GSAP vs Framer Motion: A Deep Dive
Every serious web developer working on animated interfaces eventually faces this decision. You need complex animations. You are building in React. You have two primary options that dominate the landscape: GreenSock Animation Platform (GSAP) and Framer Motion. Both are excellent. Both are widely used. Both can produce results that look nearly identical on screen.
But they are philosophically different tools, built with different design goals, and the choice between them has consequences that compound over the lifetime of a project.
This is our honest, detailed assessment after building with both extensively.
What Each Library Was Built to Do
GSAP was created in 2004 as a Flash animation library and was ported to JavaScript in 2008. It has been in continuous development for over 20 years and powers a huge percentage of the industry's most complex animated experiences. Its core design goal is absolute control: give the developer the ability to animate anything, with surgical precision, at maximum performance.
Framer Motion was created in 2019 as the animation layer for the Framer design tool and was subsequently released as a standalone React library. Its core design goal is integration: make animation feel native to the React component model, declarative, and accessible to developers who think in terms of state and props rather than timelines and tweens.
These different design goals produce libraries with meaningfully different strengths.
The Developer Experience Comparison
For a React developer who is already comfortable thinking in terms of state, props, and declarative rendering, Framer Motion's API is immediately intuitive.
// Framer Motion: Declarative, state-driven
<motion.div
initial={{ opacity: 0, y: 20 }}
animate={{ opacity: 1, y: 0 }}
transition={{ duration: 0.6, ease: "easeOut" }}
>
Hello world
</motion.div>
The initial, animate, exit, and variants API maps directly onto how React developers already think about component state. The AnimatePresence component handles exit animations when components unmount — a genuinely difficult problem that Framer Motion solves elegantly.
GSAP, by contrast, uses an imperative API that feels more like jQuery than React:
// GSAP: Imperative, timeline-driven
useEffect(() => {
const ctx = gsap.context(() => {
gsap.fromTo(
element.current,
{ opacity: 0, y: 20 },
{ opacity: 1, y: 0, duration: 0.6, ease: "power3.out" }
);
});
return () => ctx.revert();
}, []);
This feels less idiomatic in a React codebase, and the cleanup requirements (gsap.context() and ctx.revert()) add boilerplate that Framer Motion handles automatically. For simple entry animations on components, Framer Motion is genuinely faster to develop with.
Where GSAP Becomes Dominant
For anything beyond simple enter/exit animations, GSAP's capabilities expand dramatically while Framer Motion's reach its limits.
ScrollTrigger: The Most Powerful Scroll Animation Tool on the Web
GSAP's ScrollTrigger plugin is arguably the single best argument for choosing GSAP. It handles:
- Scrubbed animations: Animations that play in direct proportion to scroll position, creating smooth parallax and reveal effects that feel physically tied to the page
- Pinned sections: Elements that stick to the viewport while the rest of the page scrolls, enabling horizontal scroll sections, stacked card reveals, and section-based narratives
- Complex triggers: Start and end positions that can be defined relative to any element, with configurable scrub smoothing, debug markers, and event callbacks
Framer Motion has useScroll and useTransform hooks that can replicate some of this functionality, but they lack the granular control and optimization that ScrollTrigger provides. For complex scroll-driven narratives — the kind that win Awwwards — GSAP + ScrollTrigger is the industry standard for good reason.
Timeline Control
GSAP timelines give you orchestration capabilities that have no equivalent in Framer Motion:
const tl = gsap.timeline({ defaults: { ease: "power3.out" } });
tl.from(".headline", { y: 100, duration: 0.8 })
.from(".subheadline", { y: 60, duration: 0.6 }, "-=0.4")
.from(".cta-button", { scale: 0, duration: 0.4 }, "-=0.2")
.from(".background-image", { scale: 1.1, duration: 1.2 }, 0);
The ability to precisely control overlap (via the position parameter), pause and resume timelines on interaction, seek to specific points, and reverse animations with a single method call gives GSAP an expressiveness that Framer Motion cannot match.
Performance Under Load
This is where the difference becomes most tangible in production. GSAP is built around a ticker that runs on the requestAnimationFrame loop and applies all animations in a single pass, batching DOM reads and writes to prevent layout thrashing. It bypasses React's render cycle entirely, mutating the DOM directly.
Framer Motion runs animations through React's rendering system for state-based animations, and through direct DOM manipulation (via its own internal system) for layout animations. For simple cases, this works well. For 100+ animated elements — a kinetic typography reveal where each letter is animated individually, for example — GSAP maintains a smooth 60fps where Framer Motion may stutter.
We have seen this play out repeatedly in real projects. A stagger animation across 200 letter spans using GSAP runs at 60fps on mid-range hardware. An equivalent implementation in Framer Motion with variants and staggerChildren can drop to 45fps on the same machine, because each child component re-renders independently.
The Bundle Size Reality
For a fair comparison:
- Framer Motion v12: ~50-80KB gzipped (varies with code splitting)
- GSAP core: ~28KB gzipped
- GSAP + ScrollTrigger: ~50KB gzipped
- GSAP + ScrollTrigger + SplitText: ~65KB gzipped (note: SplitText requires a Club license)
Bundle size is roughly comparable. Neither library is lightweight by absolute standards, but both are justifiable for a site that makes animation central to the experience. The critical issue is loading both — which adds 100-160KB of animation library for a single site — which is why we made the architectural decision to use GSAP exclusively at Ruberio and replace our Framer Motion usage entirely.
When to Choose Framer Motion
The honest answer is that Framer Motion is the better choice in specific contexts:
Component-level transitions: For straightforward enter/exit animations on UI components — modals, tooltips, dropdowns, toasts — Framer Motion's AnimatePresence API is genuinely superior in developer experience and hard to improve upon.
Design system work: If you are building a shared component library, Framer Motion's declarative API makes animation intent more legible and composable across a team. The variants system is especially good for expressing complex animation states in a way that non-animation-specialist engineers can understand and maintain.
Smaller projects: For a project with limited animation complexity — some entrance animations, a few hover states, a simple page transition — Framer Motion's lower learning curve produces results faster.
Our Recommendation
For projects where animation is a core part of the product — marketing sites, portfolio sites, interactive applications where motion is fundamental to the user experience — GSAP is the professional standard. It is more powerful, more performant, and provides the control that complex creative work demands.
For product applications where animation is a supporting element — a component library, an enterprise tool, an app where motion enhances usability rather than creates experience — Framer Motion is excellent and perhaps preferable.
Never use both on the same project unless you have a very specific reason. The bundle overhead is unjustifiable, and the mental context-switching between two completely different animation models creates maintenance friction over time.
At Ruberio, we use GSAP. We use it for cursor animation, for page transitions, for scroll-triggered reveals, for kinetic typography, for hover interactions, for loading sequences. We replaced our Framer Motion usage entirely, and the codebase is more consistent and better performing as a result.
Know your tools. Choose deliberately. Animate with intention.