Aqua Voice vs OpenWhispr summary
Aqua Voice and OpenWhispr both dictate into any app with a hotkey, on opposite philosophies. OpenWhispr is free and open-source, running open models (Whisper, Parakeet) and your own keys locally on Mac, Windows, or Linux. Aqua Voice runs its own model, Avalon (97.3% on technical terms), in the cloud, with zero setup plus iPhone. Pick OpenWhispr for free, offline, and Linux; Aqua Voice for accuracy and convenience, $8/mo billed annually.
Free and on-device vs managed and cloud
OpenWhispr is a free, open-source dictation app that positions itself as the open-source alternative to Wispr Flow. You install it, it runs open speech models on your machine, and everything happens locally on Mac, Windows, or Linux. Your audio never leaves the device, and the open-source core is free for unlimited local use. Cloud features are freemium: the free plan meters cloud transcription and meeting recordings, and heavier use, sync, and team features move to paid Pro (about $80 per user a year) and Business (about $200 per user a year) plans.
Aqua Voice takes the opposite approach. We run our own model, Avalon, in the cloud, so there's nothing to download or configure, the model is larger and more accurate than what fits on a laptop, and it keeps improving without you updating anything. The tradeoff is honest: it's a paid, cloud service rather than a free, on-device one.
What model does OpenWhispr use?
OpenWhispr is open about its models: it runs OpenAI's Whisper and NVIDIA's Parakeet locally, and it supports bring-your-own-key (BYOK) so you can wire in your own provider. These are strong, general-purpose models, freely available and well-documented, and you pick which one to run.
The tradeoff with general-purpose models is that they weren't designed for specialized vocabulary. Everyday speech is fine, but technical terms, programming keywords, and AI tooling are where they struggle. That's the gap a purpose-built model closes, so we trained our own and published its results.
We built Avalon on a benchmark of real clips of developers and AI researchers talking naturally, and measured it against Whisper Large v3, one of the open models OpenWhispr can run:
Model
AISpeak accuracy
Avalon (ours)
97.3%
Whisper Large v3
65.1%
On the public OpenASR leaderboard, Avalon ranked #1 among proprietary systems at its October 2025 debut, ahead of Whisper on that leaderboard. OpenWhispr also offers NVIDIA's Parakeet, which we haven't benchmarked head-to-head; either way, the technical-vocabulary gap is what matters most to developers and power users. Try Aqua Voice free.
Where OpenWhispr wins
Free and open-source. OpenWhispr's open-source core is completely free for unlimited local dictation, with the source openly available. If you want to read the code, self-host, bring your own key, or avoid a subscription entirely, that's a real advantage Aqua Voice doesn't offer.
Fully on-device and offline. OpenWhispr runs the model locally, so your audio never leaves your machine and it works with no internet connection. If on-device privacy is non-negotiable, OpenWhispr has the edge.
Linux, BYOK, and AI cleanup. OpenWhispr runs on Linux (Aqua Voice doesn't), lets you bring your own key and swap models, and includes an AI cleanup pass on your transcript. The flip side is that you manage the models, keys, and setup yourself.
Where Aqua Voice is better
Accuracy without the setup
Avalon is purpose-trained for technical and AI speech and benchmarked publicly: 97.3% on AISpeak where Whisper Large v3 scores 65.1%, and #1 among proprietary systems on the OpenASR leaderboard at its October 2025 debut. OpenWhispr's accuracy depends on which open model or key you use and how powerful your machine is.
Zero setup, always current
Aqua Voice runs server-side, so there are no models to download, no keys to manage, no hardware requirements, and no configuration. The model keeps improving on its own, where a local tool is frozen to whatever you've installed until you update it.
Real-time on a bigger model
Because Avalon runs in the cloud, it streams text as you speak on a model larger than a laptop can run. On-device tools are gated by your machine: the more accurate the local model, the slower it goes.
iPhone and screen context
Aqua Voice runs on iPhone as well as Mac and Windows, on one subscription, and the desktop app reads the active window for context, code-aware in your editor, casual in Messages. OpenWhispr is desktop-only (Mac, Windows, Linux) with no iPhone app.
A model developers can build on
The same model is available through the Avalon API, OpenAI-compatible, at $0.39/hour of audio, so you can put Avalon-grade accuracy into your own tools.
Aqua Voice vs OpenWhispr: Feature-by-feature comparison
Aqua Voice
OpenWhispr
Speech model
Avalon (own, purpose-trained)
Open models (Whisper, Parakeet) + BYOK, local
Cost
$8/mo ($96/yr), free tier
Free local + open-source core; paid cloud (Pro ~$80/yr, Business ~$200/yr)
Public benchmark
#1 proprietary on OpenASR (Oct 2025 debut)
Not published (model-dependent)
Technical-term accuracy
97.3% (AISpeak, our benchmark)
Not published (model + hardware)
Setup
Zero (cloud, nothing to install)
Install, pick a local model or key
Processing
Cloud (server-side)
On-device
Works offline
❌ (cloud)
✅ (on-device core)
Mac / Windows
✅
✅
Linux
❌
✅
iPhone
✅
❌
Real-time + screen context
✅
Hardware-dependent
Account required
✅
❌ (open-source core)
Best for
Accuracy, zero setup, technical/AI users, iPhone
Free, on-device, open-source, Linux, BYOK
How to decide
Pick Aqua Voice if: You want the most accurate dictation with nothing to set up; you dictate code, AI prompts, or technical terms and want accuracy you can verify; you want real-time cloud processing, iPhone support, and ongoing improvements; or you'd rather not manage a local model or your own keys yourself.
Pick OpenWhispr if: You want a free, open-source tool; you need everything to run on-device and offline; you're on Linux; or you like reading the code, bringing your own key, swapping models, and self-managing your setup.
Aqua Voice is free to start, so you can compare it against OpenWhispr on the words you actually dictate before paying anything.
Or just ask ChatGPT.
Frequently asked questions
Is Aqua Voice a good OpenWhispr alternative?
It depends on what you value. OpenWhispr is free and open-source, runs entirely on your own machine, and pitches itself as the open-source alternative to Wispr Flow. Aqua Voice is a managed service on its own model, Avalon, with higher accuracy on technical speech (97.3% on AISpeak), zero setup, iPhone support, and ongoing improvements. If you want a free, on-device, do-it-yourself tool, OpenWhispr is great; if you want the most accurate dictation with nothing to configure, Aqua Voice is the stronger choice.
What's the difference between Aqua Voice and OpenWhispr?
They're built on opposite philosophies. OpenWhispr is free and open-source, running open speech models like OpenAI's Whisper and NVIDIA's Parakeet (plus bring-your-own-key options) locally on your Mac, Windows, or Linux machine. Aqua Voice is a managed cloud app running Avalon, its own purpose-trained model, with real-time streaming, screen-context awareness, and iPhone support. Both dictate into any app with a hotkey.
Is Aqua Voice more accurate than OpenWhispr?
On technical and AI speech, yes. OpenWhispr runs general-purpose open models (Whisper, Parakeet) or whatever key you bring, so its accuracy depends on the model and hardware you choose. Aqua Voice runs Avalon, trained specifically for technical vocabulary: it scores 97.3% on AISpeak (our benchmark of AI and technical terms) where Whisper Large v3 scores 65.1%, and it ranked #1 among proprietary systems on the public OpenASR leaderboard at its October 2025 debut.
Is Aqua Voice free like OpenWhispr?
OpenWhispr's open-source core is free and runs unlimited local dictation, and its free plan adds metered cloud (2,000 words a week of cloud transcription and 5 hours of meeting recordings a month). Heavier cloud use, sync, and team features move to paid plans: Pro is about $80 per user a year, and Business about $200 per user a year. Aqua Voice has a free Starter tier (1,000 lifetime words), then Pro is $8/month billed annually. You're paying for a purpose-built, benchmarked model, zero setup, real-time cloud processing, iPhone support, and ongoing model improvements and support, rather than running and maintaining an open model yourself.
Does Aqua Voice work offline like OpenWhispr?
No. OpenWhispr's open-source core runs on-device, so it works offline and your audio never leaves your machine. Aqua Voice processes audio in the cloud to run the Avalon model, so it needs an internet connection. If fully offline, on-device dictation is a requirement, OpenWhispr is the better fit.
Does Aqua Voice run on Linux?
No. Aqua Voice runs on Mac, Windows, and iPhone. OpenWhispr also supports Linux, so if you need Linux dictation, OpenWhispr is the option. Aqua Voice covers iPhone, which OpenWhispr does not, so the platform lineup is a tradeoff rather than a clean win either way.
Why pay for Aqua Voice when OpenWhispr is free?
For accuracy and convenience. Avalon is purpose-trained and benchmarked publicly: on AISpeak it scores 97.3% to Whisper Large v3's 65.1% (Whisper is one of the open models OpenWhispr runs). Aqua Voice also requires zero setup (no model downloads, keys, or tuning), runs a large model server-side that no laptop can match, adds screen-context awareness and iPhone support, and keeps improving with ongoing updates and support. OpenWhispr is an excellent free, open-source option if you'd rather self-manage an open model or bring your own key.
Is Aqua Voice good for coding and AI prompting?
Yes, it's what Aqua Voice is built for. Avalon was trained on the speech developers and AI users produce, reaching 97.3% accuracy on technical terms like programming keywords, framework names, and CLI commands. It also reads the active app for context and offers the Avalon API for developers.