Overview

Mirelo is an AI sound-effects tool for video makers who want audio generated to match picture, or need to shape effects from prompts. Its strongest case is a workflow that combines synchronized generation with editing and integrations; the free tier is useful for trying it, but its short project-retention window and export watermark make it a poor home for ongoing work.

Key features

Sound matched to video: Mirelo SFX analyzes scenes and actions to generate effects timed to the frames. That makes it relevant when manually finding and syncing effects is the bottleneck.
Prompt-based sound: Text prompts can produce effects, including off-screen or imaginative sounds. This extends the tool beyond what is visibly happening in a clip.
Iterative audio editing: Users can extend clips, create seamless ambient loops, and repair glitches while preserving the rest of a take. These controls make Mirelo more useful than a one-shot generator when a result needs refinement.
Studio and integrations: Mirelo Studio is a browser workspace for video-to-sound, text-to-SFX, and editing. Plugins for Adobe Premiere Pro, DaVinci Resolve, and Roblox Studio, plus an API and MCP connection for compatible clients including Claude, Cursor, and ChatGPT, give creators and developers several ways to bring generation into a workflow.
Security and support: Mirelo AI GmbH says its information security management system is certified to ISO/IEC 27001:2022 through July 13, 2029. It says customer data is encrypted in transit and at rest, with production access following least privilege. Email support covers Studio, billing, and API issues, with a stated response time of two business days.

Pricing

Mirelo is freemium, with monthly billing through Stripe. After creating an account, users can upgrade, downgrade, or cancel in Studio.

Free — 0 €/month: 5,000 monthly credits and three projects, using the latest audio models. It is a low-commitment way to assess the workflow, but projects are deleted after one week and exports carry a watermark, so it is not suited to keeping work or delivering clean exports.
Creator — 20 €/month: 24,000 monthly credits, 20 projects, the latest models, and extra credits at 0,90 € per 1,000. This is the entry paid plan for individual creators who need more room and retained projects.
Studio — 99 €/month: 120,000 monthly credits, unlimited projects, the latest models, and extra credits at 0,90 € per 1,000. It suits heavier use where the Creator project cap is restrictive.
Scale — 299 €/month: 420,000 monthly credits, unlimited projects, and extra credits at 0,80 € per 1,000. The larger allowance and lower extra-credit rate fit high-volume work.
Business — 999 €/month: 1,440,000 monthly credits, unlimited projects, and extra credits at 0,75 € per 1,000. This is aimed at substantial recurring demand rather than occasional sound design.
Enterprise — custom pricing: Custom monthly credits and volume pricing, unlimited projects, the latest models, API access, and dedicated support. It is the option for organizations needing tailored volume and support.

Paid tiers retain access to the latest Mirelo audio models. The quoted plans are monthly; no seat allowances are given, so team size should not be assumed from the plan names.

Platforms

Mirelo supports web, macOS, Windows, and API access. The browser-based Studio, editor plugins, and developer tools make it applicable to both production workflows and software integrations. Text-to-sound is supported, the maximum clip length is 60 seconds, commercial use is included, and download formats are categorized as other.

Who it's for

Mirelo is best suited to video creators who need frame-timed effects and want to refine generated audio without rebuilding a whole take. It also makes sense for developers integrating video-to-sound through an API or MCP client. Those who need long-term project retention or watermark-free exports should move beyond the free plan; those who need more than 60 seconds per clip should look elsewhere.

Pros and cons

Pro: Video-aware timing and text prompts cover both visible action and sounds that are not on screen.
Pro: Clip extension, looping, and glitch repair support revision rather than only first-pass generation.
Pro: Plugins, API access, and MCP integration provide routes into editing and developer workflows.
Con: Free projects last only one week, and free exports are watermarked, limiting the tier to evaluation or temporary work.
Con: The 60-second maximum clip length rules out longer continuous generations.
Con: Higher monthly credit allowances come with steeply higher plan prices, making the larger tiers relevant mainly when usage warrants them.

Alternatives

For a broader category comparison, see AI Sound Effect Generators. Readers comparing adjacent audio tools can also browse AI Audio-to-MIDI Software.

Morphic is worth considering for a web-based tool with a free tier capped at 20 credits and one user.
Sonilo is an option for readers who want Android or iOS access alongside web and API, with recurring free credits and preview-quality exports.
Async may suit users seeking an iOS option; its free tier includes 10 lifetime AI credits and up to 720p export.
Noiz AI is another free option for iOS or web.
AudioGen may fit developers seeking a free self-hosted API/Linux option, provided they have a GPU with at least 16 GB memory.
Phaser is an open-source framework for JavaScript and TypeScript development with WebGL and Canvas rendering.
SeedAudio offers a free web tier with generations up to 60 seconds.
SFX Studio is a free web and API option with no watermark; its Pro plan is 9.50 USD per month.

Verdict

Choose Mirelo if video-synchronized sound effects, iterative editing, and integration options matter more than a low monthly price. Its free tier is a sensible trial, not a durable production tier: project deletion and watermarked exports are material constraints. Look elsewhere if you need clips longer than 60 seconds or want a lower-cost ongoing workflow.

	Mirelo	SoundFactory
Free plan	Yes	No
Free trial	No	No
Paid from	€20/mo	—
Open source	No	No
Platforms	api, macOS, Web, Windows	Web
Free plan	Yes	Yes
Text-to-sound	Yes	Yes
Maximum clip length	60 s	—
Download formats	other	wav + mp3
Commercial use	included	unclear
API access	Yes	—

Mirelo vs SoundFactory

Mirelo

SoundFactory