framer motionvsmotion one

what each one actually is

Framer Motion is a react animation library known for its declarative api, automatic layout animations, and built-in gesture support (drag, hover, tap) — the most feature-rich option specifically for react developers building interactive ui.

Motion One is a lightweight, framework-agnostic animation library built directly on the web animations api, designed for minimal bundle size and strong performance across any javascript environment, not just react.

pricing, honestly

both are free and open source under permissive licenses with no paid tier for the core library. there's no pricing decision here — the tradeoff is purely technical: bundle size and feature set versus framework flexibility.

what it's actually like to use them

framer motion's api is declarative and component-based — wrap an element in motion.div, set animate and transition props, and complex layout transitions or gestures often just work with minimal extra code. the layout animation system in particular handles things that would otherwise require careful manual calculation.

motion one's api is more low-level and closer to the native web animations api it's built on — you get fine control and a tiny footprint, but some of the higher-level conveniences (automatic layout animation, built-in drag gestures) that framer motion provides aren't there in the same form.

who framer motion is for

• react projects needing automatic layout animations between state changes
• ui with drag, hover, or tap gesture interactions baked into animated components
• teams that want a declarative, component-first animation api inside react

who motion one is for

• projects outside react (vue, svelte, vanilla js) needing a lightweight animation library
• performance-sensitive projects where bundle size genuinely matters
• developers comfortable working closer to the web animations api for fine-grained control

when to avoid each

don't use framer motion outside react — it's built specifically for react's component model and isn't a good fit for other frameworks or vanilla js projects.

don't expect motion one to replicate framer motion's automatic layout animation and gesture system out of the box — you'll write more manual logic to achieve similar effects.

stuff their landing pages won't tell you

• the two libraries are technically converging (shared maintainers, shared underlying engine work) which means feature gaps may narrow over time — check current docs rather than assuming a permanent capability split
• framer motion's bundle size, while larger than motion one's, is still reasonable for most production react apps — the difference matters most in genuinely bundle-size-sensitive contexts (widgets, embeds)
• motion one's lower-level api means more decisions land on you — teams without animation experience may find framer motion's higher-level abstractions produce better results faster
• both libraries' gesture and layout animation features can interact unexpectedly with css transitions/animations defined elsewhere — test combined usage carefully rather than assuming clean isolation
• naming has shifted over time (the "motion" brand now spans multiple packages) — double check you're installing the package you actually intend to, since names have evolved

the call

motion one when bundle size or framework independence matters — it's lean, fast, and works anywhere javascript runs, not just inside react.

framer motion when you're building in react and want its richer declarative api — automatic layout animations and built-in gestures save real development time for interactive react ui, even at a larger bundle cost.