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CosmoWhisper
FreemiumSelf-Hosted
Windows professionals have been stuck choosing between Mac-only voice dictation tools and browser-wrapped stopgaps that stall behind corporate firewalls and eat RAM — CosmoWhisper is a native Windows app built to close that gap.
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Screenshots 2
Summary
Built in C#/.NET with the Windows App SDK, it idles under 90MB RAM and delivers sub-500ms transcription across Slack, Word, Outlook, Notion, and VS Code without an Electron runtime weighing it down. The local offline mode — called Race Mode — runs a Whisper server entirely on-device, so audio never leaves the machine, which is the architecture medical and legal teams need for HIPAA compliance. Smart Commands let you highlight text and say 'Fix grammar' or 'Summarize' for inline edits. The free tier caps at 60 minutes per month, which is enough for evaluation but not for a full workday. Teams that need cross-platform coverage — a Windows desk paired with a MacBook — hit a hard wall immediately, as the vendor states Windows 10/11 is the only supported OS.
Bottom line: A well-engineered pick for Windows-only shops where a medical transcriptionist or developer needs offline, HIPAA-ready dictation — but if even one person on your team works on a Mac, you are buying two tools.
Pricing Plans
SubscriptionLast verified 2 days ago- Price
- $12/mo
- Free Tier
- 60 free minutes per month (~8,000 words)
Starter
Free
The start of your productivity journey. Perfect for trying the power of voice.
- 60 free minutes per month (~8,000 words)
- Basic smart formatting
- Custom vocabulary
- Works in all apps
Pro
$12per month
For individuals who want to write 4x faster. Unlimited power.
- Unlimited transcription
- Smart Style Context (Learns your voice)
- All AI Smart Modes (Edit, Polish)
- Instant text replacements
- Priority email support
Ultimate
$29per month
Maximum performance with Race Mode. Local privacy & automation.
- Everything in Pro
- Race Mode (Ultra-Fast Local & Privacy)
- System Control (Volume, Apps)
- Read Aloud Selection
- Developer API Access
Medical
Custom
HIPAA-ready transcription for healthcare professionals.
- Everything in Ultimate
- Specialized Medical Models
- EHR Integration Support
- BAA Available
- Dedicated Onboarding
View full pricing on cosmowhisper.com →
Pricing may have changed since last verified. Check the official site for current plans.
Find your fit
Before you choose CosmoWhisper
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Pros
- Native C#/.NET build idles under 90MB RAM with no Electron runtime, so it does not compete with your IDE or browser for memory during a long coding session.
- Race Mode runs a full Whisper server locally with zero cloud exposure, which means a medical transcriptionist can chart in an EHR system offline without PHI ever touching an external server.
- HIPAA-ready architecture with Zero Data Retention and memory purge on exit, so legal and medical teams skip the compliance review that cloud-only tools require — that review is a paid-only feature.
- Smart Commands let you highlight existing text and speak edit instructions inline, so you avoid tab-switching to a separate AI editor mid-document.
- VPN and corporate firewall detection with a Force Cloud Proxy fallback, so it does not silently fail when an IT-managed network blocks standard traffic.
Cons
- Windows 10/11 is the only supported OS — no Mac, no Linux, no mobile. A team where even one member works on a macOS laptop cannot standardize on this tool and will run CosmoWhisper alongside Superwhisper or a browser-based alternative, which defeats the workflow consistency argument entirely.
- No API is documented or listed anywhere on the vendor page. Teams that want to embed transcription into their own application — a custom EHR module, a developer tool, a Slack bot — cannot use CosmoWhisper programmatically and will need a separate transcription service like Deepgram or AssemblyAI for that layer.
- The free tier caps at 60 minutes of transcription per month. A professional who dictates for more than a couple of hours per week hits that ceiling within days and must move to the paid tier or stop mid-workflow — there is no grace buffer described on the vendor page.
- HIPAA-ready mode is a paid-only feature. A solo medical practitioner evaluating the tool on the free tier is testing a configuration that does not reflect the compliance posture they actually need, which means the evaluation period can produce a false signal about regulatory fit.
About
- Platforms
- Windows 10, Windows 11
- API Available
- No
- Self-Hosted
- Yes
- Last Updated
- September 9, 2026
Best For
Who it's for
- Windows professionals and developers
- Medical and legal users needing HIPAA compliance
- Users requiring fully offline transcription
What it does well
- Dictating into VS Code for code and documentation
- Medical charting in EHR systems with pharmacology terms
- Drafting legal contracts and briefs offline
- Writing technical reports in Notion or Word
Integrations
Frequently Asked Questions
- Is CosmoWhisper free?
- CosmoWhisper offers a free option alongside paid upgrades. Pricing: $12/mo. Check the current allowances and terms before choosing a plan.
- Can I self-host CosmoWhisper?
- Yes. CosmoWhisper supports self-hosting on your own infrastructure.
- What platforms does CosmoWhisper support?
- CosmoWhisper is available on: Windows 10, Windows 11.
The Windows dictation gap
Windows professionals have been stuck choosing between Mac-only voice dictation tools and browser-wrapped stopgaps that stall behind corporate firewalls and eat RAM. CosmoWhisper is a native Windows app built to close that gap.
Core features
Built in C#/.NET with the Windows App SDK, it idles under 90MB RAM and delivers sub-500ms transcription across Slack, Word, Outlook, Notion, and VS Code without an Electron runtime. The local offline mode, called Race Mode, runs a Whisper server entirely on-device so audio never leaves the machine. This architecture supports HIPAA compliance for medical and legal teams. Smart Commands let you highlight text and say ‘Fix grammar’ or ‘Summarize’ for inline edits. The free tier caps at 60 minutes per month.
Pricing and limits
Subscription pricing starts at $12 per month. Self-hosted option is available.
Who it is for / who should skip it
Best for Windows professionals and developers, medical and legal users needing HIPAA compliance, and anyone requiring fully offline transcription. Skip it if you need Mac, Linux, or mobile support, or if you require a documented API for custom integrations.
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