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Auphonic
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Alitu
Riverside.fm
Xound.io
AudioLinter analyzes podcast audio to EBU R128 and one-click-repairs it to -16 LUFS with true peak below -1 dBTP, right inside WordPress. Uploaded files are deleted within 48 hours on EU servers.

Website, pricing, platforms and company facts side by side.
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| Website | opalstack.com | audiolinter.com |
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As answered by people managing Opalstack and AudioLinter.
AudioLinter's answer:
Most loudness tools are standalone apps or require exporting to an external service. AudioLinter runs where podcasters already publish — WordPress — and fixes the file in place. EU-hosted, uploaded audio deleted within 48 hours, free analysis tier with no card required.
AudioLinter's answer:
It checks and fixes podcast loudness (EBU R128, −16 LUFS), true peak (−1 dBTP) and dead air directly inside the WordPress post editor — no separate app, no file upload to a third-party dashboard. One-click repair, not just a report.
AudioLinter's answer:
Built by a solo developer in Germany who kept seeing podcast episodes rejected or downranked for loudness/true-peak issues that a simple automated check could catch before publishing. Built directly into the WordPress workflow podcasters already use.
AudioLinter's answer:
PHP/WordPress plugin frontend, Python/FastAPI backend for audio analysis (EBU R128 loudness, true-peak metering), Next.js marketing/account site, self-hosted on Hetzner (EU).
AudioLinter's answer:
Independent podcasters and small podcast networks who self-host on WordPress (often via Podlove or similar plugins) and want their episodes to meet Spotify/Apple/YouTube loudness specs without hiring an audio engineer.
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