Lottie vs Rive vs After Effects: Which to Use for UI Animation

Animation on websites and in apps used to mean GIFs or videos. Today, product teams have better options: Lottie files exported from After Effects, Rive's interactive animations, and video when nothing else fits. They solve different problems, and picking the wrong one costs either quality or engineering time. Here's how they compare and when to use each.

The short answer

• Lottie — for UI animations designed in After Effects that play the same way every time: loaders, onboarding illustrations, empty states, success animations, animated icons.
• Rive — for interactive animations that react to the user or the app's state: buttons, toggles, characters, game-like UI, animations driven by data.
• After Effects — the authoring tool behind Lottie, and the tool for everything that ends up as video: launch films, ads, social content.

What each one is

Lottie

Lottie is a file format and a set of open-source players. You animate in After Effects, export a JSON file (through the Bodymovin or LottieFiles plugins), and developers play it natively on the web, iOS and Android. Files are small and vector-sharp at any size. The dotLottie format packs one or more animations, with their assets, into a compressed file.

Rive

Rive is both an editor and a runtime. You design and animate inside Rive, then build state machines: logic that decides which animation plays, and how it blends, depending on inputs such as hover, click, a boolean or a number from the app. The runtime plays this interactively on web, mobile, desktop and game engines.

After Effects

After Effects is a motion design and compositing tool, not a runtime. It renders video, and through plugins, exports Lottie. For product teams, it's where many UI animations are designed — and where marketing films are made.

Side by side

	Lottie	Rive	Video (from After Effects)
Authoring	After Effects (plus LottieFiles tools)	Rive editor	After Effects and others
Interactivity	Basic: play, pause, segments, scrubbing	Built-in state machines and inputs	None
File size	Small for vector work	Very small	Larger, depends on resolution
Visual range	Limited subset of After Effects features	Vector, meshes, bones, its own feature set	Anything: 3D, effects, footage
Sharpness	Vector, any size	Vector, any size	Fixed resolution
Learning curve	Low if you know After Effects	A new tool and a new way of thinking	Standard

When to choose Lottie

• Your team already animates in After Effects.
• The animation plays linearly: illustrations, onboarding, loaders, confirmations.
• You want the huge library of ready-made Lottie animations and players for every platform.

Watch out for unsupported After Effects features: many effects, some layer styles, expressions and certain masks don't export, or export heavily. Design with the export in mind, test often, and keep shape layers simple.

When to choose Rive

• The animation must react: hover states, toggles, sliders, characters that follow the cursor, progress driven by data.
• You want one file that holds many states and transitions instead of many Lottie files and code to switch them.
• Performance and file size are critical, for example in apps and games.

Watch out for the learning curve and a separate tool in the pipeline: designers need to learn Rive, and assets don't move freely between Rive and After Effects.

When to stay with video

• 3D renders, footage, complex effects, gradients and textures that vector formats can't reproduce.
• Marketing content: launch films, social ads, hero videos on a landing page.
• When you need the exact same result everywhere, regardless of runtime support.

Modern video formats (WebM, MP4 with H.264 or newer codecs) are efficient enough for short loops on websites, and support transparency in some formats.

Designing for the handoff

Whatever the format, the animation has to survive the trip from the design tool to the product. A few habits save a lot of back-and-forth:

• Name everything. Layers in After Effects and inputs in Rive's state machines become the vocabulary developers use. "hover", "isLoading" and "progress" beat "Layer 12".
• Define the states up front. List every state a component can be in (idle, hover, pressed, disabled, loading, success, error) before animating, and the transitions between them.
• Agree on durations and easings. Share them as tokens (for example 150 ms for micro-interactions, 300 ms for panels) so code-driven and file-driven animations feel like one product.
• Respect reduced motion. Operating systems let people ask for less motion. Plan a calmer or static alternative for loops and large movements, and let developers switch to it.
• Ship a preview. A short video of the intended result, next to the Lottie or Rive file, helps developers check the implementation matches.

Performance in practice

Vector formats are light, but not free. Lottie files grow with the number of layers, masks, mattes and embedded images, and each frame is drawn by the player. Rive files are compact and its runtime is designed for real-time playback, but complex meshes and many simultaneous instances still cost CPU or GPU time. Video moves the cost to decoding, which phones do very efficiently, at the price of fixed resolution and larger files. When in doubt, build the animation in the simplest format that delivers the result, then profile it on a mid-range phone.

A practical workflow for product teams

1. Decide per animation, not per project: one product can use all three.
2. Static and linear UI moments in Lottie, interactive components in Rive, marketing in video.
3. Agree on a motion language — durations, easings, overshoot — and apply it across all three.
4. Test on real devices early, especially low-end phones.

For inspiration, browse UI and product animation in the Motionimo library, see our SaaS launch video examples, and check Resources for tools and plugins.

Frequently asked questions

Is Rive replacing Lottie?

Not entirely. Rive is stronger for interactive animation; Lottie remains the simplest path for After Effects animators and linear UI animations. Many teams use both.

Can I convert After Effects animations to Rive?

Not directly. Rive animations are built in Rive; you can import graphics, but motion is recreated in the editor.

Are Lottie files good for performance?

Usually, yes, for simple vector animations. Complex files with many layers, masks or images can be heavy; keep them lean and test on real devices.