I Compared the Free Tiers of Google Flow, Kling AI, and Hailuo So You Don't Have To

A developer compared the free tiers of Google Flow (Veo 3.1), Kling AI, and Hailuo (MiniMax) to determine if they can be used for a monetized YouTube channel without paying. The comparison found that Kling and Hailuo explicitly exclude commercial use on their free tiers, while Google Flow's terms are unclear, leaving the developer to advise confirming with Google support before building on it.

In my last post https://justasideproject.blogspot.com/2026/08/i-tried-to-build-free-ai-shorts-channel.html , I mentioned pivoting away from AI-generated video after digging into the free tiers of the big three tools. Here's the actual digging — what each one gives you for free, and where the fine print gets in the way. I'm not affiliated with any of these tools. I just wanted a straight answer to "can I use this for a monetized channel without paying," and it took longer to find than it should have. | Tool | Free credits | Renewal | Max clip length free | Watermark | Commercial use on free tier | |---|---|---|---|---|---| | Google Flow Veo 3.1 | ~50 | Daily | 8 seconds | "Made with Veo" visible | Unclear — see below | | Kling AI | ~66 | Daily | ~5 seconds per generation | Visible | Explicitly excluded | | Hailuo / MiniMax | 200 | One-time new account bonus | ~6 seconds 768p | Visible | Explicitly excluded | Flow bundles Veo 3.1 video , an image model, and a music model into one workspace. The free allotment is roughly 50 credits a day, non-cumulative — use them or lose them. At the cheaper "Lite" quality setting that's enough for a handful of generations; the higher "Quality" tier alone can cost more credits than the entire daily allowance. The catch that matters most: I could not find a clear statement, in Google's own terms, that free-tier Veo output is cleared for monetized YouTube use. Some third-party writeups say yes, some say no, and they contradict each other on basic facts like whether the watermark is even there. If you're planning to monetize, this is worth confirming directly with Google support before you build anything on top of it — not something I'd take on a blog's word, including this one. Kling's free daily credit count is the most generous of the three, and the motion quality on character animation is genuinely good. But its free-tier terms are the most explicit of the group: no commercial use. That's a documented limitation, not a gray area, which actually makes it the easiest of the three to plan around — you know where you stand. Hailuo front-loads new accounts with a decent one-time credit bonus rather than a strong daily refresh, which makes it better suited to a short burst of experimentation than ongoing daily production. Same commercial-use restriction as Kling on the free tier. None of this means these tools are bad — the free tiers are still useful for experimenting and learning the workflow. It just means "free" and "free to monetize" aren't the same claim, and only one of them was easy to find a straight answer to.