper than a subscription tool?
Not necessarily. Wirestock charges no upfront fee and instead takes a commission on every sale, permanently. A subscription is a fixed cost regardless of earnings. For small or uncertain portfolios the revenue share carries less risk; for portfolios generating steady income, run the 12 to 24 month numbers before assuming it is cheaper.
Do AI keywording tools work for video and vectors?
Coverage varies. Xpiks handles photos, vectors and video. Some AI generators focus on stills only. Video needs additional fields that photo metadata does not — camera movement, shot type, frame rate, duration — so check that a tool covers those before committing a footage library to it.
Why can't I use the same keywords on every stock agency?
Because the rules conflict. Adobe caps keywords at 49 and reads only embedded IPTC, Shutterstock allows 50 plus fixed-list categories via CSV, Getty uses a controlled vocabulary and bans external AI, Freepik requires an _ai_generated flag, and Alamy banned AI submissions from September 2026. One shared list causes rejections on some platforms and weak discovery on others.
Should I still review AI-generated keywords?
Yes. Every vision-based tool shares the same blind spots: specific place names, editorial dates and events, precise species, brand identification, and the intended concept behind abstract work. The effective workflow is AI-first and human-reviewed — the tool does the exhaustive part, you correct what requires outside knowledge.
When is a keywording tool not worth buying?
When your volume is low. If you publish under a hundred files a month to one or two agencies, the agencies' own keyword suggestions or a free tool like Xpiks will cover you. Automation pays off when the per-file time cost multiplied by your volume exceeds what the software costs.