Best AI tools to add audio to video
Top picks at a glance:
- BeatViz — AI platform that transforms music and text prompts into synchronized, cinematic music videos.
- SpeechGen — Online AI voice generator with realistic voices for text-to-speech, transcription, and audio production.
- Black Forest Labs — Frontier AI research lab building foundational infrastructure for visual intelligence.
- PixVerse — A full-stack AI media generation platform powered by proprietary video foundation models for creating and scaling video.
- Pika — Create AI videos, automate workflows, use agents, and more.
| Tool | What it does | Pricing | Free tier | Refunds |
|---|---|---|---|---|
| BeatViz | AI platform that transforms music and text prompts into synchronized, cinematic music videos. | Free tier; paid from $20.70/mo | Yes | None stated |
| SpeechGen | Online AI voice generator with realistic voices for text-to-speech, transcription, and audio production. | Free tier | Yes | — |
| Black Forest Labs | Frontier AI research lab building foundational infrastructure for visual intelligence. | Not stated on site | No | None stated |
| PixVerse | A full-stack AI media generation platform powered by proprietary video foundation models for creating and scaling video. | Not stated on site * | — | — |
| Pika | Create AI videos, automate workflows, use agents, and more. | Free tier; paid from $8/mo | Yes | — |
— means the vendor does not state it on the pages we read.
* pricing not verified against the vendor's pricing page.
How do I choose an AI tool to add audio to video?
To select the best tool, first identify your platform needs; options like PixVerse offer desktop and mobile support, whereas others are web-only. If you require automation, prioritize services that offer an API, such as SpeechGen, Black Forest Labs, PixVerse, or Pika. Budget is another primary filter, as Pika and BeatViz offer paid tiers while others do not specify pricing. Carefully examine the terms of service, as Black Forest Labs and PixVerse impose strict limitations on commercial usage and model training. Finally, consider the subscription logistics. SpeechGen does not auto-renew, while BeatViz and Black Forest Labs explicitly state no refunds. Ensure the chosen platform’s specific task—ranging from generating background music to syncing audio—aligns precisely with your project requirements.
BeatViz
Visit BeatVizbeatviz.aiCancellation & refund terms for BeatViz
AI platform that transforms music and text prompts into synchronized, cinematic music videos.
Even without your audio, it generates original music, sound effects, and dialogue based purely on your vision.
Pricing, in their words: “Billed annually” (pricing)
Subscription terms they state: cancel in-app · auto-renews · states no refunds (source)
No usage limits stated on the pages we read.
SpeechGen
Visit SpeechGenspeechgen.io
Online AI voice generator with realistic voices for text-to-speech, transcription, and audio production.
Upload a subtitle file — each line is voiced at its exact timecode.
Pricing, in their words: “Pay as you go — no subscription! Buy Credits when you need them!” (pricing)
Subscription terms they state: does not auto-renew (source)
No usage limits stated on the pages we read.
Black Forest Labs
Visit Black Forest Labsblackforestlabs.ai
Frontier AI research lab building foundational infrastructure for visual intelligence.
Optional audio. Multilingual speech, effects and ambience generated with the frames.
Pricing, in their words: “Fees for the Services are charged on a pay-per-use basis through the purchase of service credits” (pricing)
Subscription terms they state: cancel in-app · states no refunds (source)
Limits the vendor states:
- no commercial use on non-commercial licensed models
- no use to train or distill other AI models
PixVerse
Visit PixVersepixverse.ai
A full-stack AI media generation platform powered by proprietary video foundation models for creating and scaling video.
Lip SyncVoice, sync, and sound.
Limits the vendor states:
- Commercial use of Platform Creative Materials is prohibited without authorization
Create AI videos, automate workflows, use agents, and more.
Source: pika.art
Pricing, in their words: “Subscription Pricing Pika has four plans, so you can pick what fits your needs.” (pricing)
Subscription terms they state: cancel in-app (source)
No usage limits stated on the pages we read.
FAQ
Is there a free tool to add audio to video?
Yes — BeatViz, SpeechGen, Pika offer a free tier.
What is the cheapest paid option to add audio to video?
Pika starts at $8/month.
Which of these have an API?
SpeechGen, Black Forest Labs, PixVerse, Pika document a developer API.
How do I cancel these subscriptions?
BeatViz: cancel in-app; Black Forest Labs: cancel in-app; Pika: cancel in-app. SpeechGen, PixVerse do not state a cancellation route on the pages we read.
Can I get a refund?
BeatViz states it does not offer refunds; Black Forest Labs states it does not offer refunds. The others (SpeechGen, PixVerse, Pika) do not state a refund policy on the pages we read.
Do these subscriptions auto-renew?
BeatViz states that paid plans renew automatically. Check the billing page before subscribing; the rest do not state it either way.
Sources
Every fact above was read from the vendors' own pages: