Comparison
Threnic vs Specterr
Both Threnic and Specterr make audio-reactive music and lyric videos. The core difference: Threnic renders locally in your browser on your own GPU — your audio never uploads — while Specterr is a cloud renderer. Here's an honest comparison to help you pick.
The main difference: local vs cloud
Specterr renders your video on its servers, which means your audio is uploaded and you wait in a render queue. Threnic renders on your own machine using WebGL/WebGPU and the WebCodecs API, so your files stay private and there is no queue — the trade-off is that Threnic needs a capable desktop GPU and a Chromium browser.
If keeping an unreleased track off third-party servers matters to you, or you dislike render queues and per-render limits, Threnic's local-first model is the reason to switch. If you're on a low-power laptop or mobile and don't mind uploading, a cloud tool may suit you.
| Threnic | Specterr | |
|---|---|---|
| Rendering | Local (your GPU) | Cloud |
| Audio uploaded | ✕ | ✓ |
| Install required | ✕ | ✕ |
| 4K export | ✓ | ✓ |
| Audio-reactive effects | ✓ | ✓ |
| Word-by-word lyric sync | ✓ | ✓ |
| Works offline after load | ✓ | ✕ |
| Free tier | yes (watermarked 1080p) | yes (watermarked) |
Frequently asked questions
What's the biggest difference between Threnic and Specterr?
Threnic renders locally in your browser on your own GPU, so your audio never uploads and there's no render queue. Specterr renders in the cloud.
Is Threnic free?
Yes — the free tier includes the full effect suite and exports at 1080p with a small watermark. Pro/Lifetime unlocks 4K, 60fps, and watermark-free export.
Which should I choose?
Choose Threnic if privacy, no upload, and no render queue matter and you have a desktop GPU + Chromium browser. A cloud tool may fit better on low-power or mobile devices.
See it render locally
Try Threnic free — no upload, no queue, full effect suite. Compare it to your current tool.
Open Threnic> LOCAL_RENDER · NO_UPLOAD · FREE_TIER