Pick a replacement by the voice job you do most, not by the size of the voice library. Narration and voiceovers, changing a recorded voice, listening to text and spotting fake audio are four different jobs, and most tools are built around one of them. Then hear each one read your own script before you commit.
Uberduck's own homepage bundles a lot together: sung vocals for music, spoken voiceovers for video, turning typed words into speech, swapping one voice for another and copying a real voice. If you only ever used one or two of those, you don't need a like-for-like swap. You need the tool that does your one job well. Below are eight AI voice tools in no particular order, sorted by the job each is built for.
Hear every voice read your own script
Demo clips on a voice tool's homepage are chosen to sound their best. They're short, they use easy sentences and they never stumble over a product name, a place name or a long list. Your scripts will. So the one test that matters is simple: paste the same real script into every tool on your shortlist and listen to the results back to back, ideally with headphones and with someone who hasn't heard them before.
Listen for the small things. Does the voice pause where a comma sits? Does it rush through numbers or brand names? Does a question sound like a question? Does it hold the same tone across a longer piece, or drift halfway through? A voice that sounds natural for ten seconds can sound flat over five minutes of training content.
The second check is the one people skip: what you're allowed to do with the audio. Read each vendor's terms for commercial use, and look closely at anything involving cloning or converting a real person's voice. You'll want written consent from anyone whose voice you copy, and the law on AI voices and likeness isn't the same everywhere, so ask a legal adviser in your own country before a cloned voice goes into an advert or a client project.
Four voice jobs, four kinds of tool
Narration and voiceovers
ElevenLabs, Murf, Typecast and Revoicer turn written scripts into spoken audio for videos, courses, adverts and explainers. Some lean towards lots of languages and developer access, others towards emotion and character, so match them to the content you make most.
Changing a voice you've recorded
Altered and Voice.ai start with your own voice and change it. That suits podcasters, streamers and game makers who want to keep their own timing and delivery but sound like someone else.
Listening instead of reading
Speechify is built for people who want documents and web pages read to them. It's a different job from producing a voiceover, and worth knowing about if that's what you used Uberduck for.
Protecting against fake audio
Resemble AI now leads with deepfake detection for enterprises. If your worry is fake voices rather than making new ones, it belongs on your list; if you only need voiceovers, look elsewhere first.
The eight voice tools at a glance
| Tool | Kind of tool | Good for |
|---|---|---|
| Altered | Voice changer studio | Reshaping a voice you've already recorded |
| ElevenLabs | Speech and voice agents | Lifelike narration in many languages, with developer APIs |
| Murf | Voiceover studio and agents | Business voiceovers and conversational voice agents |
| Resemble AI | Deepfake detection and voice | Checking audio and video for deepfakes |
| Revoicer | Emotion-based text to speech | Voiceovers where tone and emotion matter |
| Speechify | Read-aloud and voice typing | Listening to documents, PDFs and web pages |
| Typecast | Expressive voiceover generator | Emotional character voices for video |
| Voice.ai | Voice changer, speech and agents | Voice changing and text to speech on one account |
Every option, A to Z
Sorted by name only. The notes under each tool are my plain-English take on what its maker says it does.
Altered
Best for: Podcasters, game makers and video teams who want to change a recorded voice into another; the vendor sells voice changing software, including a real-time option.
ElevenLabs
Best for: Teams producing voiceovers or voice agents across many languages; the vendor offers a large voice library plus APIs for developers building speech into products.
Murf
Best for: Businesses making human-sounding voiceovers for training, adverts or explainers, which the vendor extends into conversational agents you can deploy.
Resemble AI
Best for: Larger organisations worried about fake audio; the vendor's homepage now leads with real-time deepfake detection, on-premises or in the cloud, rather than voiceover creation.
Revoicer
Best for: Solo creators and marketers who want text read with feeling; the vendor describes an emotion-based generator for human-sounding speech online.
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Speechify
Best for: People who'd rather listen than read; the vendor's focus is reading books, PDFs and web pages aloud, with voice typing alongside and a free plan named.
Typecast
Best for: Video creators who want emotional, expressive voiceovers rather than flat narration, which the vendor names as its main focus.
Voice.ai
Best for: Creators wanting a voice changer, text to speech and voice agents in one place; the vendor names a free plan and APIs for developers.
My advice on choosing an AI voice
Start with the job, then let your ears decide. If you mostly produce voiceovers for video or training, shortlist two narration tools and one voice changer, run your script through each, and play the results to someone who'll be honest with you. If people can tell it's synthetic in the first sentence, it'll distract from your message, however good the rest is.
Think about who'll use it, too. A tool with an API matters if a developer is building speech into your app or website; it doesn't matter at all if a marketer is making three videos a month. And if you're producing content in more than one language, test each language separately, because a voice that's lovely in English can sound odd elsewhere. For wider shortlists, see my guides to the best AI voice generators, text to speech software and AI voice cloning tools.
What to ask each voice vendor
- Can I use the audio commercially, in adverts, client work and courses I sell, and does that change by plan?
- If I clone or convert a voice, what consent do you need from the person whose voice you're using?
- Can I fix pronunciation of names and brand terms, and does the fix stick across projects?
- Which languages and accents are available in the voices I'd use most?
- Can I download the audio in the format my video editor or podcast host needs?
- What happens to my scripts and voice recordings, and can I delete them?
Do you make AI voice or text to speech software? Tool makers can ask to be considered for a featured place on this list.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
What's the difference between text to speech and voice changing?
Text to speech turns written words into spoken audio. A voice changer starts with a recording of you speaking and changes how your voice sounds, keeping your timing and delivery.
Can I use an AI voice for a client's advert?
That comes down to the licence, not the voice. Some plans cover client work you charge for and some don't, so find the commercial use clause in each vendor's terms before a client hears a single line.
Is it legal to clone someone's voice?
There's no single answer, because each country treats voice and likeness differently. What holds everywhere is consent: get the person's permission in writing, and take legal advice locally before using the clone commercially.
How do I make an AI voice sound less robotic?
Write for the ear: shorter sentences, clear punctuation and no long lists. Most tools also let you adjust pace and pauses, which helps more than switching voices.
Do I need an API?
Only if a developer is building speech into an app, website or phone system. For making videos, courses and podcasts, the normal web studio is enough.
Can AI voices handle more than one language?
Many can, but quality varies by language. Test the exact languages you need with your own script before you switch.
