Alternative
Looking for an ElevenLabs Voice Isolator Alternative?
Diffio 4.6 Pro beat ElevenLabs on quality gain and word error rate across 59 real recordings.
Our verdict
Diffio is the better pick when the job is restoring speech in a recording you already have, with the background kept on its own track: in our 59-clip test, Diffio 4.6 Pro raised the SCOREQ speech quality score by 2.31 on average, against 0.79 for ElevenLabs. Pick ElevenLabs Voice Isolator if you already use ElevenLabs for text to speech, voice cloning or dubbing, or want one API call that returns the audio; for song vocals, use a music stem splitter.
1st of 2 on quality gain
Diffio 4.6 Pro
+2.31 quality gain
10.5% word error rate
How it ran: Public API, model diffio-4.6-pro, restored speech only. Returns MP3 192 kb/s.
2nd of 2 on quality gain
ElevenLabs Voice Isolator
+0.79 quality gain
18.1% word error rate
How it ran: API audio isolation (no settings exist). Returns MP3 320 kb/s.
Averages over all 59 clips. A higher quality gain (SCOREQ) and a lower word error rate are better; the untouched recordings had a 13.2% word error rate.
What ElevenLabs Voice Isolator Does Well
ElevenLabs Voice Isolator separates speech from background noise in audio and video. It sits inside a voice AI platform, which is its main draw for people who already use ElevenLabs.
- One credit pool for a voice platform. Voice Isolator shares credits with text to speech, voice cloning, dubbing, music and sound effects.
- A one-call API. POST /v1/audio-isolation returns the cleaned audio in the same response, with Python and JavaScript SDKs.
- No settings to learn. One pass separates the voice from background noise, music and overlapping chatter, as ElevenLabs describes it.
- Upload or record in the browser, then preview and download the isolated voice.
Is ElevenLabs Voice Isolator Free?
Yes, for a few minutes a month. As checked November 3, 2026, the ElevenLabs Free plan includes 10,000 credits a month (about 10 minutes of Voice Isolator); no commercial license. A commercial license starts with Starter at $6 a month, which covers about 30 minutes of Voice Isolator.
When ElevenLabs Is the Better Pick
- You already pay for ElevenLabs. Isolation draws on the same credits as your text to speech, voice cloning or dubbing.
- You want one synchronous API call. The audio isolation endpoint returns the cleaned audio in the response.
- You need a few minutes a month for personal use. The Free plan covers about 10 minutes.
- You want vocals out of a song. Neither tool is built for that: ElevenLabs' documentation says Voice Isolator is not specifically optimized for isolating vocals from music, though it may work depending on the content. Diffio is for speech. A music stem splitter such as LALAL.AI fits better.
- You need clean audio live on a call. Neither works in real time; see Krisp for live calls.
Diffio vs ElevenLabs Voice Isolator by Workflow
| Need | Diffio | ElevenLabs Voice Isolator |
|---|---|---|
| Primary job | Restore recorded speech: background noise, room echo and some clipping or distortion | Separate speech from background noise, inside a voice AI platform |
| What you get back | Restored speech and the background as 2 tracks, a Background amount slider to mix them and a transcript | The isolated voice |
| Settings | Diffio 4.6 Flash on every plan, or Diffio 4.6 Pro on paid plans | None: one pass |
| Free | 3 uploads in total, audio or video, with a 2-minute preview of each result | 10,000 credits a month (about 10 minutes of Voice Isolator); no commercial license |
| File limits | Up to 2 GB and 90 minutes per file | Up to 500 MB and 1 hour per file |
| Video | Every plan; Diffio restores the speech soundtrack and the picture stays unchanged | Yes (MP4, MOV, MKV, WebM and more) |
| API | REST API with Python and Node SDKs and webhooks, $5 an hour (Flash) or $10 an hour (Pro), billed per second | POST /v1/audio-isolation with the file as multipart form data; cleaned audio comes back in the response (a /stream variant streams it); $0.12 per minute of audio on API pricing, billed in US dollars |
| Pricing model | Free plan, then Basic $8/month (6 h) or Pro $29/month (30 h) | Credits shared with every ElevenLabs feature, from $6/month for about 30 minutes |
| Our 59-clip test (October 22, 2026) | Diffio 4.6 Pro: SCOREQ +2.31 on average, word error rate 10.5%. Diffio ran the test; scores are model predictions, not a human listening study. Method and every clip. | ElevenLabs: SCOREQ +0.79 on average, word error rate 18.1%, on the same recordings. |
How Much Does ElevenLabs Voice Isolator Cost?
Voice Isolator uses 1,000 credits a minute from the same pool as every other ElevenLabs feature. As checked November 3, 2026, Starter is $6 a month (about 30 minutes), Creator $22 (about 121 minutes) and Pro $99 (about 600 minutes), or about $12, $10.91 and $9.90 an hour if every credit goes to Voice Isolator. Yearly billing costs $5, $18.33 and $82.50 a month. Through the API it is $0.12 per minute of audio on API pricing, billed in US dollars, about $7.20 an hour. Check ElevenLabs' current pricing before buying.
For comparison, Diffio Basic covers 6 hours a month for $8, about $1.33 an hour used in full. Compare cost per hour across six tools on AI audio enhancer pricing, or see Adobe Podcast vs ElevenLabs vs Diffio.
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.
Tested on the Same 59 Recordings
Diffio ran ElevenLabs and its own two models on the same 59 real recordings on October 22, 2026, each in its strongest speech cleanup mode at default amounts. Diffio 4.6 Pro raised the SCOREQ speech quality score by 2.31 on average, against 0.79 for ElevenLabs. Clip by clip on SCOREQ, ElevenLabs scored higher than Diffio 4.6 Pro on 0 of 59 clips.
Where Diffio did not win: On phone and remote calls (3 clips), ElevenLabs (4.2%) had a lower word error rate than Diffio 4.6 Pro (6.5%). On narration over music (1 clip), ElevenLabs (1.3%) had a lower word error rate than Diffio 4.6 Pro (6.3%).
Scores are model predictions, not a human listening test, and Diffio ran the test. The full method and every clip are on the results page.
All 59 recordings
Bars are averages over 59 clips; the thin lines show 95% intervals. On the word error rate view, the dashed line is the untouched original recording.
Show the numbers, including similarity to the original recording
| Tool | Quality gain (SCOREQ) | Word error rate | Similarity to the original recording |
|---|---|---|---|
| Diffio 4.6 Pro | +2.3195% interval 2.15 to 2.47 | 10.5%95% interval 7.8% to 13.7% | 0.58 |
| Diffio 4.6 Flash | +2.2695% interval 2.09 to 2.44 | 10.9%95% interval 7.6% to 15.1% | 0.56 |
| ElevenLabs | +0.7995% interval 0.60 to 0.98 | 18.1%95% interval 13.0% to 23.6% | 0.83 |
| Original recording | No processing (average SCOREQ 2.31) | 13.2%95% interval 9.6% to 17.3% | 1.00 |
Averages over 59 clips of real recordings, run October 22, 2026. A higher SCOREQ gain and a lower word error rate are better. Similarity to the original recording is measured against the noisy original, so a tool that changes less scores higher; it is not a measure of voice quality.
One typical clip per recording type (Diffio 4.6 Pro's median result). Pick any of the 8.
Sermon 17. Decades-old church recordings with tape hiss, hum and room sound.
Archived sermon recording, used with permission. Excerpts are loudness-matched for fair listening.
| Version | SCOREQ | Word error rate | Similarity to the original |
|---|---|---|---|
| Diffio 4.6 Pro | 4.86 | 6.7% | 0.55 |
| Diffio 4.6 Flash | 4.85 | 2.7% | 0.55 |
| ElevenLabs | 2.95 | 6.7% | 0.92 |
| Original recording | 2.40 | 5.3% | 1.00 |
Diffio is not affiliated with or endorsed by ElevenLabs. Product names are trademarks of their owners.
Hear the Difference
Keynote recorded in a live room: toggle Original vs Enhanced by Diffio.
FAQ
Is ElevenLabs Voice Isolator free?
Yes, for a few minutes a month. As checked November 3, 2026, the ElevenLabs Free plan includes 10,000 credits a month (about 10 minutes of Voice Isolator); no commercial license. A commercial license starts with Starter at $6 a month, which covers about 30 minutes of Voice Isolator.
How much does ElevenLabs Voice Isolator cost?
Voice Isolator uses 1,000 credits a minute from the same pool as every other ElevenLabs feature. As checked November 3, 2026, Starter is $6 a month (about 30 minutes), Creator $22 (about 121 minutes) and Pro $99 (about 600 minutes), or about $12, $10.91 and $9.90 an hour if every credit goes to Voice Isolator. Yearly billing costs $5, $18.33 and $82.50 a month. Through the API it is $0.12 per minute of audio on API pricing, billed in US dollars, about $7.20 an hour.
Does ElevenLabs Voice Isolator have an API?
Yes. POST /v1/audio-isolation with the file as multipart form data; cleaned audio comes back in the response (a /stream variant streams it). It costs $0.12 per minute of audio on API pricing, billed in US dollars. Diffio's API restores recorded speech at $5 an hour (Flash) or $10 an hour (Pro), billed per second. See the speech enhancement API comparison.
Can ElevenLabs Voice Isolator isolate vocals from a song?
ElevenLabs' documentation says Voice Isolator is not specifically optimized for isolating vocals from music, though it may work depending on the content. Diffio is built for speech too, so for song vocals use a music stem splitter such as LALAL.AI.
Is there an ElevenLabs Voice Isolator alternative for recorded speech?
Diffio restores speech in recordings you already have, audio or video, and returns the restored speech and the background as separate tracks. ElevenLabs remains the better pick inside its own voice platform.
Sources Checked November 3, 2026
ElevenLabs facts were checked November 3, 2026 on its own pages: ElevenLabs pricing, Voice Isolator page and plan table, Voice Isolator documentation and ElevenLabs API pricing. Diffio is not affiliated with or endorsed by ElevenLabs. Product names are trademarks of their owners. Test results: the speech enhancer test method, run October 22, 2026.
Try Diffio Free
Upload a recording you already have and hear the restored speech next to the original.