Curlo
Summary
Browsing a 20,000-file sound effects library by filename is how you spend forty minutes looking for a door creak — Curlo exists to replace that with a plain-language description and get you the file in seconds.
Curlo is a macOS audio search and organization tool that lets sound designers and editors query their local libraries the way they'd describe a sound to a colleague. The core workflow is semantic search: you describe what you need, and Curlo surfaces matching files from your collection. Processing runs locally, which means your proprietary sound library never leaves the machine. The local API extends this into DAW and production pipelines, so search can live inside the tools you already use. The ceiling appears around complex cross-library deduplication and anything requiring Windows or cloud-sync workflows — those teams look elsewhere.
Bottom line: Pick Curlo if you're a macOS sound designer drowning in a local effects library and need to search by description rather than filename; skip it if your team is on Windows or needs a shared, cloud-synced library across multiple workstations.
Pricing Plans
Flat RateLast verified 2 months ago- Price
- $39.9/year or $99 one-time
- Free Tier
- Semantic Search, Metadata Search, Tags & UCS Classification, Up to 5,000 indexed files
Free
Perfect for getting started
- Semantic Search
- Metadata Search
- Tags & UCS Classification
- Up to 5,000 indexed files
Pro
Unlock the full power
- Everything in Free
- Metadata Writing
- Local API
- Similar Audio Search
- Unlimited indexed files
- Priority support
Lifetime
Pay once, use forever
- Everything in Pro
- All future updates
- No recurring payments
View full pricing on curlo.ahrisy.com →
Pricing may have changed since last verified. Check the official site for current plans.
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Pros
Sign in to edit- Semantic description-based search, so you find a 'wet gravel footstep' by describing it rather than scanning hundreds of ambiguously named files — the forty-minute browse becomes a query.
- On-device processing with no audio data sent to external servers, which means studios with proprietary or NDA-covered assets can use it without a legal review of data handling policies.
- UCS-standard metadata writing that embeds classification directly into files, so your organization survives a migration away from Curlo rather than dying in a proprietary database.
- Local API on paid tiers, so audio search can be triggered from inside a DAW or a production script instead of requiring a context switch to a separate app.
- Free tier handles libraries up to 5,000 files, which means a solo editor or junior sound designer can validate the workflow before committing to a paid tier.
Cons
Sign in to edit- The tool is macOS-only — a Windows-based post-production team cannot use it at all, and that is a hard stop that sends them to browser-based or cross-platform audio search alternatives regardless of how well the search quality performs.
- Metadata writing and the local API are paid-only features, which means the free tier is a search-only evaluation tool — teams that discover they need to push metadata back to files or integrate with a DAW hit a paywall before they can run a real production workflow test.
- Semantic search quality is bounded by the metadata and audio content Curlo can analyze in your existing files; libraries with years of inconsistent naming and stripped metadata will return noisy results until a manual cleanup pass is done — that remediation work falls entirely on the user.
- There is no shared or cloud-synced library mode described in the vendor documentation, so a team of three editors who need to search the same asset library from different machines cannot use Curlo as a shared source of truth — they either duplicate the library on each machine or switch to a team-oriented DAM solution.
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About
- Platforms
- macOS
- API Available
- Yes
- Self-Hosted
- Yes
- Last Updated
- 2026-06-04T22:35:37.615Z
Best For
Who it's for
- Sound designers and audio engineers managing large effect libraries
- Video editors and content creators searching for audio assets
- Privacy-conscious users who need local-only audio processing
- macOS-based production workflows requiring API integration
- Audio librarians standardizing organization with UCS classification
What it does well
- Finding sound effects by describing the audio needed rather than browsing file names
- Organizing large audio libraries with semantic tagging and metadata management
- Integrating audio search into DAW and production workflows via local API
- Discovering audio variations and similar sounds within a library
- Maintaining searchable metadata across audio file collections
Integrations
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Frequently Asked Questions
- Is Curlo free?
- Curlo has a permanent free tier alongside paid upgrades (paid plans from $39.9/year or $99 one-time). You can keep using a baseline version indefinitely without paying.
- Is Curlo open source?
- No — Curlo is a closed-source tool. Source code is not publicly available.
- Does Curlo have an API?
- Yes. Curlo exposes a developer API. See the official documentation at https://curlo.ahrisy.com for details.
- Can I self-host Curlo?
- Yes. Curlo supports self-hosting on your own infrastructure.
- What platforms does Curlo support?
- Curlo is available on: macOS.
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Curated lists that include this category
Audio libraries grow faster than the naming conventions that were supposed to tame them. Curlo addresses this by applying semantic search to local audio collections — you type a description like ‘distant thunder rolling over water’ and the tool returns matching files from your drive rather than forcing you to recall what someone named the file three years ago. The organizational side writes standardized metadata back to files using UCS (Universal Category System) classification, so the structure you build in Curlo persists in the files themselves, not just in a proprietary database.
The differentiating feature is the privacy architecture. All audio analysis and search processing happens on-device. For studios managing proprietary sound design assets or clients with NDA-covered production audio, this removes the data-leave-the-building problem that rules out cloud-based audio search tools entirely. The vendor states the local API is available on paid tiers, which is what connects Curlo’s search capability to DAW environments and scripted production workflows rather than keeping it siloed as a standalone app.
Curlo fits cleanly into solo and small-team macOS production workflows where one person owns a large local library and needs to both find sounds faster and keep the library organized consistently over time. It breaks down when the library needs to be shared across machines in real time, when the team is on Windows, or when the search use case is discovery across multiple third-party sound libraries with different folder structures and inconsistent embedded metadata — the semantic layer can only work with what the files and their existing metadata provide.