Alternative
Looking for an Audo AI Alternative?
Audo is a pay-per-minute toolbox. Diffio does one job: restoring recorded speech.
Our verdict
Diffio fits when a recording you already have needs its speech restored from background noise, room echo and some distortion in one pass, with the background kept on its own track and a transcript. Pick Audo for a quick free fix of the first minute without an account, pay-as-you-go credits that never expire, or a toolbox of cutting, converting and captioning tools. Diffio hasn't tested Audo.
What Audo Does Well
- Free without an account. Noise removal and the audio enhancer clean the first minute of a file, 3 times a day, with no sign-up.
- Pay by the minute. No subscription; credits never expire and are charged only when a job succeeds.
- Two speech tools. Remove noise takes the noise out and leaves the voice as recorded; the audio enhancer is for echo, muffled sound and distortion and rebuilds the voice, as Audo describes them.
- A toolbox around them. Remove echo, a voice isolator, a vocal remover and stem splitter, transcription, filler-word removal, captions and audio and video editing tools.
- Assistants and an API. ChatGPT, Claude and other assistants can run its tools, and the API spends the same credits.
When Audo Is the Better Pick
- One short clip, no account. The first minute of a file is free, 3 times a day.
- Occasional use. Credits never expire, so there is no monthly fee for months you don't use it.
- Many small jobs. Cutting, converting, captions and filler-word removal sit next to noise removal.
- Working from an AI assistant. Audo's tools run from ChatGPT, Claude and other assistants.
When Diffio Fits Better
- Noise and room echo together. Diffio handles both, plus some clipping and distortion, in one pass instead of choosing between tools.
- You want the background back at your own level. Every result has restored speech and a background track, with a Background amount slider.
- A transcript with every result. No separate transcription step.
- Regular volume. Diffio Basic covers 6 hours a month for $8, about $1.33 an hour used in full.
Diffio vs Audo by Workflow
| Need | Diffio | Audo |
|---|---|---|
| Primary job | Restore recorded speech: background noise, room echo and some clipping or distortion | A set of online audio and video tools, including Remove noise, Remove echo and an audio enhancer |
| What you get back | Restored speech and the background as 2 tracks, a Background amount slider to mix them and a transcript | The processed file |
| Free | 3 uploads in total with a 2-minute preview of each result | Noise removal and the audio enhancer on the first minute of each file, 3 times a day, with no sign-up |
| Paid model | Monthly plans: Basic $8/month (6 h), Pro $29/month (30 h) | Credit packs, no subscription. Noise removal and the audio enhancer use 5 credits a minute (300 an hour, $3 at 1 cent a credit); larger packs add bonus credits, and credits never expire. |
| Formats | Audio: MP3, WAV, M4A, AAC, FLAC, OGG. Video: MP4, MOV, AVI, MKV, WebM | In: WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM and AIFF audio; MP4, MOV, MKV, WebM and AVI video. Out: the original format, WAV, MP3, M4A or FLAC |
| File limits | Up to 2 GB and 90 minutes per file | Up to 10 GB per file; whole files up to 10 hours when signed in |
| API | REST API with Python and Node SDKs, $5 or $10 an hour billed per second | API on the same pay-as-you-go credits as the website |
| Diffio-run speech enhancer test | Diffio 4.6 Pro: SCOREQ +2.31 on average, word error rate 10.5%. Method and every clip. | Audo was not in that test |
How Much Does Audo Cost?
Checked November 3, 2026 in US dollars: Audo has no subscription. Free use covers noise removal and the audio enhancer on the first minute of each file, 3 times a day, with no sign-up. Noise removal and the audio enhancer use 5 credits a minute (300 an hour, $3 at 1 cent a credit); larger packs add bonus credits, and credits never expire. Packs run from $5 for 500 credits (first purchase only) to $100 for 16,000 credits, about $1.88 an hour. Check Audo's current pricing before buying, or compare cost per hour on AI audio enhancer pricing.
Diffio Plans and API
The Diffio Free web plan includes 3 uploads in total (not monthly), audio or video, and plays back the first 2 minutes of each result. Paid Basic ($8 per month) includes 6 hours (360 minutes) of audio or video per month, and paid Pro ($29 per month) includes 30 hours (1,800 minutes) per month, with full playback and downloads. Every plan accepts files up to 2 GB and 90 minutes long. The public API is billed per second, $5 an hour for Diffio 4.6 Flash and $10 an hour for Diffio 4.6 Pro, with a $5 starting credit. Check current Diffio prices or API pricing.
Has Diffio Tested Audo?
Diffio hasn't tested Audo, so this page makes no quality claim about it. Diffio's own AI speech enhancer test ran Diffio, Adobe Podcast, Cleanvoice, Auphonic, ElevenLabs and Descript Studio Sound on the same 59 real recordings on October 22, 2026; play the clips there, or upload your own recording to Diffio and compare it with Audo yourself.
Hear the Difference
Lecture recording: toggle Original vs Enhanced by Diffio.
FAQ
Is Audo AI free?
Partly. As checked November 3, 2026, Audo's free use covers noise removal and the audio enhancer on the first minute of each file, 3 times a day, with no sign-up. Whole files use paid credits.
How much does Audo AI cost?
Checked November 3, 2026: Audo has no subscription. Free use covers noise removal and the audio enhancer on the first minute of each file, 3 times a day, with no sign-up. Noise removal and the audio enhancer use 5 credits a minute (300 an hour, $3 at 1 cent a credit); larger packs add bonus credits, and credits never expire. Packs run from $5 for 500 credits (first purchase only) to $100 for 16,000 credits, about $1.88 an hour.
Does Audo have an API?
Yes: API on the same pay-as-you-go credits as the website. Diffio's API restores recorded speech at $5 an hour (Flash) or $10 an hour (Pro), billed per second.
Can Audo or Diffio remove music from a song?
Neither is built for songs. Audo says its noise removal is made for speech and turns a song's music down as if it were noise. Diffio moves music under speech to a separate background track. For song stems, a music tool such as LALAL.AI fits.
Sources Checked November 3, 2026
Audo facts were checked November 3, 2026 on its own pages: Audo pricing and per-tool credit costs, Audo noise removal and Audo home page, file limits and API example. Diffio is not affiliated with or endorsed by Audo. Product names are trademarks of their owners.
Try Diffio Free
Upload a speech recording and hear the restored speech next to the original.